Heat pump air conditioning and heating and cooling methods based on methanol water reforming hydrogen production power generation system

Abstract

A heat pump air conditioner using a methanol-water reforming power generation system, the heat pump air conditioner comprising: a compressor (1), a four-way directional control valve (2), an indoor heat exchanger (3), a throttling valve (4), an outdoor heat exchanger (5), a methanol-water container (6), a transport pump (7), a reformer (8), a fuel cell (9), a power conversion device (10) and an air / residual air mixer (11). A high temperature residual air produced by the reformer (8) flows, through an exhaust air outlet, to the air / residual air mixer (11) or the outside. The air / residual air mixer (11) is used for mixing an outside air with the high temperature residual air to obtain a mixed air with lower temperature and to output the mixed air to the outdoor heat exchanger (5). The fuel cell (9) is used to enable an electrochemical reaction of hydrogen and oxygen from the air to generate a power output. The power conversion device (10) is used for converting the power output from the fuel cell (9) to supply power for the compressor (1) and the transport pump (7) to meet the load requirement. The heat pump air conditioner can maintain high operational performance under a heating condition even when the temperature of the outside air is below -5°C. An evaporator is also free from frost, thereby avoiding the need for regular defrosting and removing location restrictions for using the invention.

Description

technical field [0001] The invention relates to the technical field of heat pump air conditioners, in particular to a heat pump air conditioner and a heating and cooling method based on a methanol water reforming hydrogen production power generation system. Background technique [0002] As non-renewable energy sources such as coal, oil, and natural gas become less and less, air-energy heat pump air conditioners with very small power consumption have emerged as the times require. The principle of the air source heat pump is to use the inverse Carnot principle. Under the heating condition, the indoor heat exchanger is a condenser, and the outdoor heat exchanger is an evaporator. The evaporator absorbs heat from the ambient heat in the outdoor air to evaporate and transfer heat. Working medium, the pressure and temperature of the working medium vapor are increased after being compressed by the compressor. When the high-temperature steam is condensed into a liquid through the co...

AI Technical Summary

Problems solved by technology

[0003] However, the disadvantage of air source heat pumps is that the lower the outdoor air temperature, the smaller the heat supply, especially when the outdoor air temperature is lower than -5°C, the heat pump is difficult to work normally, and electricity or other auxiliary heat sources are needed to heat the air , the efficiency of the heat pump is greatly reduced

Under the heating condition of the air source heat pump, frost will form on the evaporator, and regular defrosting is required. For the defrosting module technology, please refer to Chinese patent application 201210152219.4 for defrosting method for air source heat pump system, 201410108455.5 for a heat pump air conditioner defrosting Control method and heat pump air-conditioning system. After adding a defrosting module to the air source heat pump, not only the stability is reduced, the maintenance cost is increased, but also a considerable part of energy is lost

In addition, the power source of existing heat pump air conditioners is usually the mains, so the use of existing heat pump air conditioners is subject to relatively large geographical restrictions

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