Solar assisted ejector synergized steam compression type heat pump circulating system and method

Abstract

The invention provides a solar assisted ejector synergized steam compression type heat pump circulating system and method. The system comprises a compressor and a condenser which are connected with each other; the outlet of the condenser is divided into two paths; one path passes through a stop valve to be connected with the inlet of a booster pump; the outlet of the booster pump is connected with a solar heat collector / generator inlet; a solar heat collector / generator outlet is connected with an ejector working fluid inlet; the other path is connected with an expansion valve inlet and an expansion valve outlet is connected with an evaporator inlet; an evaporator outlet is divided into two paths; one path passes through the stop valve to be connected with an ejector driving fluid inlet, and the other path passes through the stop valve to be connected with a gas suction opening of the compressor; an ejector outlet passes through the stop valve to be connected with the gas suction opening of the compressor. According to the system, high-pressure working fluid is provided for an ejector by using a solar heat collector / generator, and low-temprature refrigerating agent gas at the evaporator outlet is ejected into the ejector, and the gas suction pressure of the compressor is improved, so that the power consumption of the compressor in the cycle is reduced, the gas outlet amount is improved, and the performance of the heat pump circulating system is improved.

Description

technical field [0001] The invention belongs to the technical field of heat pumps, and in particular relates to a vapor compression heat pump cycle system and a method for increasing the efficiency of solar-assisted injectors of a heat pump device. Background technique [0002] The air source vapor compression heat pump cycle system is a system that uses the reverse Carnot cycle principle to absorb the energy in the low-temperature air to heat air or hot water. It has the characteristics of high efficiency and energy saving, so it is favored by the people and businesses. However, in recent years, with the rapid growth of energy demand, the increasingly prominent environmental and climate issues and the development of low-carbon economy, higher requirements have been put forward for the heat pump cycle system in terms of energy saving and environmental protection. Therefore, how to improve the energy efficiency of the heat pump cycle system become the direction of its develop...

AI Technical Summary

Problems solved by technology

However, the existing methods mostly use a hot water circulation system to couple solar energy with a vapor compression heat pump circulation system. The equipment is relatively complicated, the investment, operation and maintenance costs are high, and the working ability of solar energy as a high-grade energy is wasted.

Because of its simple structure, low cost, and no moving parts, the ejector is suitable for use under any fluid including two-phase flow, so some people have also proposed a jet heat pump cycle system driven by solar energy. However, due to the working pressure of the ejector The difference is small, the efficiency of the injector is low, resulting in low efficiency of the whole circulation system

Images