JPH0238765B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a temperature difference drive generator that generates electricity using low-temperature thermal energy, and particularly to a temperature difference drive generator that uses a combination of an internal combustion engine such as a diesel engine or a gas engine, and a temperature difference engine. The present invention relates to a temperature difference drive generator that drives a generator while making effective use of thermal energy.

(Prior art) Conventionally, a gas turbine, diesel engine, etc. is used to turn a generator, and the exhaust heat from the diesel engine, etc. is used as a heat source for other heating devices, etc., thereby providing electricity and heat at the same time. Co-generation power generation systems are known. In this case, part of the fuel used to drive the diesel engine is converted into electrical energy and the other part into thermal energy, and it is only the diesel engine that directly rotates the generator. Moreover, the waste heat is not reused as energy for power generation.

(Problems to be Solved by the Invention) The conventionally known combined heat and power generation system described above is a system that extracts electricity and heat at the same time, and improves the efficiency of using primary energy sources such as fuel. When it comes to power generation, it is generated using the capacity of a diesel engine, so the power generation efficiency cannot exceed that of a diesel engine, and this is different from conventional independent power generation systems that discard waste heat without utilizing it. do not have.

The present invention utilizes low-temperature thermal energy, rotational drive energy of an internal combustion engine, generated thermal energy of an internal combustion engine, and thermal energy obtained from any other heat source device as energy for power generation, thereby enabling highly efficient power generation. The purpose of the present invention is to provide a temperature difference driven generator.

(Means for Solving the Problems) A temperature difference drive generator according to the present invention includes a temperature difference engine provided in the main heat medium circulation path connecting a radiator and an evaporator, and a generator mounted on the output shaft of the temperature difference engine. An internal combustion engine is connected to the rotating shaft of the generator via a clutch, and the heat generated by the operation of the internal combustion engine and the heat collected from other external heat source devices are transferred to the evaporator via a secondary heat medium circulation path. It was designed to be supplied. Here, as the internal combustion engine, a diesel engine, a gas engine, a gas turbine, etc. are effectively used, and in some cases, a gasoline engine can also be adopted.

(Examples) Next, examples of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram of a temperature difference drive generator according to an embodiment of the present invention. For example, a radiator 11 exposed to outdoor cold air, an evaporator 13 that exchanges heat with a constant temperature heat source such as a solar heat collector 9 via a heat storage tank 8, and a temperature difference engine 12 that generate the main heat. They are connected in a closed circuit by a medium circulation path 14, and a main heat medium that easily changes into gas and liquid, such as fluorocarbon, is sealed in this main heat medium circulation path 14. A pump 16 is provided in the main heat medium circulation path 14 as required. The temperature difference engine 12 is connected to the circulation path 14
It is composed of a turbine-type rotary power machine connected to the generator 4 through a nozzle, and its rotary output shaft 15 is connected to the generator 4 through a nozzle.
One of the input shafts is connected to the input shaft. The generator 4 is of a type having an input shaft at each end, and the other input shaft is connected to an internal combustion engine, for example, a diesel engine 9 via a coupling 17. The coupling ring 17 is configured to be disconnectable by a control device (not shown). 10 is a fuel tank that supplies fuel to the diesel engine 9.

The exhaust gas from the operation of the diesel engine 9 is
It is discharged through an exhaust heat exchanger 19 and a muffler 20, which will be described later. Further, the cooling water of the diesel engine 9 is heated by the operation of the engine, and this heated cooling water is also circulated through a water-water heat exchanger 21, which will be described later, through a pipe 23. Cold water is supplied to the heat storage tank 8, and a part of this cold water circulates between the heat storage tank 8 and the waste heat exchanger 19 through the pipe 22, and a part of the cold water circulates between the water and the waste heat exchanger 19. It circulates through the heat exchanger 21. Furthermore, the outdoor solar heat collector 18 and the heat storage tank 8 are also connected via piping 24, 24'.
A pump 25 is configured to circulate water between them. A portion of the water in the heat storage tank 8 heated by the waste heat exchanger 19, the water-water heat exchanger 21, and the solar heat collector 18 is fed to the hot water pump 26.
Although most of the hot water may be taken out by the evaporator 13 via the auxiliary heat medium circulation path 27 and the pump 29 and used as a hot water supply, the hot water may be extracted from the evaporator 13 in a separate system from the main heat medium circulation path 14. It's starting to circulate.

With this configuration, in the main heat medium circulation system,
Outdoor cold air facing the radiator 11 and the evaporator 1
When there is a certain temperature difference between the heat source No. 3 and the heat source No. 3, the main heat medium gas vaporized in the evaporator 13 by the heat source is introduced into the temperature difference engine 12 from the main heat medium circulation path 14, and then transferred to the heat radiator 11. It is liquefied by outside cold air, vaporized again in the evaporator 13, and circulated within the system. The inside of the temperature difference engine 12 is in a negative pressure state due to suction caused by volume contraction accompanying the phase change of the main heat medium from gas to liquid in the radiator 11, and is introduced from the circulation path 14. The rotor of the turbine is rotated by the jetting of the gaseous heat medium from the nozzle, and rotational power is applied to the output shaft 15. As the temperature of the outdoor cold air decreases, the temperature between the radiator 11 and the evaporator 13 increases, and the gas injection force from the circulation path 14 to the temperature difference engine 12 is strong, and a large amount of power is output. The power of the temperature difference engine 12 drives the generator 4 to obtain electric power.

On the other hand, the generator 4 is directly driven by the operation of the diesel engine 9, and the exhaust heat and the heat of the engine cooling water due to the operation of the diesel engine 9 are transferred to the heat storage tank 8 through the heat exchangers 19 and 21 as described above. is stored in the secondary heat medium of the secondary heat medium circulation path 27.
It becomes a heat source for the evaporator 13 through the evaporator 13. As the rotation speed of the diesel engine 9 increases, the exhaust heat of the engine 9 and the temperature of the engine cooling water increase, and as a result, the temperature difference between the radiator 11 and the evaporator 13 increases.
The generator driving power of the temperature difference engine 12 increases.

In the above embodiment, when there is a certain temperature difference between the inside of the building and the outside, the auxiliary heat medium circulation system is created by the radiator 11 exposed to the cold air outside and the evaporator 13 installed inside the building. Even if there is no gas, the main heat medium (fluorocarbon) in the main heat medium circulation path 14 changes into gas and liquid and circulates, thereby causing the temperature difference engine 12 to operate.
Power generation by the generator 4 is possible. Therefore, depending on the conditions of the radiator 11 and the evaporator 13, when the temperature difference engine 12 can output sufficient power to drive the generator, the clutch 17 is disengaged and the temperature difference engine 12
The generator 4 is driven only by the When the output decreases, the clutch 17 is connected again to connect the diesel engine 9 to the generator 4.

(Effects of the Invention) As explained above, according to the present invention, the temperature difference between the radiator and the evaporator is used to drive the generator, and the internal combustion engine for driving the generator is also used. Since heat (exhaust gas, engine cooling water) is used to increase the temperature difference between the radiator and the evaporator, the overall effect is that highly efficient power generation can be performed without wasting energy.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a temperature difference drive generator according to an embodiment of the present invention. 4... Generator, 8... Heat storage tank, 9... Diesel engine, 11... Heat radiator, 12... Temperature difference engine, 13... Evaporator, 14... Main heat medium circulation path, 15... Output Shaft, 17...Cup ring, 1
8...Solar heat collector, 19...Exhaust heat exchanger, 21
...Water-water heat exchanger, 27...Sub-heat medium circulation path.

Claims (1)

[Claims] 1. A temperature difference engine is provided in the main heat medium circulation path connecting the radiator and the evaporator, a generator is attached to the output shaft of the temperature difference engine, and an internal combustion engine is connected to the rotating shaft of the generator via a clutch. . A temperature difference drive generator, characterized in that heat produced by the operation of the internal combustion engine and collected heat from other external heat source devices are supplied to the evaporator via an auxiliary heat medium circulation path.