Combined cycle energy supply system

Abstract

The invention provides a combined cycle energy supply system, and belongs to the technical field of thermal energy utilization and heat pumps. A steam power device forward cycle system is composed of a turbine, a boiler, a condenser and a cycle pump. A compression type reverse cycle system is composed of a compressor, a cooler, an expansion machine, a low-temperature heat exchanger and a heat regenerator. An absorption type reverse cycle system is composed of an evaporator, an absorber, a generator, a condenser, a throttle valve, a solution pump and a solution heat exchanger. The steam power device forward cycle system provides power for the compression type reverse cycle system or provides a driving heat load for the absorption type reverse cycle system. The compression type reverse cycle system obtains the low-temperature thermal load and supplies heat to the outside through the cooler. The absorption type reverse cycle system absorbs the low-temperature thermal load and supplies heat to the outside through the absorber and the condenser, and the combined cycle energy supply system is formed.

Description

Technical field: [0001] The invention belongs to the technical field of power, refrigeration and heat pump. Background technique: [0002] In the system where fuel is used for heating by combustion, there is a large temperature difference between the gas formed by combustion and the heated medium; There is also a large temperature difference; in a distributed energy system powered by a steam power plant, power supply is actually a restrictive additional condition, and there are still situations where the temperature difference cannot be fully utilized in many cases. These situations that cannot realize efficient utilization of thermal energy can be mainly summarized into five aspects: ①Without power load, there is a large temperature difference between the gas and the heated medium that cannot be utilized, and efficient utilization of thermal energy cannot be realized; ②Absorption heat pump is configured , due to the limitation of the working temperature range of the absorp...

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Problems solved by technology

[0002] In the system where fuel is used for heating by combustion, there is a large temperature difference between the gas formed by combustion and the heated medium; There is also a large temperature difference; in a distributed energy system powered by a steam power plant, power supply is actually a restrictive additional condition, and there are still situations where the temperature difference cannot be fully utilized in many cases

These situations that cannot realize efficient utilization of thermal energy can be mainly summarized into five aspects: ①Without power load, there is a large temperature difference between the gas and the heated medium that cannot be utilized, and efficient utilization of thermal energy cannot be realized; ②Absorption heat pump is configured , due to the limitation of the working temperature range of the absorption heat pump working medium, there is a large temperature difference between the driving gas and the absorption heat pump working medium, and the use of the temperature difference is unreasonable; There is a large temperature difference; in this way, when using steam to drive the absorption heat pump, the use of temperature difference is unreasonable; ④Lack of low-temperature heat resources, it is difficult to use the heat energy in the environment; ⑤When the temperature of low-temperature heat resources is very low, it is impossible to find a suitable absorption heat pump device Working medium with satisfactory thermal performance and safety performance

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