Variable heat energy recovery system and method for cogeneration unit

Abstract

The invention relates to a system and method for recovering variable heat energy of a cogeneration unit, comprising a gas internal combustion engine, the gas internal combustion engine is provided with a water pump, a cooler, and a cylinder liner, and the exhaust port of the gas internal combustion engine passes through a first valve and a second valve. The inlet end of the first passage of a heat exchanger is connected, the cylinder liner is connected with the inlet end of the second passage of the first heat exchanger, and the outlet end of the second passage of the first heat exchanger is connected to the second passage through the second valve. The inlet end of the first passage of the second heat exchanger is connected, the second valve is connected with the third valve, the outlet end of the first passage of the second heat exchanger is connected with the third valve, and the third valve The first radiator is connected to the water pump, and the heat recovered by the first heat exchanger and the heat exchanged by the second heat exchanger are controlled according to the opening degrees of the first valve, the second valve and the third valve. . The invention can meet the needs of customers for different heat.

Description

technical field [0001] The invention relates to the technical field of heat and power cogeneration, in particular to a system and method for recovering variable heat energy of a heat and power cogeneration unit. Background technique [0002] The gas cogeneration system is a new type of energy system, which mainly uses combustible gases such as natural gas, biogas or coal bed methane to burn and generate power, and recovers the waste heat after combustion to be used for cooling, heating, hot water or steam production . Compared with conventional energy supply systems, it has the advantages of high comprehensive efficiency, energy saving and environmental protection, safety and reliability, and good economy. [0003] With the advancement of energy utilization technology, gas-fired combined cooling, heating and power systems are being used more and more due to their proximity to customers, low loss, high comprehensive energy efficiency, and energy supply security. At present,...

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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is to overcome the problems in the prior art that the recovered heat is fixed and the application scenarios and market volume are small, so as to provide a controllable recovery of heat energy, reduce the investment of the peripheral heat storage system, and meet the needs of customers. Variable heat energy recovery system and method for cogeneration units with different heat demands

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