Method of heat transformation for generating heating media with operationally necessary temperature from partly cold and partly hot heat loss of liquid-cooled internal combustion piston engines and device for executing the method

A device for realizing the process of heat transformation to convert the low temperature waste heat from cooling circuits of block-type thermal power station (BTPS) reciprocating-piston combustion engines into steam or other heating media of a temperature required for operation by adopting the principle of the high-temperature heat pump and utilizing the additionally fired fuel from the energy of the exhaust gas and, if required, in a burner according to which the low-temperature heat produced by recooling the engine cooling circuits to their required inflow temperature is transferred to a liquid working medium, is absorbed by the resultant working-media vapours by working media partial evaporation, is brought, by compressing the working medium vapours from the low evaporation pressure conditioned by the recooling temperature of the engine cooling circuits, to a higher condensation pressure as is required for the transmission of heat to the in-plant heating medium and is conditioned by the saturation pressure for the desired temperature of the in-plant medium, and is transferred by condensation to the in-plant heating medium, and according to which the energy of the exhaust gas is used for compressing the working-medium vapours, including a reciprocating-piston combustion engine (1.0) with a electric generator (1.1) coupled thereto, with a heat transformer composed of engine cooling circuits for charging air and/or a mix (1.4, 1.5), engine oil (1.6), and cylinders which dissipate their heat into a low-pressure boiler (2.0) via a working liquid, further composed of a motive-steam high-pressure boiler including a waste-heat steam generator (3.0), a superheater (3.1) connected upstream thereof on the exhaust-gas side and a feed water preheater (3.3) connected downstream thereof, and including a medium-pressure heating boiler (5.0) which is fired with working-medium vapours from the low pressure boiler (2.0) which undergo compression via a vapour compressor (4.0) operated by the superheated motive steam from the superheater (3.1), characterized in that a steam jet compressor (4.0.1) is used the expanded motive steam of which, along with the compressed vapours, is passed into the heating-steam medium-pressure boiler (5.0) of the heat transformer for further use for heating the plant (FIG. 2.1).

A process of heat transformation to convert the low-temperature waste heat from cooling circuits of block-type thermal power station (BTPS) reciprocating-piston combustion engines into steam or other heating media of a temperature required for operation by adopting the principle of the high-temperature heat-pump wherein the low-temperature heat is produced at temperatures to which the cooling circuits may be recooled by partial evaporation of a working medium without any drop below the ambient pressure in any point or at any operating condition of the heat transformer at the saturation pressures of the working medium which thereby occur, according to which the low-temperature heat produced by recooling the engine cooling circuits to their required inflow temperature,

• is transferred to a liquid working medium,
• is absorbed by the resultant working media vapours by working media partial evaporation,
• is brought, by compressing the working medium vapours from the low evaporation pressure conditioned by the recooling temperature of the engine cooling circuits, to a higher condensation pressure as is required for the transmission of heat to the in-plant heating medium and is conditioned by the saturation pressure for the desired temperature of the in-plant heating medium,
• and is transferred by condensation to the in-plant heating medium, characterized in that the energy required for the compression of the working-medium vapours is fed fully or in part by means of a mechanical compressor utilizing the exhaust gas heat content of the BTPS reciprocating-piston combustion engine,
• wherein the BTPS are employed for the cylinder cooling circuit where the preponderant output of waste heat is produced by an inflow temperature which is so far above 100° Celsius that water may be used as the working medium of the heat pump and may be employed to operate a plant from the engine cooling circuits via the heat pump to in-plant heating circuits without any media separation and without any drop of the ambient pressure below its level.