Combined stirling-plant for the simultaneous production of electricity and heat

 

(57) Abstract:

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 and heat. Technical result achieved - increasing efficiency and reducing the overall size of the installation. During operation of the 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 includes a cooling circuit 18, which is connected through the heat exchanger 13 with external heat supply and through a heat exchanger-cooler 20 from the supply line to the atmospheric air 21. Water from the return line 12 is partially supplied to the steam generator 6, through which passes the line of exhaust gases 4, partly in the steam-water pump-heater 7. High-pressure steam from the steam generator 6 is fed into the steam-water pump-heater 7, is mixed with water from line 16, form water with high temperature and pressure. Due to this pressure is the flow of hot water through line 11 is on highways is provided by control valves 15, 17. 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 and heat.

A device power plant comprising an internal combustion engine (ice) with the shaft of the consumer power through the coupling and the utilization of steam turbine installation with circuit of the working fluid including steam turbine, condenser, feed pump, steam generator, placed in the line of production of high temperature exhaust gases of internal combustion engines (Author's certificate. N 1677360. Bulletin of inventions No. 34 from 15.4.91, p. 141-142). However, this device is not intended for production of thermal energy for heating external customers and uses Newcomerstown Converter direct cycle - combustion engine.

A device steam-water pump-heater (EOR) intended for use in various industrial technologies using steam, combining the functions of a heater and pump at the same time. The application of EOR can significantly reduce the consumption of the electric power industry is edburga"/ newspaper /, 5 (11), from 25.05.99 year). However, previously the steam-water pump-heater in cogeneration plants has not been applied.

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 5. SPb., 1997, page 140). However, to improve the efficiency of the Stirling engine you want to use coolant with minimum temperature.

A device of the Stirling engine, comprising a combustion chamber, a heater, a regenerator, refrigerator, piston and drive, Reader., H. Hooper. Stirling Engines. M., Ed. Mir, 1986, page 55).

Known combination unit on the basis of the Stirling engine with generator on the same shaft, lines, fuel supply and heat exchanger for heating a liquid, through which the exhaust gases of the engine Steginga, while the heated fluid is conveyed to the external line (Application EPO 0457399. Abstract journal "the Invention of the world", Viator, and it is not intended for generation of steam and its use in external systems.

A device cogeneration plants designed for the simultaneous production of electricity and heat, which includes an internal combustion engine with a generator on the same shaft, a supply of fuel, the cooling circuit of the engine, the heating circuit (heating system with heat consumers), a system of heat exchangers which transfer heat engine coolant and high temperature exhaust gas in the heating circuit, and a control Board ("Construction review"//Journal of quality//, SPb., 5 (32), may-June 1999, pp. 16-17). However, this device does not involve the production of steam and use it to reduce electricity consumption for own needs, as well as a Converter direct cycle is used internal-combustion engine, having a low efficiency and a high concentration of harmful substances in the exhaust gases.

The technical result, which can be obtained by carrying out the invention, is to improve efficiency, by reducing energy consumption for own needs and use more Vysokova the output characteristics of the unit as a whole.

To achieve this technical result combined Stirling-plant for the simultaneous production of electricity and heat, comprising a Converter direct cycle (engine) generator on the same shaft, line, fuel line, heat exchanger-the heat exchanger high temperature exhaust gases of the engine through which the highway passes the exhaust gases of the engine, the cooling circuit of the engine, which is connected through a heat exchanger system with external heat is supplied, as a Converter direct cycle, Stirling engine, heat exchanger-heat exchanger high temperature exhaust gases of the engine, made in the form of steam generator, steam and water pump-heater, heat exchanger-a heat exchanger low-temperature exhaust gases of the engine, heat exchanger-cooler located in the cooling circuit of the Stirling engine, and a supply line to the air in the combustion chamber of the engine, passing through the heat exchanger-cooler, and a closed system of highways that provide heat transfer from the engine to the heat consumers and consisting of a backbone of high-pressure steam coming from the steam generator to provately heat line return chilled water heat exchanger pre-heating coming from consumers of heat and divides into line with valve going into the steam generator, and a line valve, passing through the heat exchanger-heat exchanger low-temperature exhaust gases of the engine, going to steam-water pump-heater, while the backbone of the return chilled water external heating system associated with the cooling circuit of the engine through the heat exchanger pre-heating and highway exhaust gases of the engine passes successively, first, through the steam generator, and then through the heat exchanger-heat exchanger low-temperature exhaust gases.

Introduction the combination Stirling-installation for the simultaneous production of heat and power Stirling engine, heat exchanger utilizing high-temperature exhaust gas of the engine, made in the form of steam generator, steam and water pump-heater and heat-exchanger low-temperature exhaust gases of the engine, heat exchanger-cooler located in the cooling circuit of the Stirling engine, and the main air supply is with control valves providing heat transfer from the engine to the heat consumers, allows to obtain a new property, i.e. the integrated use of the residual heat of the waste gases of the engine and the heat of the cooling circuit of the engine for heating the external heat consumers, and produce high-pressure steam for the purpose of its further use to replace a network of pumps and heat exchangers in the heating system and obtaining the low temperature cooling circuit of the Stirling engine.

The drawing shows a combined Stirling-plant for the simultaneous production of electricity and heat.

The combination unit includes a Stirling engine 1 with the combustion chamber 2 and the cooler 3, the line of exhaust gases 4 generator 5 that are located on the same shaft with the engine 1, the heat exchanger-the heat exchanger high temperature exhaust gas is made in the form of a steam generator 6, the steam-water pump-heater 7, the heat exchanger-heat exchanger low-temperature exhaust gas 8, heat consumers 9 and a closed system of arteries, consisting of a backbone of high-pressure steam 10 coming from wasp-heater 7 to heat consumers 9, line return chilled water from 12 to heat exchanger preheating 13 coming from the heat consumers 9 and divides the line 14, valve 15, going into the steam generator 6, and the line 16 and valve 17, passing through the heat exchanger-heat exchanger low-temperature exhaust gas 8, which is coming to steam-water pump-heater 7, the cooling circuit 18 of the engine 1, passing through the cooler 3, the pump 19 and heat exchanger-cooler 20 associated with highway 12 through the heat exchanger 13. The unit also includes a supply line to the air 21 into the combustion chamber 2, passes through the heat exchanger-cooler 20, with the release into the environment 22 and control valve 23. Highway exhaust gases 4 of the engine 1 passes successively, first, through the steam generator 6, and then through the heat exchanger-heat exchanger low-temperature exhaust gases 8.

Combined Stirling-plant for the simultaneous production of electricity and heat works as follows.

During operation of the engine 1 produces useful energy that is converted into electrical energy by a generator 5, which is located on the same shaft with dvigatelem engine 1, the heated coolant from the cooler 3, first, enters the heat exchanger 13 where it is cooled by heat exchange with return water of the external heating system, and then, in the heat exchanger-cooler 20, its temperature is reduced to a minimum, due to heat exchange with the air atmosphere. Return chilled water through line 12 from consumers 9, passing through the heat exchanger 13, is divided into line 14, going into the steam generator 6 to produce high-pressure steam by heat exchange with high-temperature exhaust gases coming from the combustion chamber 2 through line 4, and line 16, passing through the heat exchanger-the heat exchanger 8, where the water is additionally heated by the residual heat of low-temperature exhaust gases coming from the steam generator 6, the steam-water pump-heater 7. Simultaneously, the steam generator 6, line 10, receives high pressure steam. In the steam and water pump-heater 7, due to the special design and the effect of mixing the two-phase vapor-liquid media pressure, intensive mixing of the steam and water, with the subsequent production of hot water with high temperature (up to 100oC) and pressure. Due to this pressure going on the x 12, 14, 16. To regulate the flow of water on highways is provided by control valves 15 and 17. Atmospheric air through line 21 passes through the heat exchanger 20, is heated and enters the combustion chamber 2. To regulate the quantity of air supplied into the combustion chamber 2, by using a regulating valve 23 located on issue 22.

Sources of information

1. Author's certificate. 1677360. Bulletin of inventions 34 from 15.4.91 G., S. 141-142.

2. "Energy Petersburg//newspaper//. 5 (11), from 25.05.99,

3. 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 5, SPb.. 1997, page 140.

4. , Reader., H. Hooper. Stirling Engines. M., Ed. Mir, 1986, page 55.

5. The application of EPO 0457399. Abstract journal "the Invention of the world", issue 65, 5, 1993, page 13.

6. "Construction review" /Journal//, SPb., 5 (32), may-June 1999, S. 16-17 prototype.

Combined Stirling-plant for the simultaneous production of electricity and heat, comprising a Converter direct cycle (engine) generator on one valeres which highway exhaust gases of the engine, the cooling circuit of the engine, which is connected through a heat exchanger system with external heat supply, characterized in that it is supplied as a Converter direct cycle Stirling engine, heat exchanger-heat exchanger high temperature exhaust gases of the engine, made in the form of steam generator, steam and water pump-heater, heat exchanger-a heat exchanger low-temperature exhaust gases of the engine, heat exchanger-cooler located in the cooling circuit of the Stirling engine, and a supply line to the air in the combustion chamber of the engine, passing through the heat exchanger-cooler, and a closed system of highways that provide heat transfer from the engine to the heat consumers and consisting of a backbone of high-pressure steam, coming from the steam generator to the steam-water pump-heater, mains hot water coming from the steam-water pump-heater to heat consumers, highways return chilled water heat exchanger pre-heating coming from consumers of heat and divides into line with valve going into the steam generator, and a line valve, passing through the heat exchanger-the heat exchanger of discomposure external chilled water heating system associated with the cooling circuit of the engine through the heat exchanger pre-heating and highway exhaust gases of the engine sequentially passes first through the steam generator, and then through the heat exchanger-heat exchanger low-temperature exhaust gases.

 

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