Heat and power combined system

Abstract

The invention provides a heat and power combined system, and belongs to the technical field of distribution energy. The heat and power combined system comprises a heat source output opening, an evaporator, a heat exchanger and a heat source input opening which are in pipeline connection in sequence, and a first cycle is formed; a first medium is arranged in a pipeline of the first cycle, the heatand power combined system further comprises a heat pipe network output opening, a condenser, the heat exchanger and a heat pipe network input opening which are in pipeline connection in sequence, a second cycle is formed, and a second medium is arranged in the pipeline of the second cycle. The heat and power combined system further comprises an expander output opening, the condenser, the evaporator and an expander input opening which are in pipeline connection in sequence, an engine cycle is formed, and a working medium is arranged in a pipeline of the engine cycle; and the evaporator is usedfor heat transmission between the first cycle and the engine cycle, the condenser is used for heat transmission between the second cycle and the engine cycle, and the heat exchanger is used for heat transmission between the first cycle and the second cycle.

Description

technical field [0001] The invention relates to the technical field of distributed energy sources, in particular to a cogeneration system of heat and power. Background technique [0002] At present, in northern China, district heating systems are mostly used to meet people's heating and domestic hot water needs in winter. [0003] District heating systems generally include a heat source and a heat pipe network in which water is used as a medium and circulated in the heat pipe network. Heat the water in the heat pipe network through the heat source, use hot water to provide heating for buildings in a certain area, or directly use hot water as domestic hot water for people to use. [0004] However, the heat generated by the heat source is usually much higher than the heat required by the heat pipe network, and the district heating system will generate a large irreversible heat loss in the actual use process, resulting in a large energy loss, that is, the existing district hea...

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Problems solved by technology

[0004] However, the heat generated by the heat source is usually much higher than the heat required by the heat pipe network, and the district heating system will generate a large irreversible heat loss in the actual use process, resulting in a large energy loss, that is, the existing district heating The energy efficiency of the system for the heat source is relatively low

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