U.S. patent application number 12/401770 was filed with the patent office on 2009-07-09 for energy-saving service offering method and apparatus therefor.
Invention is credited to Atsushi Abe, Tetsuo Fujigaki, Takaaki Miyabe, Kazuo Sato, Taichirou Yabuno, Takashi Yabutani, Yuji Yamamoto.
Application Number | 20090177331 12/401770 |
Document ID | / |
Family ID | 17320695 |
Filed Date | 2009-07-09 |
United States Patent
Application |
20090177331 |
Kind Code |
A1 |
Yabutani; Takashi ; et
al. |
July 9, 2009 |
Energy-Saving Service Offering Method And Apparatus Therefor
Abstract
An energy saving support service offering method includes
introducing an inverter at least in a load facility having a motor
with an expense of an energy saving support service provider and/or
its cooperatives, and performing an electric power saving operation
by an inverter control operation.
Inventors: |
Yabutani; Takashi;
(Hitachinaka, JP) ; Miyabe; Takaaki; (Mito,
JP) ; Abe; Atsushi; (Hitachi, JP) ; Yamamoto;
Yuji; (Hitachi, JP) ; Fujigaki; Tetsuo;
(Hitachi, JP) ; Yabuno; Taichirou; (Hitachi,
JP) ; Sato; Kazuo; (Hitachi, JP) |
Correspondence
Address: |
ANTONELLI, TERRY, STOUT & KRAUS, LLP
1300 NORTH SEVENTEENTH STREET, SUITE 1800
ARLINGTON
VA
22209-3873
US
|
Family ID: |
17320695 |
Appl. No.: |
12/401770 |
Filed: |
March 11, 2009 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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11123198 |
May 6, 2005 |
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12401770 |
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|
10913396 |
Aug 9, 2004 |
7076339 |
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11123198 |
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09661373 |
Sep 13, 2000 |
6775595 |
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10913396 |
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Current U.S.
Class: |
700/291 ;
705/412 |
Current CPC
Class: |
Y02P 80/10 20151101;
Y04S 50/14 20130101; Y04S 50/16 20180501; H02J 3/008 20130101; G06Q
50/06 20130101; Y04S 50/10 20130101; Y02P 80/11 20151101; G06Q
30/0241 20130101 |
Class at
Publication: |
700/291 ;
705/412 |
International
Class: |
G05D 17/00 20060101
G05D017/00; G06Q 30/00 20060101 G06Q030/00 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 13, 1999 |
JP |
11-258471 |
Claims
1. An energy saving support service offering method, comprising the
steps of: introducing an inverter at least in a load facility
having a motor with an expense of an energy saving support service
provider and/or its cooperatives; and performing an electric power
saving operation by an inverter control operation.
2. A method for calculating an effect of saved power consumption of
an energy saving operation support method, comprising the steps of:
storing data; calculating a power saving effect utilizing data when
an inverter is introduced which controls a rotation speed of a
driving motor for at least one of a fan, a blower and a pump of a
power consumption system; wherein the data which is stored includes
power consumption data corresponding to wind volume or flow volume
before the inverter is introduced; wherein the data which is
utilized for calculation includes wind volume data or flow volume
data at every moment after the inverter is introduced and which
controls the rotation speed; wherein the data which is utilized for
calculation includes actual power consumption data at every moment
after the inverter is introduced and which controls the rotation
speed; wherein the calculating includes estimating a power
consumption at every moment before the inverter is introduced
corresponding to the wind volume data or the flow volume data at
every moment after the inverter is introduced and which controls
the rotation speed, based on a relation between the stored wind
volume and flow volume before the inverter is introduced and the
power consumption data; or wherein the calculating includes
calculating a saved power consumption corresponding to a difference
between an accumulated power consumption from a first time to a
second time before the inverter is introduced and an accumulated
power consumption from the first time to the second time after the
inverter is introduced, based on the actual power consumption data
at every moment after the inverter is introduced and which controls
the rotation speed, and wherein the calculated estimated power
consumption at every moment before the inverter is introduced is
calculated using the stored data.
3. A method for calculating power consumption before an inverter is
introduced to a power consumption system, wherein: a) according to
a technique for saving energy an inverter is introduced by a
service provider for controlling rotation speed of a driving motor
for a device which is at least one of a fan, blower and pump; b) a
user collects current and voltage supplied to the motor via a volt
meter and a current meter and a fluid processing volume at every
moment that is a wind volume or flow volume at every moment of the
device corresponding to the collected voltage and current via a
detector of the fluid processing volume; c) the service provider
uses a merit amount of an energy saved operation for calculating an
amount of money received by the service provider as consideration
of the energy saved operation from the user, in an energy saving
support method, wherein the merit amount of the energy saved
operation is calculated corresponding to a difference between the
power consumption before and after the introduction of the
inverter; and d) calculating power consumption before introduction
of the inverter by performing: d1) processing to receive a fluid
processing volume of the device at every moment which is collected
by an operation data collecting system at premises of the user via
a communication line; and d2) processing to calculate a power
consumption at every moment corresponding to the collected fluid
processing volume at every moment using a relation between fluid
processing volume of the device and power consumption of the motor,
measured and stored in advance, to accumulate the calculated power
consumption, and to calculate the power consumption before the
inverter is introduced.
4. A method for calculating power consumption before an inverter is
introduced, according to claim 3, wherein the fluid processing
volume of the device is collected by the operation data collecting
system for a predetermined time period and transmitted via the
communication line.
5. A method for calculating power consumption before an inverter is
introduced, according to the claim 3, wherein the operation data
collecting system calculates the power consumption when the
inverter is introduced by accumulating the collected current and
voltage, and the power consumption when the inverter is introduced,
and the power consumption when the inverter is not introduced in
accordance with data obtained via the communication line from the
operation data collecting system.
6. An apparatus for calculating an effect of saved power
consumption of an energy saving operation support method,
comprising: a storing apparatus for storing data; a data processing
apparatus for calculating a power saving effect when an inverter is
introduced which controls a rotation speed of a driving motor for
at least one of a fan, a blower and a pump of a power consumption
system: wherein the storing apparatus stores power consumption data
corresponding to wind volume or flow volume before the inverter is
introduced; wherein the data processing apparatus receives wind
volume data or flow volume data at every moment after the inverter
is introduced and controls the rotation speed; wherein the data
processing apparatus receives actual power consumption data at
every moment after the inverter is introduced and controls the
rotation speed; wherein the data processing apparatus estimates a
power consumption at every moment before the inverter is introduced
corresponding to the wind volume data or the flow volume data at
every moment after the inverter is introduced and controls the
rotation speed, based on a relation between the stored wind volume
or flow volume before the inverter is introduced and the power
consumption data; and wherein the data processing apparatus
calculates the saved power consumption corresponding to the
difference between an accumulated power consumption from a first
time to a second time before the inverter is introduced and an
accumulated power consumption from the first time to the second
time after the inverter is introduced, based on the actual power
consumption data at every moment after the inverter is introduced
and controls the rotation speed, and the estimated power
consumption at every moment before the inverter is introduced that
is calculated using the stored relation.
7. A data processing apparatus for calculating power consumption
before an inverter is introduced, wherein: a) according to a
technique for saving energy an inverter is introduced by a service
provider for controlling rotation speed of a driving motor for a
device including at least one of a fan, blower and pump of a power
consumption system: b) a user collects current and voltage supplied
to the motor via a volt meter and a current meter and fluid
processing volume at every moment that is wind volume or flow
volume at every moment of the device corresponding to the collected
voltage and current via means for detecting the fluid processing
volume; c) the service provider uses a merit amount of the energy
saved operation which is base for calculating an amount of money
received by the service provider as consideration of energy saved
operation from the user, in an energy saving support method,
wherein the merit amount of the energy saved operation is
calculated corresponding to a difference between power consumptions
for before and after the introduction of the inverter; and d) the
data processing apparatus for calculating power consumption before
an inverter performs; d1) processing to receive fluid processing
volume of the subject device at every moment collected by a
operation data collecting system at premises of the user via a
communication line; and d2) processing to calculate power
consumption at every moment corresponding to the collected fluid
processing volume at every moment using a relation between fluid
processing volume of the device and power consumption of the motor,
measured and stored in advance, to accumulate the calculated power
consumption and to calculate power consumption before the inverter
is introduced.
8. A data processing apparatus for calculating power consumption
before an inverter is introduced, according to the claim 7, wherein
the fluid processing volume of the device received by the data
processing apparatus is collected by the operation data collecting
system for a predetermined time period and transmitted via the
communication line.
9. A data processing apparatus for calculating power consumption
before an inverter is introduced, according to the claim 7, wherein
the operation data collecting system calculates a power consumption
when the inverter is introduced by accumulating the collected
current and voltage; and the data processing apparatus receives the
power consumption when the inverter is introduced, which is
necessary for the data processing apparatus to calculate the
difference from the power consumption when the inverter is not
introduced via the communication line from the operation data
collecting system.
Description
CROSS REFERENCE TO RELATED APPLICATION
[0001] This is a continuation of U.S. Ser. No. 11/123,198, filed
May 6, 2005, which is a divisional application of U.S. Ser. No.
10/913,396, filed Aug. 9, 2004, which is a continuation of U.S.
application Ser. No. 09/661,373, filed Sep. 13, 2000, the subject
matter of which is incorporated by reference herein.
BACKGROUND OF THE INVENTION
[0002] The present invention relates to an energy saving service
offering method and its apparatus, which is suitable for use in
connection with an energy saving operation performed for example,
in factories.
[0003] In the Kyoto Conference on Global Warming held in December,
1997, a warming curtailment goal was defined so that the reduction
fraction may be 6% of that in 1987. Taking this into consideration,
the "Law related to Rationalization of Energy Usage (Energy Saving
Law)" was amended and enforced in April of 1999. Though large-scale
factories had been obligated by the law to engage in the promotion
of energy saving features initially, the scope of the Energy
Conservation Act was augmented to include medium-scale factories as
well.
[0004] The load facility conventionally used in factories includes
fans, blowers and pumps, and various motors are used for driving
such equipment. It is often a common approach to install inverters
in order to reduce the electric power consumption (promote energy
saving) in various motors for driving this equipment. In the case
of attempting to reduce electric power consumption by installing
inverters, whether inverters should be purchased, rent or leased is
determined by calculating the advantages brought about by
installing inverters.
[0005] In the conventional method, in case of purchasing inverters,
the initial investment is typically quite large, and in case of
obtaining inverters on the basis of a lease or rental contract, the
rental fee may be high or the user may be obliged to continue to
pay the rental fee, even if the expected effect of energy saving is
not attained by the user.
[0006] The conventional business schemes and their problems are
described more specifically below according to those examples
discussed above.
(A) Purchase Scheme and its Problem
[0007] In a case where the user purchases inverters combined with
new motors, or purchases inverters alone, the user has to provide
the initial investment and bear a heavy burden of a large
investment, and such investments are assumed to be made before it
is possible to determine the extent of the electric power
consumption saving that may actually be attained.
(B) Lease or Rental Schemes and their Problems
[0008] In leasing inverters with new motors, or inverters alone,
the user enters into a contract whereby he or she purchases the
installed facility or equipment within a fixed period of time.
Therefore, the user can not cancel the contract and has to bear a
heavy burden even if he or she does not need the facility or
equipment any more.
[0009] In the rental contract, in which the user uses the facility
or equipment by paying rental charges, the rental charge is
typically comparatively higher than the lease charge.
[0010] The lease and rental schemes described above have a problem
in that the user has to execute the contract and pay a certain
lease or rental charge in advance before the extent of the electric
power consumption saving is identified.
SUMMARY OF THE INVENTION
[0011] The present invention is directed to the problems described
above. The present invention provides an energy saving service
offering method and its apparatus for allowing the user to obtain
his or her desired energy saving service without forcing the user
wishing the energy saving service to put up any initial investment,
and for allowing the energy saving service provider to experience a
satisfactory commercial profit as well.
[0012] In accordance with the present invention, if the user hopes
for an energy saving, and the energy saving service provider
improves the existing facility of the user or installs a new
facility for the energy-saving, and then the energy saving is
attained as a result, the advantages brought about by the energy
saving are shared between the user and the energy saving service
provider by estimating the benefits of the energy saving
quantitatively. The measure of the extent of the energy saving is
based on the electric power saving, that is, the saved electricity
charge.
[0013] The present invention provides an energy saving service
offering method, which determines the present electric power
consumption of the supervised load facility of the user who owns
the supervised load facility, in which there are motors, and who is
attempting to save energy, provides inverter control operation data
when installing an inverter in the supervised load facility for
performing motor speed control, determines a merit refund
corresponding to the saved electric power consumption by referring
to the difference between the present electric power consumption
data and the inverter control operation data, and performs a
billing and charge operation based on a merit refund under the
contract conditions established between the energy saving service
provider and its contractor.
[0014] The apparatus of the present invention is characterized as
an apparatus comprising a supervisory unit for supervising the
operation status of a supervised load facility having an inverter
and a motor, a means for sending the actual operation data based on
a motor speed control operation performed by the inverter in the
supervised load facility from the supervisory unit through a
communication system, a calculation apparatus for calculating the
saved electric power consumption dependent of the difference
between the estimated value for the electric power consumption of
the load facility without inverters and the actual operation data
of the inverter, and a processor for performing a billing and
charge operation based on a merit refund under the contract
conditions established between the energy saving service provider
and its contractor.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] FIG. 1 is a schematic diagram of one embodiment of the
present invention.
[0016] FIG. 2 is a schematic diagram of another embodiment of the
present invention.
[0017] FIG. 3 is a block diagram showing one pattern for
implementing the present invention.
[0018] FIG. 4 is a block diagram showing another pattern for
implementing the present invention.
[0019] FIG. 5 is a graphical diagram showing an example of the
characteristic of the electric power consumption of the blower.
[0020] FIG. 6 is a graphical diagram showing a relation between gas
volume and electric power used as an example of the contract
condition before the, electric power consumption saving
operation.
[0021] FIG. 7 is a graphical diagram showing an example of
calculation of the effect of the electric power consumption
saving.
[0022] FIG. 8 is a flowchart showing a method representing one
embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0023] One embodiment of the present invention is directed to an
energy saving service offering method which determines the present
electric power consumption of the supervised load facility of the
user, who owns a supervised load facility, in which there are
motors, and who desires to save energy, provides inverter control
operation data when installing an inverter in the supervised load
facility for performing motor speed control, determines a merit
refund corresponding to the saved electric power consumption by
referring to the difference between the present electric power
consumption data and the inverter control operation data, and
performs a charge and billing operation based on a merit refund
under the contract conditions established between the energy saving
service provider and its contractor.
[0024] In the method according to another embodiment of the present
invention, the present electric power consumption is obtained from
the operation status of the supervised load facility having a
motor, the inverter control operation data is provided when
installing an inverter in the supervised load facility for
performing motor speed control, a merit refund corresponding to the
saved electric power consumption is calculated by referring to the
difference between the present electric power consumption data and
the inverter control operation data, and a billing and charge
operation is performed based on a merit refund under the contract
conditions established between the energy saving service provider
and its contractor.
[0025] In another method according to the present invention, the
present electric power consumption is obtained from the operation
status of the supervised load facility having a motor, an inverter
and a motor serving as replacements for the existing motor are
introduced in the supervised load facility, the inverter control
operation data is provided when performing the motor speed control
operation, a merit refund is calculated based on the present
electric power consumption and the saved electric power consumption
of the supervised load facility including the inverter, and a
contract including the allocation of the merit refund is
established between the user of the supervised load facility and
the provider of the inverter, the electric power consumption saving
data is sent to the data collection system through the
communication system, and the billing and charge operation to the
user is performed on the basis of the merit refund defined by the
contract.
[0026] The inverter control operation data is collected from the
supervisory system through a communication means, such as LAN or
telephone line. The present electric power consumption data
represents the present actual operation status of the supervised
load facility or its operation status under an assumed
condition.
[0027] Therefore, in accordance with the present invention, it will
be appreciated that the user can achieve the energy saving goal
provided by the national government or contribute to the goal
without any initial investment, and the service provider also can
share in the benefits brought about by the energy saving operation.
In accordance with this invention, because of the above-described
features, since there is no need for guaranteeing a minimum energy
saving refund to the user, unlike the lease or rental method, it
will be appreciated that the service provider certainly accepts a
merit fee in proportion to the electric power consumption
saving.
[0028] The contractor B as one of the contract parties concerned
(an energy saving service provider or an energy saving facility
manufacturer) installs a combination of an inverter and a new
motor, or an inverter by itself, into the facility of the
contractor A (client or user), who desires to achieve an energy
saving. In this case, if both the service provider and the user
reach an agreement, pumps, fans and blowers, as well as inverters
and motors, can be replaced or upgraded with new models.
[0029] The contractor A corresponds to one who wishes to receive
the energy saving service, and the contractor B corresponds to a
service provider who provides the energy saving service.
[0030] At first, the contractor B installs an operation status data
collection system at the existing facility of the contractor A and
defines a characteristic of the facility before electric power
consumption saving by using the present operation status data for
the existing facility. This characteristic is defined as the
present electric power consumption. This characteristic is a
contract condition that relates to a characteristic existing before
electric power consumption saving is achieved. In case the user
does not own the designated facility, the contract condition for
the user is assumed to be defined as electric power consumption
data of a facility of the same class owned by the service
provider.
[0031] The operation status data collection system as described
above collects the operation data of the existing facility and the
upgraded facility and/or equipment employed after modifying or
replacing any equipment, and works as one component of the remote
supervisory system constructed in conjunction with the start of the
service by using a communication means, such as telephone lines and
so on through which the data to the supervisory system is
transmitted at a necessary time interval as needed. Owing to this
configuration and procedure, it will be appreciated that the
electric power consumption of the equipment and the facility after
improvement can be obtained and that a merit refund can be
calculated.
[0032] The contractor A (user) determines whether he or she will
accept the energy saving service offered by the energy saving
service provider by considering the merit refund determined by the
present electric power consumption and the electric power
consumption saving after improvement of the facility and the
equipment, and then, in case that he or she accepts the service, he
or she executes the contract. In case the existing facility and
equipment are not improved and/or replaced, and there is existing
data for a facility of the same class, the service provider can
estimate the present electric power consumption and the merit
refund by precise calculation or approximate calculation and then
present the results to the user as prerequisite conditions for the
contract.
[0033] As for the contract conditions, it is possible to consider
the benefit obtained by reduction of the electric power
consumption, the cost for installing and replacing inverters and
motors in the existing facility, and the fee, maintenance expense
and charges for collecting the data to be paid to dealers from
which inverters and motors are leased or rented by the service
provider. If the user and the service provider agree with those
conditions, they execute the contract for providing the electric
power consumption saving system. Since the user does not pay any
initial investment for the improvement and replacement of the
facility and the equipment, and he or she accepts the system only
after confirming or identifying approximately the extent of the
prospective achievement of any energy saving, it will be
appreciated that the user can at least achieve an energy saving,
and furthermore that he or she also can get a share of the merit
refund.
[0034] More specifically, the service provider and the contractor
execute the electric power consumption saving motor drive system
introduction contract, and the service provider calculates the
refund charged for the electric power consumption saving and
determines the usage charge of the electric power consumption
saving motor drive system by referring to the predetermined rate,
and requests the user to pay the usage charge. In this context, the
term "usage charge" is determined not to be "the charge for using
the introduced facility", but to be the merit refund corresponding
to the sharing received by the contractor B as a definite fraction
of the estimated electric power consumption saving of the
contractor A.
[0035] When implementing this service, needless to say, the service
provider can select whether the service provider operates the
service by using his or her own assets or third-party, assets for
motors, inverters and the data collection equipment (hereinafter
referred to as service equipment).
[0036] According to the embodiment of the present invention, what
is provided is an energy saving service offering apparatus
comprising:
[0037] a supervisory unit for supervising the operation status
installed in the supervised load facility having an inverter and a
motor;
[0038] a means for transmitting the actual operation data based on
the speed control operation of the motor by the inverter of the
supervised load facility from the observation unit through the
communication system;
[0039] an arithmetic unit for calculating the electric power
consumption saving based on the difference between the estimated
value of the electric power consumption of the load facility
without an inverter and the actual inverter operation data; and
[0040] a processor for calculating a merit refund based on the
calculation result of the arithmetic unit, and performing the
billing and charge operation based on the merit refund under the
contract conditions established between the service provider and
its contractors.
[0041] An apparatus in another embodiment of the present invention
comprises:
[0042] an operation status data collection system having a
supervisory unit for supervising the operation status installed in
the supervised load facility having an inverter and a motor;
[0043] a means for collecting the actual operation data based on
the speed control operation of the motor by the inverter of the
supervised load facility from the observation unit;
[0044] an arithmetic unit for calculating the electric power
consumption having based on the difference between the present
operation data and the actual inverter operation data; and
[0045] an output circuit for providing the calculated result of the
arithmetic unit to LAN or a telephone line; and
[0046] a processor for calculating a merit refund based on the
calculation result of the arithmetic unit, and performing the
billing and charge operation based on the merit refund under the
contract conditions established between the service provider and
its contractors.
[0047] One embodiment of the present invention will be described
with reference to the attached drawings.
[0048] FIG. 1 is a schematic view of one embodiment of the present
invention. What is shown in FIG. 1 is that the contractor A has a
supervised load facility to be described later, and he or she
executes a designated contract (contract including the sharing of
the merit refund) with the contractor B, and the exchange of the
merit refund is transacted through a financial firm. The contract
entered into by the contractor A (user), the contractor B (service
provider) and the financial firm is designated by the arrow 14.
[0049] The supervised load facility is a facility including a fan,
a blower 1 or a pump 2 and so on, representative of equipment used
in the factory, as described above, and even though they are not
components in a major facility for production and manufacturing,
but consume a large amount of electric power, the energy saving
measures for them are relatively delayed so as to be behind
schedule. Motors 3 and 4 of all types are used as driving sources
for this facility. The users mostly desire to achieve an energy
saving by making as little investment to the facility and equipment
as possible.
[0050] The service provider measures the present electric power
consumption of the facility of the user wishing to achieve the
energy saving, or modifies its electric power consumption by
considering various variable factors, and then, estimates the
present electric power consumption of the facility. The estimated
data and calculation results are presented to the user.
[0051] Next, the service provider installs an inverter and a new
motor as a set at the individual facility of the user wishing to
achieve the energy saving. If the user wants to renew the facility,
the service provider installs a new motor, an inverter, a fan and a
blower as a set. The speed control of the motors 3 and 4 by the
inverters 5 and 6 is established by connecting the motors 3 and 4
to the inverters 5 and 6. The characteristic before the electric
power consumption saving is defined by the present electric power
consumption of the existing motor of the contractor A, which
information is collected by the supervisory unit 7. This
characteristic becomes a contract condition before the electric
power consumption saving.
[0052] The electric power consumption of the new facility and
equipment with the speed control of the motors 3 and 4 being
provided by the inverters 5 and 6 is supervised by the supervisory
unit 7 installed by the contractor B, and the inverter control
operation data is obtained as the electric power consumption. The
merit refund (electric power consumption saving) is obtained based
on this operation data and the present electric power
consumption.
[0053] Though the equipment, including the inverters 5 and 6, and
the supervisory unit 7, are delivered by the contractor B, the fee
for the delivery of this equipment is not charged and billed to the
user. The sharing of the merit refund is negotiated between the
user and the service provider according to the conditions described
above. For this negotiation, the usage fee (with a lease or rental
contract in most cases) for the inverters, motors, fans, blowers,
and pumps to be installed in the user's facility by the service
provider is considered. It is reasonable that this usage fee should
be covered by the merit refund other than charged directly to the
user.
[0054] The service provider provides operation administration and
after-sales services for the inverters 5 and 6 in addition to the
equipment delivery and installation services. This service flow is
shown by the arrow 11.
[0055] The user enters into the electric power consumption saving
motor driver system introduction contract with the service provider
which covers the merit refund for the electric power consumption
saving brought about by the speed control of inverters.
[0056] The inverter control operation data is supplied to the
remote supervisory system 200 of the contractor B as operation
status data. This data flow is shown by the arrow 13.
[0057] The contractor B calculates the electric power consumption
due to the operation of the inverters by using the remote
supervisory system 20, and estimates and determines the usage fee
for the electric power consumption saving motor drive system based
on a predefined rate, and performs charge and billing operations.
The benefits obtained by the energy saving is shared between the
contractor A and the contractor B based on a predetermined rate
(payback rate). Since the energy saving contributed by the limited
supervised equipment (fans, blowers and pumps) is subject to the
operation status of the production line including that equipment,
this energy saving is not covered in this contract. Thus, in this
contract, only the merit corresponding to "the fraction of the
energy saving over and above a definite saving level" is not
shared, but the merit is shared with a payback rate independent of
the total energy saving. In accordance with this invention, the
allocation of the merit refund to the service provider likely may
be larger than that for the contractor A, and thus, the merit
refund to the contractor A vanishes in some cases.
[0058] The estimated amount of the merit refund is communicated to
the contractor A by the contractor B. This notification is shown by
the arrow 12. The charge and billing operations may be mediated by
a financial institute such as financial firm of the type often used
for money payment transactions. In this case, the contract for the
intermediate service between the contractor A and the financial
firm is established as shown by the arrow 14. The notification of
the merit refund is also provided from the contractor B to the
financial firm. This notification is shown by the arrow 15.
[0059] It may be that the contractor B sells motors and inverters
manufactured by itself to the financial firm, which leases them to
the contractor B, and then, the contractor B delivers and installs
those motors and inverters at the facility of the contractor A.
[0060] According to the notification of the merit refund, the merit
refund is paid from the contractor A to the contractor B, as
mediated by the financial firm. This money flow is shown by the
arrows 16 and 17. It is possible to ask a financial institute, such
as banks and/or another institute, such as post offices and
convenience stores, to perform the charge collection service,
rather than have the financial firm perform this service.
[0061] A case in which the contract is established directly between
the contractor A and the contractor B is shown in FIG. 2, which is
substantially equivalent to the case shown in FIG. 1, so that the
details thereof are not described here.
[0062] The service equipment including motors, inverters and the
supervisory unit are those owned by the contractor B itself or
those leased or rented by the contractors, and are initially
invested or installed at the factory of the contractor A. It is
possible for the fee for their installation work and modification
of the existing facility of the contractor A to be defined in
another contract.
[0063] The contractor A operates the supervised load facility with
the inverter speed control optimized for his or her operation. FIG.
3 shows a method of collecting the electric power consumption data
before the electric power consumption saving operation.
[0064] In FIG. 3, the driver motor (IM) 32 is connected to the
supervised load facility 31 on the system 30, and the electric
current and voltage are measured with the ampere meter (CT) 33 and
the voltmeter (VT) 34 installed in the lines connected to the motor
32. The loads including flow volume and pressure are detected from
the supervised load facility 31. Those measured and detected
signals are supplied to the supervisory unit 25 (supervisory
system) of the operation status data collection system 22.
[0065] The present operation data is calculated based on the data
collected and processed statistically, and the computation results
are transferred to the arithmetic unit (PC) 26.
[0066] The operation status data collection system 22, as described
above, collects and processes statistically the operation status of
the supervised load facility 31 as the present operation data, and
collects and processes statistically the actual operation data of
inverters operated with speed control by the inverter. The present
operation data is the operation data based on either the present
actual operation status or the present estimated operation status
of the supervised load facility 31.
[0067] The operation status data collection system 22 is composed
of the supervisory system 24 (including the supervisory, unit 25)
for collecting the actual inverter operation data, the arithmetic
unit (PC) 26 for processing statistically the actual inverter
operation data, and the communication system 27 transmitting the
integrated electric power data to the contractor B.
[0068] The calculation results are transmitted to the contractor B
via email through the communication system 27, for example, via the
modem 35 or LAN 36 of the contractor A. Though it is sufficient
that the transmission of data is automated to be carried out once a
day, it is possible to transmit the data any time. This data
collection operation is performed by using the remote supervisory
system 200 owned by the contractor B, as shown in FIG. 1 or FIG.
2.
[0069] The present operation data is transferred to the data
processor in the remote supervisory system 20 and is stored in the
memory apparatus 23.
[0070] FIG. 4 shows a method of collecting the actual operation
data (actual inverter operation data) in case of installing
inverters INV into the system and performing speed control. The
components identical to those in FIG. 3 are identified by like
numerals, and their description will not be repeated.
[0071] In the example shown in FIG. 4, inverters (INV) 5 and 6 are
installed on the system 30, in addition to the electric current
meter 33 and voltmeter 34 provided upstream of the inverters 5 and
6. Also, an electric current meter 43 and a voltmeter 44 are newly
installed downstream of the inverters 5 and 6.
[0072] The electric current and voltage measured by the electric
current meters 33 and 43, and the voltmeters 34 and 44, are
transmitted to the supervisory unit 25 of the supervisory system.
In addition, the loads including flow volume and the pressure of
the supervised load facility 31 are similarly transmitted to the
supervisory unit 25. In this case, it is possible to detect the
temperature and vibration of the supervised load facility
additionally and to transmit this data to the supervisory unit 25.
Those detected values are used for maintenance later.
[0073] The electric power consumption is integrated based on the
collection, statistical processing and/or calculation of the actual
operation data. The integration results are transferred to the
contractor B through the communication system 27. Though it is
sufficient that the transmission of data is automated so as to be
carried out once a day, it is possible to transmit the data any
time.
[0074] This information collection is performed by using the remote
supervisory system 200 owned by the contractor B, as shown in FIG.
1 or FIG. 2.
[0075] The electric power saving and the merit refund obtained can
be calculated promptly based on the transmitted operation data,
that is, the electric power consumption at the data processor 21
owned by the contractor B. The same results can be obtained by
installing the memory apparatus 23 in the operation status data
collection system 22, and by transmitting the results to the data
processor 21. The computation results are communicated to the
contractor A. In addition, it is possible for the merit refund to
be calculated by the operation status data collection system 22. In
view of the system configuration, it is preferable to use the
remote supervisory system 20 to transmit the computation results of
the merit refund and certain operation data to the contractor B.
Owing to this configuration, the operation management by the remote
supervisory system 20 can be established.
[0076] FIG. 5 shows an example of the electric power consumption
characteristic in case of applying a blower to the supervised load
facility 31. In FIG. 5, the characteristic (1) shows the electric
power consumption (%) relative to the flow volume (%) in case of
the present intake damper control. The characteristic (1) is
defined as the collected present operation status data and is used
for the contract condition.
[0077] The characteristic (2) shows the electric power consumption
(%) relative to the flow volume (%) in case of employing speed
control by inverters in place of intake damper control. The
characteristic (2) becomes the actual operation data in the case of
speed control by the inverters. The electric power saving is
calculated by substituting the characteristic (2) for the
characteristic (1).
[0078] Though what is described in the above example is related to
blowers, the electric power consumption saving associated with
other equipment, such as fans and pumps, can be calculated
similarly.
[0079] As described above, the parameters (for example, gas volume,
flow volume and so on) which characterize the facility operation
status and corresponding electric power consumption are measured by
the operation status data collection system 22. The contract
condition curve before the electric power consumption saving
operation, as shown in FIG. 6, is generated from the measurement
results, and is made to be a contract condition. FIG. 6 shows a
relation between the gas volume (%) and the electric power in KW,
and provides an example of the contract condition before the
electric power consumption saving operation.
[0080] FIG. 7 shows an example of the effect of the electric power
consumption saving. The parameters (for example, gas volume, flow
volume and so on) showing the facility operation status and
corresponding electric power consumption are measured by the remote
supervisory system 20. The effect of the electric power consumption
saving is calculated by referring to the measurement results and
the contract condition curve before the electric power consumption
saving operation, as shown in FIG. 7. FIG. 7 shows an integrated
electric power KWh at each time point. In FIG. 7, the integrated
electric power before the electric power consumption saving
operation calculated from the curve when starting the contract is
processed statistically, and next, the integrated electric power
during the electric power consumption saving operation is in no
time processed statistically, and then, the daily effect of the
electric power consumption saving is calculated on the basis of the
difference between them at the end of a day.
[0081] The merit refund is calculated from the effect of the
electric power consumption saving, that is, the amount of the
electric power consumption saving multiplied by a unit power rate,
and the charge and billing processing is performed by reflecting
the merit refund according to the contract agreed upon by the
contractors A and B, as well as the financial firm as the case may
be. From the view point of the contractor A, this transaction is
translated to establish the process for charging the fee to him or
her.
[0082] A fraction, for example, half of the merit of the electric
power consumption saving due to the operation of the newly
installed facility is paid as a merit refund to the contractor B.
This means that the merit refund is paid later, after the effect of
the energy saving has been established. The merit of the electric
power consumption saving is calculated from the actual operation
data by the contractor B in accordance with the contract agreed
upon between the contractors, based on information communicated to
the contractor A monthly. It is possible for the operation data
used before charge and billing processing is performed by the
contractor B to be reviewed by the contractor B. So far, the charge
and billing processes based on the merit refund have been
performed. As for the maintenance of the facility, it is possible
for the contractor B to provide maintenance services free of
charge, and for the daily inspection to depend on the contractor
A.
[0083] FIG. 8 is a flow chart showing the charge and billing
process. As shown in FIG. 8, the flow of the charge and billing
process includes a preliminary investigation using a marketing
approach (SI), and the proposal for the offer of service from the
contractor A to the contractor B is presented after obtaining the
application from the contractor A (S2). The commercial profit is
examined on the basis of field research on the facility of the
contractor A (S3). The operation status data is collected by
collecting the present operation status data (S4). The data
collection continues, for example, for two months, and the data
analysis, the final commercial profit study, and the presentation
of the contract conditions are then performed (S5). The contract
for using the facility is executed (S6), and the hardware
installation is done, (S8) by installing equipment in the facility,
including motors and inverters (S8). In operating the installed
facility, further operation status data is collected by collecting
the actual operation data (S9). The calculation of the merit, the
notification of the merit, and the charge and billing process are
performed by referring to the collected operation status data (SI0)
Finally, the after-sales service is provided (S11).
[0084] According to this embodiment, the merit for the contractor A
(user) includes the following items.
(1) The contractor A can achieve an energy saving of the electric
power at a facility having motors. (2) The contractor A can achieve
the energy saving without any initial investment. (3) The
contractor A can execute the contract after verifying the effect of
the electric power consumption saving, and so he or she does not
need to make an ineffective investment. (4) The contractor A can
operate the facility in an electric power consumption saving mode,
and he or she can save the operation cost of the facility.
[0085] The merit for the contractor B (service provider) includes
the following items.
(1) The contractor B can ensure an income by sharing the fraction
of the merit refund. (2) The contractor B can develop a new retail
market for motors and inverters. (3) The contractor B can make it
easier to manage the operation at the facility of the contractor A
and reduce its management cost by employing a remote supervisory
system.
[0086] According to the energy saving service offering method and
apparatus of the present invention, as described above, it will be
appreciated that the user can achieve an energy saving as his or
her commitment without any initial investment, and that the service
provider can obtain a share of the merit refund associated with the
energy saving.
* * * * *