Combined cycle energy supply system

Abstract

The invention provides a combined cycle energy supply system and belongs to the technical field of heat energy utilization and heat pumps. A steam power device positive cycle system is formed by a turbine, a boiler, a heat exchanger and a circulating pump. A compression type reverse cycle system is formed by a compressor, a cooler, an expander, a low-temperature heat exchanger and a heat regenerator. An absorption type reverse cycle system is composed of an absorber, a second absorber, a generator, a second generator, a condenser, an evaporator, a throttling valve, a solution pump, a second solution pump, a solution heat exchanger and a second solution heat exchanger. The steam power device positive cycle supplies power to the compression type reverse cycle and supplies drive heat loads to the absorption type reverse cycle. The compression type reverse cycle acquires low-temperature heat loads and supplies heat through the cooler. The absorption type reverse cycle acquires low-temperature heat loads and supplies heat through the absorber, the second absorber and the condenser. Thus, the combined cycle heat 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 six aspects: ①Under the condition of no power load, there is a large unusable temperature difference between the gas and the heated medium, which cannot realize efficient utilization of thermal energy; ②Absorption heat pump is equipped , due to the limitation of the working temperature range of the absorpti...

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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 six aspects: ①Under the condition of no power load, there is a large unusable temperature difference between the gas and the heated medium, which cannot realize efficient utilization of thermal energy; ②Absorption heat pump is equipped , 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 The working medium with satisfactory thermal performance and safety performance; ⑥ It is difficult to achieve efficient heating or cooling in the low-temperature section of gas

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