Shipborne heat pump air-conditioning system and heating and refrigeration method

Abstract

The invention discloses a shipborne heat pump air-conditioning system which comprises a compressor, a four-way reversing valve, a cabin internal heat exchanger, a throttling valve, a cabin external heat exchanger, a methyl alcohol water storage container, at least two conveying pumps, at least two methyl alcohol water reforming hydrogen production electricity generation modules, a power conversion system, a ship propelling system and an air and residual gas mixer.The methyl alcohol water reforming hydrogen production electricity generation modules integrate reformers and fuel batteries.High-temperature residual gas produced by the reformers is exhausted to the air and residual gas mixer or the outside world.The air and residual gas mixer is used for mixing external air with the high-temperature residual gas to be medium-temperature mixed gas which is conveyed to the cabin external heat exchanger.The fuel batteries are used for enabling hydrogen and oxygen to generate an electrochemical reaction to produce electric energy to be output.The power conversion system is used for converting electric energy output by the fuel batteries into electricity needed by loads, and the electricity is supplied to the compressor, the conveying pumps and the ship propelling system.On the heating working condition, when the temperature of outdoor air is lower than -5 DEG C, the shipborne heat pump air-conditioning system can still normally and efficiently work, and an evaporator will not frost.

Description

technical field [0001] The invention relates to the technical field of ship air-conditioning, in particular to a ship-mounted heat pump air-conditioning system and a heating and cooling method. Background technique [0002] At present, small and medium-sized ships such as civilian fishing boats and yachts are mainly powered by internal combustion engines. The main problem of internal combustion engines is that fuel combustion will produce waste gas that pollutes the environment, and fuel leakage will pollute waters. The impact of scenic spots is far greater than that of general areas. Moreover, the internal combustion engine will make a lot of noise when it is working, which will disturb the work, leisure and rest on board. In response to this problem, the technology of using fuel cells as power for ships has been gradually developed. Since the traditional marine air conditioner can use the heat of the fuel engine for heating, but the air conditioning system of the fuel ce...

AI Technical Summary

Problems solved by technology

However, the above-mentioned device using fuel cells as ship power and heat source has at least the following disadvantages: first, it only utilizes the heat emitted by the fuel cells to generate electricity, and does not utilize the heat of high-temperature residual gas discharged from the reformer, and the heat utilization rate is low; 2. The heat emitted by the fuel cell when generating electricity is directly dissipated into the cabin through the cooling system, which is independent of the ship's heat pump air-conditioning system. Therefore, when the air temperature outside the cabin is low, the ship's heat pump air-conditioning system is still difficult. To work normally, electricity or other auxiliary heat sources are needed to heat the air, the efficiency of the heat pump is greatly reduced, and there will still be frosting problems on the evaporator of the marine heat pump type air conditioning system

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