Ground source heat pump working principle, classification and their applications
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Heat pump works As a natural phenomenon, as the flow of water from the lower height, as heat always flows from high temperature. But people can create the machine, as the water from the lower elevated to high and using pumps as heat pump can pump heat from low to high temperature. Therefore, the heat pump is essentially a lifter, a part of its own consumption of energy, the environment, the energy storage medium to be mining, improve the temperature position to use, and the entire heat pump consumes power only for one-third of the heat , or less, which is characteristic of energy saving heat pumps.
Heat pump and refrigeration system equipment theory and composition and function is the same, on heat pump (cooling) system consists of compressor, evaporator, condenser and throttle components:
Compression and transmission cycle of the compressor plays a working fluid from the low temperature low pressure to high pressure and temperature Office Agency's role, is the heat pump (cooling) system of the heart;
Evaporator is the cooling capacity output of the device, its role is to flow through the throttle the liquid refrigerant evaporates to absorb heat by cooling the object to achieve the purpose of refrigeration;
Condenser is a heat output of the device, from the evaporator to absorb heat from the compressor together with the consumption of power by the conversion of heat in the condenser cooling medium was removed, to achieve the purpose of heating;
Expansion valve or throttle valve on the refrigerant cycle of blood pressure play a role in reducing expenditure, and adjust the cycle of the evaporator refrigerant flow.
According to second law of thermodynamics, compressor power consumption (energy) play a compensation, so that working fluid cycle continuously absorbs heat from the low-temperature environment, and to high temperature heat, weeks and cycle back and forth manner.
Heat pump Category Condenser heat pump is required, the evaporator from the environment to take heat, then get hot objects from the environment as heat source; contrary refrigeration is required cooling capacity of evaporator, condenser then heat to the environment, At this time the object of heat to the environment as cold source.
Evaporator condenser working fluid and the environment under the heat cycle of different media, mainly into air and water heat exchanger in two forms. This heat pump or refrigerator and the environment under the different heat transfer media can be divided into water? Water type, water? Air type of air? Water type, and air? Air type of four.
Use of hot and cold air as the source of the heat pump, called the air-source heat pump. Air source heat pump has a long history, and its very easy to install and use, wider applications. However, regional differences in air temperature in the range of the typical application area south of the Yangtze River. In North China, the winter average temperature below zero degrees Celsius, the air source heat pumps not only in severe conditions, poor stability, but also because of frost problems, efficiency is low. Use of water for hot and cold
source heat pump, called the water source heat pump. Water is an excellent heat source, the heat capacity, heat transfer performance, general efficiency water source heat pump heating or cooling capacity than air source heat pump, but because of water restrictions, water source heat pumps and air source heat pump applications far.
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