SU1537843A1 - Method of operating a closed-path gas turbine unit - Google Patents

Abstract

The invention improves efficiency. The non-condensable working fluid is compressed in compressor 1, it is subsequently heated and saturated with vapors of the condensed working fluid in the regenerative heat exchanger 2 when in contact with the intermediate liquid working fluid, in the heat exchanger 4 when in contact with the working fluid heated in the heat source 3 and in the surface heat exchanger 5 with the heat source 3 The mixture expands in the turbine 6 and is sequentially cooled with condensation of the condensable working fluid in the heat exchanger 7 upon contact with the intermediate working fluid in the heat exchanger 9, heat in the auxiliary cycle, and in the heat exchanger 10, heat in the auxiliary cycle, and in the heat exchanger 10, heat to the drain 13. The liquid condensed working fluid is supplied by the pump 8 for heating to the heat source 3. Effects are enhanced by the use of condensable working fluid in regeneration. 1 il.

Description

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The invention relates to a power system and can be used in power plants.

The purpose of the invention is to increase efficiency.

The drawing shows a schematic diagram of a closed gas turbine installation that implements the method.

A closed gas turbine unit contains a compressor 1 installed in the working fluid path, a regenerative contact heat exchanger 2, a contact heat exchanger 4 and a surface heat exchanger 5, a turbine 6 with an electric generator, a regenerative contact heat exchanger 7 and surface heat exchangers connected through a pump 8 to the heat source 3 9 and 10.

The installation also contains an auxiliary steam power circuit connected by heat source to heat exchanger 9 and consisting of a turbine 11 with an electric generator, a condenser 12 connected together with a heat exchanger 10 to heat sink 13, and a pump 14. At the same time, regenerative contact heat exchangers 2 and 7 communicate with each other through the surface heat exchanger 15 and the intermediate circuits 16 and 17, which are connected with a jumper to the pump 18.

The method is implemented as follows.

The non-condensed working fluid is compressed in compressor 1 and sent to a regenerative contact heat exchanger 2, where regenerative heating of the mixture of non-condensable and condensable working bodies takes place when it contacts the intermediate liquid condensed working medium heated in the regeneration system and 10

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condensed liquid working fluid. The heated mixture is expanded in a turbine / 6, generating electricity. The exhausted mixture enters the regenerative contact heat exchanger 7, where it is brought into contact with an intermediate condensed liquid body cooled in a regeneration system. In this case, the intermediate body is heated, and part of the vapor condenses the working body from the mixture. In the surface heat exchangers 9 and 10, the mixture is cooled with condensation of the condensable body vapor from it, which is fed by the pump 8 to the heat source 3. At the same time in the heat exchanger

The heat is retracted into the auxiliary steam circuit, thereby evaporating the low boiling working fluid, which expands in the turbine 11, condenses in the condenser 12 and is pumped back to the heat exchanger 9 by the pump. Heat from the heat exchanger

10 and condenser 12 are led to heat drain 13.

From the heat exchanger 10, the noncondensable working fluid released to a certain extent from the vapor of the condensed body is supplied for compression to the compressor 1 and the cycle is closed. The flows of the intermediate working fluid circulated in circuits 17 and 16, which are heated in the heat exchanger 2, are exchanged with heat in the heat exchanger 15. A portion of the condensed working fluid, evaporating in the heat exchanger 2 and condensing in the heat exchanger 7, is transferred from circuit 17 to circuit 16 by means of a jumper with a pump 18.

As non-condensable heat from the circuit 16. In this case, the exchanger can be used

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condensed liquid working fluid. The heated mixture expands in the turbine. 6, generate electricity. The exhausted mixture enters the regenerative contact heat exchanger 7, where it is brought into contact with an intermediate condensed liquid body cooled in a regeneration system. In this case, the intermediate body is heated, and part of the vapor condenses the working body from the mixture. In the surface heat exchangers 9 and 10, the mixture is cooled with condensation of the condensable body vapor from it, which is fed by the pump 8 to the heat source 3. At the same time in the heat exchanger

The heat is retracted into the auxiliary steam circuit, thereby evaporating the low boiling working fluid, which expands in the turbine 11, condenses in the condenser 12 and is pumped back to the heat exchanger 9 by the pump. Heat from the heat exchanger

10 and condenser 12 are led to heat drain 13.

From the heat exchanger 10, the non-condensable working fluid, freed to a certain extent from the vapor of the condensed body, is supplied to the compressor 1 for compression and the cycle is closed. At the same time, the flows of intermediate working medium circulating in circuits 17 and 16, heated in heat exchanger 7 and cooled in heat exchanger 2, exchange heat in heat exchanger 15. A part of condensed working fluid evaporating in heat exchanger 2 and condensing in heat exchanger 7 is transferred from circuit 17 to circuit 16 on the jumper with pump 18.

As non-condensable heat exchanger can be used

the interstitial body evaporates and cools, and the vapor content of the condensable body increases in the mixture. In the contact heat exchanger 4, the mixture is heated in contact with the liquid condensed body heated in the heat source 3. At the same time, the latter is evaporated and its vapor content in the mixture increases.

In the surface heat exchanger 5, the mixture is heated by the heat coming from the source 3, while the heat carrier may be

condensate is sodium-potassium alloy, and the working medium of the auxiliary steam-power circuit is water.

The invention makes it possible to increase the efficiency of the gas turbine installation by using in the regeneration system a condensable working fluid that comes into contact

with a mixture of working fluids, as well as heating the mixture when it is in contact with a condensable body heated in a heat source.

Claims (1)

The method of operation of a closed gas turbine installation by compressing separately non-condensable and liquid condensable working fluids, regenerative heating of the working fluids mixture, heating the mixture from a heat source in the surface heat exchanger, expanding the mixture with performing useful work, regenerative cooling of the mixture and cooling the mixture in the surface a heat exchanger with condensation of a condensable working fluid, characterized in that, in order to increase efficiency, a compressed liquid condensable working fluid five the body is heated in a source of heat, and before the mixture is heated from a source of heat in surface heat exchange. It is heated on contact with the condensed liquid body heated in the heat source to evaporate it, while the mixture is regeneratively cooled by contacting the mixture with the intermediate liquid condensed body while heating and condensing it from the mixture of the body being condensed, and the mixture is heated contact of the mixture with the intermediate condensed liquid body with its cooling and evaporation.