A gas-air source thermoacoustic heat pump system

Abstract

The invention provides a gas-air source thermo-acoustic heat pump system which comprises a gas and air mixing device, a high-temperature combustor, a thermo-acoustic engine, a harmonic oscillator, a thermo-acoustic heat pump and four-way valves. One end of the high-temperature combustor is connected with the air mixing device. The other end of the high-temperature combustor is connected with one end of the thermo-acoustic engine through a high-temperature heat exchanger. The other end of the thermo-acoustic engine is connected with the thermo-acoustic heat pump through the harmonic oscillator.An opening C of the first four-way valve is connected with a low-temperature heat exchanger. An opening A of the first four-way valve is connected with a heat exchanger of the thermo-acoustic engineand an intermediate-temperature heat exchanger through a first water pump. An opening B of the first four-way valve is connected with an outdoor heat exchanger. An opening D of the first four-way valve is connected with an indoor heat exchanger. According to the gas-air source thermo-acoustic heat pump system, a high-temperature heat source obtained through natural gas and air mixed combustion isutilized for driving the thermo-acoustic engine, the thermo-acoustic engine is utilized for driving the thermo-acoustic heat pump, the thermo-acoustic heat pump is connected with the low-temperature heat exchanger, and the thermo-acoustic heat pump absorbs heat from the outdoor environment through the low-temperature heat exchanger and outputs heat through the indoor heat exchanger.

Description

technical field [0001] The invention relates to the field of clean heating and efficient utilization of energy, in particular to a gas air source thermoacoustic heat pump system. Background technique [0002] Gas heat pump technology is a new type of heat pump technology. It uses gas as the driving energy to pump the heat in the outdoor environment to the high temperature end to achieve heating efficiency. It has the advantages of energy saving, environmental protection and no pollution. It responds to the national coal-to-gas conversion. Therefore, it has broad application prospects. The existing gas heat pump technologies are mainly lithium bromide-water absorption heat pump technology and ammonia-based working fluid pair absorption heat pump technology. The core components of traditional absorption heat pumps include generator, condenser, evaporator, absorber, solution pump, Expansion valve and solution heat exchanger. Driven by the high-temperature hot water or steam (...

AI Technical Summary

Problems solved by technology

However, if the absorption heat pump is used for gas heating, there will be three problems: one is that the lithium bromide heat pump uses water as the working medium, so its working temperature cannot be lower than 0°C, otherwise it will freeze; When the temperature is large, the efficiency of the absorption heat pump drops sharply, and it can hardly work when the temperature difference is above 50°C, and the heating coefficient is less than 1; the third is that the lithium bromide heat pump can only use the heat below 200°C, so it cannot make full use of the heat generated by natural gas combustion. high temperature heat Therefore, under a large temperature difference, the fuel consumption is large and the operating cost is high.

However, because this method increases the complexity of the system, it is also restricted

[0004] Some people also proposed to adopt two-stage air source absorption heat pump and two-stage coupled absorption heat pump technology, but because the system is too complicated, the size is too large, not compact enough, the cost increases, and the ammonia working fluid is toxic and explosive, it is not suitable for household decentralized heating , and therefore have not been widely used

[0005] Some people also proposed to use compressed air source heat pump technology, but this technology has many internal mechanical moving parts, the size is too large, and is restricted by efficiency, life and size, so it has not been widely used

Images