Ground source heat pump technology, is a use of shallow soil in room temperature energy as the energy efficiency and energy saving, no pollution, low running cost can be heating and cooling, and can provide sanitary hot water air conditioning technology. Ground source heat pump system using underground soil year-round temperature relatively stable characteristics, through the buried buildings surrounding the tube and the interior of the building is completed to coupling heat exchange device. The winter by heat pump will be in the earth of low heat energy to improve the quality of heating of buildings, while the buildings within the cold storage to the underground, for use by a heat pump refrigerating in summer; summer building internal heat transfer to the underground of building cooling, heat storage at the same time, to prepare for winter heating use. If the hot summer and cold winter zone refrigeration and heating degree days are basically the same, cooling and heating load is approximately the same, using the same system, can give full play to the role of underground energy storage, but also supply life hot water. So ground-source heat pump technology called twenty-first Century" green air conditioning technology", ground-source heat pump central air-conditioning system has become the best scheme of central air conditioner.

Ground source heat pump working principle

Ground source heat pump is the use of water source heat pump is a kind of form, it is the use of water and earth ( soil or groundwater, surface water ) for heat exchange to as cold heat sources of heat pump, the heat in the winter can" take", supply indoor heating, this time for the" summer heat"; the indoor heat out, released into the soil or groundwater, surface water, this time for" cold source".

Ground source heat pump air conditioning system is mainly divided into three parts: air can heat exchange system, a water source heat pump unit and indoor heating and air conditioning system. The water source heat pump machine mainly has two kinds of forms: water - water or water / air type. Between the three systems by water or air heat transfer medium for transferring heat, water source heat pump and ground energy between heat transfer medium is water, and building heating and air conditioning terminal heat transfer medium can be water or air.

Ground source heat pump working principle:

In nature, water will flow from a low height, the heat is always transferred from high temperature to low temperature. People can pump water drawn from the lower to higher, realize water upward from the lower flow, heat pump can also take heat from low temperature to high temperature transmission. So heat pump is essentially a heat lifting device, when it consumes a few electric energy, can from the environmental medium ( water, air, soil and other ) extracting4-7 times the electricity, elevating the temperature for use, this is also the reason of heat pump energy saving. Ground source heat pump heat pump is one kind, is a land or water as cold and heat source of buildings, cool in summer and warm in winter and air conditioning technology, ground source heat pump is on the earth and between indoor" transfer" energy. Use minimum power to maintain the indoor temperature required. In the winter,1 kilowatts of electricity, will the soil or water in4-5kilowatts of heat into the interior. In the summer, reverse the process, heat is transferred to the soil or water pump, so that the indoor air is cool. Underground gained energy will be in the winter is obtained by using the. So go round and begin again, building space and nature into one. With a minimum of low to get the most comfortable living environment.

Principle of heat pump:

Heat pump device mainly are: compressor, condenser, evaporator, expansion valve is composed of four parts, by making the liquid refrigerant ( refrigerant or refrigerant) to complete: evaporation ( absorb the heat in the environment ) to compression to condensation ( heat ), throttle, and then evaporating the thermodynamic cycle process, thereby the heat environment transfer to water. Compressor ( Compressor ): plays the compressing and conveying refrigerant from the low pressure and low temperature to high temperature and high pressure the function, is a heat pump ( refrigeration ) system of the heart; the evaporator ( Evaporator ): is the output capacity of cooling equipment, it is the role of the throttle valve into the liquid refrigerant evaporation, to absorb the cooled object heat, to achieve the purpose of refrigeration; condenser ( Condenser ): is the output of heat equipment, from the evaporator absorbs heat together with the compressor power consumption transformed by heat in the condenser cooling medium away, achieve the purpose of heating; expansion valve ( Expansion Valve ) or throttle valve ( Throttle ): on the circulating refrigerant the role of throttling decompression, and regulate the refrigerant flow into the evaporator. According to the second law of thermodynamics, the compressor consumed power ( electricity) to compensation, the refrigerant continuously from low temperature to high temperature environment and the heat absorption, heat release, and to and fro circulation

Ground source heat pump principle:

Ground source heat pump is the use of water and earth ( soil or groundwater, surface water ) for heat exchange for ground source heat pump cold heat source, the heat in the winter can" take", supply indoor heating, this time for" summer heat"; the indoor heat out, released into groundwater, soil or surface water, this time for" cold source".

Benefits: environmental protection and clean energy, especially the need for LEED certified building, should be very suitable.

Disadvantages: the stability of the system, gets the influence of geological conditions of relatively large initial investment, compared with the traditional air conditioning system is not low.