China's ground source heat pump central air conditioning market

China's ground-source heat pump central air-conditioning market ground source heat pump central air conditioning is the use of a type of ground source heat pump technology, an air conditioner, this air conditioning has a characteristic of low energy consumption, pollution-free. Ground source heat pump technology originated in the 1920s in Europe, is the use of water source heat pump in a form that is the use of water and ground energy (groundwater, soil or surface water) for cold and heat exchange as a water source heat pump cold source, winter The heat in the ground "take" out, for indoor heating, at this time for the "heat source"; summer to remove indoor heat, released into the groundwater, soil or surface water, at this time can be "cold source." At present, the rapid development in Europe and the United States and other countries, the market share was as high as 35%. 2. Ground source heat pump heating central air conditioning system components: ground source heat pump heating air conditioning system is divided into three parts: outdoor heat exchange system, water source heat pump units and indoor heating air conditioning end system. Water source heat pump which there are two main forms: water - water or water - air type. Between the three systems by water or air heat transfer medium for heat transfer, water source heat pump and ground heat exchanger medium is water, and building heating and air conditioning at the end of the heat transfer medium can be water or air. 3. Ground Source System Classification According to the different ways of outdoor heat exchange can be divided into three categories: (1) soil buried pipe system, (2) groundwater system, (3) surface water system. According to whether the circulating water is a closed system, the ground can be divided into closed-loop and open-loop system. Closed-loop systems such as buried coil (vertical or horizontal buried pipe), surface water to place the heat exchanger. Open-loop systems such as pumping groundwater or surface water. In addition, there is a "direct expansion" that does not use intermediate water to transfer heat as the system described above. Instead, a heat exchanger (evaporator) of the heat pump is directly buried for heat exchange.