At present, the civil air defense engineering is usually used in FRP
cooling tower, water source heat pump air conditioning system is based on the quantitative circulating water cooling tower intermediate medium, heat exchange with the outdoor air, through the heat pump technology, high outdoor air of low energy can be converted to energy, moistureproof dehumidifier for civil air defense engineering, essentially belongs to the air source heat pump (
System, the fatal weakness is controlled by climatic conditions, summer cooling efficiency and decreased with the temperature increasing of outdoor air, the winter temperature through low and cannot be achieved because of the large outdoor heating, overall efficiency is low.
The underground water source heat pump)
Directly by heat pump system, cancellation of cooling tower engineering and heat exchange of groundwater, avoid the influence of atmospheric temperature, do one dual-use, high efficiency and energy saving, can not only meet the summer of civil air defense engineering dehumidification problem, but also can be introduced into the ground engineering, solve the ground engineering winter and summer heating and cooling problem, has a good application prospect.
1 technical argumentation cooling tower, water source heat pump air conditioning system in essence belongs to the air source heat pump air conditioning system.
Air source heat pump air conditioning system, low energy comes from outdoor air, cooling conditions in the summer, heat pump need medium with low temperature air cooling condenser, the quantity of heat to the outdoor air, achieve the purpose of refrigeration, meet cool.
In winter heating conditions, heat pump need higher temperature of the air medium, take away the cold evaporator, achieve the purpose of heating, heating.
Nature of seasonal change of atmospheric temperature, however, contrary to heat season expectations, summer outdoor temperature is high, is not conducive to cooling condenser, refrigeration efficiency is lower;
Winter outdoor air temperature is low, is not conducive to take away the cold evaporator, heating efficiency is reduced, the overall efficiency is low, this is the air source heat pump air conditioning system can overcome technical barriers.
Civil air defense project is a closed space, underground heat pump air conditioning system can't directly with the outdoor air heat exchanger, only to quantitative circulating water as medium, through the cooling tower and the outdoor air heat transfer on the ground, refrigeration, meet the dehumidification.
But since the summer outdoor air temperature is higher, the temperature of the circulating water cooling tower quantitative also will rise, reducing the cooling efficiency of heat pump.
In winter, even if choose water
Water heat pump units, also is unable to realize heating, limitation is very big, so the cooling tower water source heat pump system is still unable to overcome the influence of atmospheric temperature technical barriers.
The earth is a huge thermostat, groundwater containing the inexhaustible energy.
According to the test, 30 meters below the ocean's surface and shallow groundwater temperature is stable at around 18 ℃, far higher than outdoor air temperature in winter, and far less than the summer outdoor air temperature, if the use of groundwater heat pump air conditioning system of civil air defense engineering as low energy, can overcome the technical barriers of air source heat pump, greatly improving the overall efficiency of the system.
In addition, in the summer, through the heat pump technology to convert low cold quantity of groundwater into high cold quantity, at the same time, the civil air defense engineering heat passed to groundwater recharge technology;
And winter through the heat pump technology, and the groundwater low quantity of heat into the high quantity of heat, cold quantity by injection technology at the same time to the groundwater, in this way, the amount of cold winter for the summer, heat Xia Cun winter use, groundwater will have the effect of accumulator, to ensure the perennial use of air conditioning system.
So, the underground water source heat pump system, low energy of groundwater, groundwater heat pump directly with the temperature is stable in hot, is not subject to the influence of atmospheric temperature, overcome the technical barriers of air source heat pump system, realize one machine amphibious, saving investment, integrated operation cost is low, suitable for groundwater resource-rich area of civil air defense engineering air conditioning system.
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