A combined cooling, heating and power generation system driven by low-grade waste heat

Abstract

The invention relates to a cogeneration system of cooling, heating and power driven by low-grade waste heat, which includes an organic Rankine cycle unit, which is composed of a working medium pump, an evaporator, an expander, and a built-in heat pump cycle connected in sequence to form a cycle. Unit composition, the built-in heat pump circulation unit includes a first heat exchanger, a throttle valve, a second heat exchanger, a compressor and a four-way reversing valve, the evaporator and the first heat exchanger in the built-in heat pump circulation unit , The second heat exchanger performs heat exchange with the waste heat flow and the external heat exchange flow respectively, and the output power end of the expander is respectively connected to the compressor and the generator; when the system is running, the work done by the expander is prioritized to drive the coaxial connection with it The compressor realizes the cold or heat output of the built-in heat pump cycle unit, and the remaining part of the work drives the generator to generate electricity, thereby realizing the combined cooling, heating and power generation of the system. Compared with the prior art, the present invention has the advantages of simple process, less equipment parts, high utilization rate of waste heat energy, low system device cost and the like.

Description

technical field [0001] The invention relates to a cogeneration system of cooling, heating and power, in particular to a cogeneration system of cooling, heating and power driven by low-grade waste heat. Background technique [0002] With the rapid development of industrialization and urbanization, my country's energy consumption continues to rise, and the resulting environmental burden is also increasing. Therefore, increasing energy conservation and consumption reduction, further improving energy utilization efficiency, and vigorously developing renewable energy are the key to establishing a resource-saving and environment-friendly industrial structure and production mode in China, as well as breaking the constraints of energy resources and the environment, and taking a new path of industrialization with Chinese characteristics. inevitable choice. [0003] Renewable energy such as low-grade industrial waste heat, solar energy, and geothermal energy has gradually attracted p...

AI Technical Summary

Problems solved by technology

The combined heat and power system realizes the recovery and utilization of low-grade waste heat, and also realizes the cogeneration of heat and electricity. However, the organic Rankine cycle subsystem and the heat pump cycle subsystem in this system are relatively independent, which not only makes the organic Rankine cycle The energy of the circulation subsystem is easy to lose, and it also increases the number of components in the entire system, the process is not simplified enough, and the cost of the entire system is relatively high

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