JP2002276529A - Supply service of power generating facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a supply service of a power generating facility capable of reducing load of a city water company in installing the power generating facility to a city water facility. SOLUTION: The hydraulic power generating facility for generating power using water flowing through a conducting tube in the city water facility possessed by the city water company is supplied to the city water company, and installation cost of the power generating facility is collected by receiving a counter value from the city water company depending on an electric energy generated by the hydraulic power generating facility.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generation facility providing service for providing power generation facilities for generating power in a water supply facility owned by a water supply company.

[0002]

2. Description of the Related Art In general water supply facilities, various treatments such as sedimentation, filtration, and disinfection are performed by various water purification devices of a water purification plant in order to make raw water taken from a water source into water quality suitable for drinking. The water treated by the water purification device is sent to distribution reservoirs provided in various places via a water purification reservoir in a water purification plant, and is sent from the reservoir to consumers such as ordinary households. Water transmission from this water purification device to the water purification reservoir and water transmission from the water purification reservoir to the distribution reservoir are as follows:
It is performed by natural fall using the height difference of natural terrain or by pumping by a pump. It should be noted that a pressure reducing valve is provided at the inlet side pipe of the water purification reservoir or the distribution reservoir, and the flow rate adjustment and the water pressure control are performed by adjusting the opening degree of the pressure reducing valve.

[0003]

As described above, in a conventional water supply facility, the flow rate and pressure of water are regulated by a pressure reducing valve. However, the energy of water lost by the pressure reducing valve is released without being used. I have. By using this unused energy for power generation, it is possible to operate water supply facilities efficiently, but it takes time and labor for operation and maintenance to introduce facilities for power generation. Therefore, water utilities could not easily introduce power generation equipment.

An object of the present invention is to provide a power generation facility providing service capable of reducing a burden on a water supply company when introducing the power generation facility into a water supply facility.

[0005]

A feature of the present invention to achieve the above object is to provide a water utility with a hydroelectric power generation facility for generating electricity using water flowing through a water pipe in a water facility owned by the water utility. And receiving compensation from the water utility according to the amount of power generated by the hydroelectric power generation facility.

[0006] In consideration of the provision of the hydroelectric power generation equipment, the amount corresponding to the amount of power generation is received from the water utility, and the installation cost of the power generation equipment can be recovered, thereby reducing the cost paid by the water utility when introducing the power generation equipment. it can. Therefore, it is possible to reduce the burden on the water supply company when introducing the power generation equipment into the water supply facility.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A power generation facility providing service according to a preferred embodiment of the present invention will be described. FIG. 1 shows a configuration of a system for realizing the power generation facility providing service of the present embodiment, and FIG. 2 shows a sequence of the present embodiment.

[0008] The system shown in FIG. 1 is a system having a power generation facility for generating power by utilizing a height difference in a water purification plant in a water purification plant which supplies water from a water purification reservoir to a distribution reservoir by natural fall. At a place where a sufficient head is obtained in the water purification plant, a bypass pipe 11d is provided from the water purification reservoir 10 to the water conduit 11a of the distribution reservoir 13, the electric valve 11b on the existing water conduit 11a is closed, and the electric valve on the bypass pipe 11d is closed. Opening 11c allows tap water to pass through bypass pipe 11d. The motor-operated valve 11e is a check valve for preventing backflow.

A water wheel 12a is installed on the bypass pipe 11d, and power is generated by a water flow flowing through the bypass pipe 11d by a generator 12b. Conventionally, an electric valve (pressure reducing valve) 11b
The water pressure adjusted by the above-described method is reduced by discharging energy through the water turbine 12a for power generation. As described above, by installing the power generation equipment using the water turbine 12a, the energy that has been conventionally discharged ineffectively by the pressure reducing valve can be recovered by the hydraulic power generation by the water turbine 12a, and the energy can be effectively used. In addition, since hydroelectric power does not generate carbon dioxide during power generation, there is no adverse effect on the surrounding environment. The motor operated valve (bypass valve) is used when water is supplied at the maximum pressure or during maintenance of power generation equipment.
11c is closed and water is supplied by the water pipe 11a.

In the present embodiment, when introducing the above-described power generation equipment including the water turbine 12a and the generator 12b, the water supply company that owns the water purification plant and the installation / management company that installs and manages the power generation equipment are required. The procedure shown in FIG. 2 is performed. First, the two parties exchange details of the contract period and contract conditions, and after the contract is concluded, the installation / management company performs installation work on the power generation equipment. The installation work is installation of the bypass pipe 11d and installation of other auxiliary equipment necessary for power generation. The construction cost at this time will be borne by the installation / management company.

After the installation work is completed, hydroelectric power generation in the water treatment plant is started. The installed power generation equipment is managed and maintained by an installation / management company, and generates power at a rated power throughout the year.
The installation / management company installs a power generation facility on the site of the water treatment plant and measures the amount of power generated by the power generation facility.
and a communication facility 14a for periodically notifying the computer 15 of the installation / management company of the measured power generation amount. The amount of power generated by the water turbine 12a and the generator 12b measured by the measuring device 12c is automatically transmitted from the communication facility 14a to the computer 15 of the installation / management company via the public line and the communication facility 14b. The electric power generated by the generator 12b is used as a drive source for electric equipment in the water purification plant. The power that cannot be supplied by the hydroelectric power generation in the water treatment plant will be purchased from an external power source such as a power company. The amount of power generated by this hydroelectric power generation is the amount of power saving, which is a benefit to water utilities by introducing power generation equipment. In addition, the operation of the power generation equipment is either performed by the water supply company itself or automatically operated by a controller installed by an installation / management company. Further, the installation / management company may remotely control the operation of the power generation facility using the communication facilities 14a and 14b and the public line. However, in the case of remote control, since the public line is used, the communication equipment 14a, 14
b. An encryption and authentication function for eliminating an unauthorized control command is incorporated and used.

The calculation of the profit from power generation is U × W yen based on the unit price U [yen / kWhr] of the power when power is purchased from the outside and the power generation amount W [kWhr]. The unit price of power is determined at the time of contract. For example, if a generator with an output of 300 kW is installed and rated for 8000 hours per year,
Assuming that the annual power generation amount W is 2400 MWHr and the unit price U of power purchase is 10 yen / kWhr, the annual profit is 24
It will be one million yen. This profit will be distributed between the water utility and the installation / management company according to the terms of the contract. The installation / management company periodically records the amount of power generation accumulated in the computer 15 of the company via the communication device 14b and calculates the amount to be distributed to the company in accordance with the distribution method determined at the time of the contract. At 16, a predetermined bill is issued and billed to the water utility. Water utilities account for each year or period,
Pay the bill to the installation / management company.

The bill is, for example, a form as shown in FIG.
The transition of the power generation during the billing period, the total power generation, and the contracted power purchase unit price are shown as the basis for calculation. In the example of FIG. 3, the distribution rate is determined at the time of contract, and the water utility pays a certain percentage of the profit from the power generation to the installation / management company until the contract period expires. The installation / management company covers the installed power generation equipment, its construction costs, and equipment management costs during the contract period with the profits from the distributed power generation.

By making such a contract, the water utility can introduce the hydroelectric power generation equipment without having to procure the initial investment necessary for the introduction of the power generation equipment. In addition, even if it is difficult to secure a large budget in a single year, payment can be made within the profit of power generation without being directly affected by interest rate fluctuations when raising funds for introduction.
It is possible to introduce power generation equipment that can make effective use of the energy that has been released and can achieve cost savings by saving purchased power. On the other hand, the installation / management company has a wide range of sales channels to water utilities and can obtain a stable contract for the management of power generation facilities. In addition, since profits from hydropower generation are distributed at a fixed rate, the installation / management company can improve profits by maintaining the operation rate of the power generation equipment higher.

FIG. 4 shows an example of a bill according to another distribution method. In this case, a fixed amount frame is set as the maximum amount of payment to the installation / management company at the time of the contract, and if the profit amount exceeds the fixed amount frame, the entire fixed amount frame is set, and if the profit amount is less than the fixed amount, Means that the entire profit is the share of the installation / management company.
In addition, in the case of profits exceeding the fixed amount frame, all amounts exceeding the fixed amount frame will be taken by the water supply company. In this way, by setting a fixed amount frame, the water utility can record a fixed amount in the budget for each year as the expected payment amount,
In addition, the installation / management company can obtain a fixed amount of income regardless of a change in the total power generation as long as the operation rate is equal to or higher than a certain level.

As another method of distributing profits, a method of distributing profits exceeding a fixed amount at a fixed rate may be used. The fixed amount is guaranteed for the amortization of installation and management company equipment and construction costs, and a portion of the profit exceeding the fixed amount is distributed to the installation and management company. In this case, the improvement of the operation rate always benefits both parties.

In addition, there is a method of determining a unit price of electric power as a basis for calculating profits at the time of contract, but a unit price of power purchase in each month at the time of purchasing insufficient power in hydroelectric power generation can be used as it is. The method of reflecting may be used. In the case where a hydroelectric power generation facility capable of covering all the electric power in the water supply facility is provided, the cost of the electric power generated by the hydroelectric power generation may be set as the power unit price. Further, when the amount of power generation exceeds the amount of power consumed by the electric equipment in the water purification plant, it is possible to sell the power to a third party.

In this embodiment, a bypass pipe 11d is provided in a water conveyance pipe 11a between the water purification tank 10 and the distribution reservoir 13 so that the water turbine 1
Although 2a is installed, it is sufficient that a head or water pressure effective for power generation is obtained as an installation location, and a bypass pipe may be provided in a water pipe from a water purification facility to a water purification plant. Also, not only when water is supplied by natural fall,
Even in the case where the pumping is performed, the water turbine power generation equipment can be introduced with the same configuration. In particular, when it is difficult to adjust the pressure by adjusting the water supply pump side, for example, if the water supply path is long, if the topology of the pipeline leading to the reservoir changes, it is necessary to provide a pressure reducing valve in front of the reservoir, Instead of ineffectively releasing energy with a pressure reducing valve, a water turbine can be installed to generate hydroelectric power. In this case, the power generation equipment is placed on the site of the water distribution station and used as a power source for operating the electric equipment at the water distribution station.

FIG. 5 shows a method of selecting a contract form after the contract period has expired. Generally, in the case of hydroelectric power generation, the life of the turbine itself is 30 years or more, and even if the contract period is 5 years, it can be used for 25 years or more thereafter. Therefore, after the expiration of the contract period, if the water utility renews the contract in the same form, the distribution ratio of the profit from the power generation is newly set (step 50), and the installation / management company continues to manage the power generation equipment. Then, profits are distributed as profits from the power generation as lending, management, and maintenance costs of the power generation equipment. In addition, once the contract is canceled, the installed power generation facilities are generally purchased by the water utility, but if not, the water utilities will pay the removal cost and remove the equipment. The purchase price of the power generation equipment at the end of the contract period is calculated based on the amount that could not be amortized within the contract period. The installation / management company can also undertake a maintenance contract for the power generation equipment purchased by the water utility, in return for the distribution of profits from power generation, as at the time of introduction. In this case, since the power generation equipment is owned by the water utility, the profit of the power generation is distributed as compensation for the maintenance of the equipment. If a maintenance contract is not made in the form of distribution of the power generation profit, the installation / management company removes the measuring instrument 12c and the communication equipment 14a for monitoring / recording the power generation amount, and communicates with the company via a public line. Close communication paths between

FIG. 6 shows a sequence of a power generation facility providing service according to another embodiment of the present invention. The installation / management company solicits investment from customers receiving tap water from a water utility and raises some or all of the funds for the introduction of power generation equipment. Based on the procured funds, installation of hydroelectric power generation facilities will be performed in facilities such as water purification plants of water utilities to generate power. The installation / management company calculates the measured amount of power generation and the resulting savings in electricity costs, issues a bill, for example, as shown in FIG. 7, and requests the water utility to distribute the profits from the power generation. In the example of FIG. 7, the installation / management company bills the water utility for the amount obtained by subtracting the usage fee for the water purification plant in which the power generation equipment is installed from the amount of electricity saved by the power generation.

On the other hand, for the customer who provided the fund,
The installation / management company first calculates the power generation results of the introduced hydroelectric power generation facilities and the effects thereof, and issues a notice, for example, as shown in FIG. The effect of hydropower generation is calculated as the effect of reducing electricity costs, as in the case of bills for water utilities, but at the same time, the same amount of power was generated using thermal power generation and other methods of generating carbon dioxide. The environmental load reduction effect such as the carbon dioxide emission reduction effect is also calculated and notified to the investor. From the profits of hydroelectric power paid by water utilities, amortization of power generation facilities, repayment of funds procured except for investment from customers,
The amount obtained by subtracting the cost of operating, managing, and maintaining the power generation equipment and the cost of paperwork is the profit of the investor. This profit is distributed according to the investment amount. When the contract period expires, the water supply company or the installation / management company purchases the power generation equipment, distributes the assets excluding the expenses required for construction and the like to the consumers according to the investment amount, and liquidates the business.

In this embodiment, profits are distributed to consumers who have made an investment, but as another form, the investment purpose of the customers is limited to reducing the environmental load through effective use of energy rather than collection of funds by power generation. However, instead of distributing profits according to the amount of investment, it is also conceivable to make a contract that uses local governments to finance the environment.

[0023]

According to the present invention, it is possible to reduce the burden on a water supply company when introducing a power generation facility into a water supply facility.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a system for realizing a power generation facility providing service according to a preferred embodiment of the present invention.

FIG. 2 is a diagram showing a sequence of the embodiment of FIG. 1;

FIG. 3 is a diagram showing an example of a bill.

FIG. 4 is a diagram showing an example of a bill.

FIG. 5 is a diagram showing a flow of processing after expiration of a contract period in the embodiment of FIG. 1;

FIG. 6 is a diagram showing a sequence of a power generation facility providing service according to another embodiment of the present invention.

FIG. 7 is a diagram showing an example of a bill.

FIG. 8 is a diagram showing an example of an effect notice.

[Explanation of symbols]

10 ... water purifier, 11a ... water pipe, 11b, 11c, 11
e: electric valve, 11d: bypass pipe, 12a: water turbine, 1
2b: generator, 12c: measuring instrument, 13: reservoir, 14
a, 14b: communication equipment, 15: computer, 16: output device.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Yoshiki Noguchi 3-1-1, Sachimachi, Hitachi, Ibaraki Pref. Hitachi, Ltd. Thermal and Hydro Power Division (72) Inventor Satoshi Kusaka Sachimachi, Hitachi, Ibaraki 3-1-1, Hitachi, Ltd. Thermal and Hydro Power Division (72) Inventor Akihiko Yamada 7-2-1, Omika-cho, Hitachi City, Ibaraki Pref. Hitachi, Ltd., Electric Power and Electrical Development Laboratory (72) Invention Person Koji Oga 7-2-1, Omika-cho, Hitachi City, Ibaraki Prefecture F-term in the Electric Power and Electricity Development Laboratory, Hitachi, Ltd. 3H074 AA12 BB10 BB15 BB19 CC11 CC43 CC50

Claims (7)

[Claims] The present invention provides a water power company with a hydroelectric power generation facility for generating electricity by using water flowing through a water pipe in a water facility owned by the water service company, and the water power plant is provided with the water power generation facility according to the amount of power generated by the hydropower facility. A power generation facility providing service characterized by receiving consideration from a water utility. 2. The power generation equipment providing service according to claim 1, wherein the price is obtained by dividing a profit obtained by multiplying the electric energy by an electric power unit price according to a preset distribution ratio. 3. The method according to claim 1, wherein the price is a fixed amount when a profit obtained by multiplying the power amount by a power unit price exceeds a predetermined fixed amount, and the profit amount obtained by multiplying the power amount by the power unit price is calculated. 2. The power generation facility providing service according to claim 1, wherein the profit is set as the profit when the amount is equal to or less than a predetermined fixed amount. 4. The method according to claim 1, wherein a bill including the amount of the consideration, the transition of the amount of electric power, and the profit is sent to the water utility every predetermined period.
The power generation facility providing service according to any of the above. 5. A method for collecting funds for installing a hydroelectric power generation facility from a customer who uses water supplied from the water supply company, and returning a part of the consideration to the customer. The power generation facility providing service according to claim 1. 6. A water turbine installed in a water pipe in a water supply facility,
A generator connected to the turbine to generate power by rotation of the turbine, a measuring device for measuring the amount of power generated by the generator, and a power set in advance to a value of the power amount measured by the measuring device A power generation system comprising: a calculator for calculating a profit amount by multiplying a unit price. 7. The power generation system according to claim 6, wherein the electric power generated by said power generator is used as a drive source for electrical equipment in said water supply facility.