Gas heat-pump energy supplying system based on power generation of third working medium

Abstract

The invention discloses a gas heat-pump energy supplying system based on power generation of a third working medium. The principle and the structure of the gas heat-pump energy supplying system are as follows: a heat pump system formed by connecting a compressor, a condenser, an electric expansion valve and an evaporator in sequence is driven by a gas engine; and a waste heat recovery and circle power generation system comprises a gas-engine cylinder sleeve heat exchanger, a gas waste-heat heat exchanger, a turbine, an engine, a cooler, a liquid storage tank and a circulating pump and the like. The heat pump system and the waste heat recovery and circle power generation system are connected together by a second stop valve and a third stop valve. After absorbing the waste heat of the engine from the condenser, the gas-engine cylinder sleeve heat exchanger and the gas waste-heat heat exchanger, the third working medium enters into the turbine for doing work so as to drive a power generator to generate power. The gas heat-pump energy supplying system disclosed by the invention has the advantages that primary energy input of natural gas is adopted, and off-grid independent operation can be realized by the waste heat recovery and circle power generation system, so that the efficiency and the stability of the system are greatly improved, simultaneously the operating cost of the system is reduced, and the economic and energy-saving effects are achieved.

Description

technical field [0001] The invention belongs to the technical field of cogeneration of cooling, heating and power, and in particular relates to a cogeneration operation system device of cooling, heating and power for generating electricity by using waste heat. Background technique [0002] The power supply shortage caused by the sharp increase of air-conditioning load in summer has caused the power grid to be overwhelmed, so the gas heat pump system using natural gas as energy has attracted more and more attention. The gas engine heat pump system can recover the waste heat of the gas engine, and its primary energy utilization rate is higher than that of the grid heat pump, and the energy saving effect is very obvious. The waste heat from gas engines is mainly used for auxiliary heating and less for cooling. At the same time, the auxiliary equipment of ordinary gas engine heat pump systems, such as fans and water pumps, still need to be driven by grid power. This will greatl...

AI Technical Summary

Problems solved by technology

At the same time, the auxiliary equipment of ordinary gas engine heat pump systems, such as fans and water pumps, still need to be driven by grid power. This will greatly limit the development and utilization of gas heat pumps in areas where natural gas resources are abundant and electricity is relatively scarce.

Images