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Ground source heat pump is the use of shallow geothermal energy for heating and cooling energy use of new technology, is a heat pump, heat pump uses the reverse Carnot cycle Carnot cycle and the principle of cold and heat transfer equipment. Ground Source usually refers to transfer heat pump ground heat, or cold soil to the desired place. often are used as air conditioning heat pump, or heating purposes. ground source heat pump also use the underground soil thermal storage huge storage capacity, winter ground source to heat transfer in soil from the ground to the building, the cold summer, then transferred to the underground building, a year into a cold cycle.
Origin of Ground Source Heat Pump
"Ground-source heat pump" concept, first in 1912 by a Swiss expert, and made the technology began in Britain and the United States.
1946 in the United States in downtown Portland, Oregon completed the first ground-source heat pump system. But this did not lead to energy use patterns at the community wide attention, both in technology, in theory, not much development.
20 century 50's, Europe began to study ground source heat pump for the first time climax, but because energy prices are low, this system is not the economy, and therefore not be promoted. Until the 20th century, the early 70s the first time emerged in the world energy crisis, it began to be taken seriously, many companies began to source heat pump research, production and installation. During this period, the European level to establish a lot of ground source heat pump loop of pipe, mainly used for winter heating. Although Europe is the world's most sophisticated ground-source heat pump area, it has since installed heat pump experts do not understand technology, installers did not know how factors such as heat pump principle, resulting in the development of ground source heat pumps take some detours.
With the advances in technology, energy consumption and environmental pollution on the legal formulation of increasingly stringent, the development of ground source heat pump which ushered in yet another climax. European countries, Switzerland, Sweden and Austria and other countries represented, vigorously promote ground source heat pump heating and cooling technology. Government has taken appropriate subsidies and protection policies, making the production and use of ground source heat pump range expanded rapidly. The late 80s of last century, ground source heat pump technology has become mature, more research scientists dedicated to underground systems, efforts to improve the efficiency of heat absorption and heat conduction, while more and more attention to environmental impact. Ground source heat pump production increasing year by year, Switzerland and Sweden annual growth rate of over 10%. U.S. production and promotion of ground source heat pump fast, rapid development of technology had become the world's production and use of ground source heat pump number one power.
From the ground source heat pump application point of view, the Nordic country's major emphasis on winter heating, while the United States focus on for winter and summer together. Since the United States and China are very similar weather conditions, so the research application of the United States, ground source heat pump situation, the development of our ground source heat pump has a reference.
Ground Source Heat Pump Principle 1, refrigeration theory In cooling mode, ground source heat pump compressor within the refrigerant doing work on to make it to the vapor – liquid conversion cycle. Through the refrigerant / air heat exchangers in the evaporation of refrigerant carried by the indoor air circulation to the refrigerant in the heat absorption, while in the refrigeration cycle and then through the refrigerant / water heat exchanger refrigerant condensation inside, the water cycle will be carried by the refrigerant heat absorbed by the water cycle eventually transferred to the groundwater or soil. Keep the heat in the room to the ground in the process of transferring, through the refrigerant – air heat exchanger to 13 below the form of cold air cooling for the room.
Principles of Ground Source Heat Pump
2, heating principle
In the heating state, the ground source heat pump's compressor to the refrigerant acting within and through the four-way valve to change the direction of refrigerant flow.
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