Water heater and solar air heaters compared to Aspects of the air – water heater
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Air to water heaters, heat pump works is to use a compression heat pump installations, mainly evaporator, compressor, condenser and expansion valve, four-part, been completed by allowing evaporation of refrigerant (absorb heat from the environment) compression condensation (releases heat) cutting re-evaporation of the thermal cycle process, which will transfer heat to the environment, water, heat pump in the work, the environmental media, the energy stored in QA to be absorbed in the evaporator; its own part of energy consumption, that compressor power QB; through the refrigerant in the condenser for heat circulation QC, QC = QA + QB, this can be seen that the output energy for the heat pump compressor and heat pump to do the power QB the heat absorbed from the environment QA; Therefore, using heat pump technology can save a lot of energy. History heat pump technology development with the industrial revolution, the early 19th century, people can lower the temperature of the heat from the media the "pump" sent to the media at high temperature occurred in this matter interest. JPJoule British physicist put forward "by changing the pressure of compressible fluid temperature change can make it" principle. 1854, W. Thomson, Professor (that is well-known LordKelvin Lord) Papers presented heat multiplier (HeatMultiplier) concept, first described the idea of absorption heat pump air in the low heat, heat exchange medium through the middle, and compressed into high temperature gases, the circulatory system through the water heating pipe, electric water heater power consumption is only 1 / 4. The new product to avoid the adoption of solar water heaters rely on the sun heat and inconvenience of installation shortcomings. As the air to water heater is to heat transfer through the media, so it does not need electric heating element in contact with water, no electric water heater short circuit, nor gas water heater may be the risk of explosion and poisoning, and no emissions caused by fuel heater air pollution.
Air to water heater is to use the principle of heat pump heating, and air-conditioning cooling the opposite?? State refrigeration standard is 1000 watts 2800 watts electric refrigeration. According to the principle of heat balance, while at least 2,800 watts of heat generated, together with the input 1000 watts of electricity, the actual heat tiles in 3000-4000, to the heat transport to heat the water tank, electric water heater of its power consumption is only a quarter (electric water heater even if 100% thermal efficiency, input 1000 watts of electricity is only 1000 watts of heat).
Air to water heaters do not need the sun, it can be at home or outdoors. Solar water heater storage used up, hard to immediately produce hot water. If the electric heating has a very long time, the air can be as long as the air heater, the temperature at -7 to 43 degrees Celsius, pressure can be run 24 hours a day. Thus, even if the used a box of water (60 liters), about half an hour will produce a box of hot water again. It also virtually eliminating the electric water heater electric leakage, dry and use gas water heater produces harmful gases and other security risks, overcome the rainy days can not use solar water heater and installation inconvenience and other shortcomings, high security, high-energy, long life do not discharge toxic gases and many other advantages. Air to water heater life can generally reach 15 to 20 years.
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