JPH07238866A - Cogeneration system - Google Patents

Abstract

PURPOSE:To supply hot water in a hot water storing tank from a hot water supply pipe and enable the utilization of the heat of the hot water in the hot water storing tank by supplying clean water as cooling water into a water jacket of a reused engine to supply the hot water heated in the water jacket to the hot water storing tank. CONSTITUTION:A reused engine 1 recovered from a scrapped automobile is remodelled so that it can be driven with town gas or propane gas as fuel. A gas piping 2 for supplying the town gas to the reused engine 1 and a water jacket 3 around a cylinder in the engine 1 are provided. Also, a clean water branching pipe 4 branched from a clean water supply pipe 11 to supply the clean water through a valve 5 into the water jacket 3 and a generator G connected to a drive shaft of the output shaft of the engine 1 are provided. Further, an exhaust pipe 8 of th engine 1 provided with a radiator fin 9 is inserted into the hot water storing tank 7. Thus, the hot water heated in the water jacket 3 is supplied to the hot water storing tank 7 so that the hot water in the hot water storing tank 7 and the heat of the hot water are utilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cogeneration system in which electric power and heat are supplied in a unit such as a home by using a reusable engine taken out from an abandoned automobile or motorcycle.

[0002]

2. Description of the Related Art Conventionally, heat energy obtained by burning a fuel is used to drive a generator to recover electric power, and the generated heat is converted into steam or hot water to be used for heating or hot water supply. The cogeneration system
It is used in some consumer and industrial areas to improve the efficiency of energy use.

As engines used in such areas, diesel engines and gas engines are generally used, and these engines are designed and designed according to their unique purpose of use, and generally have a large power generation capacity and are new. Is made.

[0004]

However, in such a conventional cogeneration system, since a special engine type engine is uniquely designed and manufactured, a large number of engines of the same standard are manufactured. Therefore, there is a problem in that it is not possible to obtain it, and therefore, in addition to increasing the price, it is still difficult to introduce it into ordinary households from the viewpoint of structure and economy.

When an engine using ordinary diesel oil or gasoline as a fuel is used in a cogeneration system, a fuel container, a heat exchanger for heat recovery, a special hot water storage tank for storing recovered heat, and piping. There was a problem that it was necessary to install new equipment, and it was very expensive.

[0006] On the other hand, today, the reuse of waste treated as garbage has been emphasized from the viewpoint of resource saving and nature conservation, and automobiles equipped with reusable engines are scrapped and discarded. There was a problem that it was thrown away on the street or in the mountains without being scrapped.

The present invention has been made by paying attention to the problems as described above, and by reusing the engine of a car that has been scrapped as described above, electric power is generated at each home.
Another object of the present invention is to provide a cogeneration system that can realize heat recovery easily and at low cost.

[0008]

DISCLOSURE OF THE INVENTION The gist of the present invention is to store a reusable engine driven by city gas or propane gas supplied through a gas pipe and a clean water supplied from a water supply, and An exhaust pipe of the reusable engine is inserted into the inside thereof, and a hot water storage tank for supplying hot water heated by exhaust heat discharged through the exhaust pipe and a generator driven by the reusable engine are provided. In the cogeneration system, the clean water is supplied as cooling water into the water jacket of the utilization engine, and the hot water heated in the water jacket is supplied to the hot water storage tank.

Another object of the present invention is to store a reuse engine driven by city gas or propane gas supplied through a gas pipe as fuel, and to store the water supplied from the water supply, and to reuse the reused water. The reusable engine includes a hot water storage tank for inserting an exhaust pipe of the engine into the inside thereof and supplying hot water heated by exhaust heat discharged through the exhaust pipe, and a generator driven by the reusable engine. In the cogeneration system, the clean water previously stored in the water jacket is circulated as cooling water, and a part of the circulation path is inserted into the hot water storage tank.

[0010]

In the cogeneration system according to the present invention, a reusable engine taken out from a scrapped motorcycle or automobile becomes a reusable engine that can be driven by city gas or propane gas, and is used as a fuel supply system for the reusable engine. Supplies gas through household gas pipes, supplies water to the cooling water jacket from the water supply as cooling water, generates power from the generator connected to the reusable engine, and supplies water to the inside of the water jacket. The hot water heated at is supplied to the hot water in the hot water tank heated by the exhaust pipe of the reusable engine.
Therefore, high-temperature hot water can be supplied from the hot water storage tank, and can be used for heating as needed.

The clean water previously stored in the water jacket of the cooling system is circulated as cooling water through a circulation path partially inserted in the hot water storage tank. At this time, the circulating tap water is heated in the water jacket and exchanges heat with the tap water stored in the hot water tank. Thus, heat is supplied to the tap water in the hot water storage tank, and as described above, therefore, hot water can be supplied from the hot water storage tank and can be used for heating as required.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a reusable engine recovered from a scrapped vehicle, which is partially modified to a structure that can be driven by using, for example, city gas or propane gas.

For example, the fuel system is replaced with a gas fuel specification and repaired, a high-pressure pressure reducing valve, a gas carburetor, a gas hose, etc. are prepared separately, and the compression ratio of the air-fuel mixture in the cylinder and the ignition timing are newly added. Set.

Reference numeral 2 denotes a gas pipe arranged to supply the city gas or propane gas described above to the reusable engine 1.
Is a water jacket provided around the cylinder in the reusable engine 1, 4 is a water supply branch pipe which branches from a water supply pipe 11 described later and supplies water into the water jacket 3 via a valve 5, G is a generator connected to the drive shaft that is the output shaft of the reuse engine 1.

Reference numeral 6 denotes an engine cover for housing the generator G and the reusable engine 1, which is made of a shaped steel and an iron plate, and on which an airtight hot water storage tank 7 is installed. . This hot water storage tank 7 is, for example, FR
For example, a waterproof sheet 7c is laid in a container 7a made of a reinforced plastic material such as P via a heat insulating material 7b such as urethane foam, and its capacity is, for example, the amount of hot water used by one household per day (for example, , 300-400 liters).

A part of the exhaust pipe 8 of the reusable engine 1 is inserted into the hot water storage tank 7 so as to face the outer peripheral surface of the exhaust pipe 8 which faces the hot water storage tank 7 for heat exchange. The heat radiation fins 9 are provided. A silencer 10 for noise reduction is attached to the tip of the exhaust pipe 8 outside the hot water storage tank 7.

On the other hand, the tap water supply pipe 11 has a valve 12
It is guided into the hot water storage tank 7 through the, and the tip end portion thereof is extended to the vicinity of the exhaust pipe 8.

Further, at the upper part of the reusable engine 1, a hot water discharge port 13 leading to the water jacket 3 is introduced.
Is provided, one end of a hot water supply pipe 14 is connected to the hot water discharge port 13, and the other end of the hot water supply pipe 14 faces the upper part in the hot water storage tank 7.

Here, 15 is hot water, and the clean water supply pipe 1
The hot water supplied from 1 is warmed by using the exhaust heat of the exhaust gas passing through the exhaust pipe 8, and the water jacket 3 cools the cylinders of the engine body and the like to exchange high temperature heat. It consists of both hot water. Here, the clean water supplied from the clean water supply pipe 11 and the warm water supplied from the water jacket 3 are adjusted by the valves 5 and 12 so as to be appropriate amounts that do not exceed the capacity of the hot water tank 7. In addition, the proper temperature can be obtained at the same time.

A hot water supply pipe 16 is provided above the hot water storage tank 7.
Is provided so that one end of the hot water supply pipe 16 faces the other end of the hot water supply tank 7, and the hot water supply facility (not shown) such as a washroom, a bathroom, or a kitchen is guided through the valve 18 to the outside of the hot water storage tank 7. It is connected to the stopper.

In the middle of the hot water supply pipe 16 connecting the pump 17 and the valve 18, there is a pressure for preventing the hot water in the hot water storage tank 7 from expanding due to the recovered heat and the pressure in the hot water storage tank 7 becoming excessive. A relief valve 19 is provided and is operated or operated to open at a set pressure.

Further, one end of a drain pipe 21 having a valve 20 for draining water is connected to the lower portion of the hot water storage tank 7.

Next, another cogeneration system B obtained by improving the above-mentioned cogeneration system A.
Will be described with reference to FIG.

In this system B, the clean water branch pipe 4 of the system A, which is branched from the clean water supply pipe 11, is first changed to a clean water supply pipe 22 that directly communicates from the water supply to the hot water storage tank, and also communicates with the water jacket 3. The hot water supply pipe 14 of the system A connected to the hot water discharge port 13
The circulation pipe 23 that circulates the hot water discharged from the tank as cooling water again is used. A part of the circulation pipe 23 is inserted into the hot water storage tank 7, and a heat exchanger 24 for exchanging heat with the unheated clean water in the hot water storage tank 7 is provided in the insertion portion.

In addition, a heating pipe 25 that heats the clean water and enables it to be used for heating is inserted in the hot water storage tank 7, and a heat exchanger 26 similar to the heat exchanger 24 is inserted in this insertion portion. Is provided, whereby the clean water passing through the heating pipe 25 is heat-exchanged with the warm water warmed in the hot water storage tank 7 so that the room can be used for floor heating and the like.

Since the other members in this system B are the same as those in the above-mentioned system A, the same reference numerals are given to avoid duplicate explanation.

FIG. 3 is a conceptual diagram showing a situation in which the cogeneration system B having the above structure is installed in one house. According to this figure, one end of the hot water supply pipe 16 is connected to the bathtub water supply shower 30 in the bathroom, and the generator G includes the internal power switch 31 and the linkage protection device 3.
6, and a breaker 37 are electrically connected to a light 32, an air conditioner 33, a telephone fax 34, a television 35, etc. in each room so that power can be supplied.

The outdoor switch 4 provided on the outer wall of the house
0 indicates each of the weighing devices 38 for power sale and power purchase, and 3
An external electric power line 41 is connected via 9 and electric power can be supplied from the outdoor switch 40 to the electric light 32, the air conditioner 33 and the like via a service line 42 and a breaker 43.

This operation will be described in more detail.
First, in the cogeneration system B of FIG. 2, a predetermined amount of clean water used as hot water in the hot water storage tank 7 (for example, the exhaust pipe 9
In a state in which the gas is stored sufficiently, the reusable engine 1 is supplied with city gas or propane gas, for example, by opening a gas plug (not shown). At this time, the supply amount of propane gas is adjusted by operating the throttle lever. Further, by igniting and exploding the propane gas introduced into the cylinder by the ignition device, the piston is operated and the reusable engine 1 is driven in a known cycle.

When the temperature of the cylinder rises due to the driving of the reusable engine 1, the clean water stored in the water jacket 3 enclosing the cylinder is heated to become warm water, and the temperature of this warm water gradually rises. Then, when the engine body is sufficiently heated by the combustion heat of gas, the pump 27 is started to heat the clean water in the hot water storage tank 7 by the heat exchanger 24.

Therefore, the hot water heated in the water jacket 3 is supplied to the hot water outlet 13 and the heat exchanger 2 in the hot water tank 7.
4, the heat is supplied to the tap water in the hot water storage tank 7, and then the water is supplied again to the water jacket 3 as cooling water.

In this way, the temperature of the tap water in the hot water storage tank 7 gradually rises to warm water, and the hot water in the hot water storage tank 7 is heated to a higher temperature by the exhaust pipe 8 heated by the exhaust gas. To be done.

In this case, when the amount of hot water in the hot water storage tank 7 is insufficient or when the temperature of the hot water in the hot water storage tank 7 is adjusted, the valve 12 is opened at an appropriate time to supply the clean water. It is supplied to the vicinity of the exhaust pipe 8 in the hot water storage tank 7 through the pipe 22.

Therefore, the clean water having a low temperature is quickly heated by the heat of the exhaust pipe 8 to become hot water. In this way, by driving the reuse engine 1,
A required amount of warm water that has been efficiently heated is stored in the hot water storage tank 7.

In this case, the pump 17 is operated and the valve 18 is opened while driving the reusable engine 1 or while the reusable engine 1 is stopped, as shown in FIG. The hot water can be supplied from the hot water storage tank 7 to a shower faucet of a bathroom, which is a water supply facility, and can also be used for heating.

On the other hand, while the reusable engine 1 is operating, the generator G is similarly driven to generate electric power,
Electric power is directly supplied from the generator G to the light 32, the air conditioner 33, the television 36, etc. via the internal power switch 31, the connection protection device 36, and the breaker 37 in the house as shown in FIG. be able to. At this time, if there is still excess power, the breaker 4
3. The surplus power can be sent back to the external power line 41 via the outdoor switch 40 and the power sale metering device 38. That is, the surplus power can be sold to the power company.

Further, the electric power from the generator G can be stored in an electric storage device (not shown) separately installed indoors and used in a timely manner. Furthermore, while the generator G is at rest,
By shutting off the linkage protection device 36 and the breaker 37, the electric power supplied through the power line 41 of the electric power company is purchased through the metering device 39 for power purchase and the outdoor switch 40, and the electric light 32 and the air conditioner in the room are supplied. It can be incorporated in an electric device such as the SHONER 35.

That is, according to the present invention, by operating the reusable engine 1 by using city gas or propane gas as fuel, electric power is generated and heat is recovered from the engine cooling water and the exhaust gas to obtain sufficient hot water. Can be stored and supplied.

For example, when an automobile engine of about 1600 cc is refurbished as described above and is used as the reuse engine 1, it is expected that 30 KW of electric power and 20 KW of exhaust heat energy will be recovered. Therefore, only by operating the reusable engine 1 for one hour, a power amount of 30 KWh and a heat amount of 17,000 Kcal can be obtained, which is equivalent to the hot water supply amount for two days of one family of four in winter.

That is, in the home where the cogeneration system of the present invention is installed, the contract current of electric power can be reduced, and in summer, the system operates to supply the insufficient electric power during the peak electric power hours in the daytime. You can store hot water needed for the day and use it for kitchen hot water supply or bath. Further, if the engine is operated when the bath is heated, the electric power generated during that time can be used for electric appliances.

[0041]

As described above, according to the present invention, the reusable engine driven by city gas or propane gas supplied through the gas pipe and the clean water supplied from the water supply are stored, and An exhaust pipe of the reusable engine is inserted thereinto, and a hot water storage tank for supplying hot water heated by exhaust heat discharged through the exhaust pipe is provided, and the water is cooled into a water jacket of the reusable engine. Water is supplied as hot water, and hot water heated in the water jacket is supplied to the hot water storage tank, or tap water previously stored in the water jacket of the reuse engine is circulated as cooling water. By inserting a part of the hot water into the hot water storage tank, hot water in the hot water storage tank can be supplied from the hot water supply pipe, and heat is taken from the hot water in the hot water storage tank to heat it. It can be used. Since it is configured to supply electric power from the generator connected to the reuse engine, it makes it possible to reuse the engine of the automobile discarded as industrial waste, and drive the generator by operating this reuse engine. By generating electric power, it is possible to contribute to the peak cut during the peak electric power in summer and winter.

Further, such a cogeneration system uses an inexpensive reusable engine, so that each household, which has never been seen before, and households in areas where power supply is difficult,
Introducing to a mountain cottage, etc. is cheap and easy, and at home, it is possible to reduce the cost burden by keeping the contracted electric power with the electric power company low.

[Brief description of drawings]

FIG. 1 is a sectional view showing a cogeneration system according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a cogeneration system according to another embodiment of the present invention.

FIG. 3 is an explanatory view showing a house installation example of the cogeneration system of the present invention.

[Explanation of symbols]

 1 Reuse engine 2 Gas pipe 3 Water jacket 4 Water supply branch pipe 7 Hot water storage tank 8 Exhaust pipe 11 Water supply pipe 16 Hot water supply pipe 24, 26 Heat exchanger A, B Cogeneration system G Generator

Claims (2)

[Claims] 1. A reusable engine driven by city gas or propane gas supplied through a gas pipe, and clean water supplied from water supply, and an exhaust pipe of the reusable engine is inserted therein. And a hot water storage tank for supplying hot water heated by the exhaust heat discharged through the exhaust pipe, and a generator driven by the reuse engine, and the water supply into the water jacket of the reuse engine. Is supplied as cooling water, and hot water heated in the water jacket is supplied to the hot water storage tank. 2. A reusable engine driven by using city gas or propane gas supplied through a gas pipe as fuel, and clean water supplied from water supply is stored, and an exhaust pipe of the reusable engine is inserted therein. And a hot water tank for supplying hot water heated by the exhaust heat discharged through the exhaust pipe, and a generator driven by the reusable engine, which was previously housed in the water jacket of the reusable engine. A cogeneration system characterized in that tap water is circulated as cooling water, and a part of this circulation path is inserted into the hot water storage tank.