Offline combined power plant based on a stirling engine

 

(57) Abstract:

The invention relates to a power system and Stirling engines, is designed as a stand-alone power plants for stationary and mobile objects with the simultaneous production of electricity, heat and cold. During operation of the Stirling engine produces useful energy that is converted into electrical energy by a generator located on the same shaft with the engine. For engine cooling system used for cooling, through which the battery is cold, the coolant temperature is reduced to the minimum temperature. High temperature exhaust gases from the combustion chamber through line received in the ejector refrigeration machine, by which the evaporator is generated cold passed through the line of the coolant in the battery is cold. A single circuit external heat supply takes the heat from the cooling system in the heat exchanger and the heat of the refrigerating machine in the condenser, passing to its consumers. To regulate the flow of the coolant in the condenser is designed bypass line valve. The invention improves the efficiency of the engine Svojstva electricity, heat and cold 1 Il.

The invention relates to the field of heat and Stirling engines, is designed as a stand-alone power plants for stationary and mobile objects with the simultaneous production of electricity, heat and cold.

It is known that the Autonomous energy sources on the basis of Stirling engines offer high efficiency and a reduced concentration of harmful emissions in the exhaust gases (N. Kirillov.G. The use of highly efficient and environmentally friendly cars Stirling in marine energy. /Proceedings of the 2nd int. Conf. Maritime intellectual technologies "Morintech-97"/. Volume No. 5, SPb., 1997, page 140). However, to improve the efficiency of the Stirling engine you want to use coolant with minimum temperature.

Well known concept of the ejector refrigerating machine comprising an evaporator, the steam jet pump (ejector), the condenser, the steam generator, a pump, a throttle valve (M Century. Urosev. Refrigeration unit. L., Ed. LVIVSKA, 1979, page 139).

A device of the immersion heat exchangers, which can be used as batteries for the cold (M Century. Urosev. Refrigeration unit. L., Of Whom, the heater, regenerator, refrigerator and piston group (G Reader., H. Hooper, Stirling Engines. M., Ed. Mir, 1986, page 55).

Known power unit with Stirling engine, comprising a Stirling engine and heat the car running by the heat of exhaust gases of the engine and generating cold, to reduce the minimum temperature of the cycle of the Stirling engine (Patent RF N 2099564, F 02 G 5/00, bull. N 35 from 20.12.97). However, this unit is not intended for heat generation.

Known combination unit on the basis of the Stirling engine, designed for simultaneous generation of electricity and heat, with a generator on the same shaft and cooling system, lines, fuel supply and heat exchanger for heating the liquid, through which the exhaust gases of the Stirling engine, while the heated fluid is conveyed to the external line (Application EPO N 0457399. Abstract journal "the Invention of the world", issue 65, No. 5, 1993, page 13). However, this installation is a complex system of joint cooling of the engine and generator, and also, this solution does not provide for the minimum temperature for cooling of the engine.

To achieve this, the technical result of the Autonomous combined power plant based on a Stirling engine, comprising a Stirling engine with generator on the same shaft and cooling system, lines, fuel line, heat exchanger-a heat exchanger in the exhaust gases of the engine through which the highway passes the exhaust gases of the engine, a system of external heating with heat consumers, equipped with a steam jet refrigerating machine with a steam generator and superheater used as heat exchangers, waste heat of exhaust gases of the engine, the battery is cold, which passes through the engine cooling system and the backbone of the coolant from the evaporator of the refrigerating machine, and, a single closed loop heat transfer from the engine and the refrigeration machine to heat consumers, containing the pump and passing successively through the heat exchanger-cooler cooling system of the engine and the condenser of the refrigeration machine, in this case, the loop contains a bypass jumper valve located in parallel with the condenser of the refrigeration machine. the objectarray refrigerating machine, battery cold, connecting the engine cooling system with cooling machine, highway exhaust gases of the engine, passing through the steam generator and superheater refrigerating machine, and a single closed loop heat transfer from the engine and the refrigeration machine to an external heat consumers with bypass jumper allows you to get a new property, such as the ability to use the heat capacity of the exhaust gases for cooling and decreasing the minimum temperature of the cycle of the Stirling engine, as well as the combined use of heat of the engine coolant and exhaust gases to the external heat supply systems.

The drawing shows offline combined power plant based on a Stirling engine.

Offline combined power plant includes a Stirling engine with 1 line of exhaust gases 2, combustion chamber 3, a refrigerator with 4 generator 5 that are located on the same shaft with the engine 1, and a cooling system 6 consisting of a heat exchanger-cooler 7 and the pump 8, the ejector refrigeration machine 9, which includes a steam generator 10, the superheater 11, the ejector 12, condensational machine 9 to the external heat consumers, consisting of a pump 18, 19 and heat consumers bypass jumpers 20 valve 21. The Stirling engine 1 is connected with the refrigerating machine 9 through the battery cold 22 through the cooling system 6 and highway circulation of the coolant 23, from the evaporator 16, the pump 24.

Offline combined power plant based on a Stirling engine works as follows.

During operation of the Stirling engine 1 produces useful energy that is converted into electrical energy by a generator 5, which is located on the same shaft with the engine 1. For cooling the engine 1 is used, the cooling system 6, in which the coolant is first cooled in a heat exchanger-cooler 7, and then, in the battery of cold 22, and with a minimum temperature, a pump 8, is returned to the refrigerator 4 of the engine 1. High temperature exhaust gases from the combustion chamber 3 through line 2 enter the ejector refrigeration machine 9, passing through the superheater 11 and the steam generator 10, forming steam with high pressure in the refrigeration machine 9. Steam from the superheater 11 enters the ejector 12, resulting from the evaporator 16 are exhausted pair of coolant, with lowered is ondensate using the pump 14 is supplied to the steam generator 10, and the other part passing through the throttle valve 15 is supplied to the evaporator 16. Due to low pressure in the evaporator 16, a portion of the condensate evaporates, and the other part is cooled. Cold condensate through line 23, pump 24, is pumped through a battery of cold 22 which cools the coolant of the cooling system 6. A single circuit external heat supply 17 absorbs heat from the cooling system 6 in the heat exchanger 7 and the heat of the refrigerating machine 9 in the condenser 13, passing it to consumers 19. The circulation is effected by a pump 18. To regulate the flow of coolant to the condenser 13 is designed bypass line 20 valve 21.

Sources of information taken into account in the preparation of the application:

1. Kirillov, N. G. The use of highly efficient and environmentally friendly cars Stirling in marine energy. /Proceedings of the 2nd int. Conf. Maritime intellectual technologies "Morintech-97"/, Volume No. 5, SPb., 1997, page 140.

2. Urosev M. C. Refrigeration unit. L., Ed. LVIVSKA, 1979. -page 139.

3. Urosev M. C. Refrigeration unit. L., Ed. LVIVSKA, 1979. -page 97.

4. By The Reader. , Including Hooper. Stirling Engines. M., Ed. Mir, 1986, page 55.

Offline combined power plant based on a Stirling engine, comprising a Stirling engine with generator on the same shaft and cooling system, lines, fuel line, heat exchanger-a heat exchanger in the exhaust gases of the engine through which the highway passes the exhaust gases of the engine, a system of external heat consumer heat, characterized in that provided with the ejector refrigerating machine with a steam generator and superheater used as heat exchangers, waste heat of exhaust gases of the engine, the battery is cold, which passes through the engine cooling system and the backbone of the coolant from the evaporator of the refrigerating machine, one closed loop heat transfer from the engine and the refrigeration machine to heat consumers, containing the pump and passing successively through the heat exchanger-cooler cooling system of the engine and the condenser of the refrigeration machine, the loop contains a bypass jumper valve located in parallel with the condenser of the refrigeration machine.

 

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SUBSTANCE: invention can be used as power plant for special application, for instance, for special fortifications, submerged objects and mobile complexes. Heat accumulator is charged by energy supplied from heat source through closed gas circuit. Circulation of gas heat carrier, for instance, helium, in closed circuit is provided by compressor. Heat from heat accumulating substance is conveyed through walls of accumulator to walls of heater of Stirling engine, leading to gradual temperature rise and pressure rise in working circuit of engine and starting of engine. With engine operating, mechanical energy is converted into electric energy by electric generator. Cooler is used for cooling Stirling engine by cooling medium circulating through cooler.

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