Water-hydrogen electricity generation heat pump air-conditioning system for communication base station and heating and refrigeration method

Abstract

The invention discloses a water-hydrogen electricity generation heat pump air-conditioning system for a communication base station. The system comprises a compressor, a four-way reversing valve, a heat exchanger inside a machine room, a throttle valve, a heat exchanger outside the machine room, a methanol-water storage vessel, a conveying pump, a reformer, a fuel cell, an electric power conversion system, communication equipment and an air and residual gas mixer, wherein the reformer generates high-temperature residual gas and discharges the high-temperature residual gas to the air and residual gas mixer or to the outside; the air and residual gas mixer is used for mixing external air with the high-temperature residual gas into medium-temperature mixed gas and outputting the medium-temperature mixed gas to the heat exchanger outside the machine room; the fuel cell is used for carrying out electrochemical reaction of hydrogen and oxygen to generate electric energy for output; the electric power conversion system is used for converting the electric energy output by the fuel cell into electricity required by loads to supply power to the compressor, the conveying pump and the communication equipment of the communication base station. Under heating conditions, when outdoor air is below minus 5 DEG, the system can still work normally and efficiently, and an evaporator cannot be frosted; and the system can meet power supply to the communication equipment, does not need power supply from an external grid and is free of geographic restrictions.

Description

technical field [0001] The invention relates to the technical field of heat pump air conditioners, in particular to a water-hydrogen power generation heat pump air conditioner system and a heating and cooling method for communication base stations. Background technique [0002] The power system of the communication base station is composed of five parts: power transformation and distribution, generator set, UPS, battery and 48V (24V) DC power supply. The duration is determined by the electrical storage capacity of the battery pack. Once the power of the battery pack is insufficient, gasoline and diesel generators must be used to generate power to ensure long-term power supply for mobile communication base stations. The current backup power supply for communication base stations mainly uses lead-acid batteries. The service life is generally only 3-5 years, and a small base station requires 1.5 tons of lead-acid batteries, which can easily cause lead pollution. Moreover, if t...

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Problems solved by technology

[0004] 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

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