Power plants – Motive fluid energized by externally applied heat – Power system involving change of state
Patent
1988-03-16
1989-10-31
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Power system involving change of state
622384, 62467, 60651, F25B 2700
Patent
active
048768561
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a heat exchanging system which generates thermal energy of high temperature by using thermal energy of a low temperature and cold heat energy, and more particularly to a heat exchanging system which extracts thermal energy of a high temperature from such a heat source as thermal energy of solar heat or exhaust heat or other constant temperature thermal energy, and a power generator/heat exchanger driven by temperature differences which combines a diesel engine, gas engine or other internal combustion engine with a temperature-difference-driven-engine to effectively utilize thermal energy as well as to drive a power generator.
PRIOR ART
A heat pump transmits and transfers thermal energy by utilizing vaporization heat generated during vaporization of a heating medium and condensation heat generated by liquefaction thereof. For instance, a heat pump is exemplified by a heater which becomes hotter as the outdoor atmospheric temperature becomes lower. There has been known a heater wherein a heat pump is driven by another heat engine. The heater drives a heat engine by the differences in temperature between the cold atmospheric temperature and a constant temperature of a heat source, a motor is connected to the output shaft of the heat engine via an automatic centrifugal clutch, and when the output of said heat engine is sufficiently large, said clutch is automatically connected by a controller to thereby actuate the heat pump directly with the output of the heat engine, to extract heat from the constant temperature heat source with said pump and to guide the heat to a radiator, and when the output of said heat engine is not sufficient, said clutch is automatically switched off by the controller to actuate the heat pump by the power generator.
As in the conventional heater system with an automatic clutch and a controller, when the output from the heat engine is insufficient, the power on the side of the heat engine is switched off and the heat pump is driven by the output from the motor; thus a large electric power of the motor is required. Moreover, the changes in output on the side of the heat engine are not always correctly followed by the controller or the automatic clutch, the heat pump is often driven by the low output of the heat engine while the motor has not yet been actuated, presenting problems in operation of the heat pump and hence of the heating system. The electric motor is usually connected to a compressor of the heat pump. A motor is usually assembled integrally with a compressor in a sealed case in a heater. If a rotational output shaft of a heat engine is additionally connected with such an assembly the structure becomes weak and the heat in the heat pump system will leak from its connections. In the non-sealed type having a compressor and a motor separately, the size of the compressor and the motor is too large to be used as the heater of this type.
There is also known a power generator/heater which actuates a generator by a gas turbine or a diesel engine, and uses the waste heat of the diesel engine as the heat source for another heater system to thereby concurrently supply electric power and heat. As the fuel used for actuating the diesel engine is partly converted to electric energy and partly into heat energy, the power generator per se is driven directly by the diesel engine. The waste heat from the diesel engine is not utilized as an energy for power generation at all.
The above mentioned power generator/heater is a system which supplies electricity and heat simultaneously. Although it enhances the use efficiency of the primary energy such as fuels, as far as power generation is concerned, it is controlled by the capacity of the diesel engine alone. The power generation efficiency cannot, therefore, exceed that of the diesel engine, and it is, in a sense, not unlike a conventional power generator system which does not use waste heat at all.
An object of this invention, accordingly, is to provide a heat exchanging system which can be a
REFERENCES:
patent: 2952138 (1960-09-01), Russell et al.
patent: 3196631 (1965-07-01), Holland
patent: 3355903 (1967-12-01), LaFleur
patent: 4177651 (1979-12-01), McFarland
Iishiki Naotsugu
Mishima Shiro
Okano Shigetou
Ostrager Allen M.
Yamato Kosan Co., Ltd.
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