This article mainly introduces: What is the water source heat pump? Water source heat pump technology applications? Water source heat pump history? In today's society, environmental pollution and the energy crisis have become the top priority for threatening the survival of mankind. How to solve this problem has become a topic for all mankind. Against this background, green buildings and corresponding air-conditioning systems, which are mainly characterized by environmental protection and energy saving, have emerged. The heat pump system is an emerging central air-conditioner that meets these requirements. The history of the heat pump can be traced back to a Swiss patent in 1912, and the real commercial significance of the heat pump is only about a dozen years old. For example, in the United States, there were 14,000 ground-source heat pumps in the country as of 1985, up from 45,000 in 1997 and 400,000 already so far, with steady growth of 10% annually. Ground-source heat pump systems in commercial buildings in the United States accounted for 19% of the total air-conditioning capacity in 1998, of which 30% were new buildings. The United States heat pump industry has set up by the United States Department of Energy, EPA, Edison Institute of Power and many ground-source heat pump manufacturers, the United States ground source heat pump Association, the Association in recent years will invest 100 million US dollars in the development, research and promotion jobs. The United States plans to achieve the goal of installing 400,000 heat pumps a year by 2001, reducing greenhouse gas emissions by 1 million tons, equivalent to reducing emissions of 500,000 vehicles or planting 1 million acres of trees, saving energy costs by up to 420 million US dollars, since then, each year to save energy costs by an additional 170 million US dollars. Different from the development of heat pumps in the United States, Central and Northern Europe such as Sweden, Switzerland, Austria and Germany use mainly shallow geothermal resources, buried underground soil coils (the ratio of buried ground source heat pumps is 96% in Switzerland and Austria Is 38%, Denmark is 27% .The ground source heat pump industry in our country has started to start in recent years, and the development momentum is optimistic.Qinghua University, Tianjin University, respectively, with the formation of industry-academia-industry consortium to develop a Chinese brand of ground source heat pump System, has built a number of demonstration projects, more and more Chinese users are familiar with the heat pump, and its application had a strong interest in China's heat pump market can be expected to have a bright future. The reason why China's heat pump market optimistic about the prospects for development Attitude, on the one hand is to save conventional energy, make full use of renewable energy at home and abroad megatrends; the other hand, our country has a good heat pump research and application of the foundation, as early as 50 years, Tianjin University Institute of Thermal Energy Lucan Ren on Launched the earliest study of heat pump in China, successfully developed the first domestic water-cooled heat pump air conditioner in 1965. The weight Construction University, Tianjin University of Business and other units buried underground coil heat pump also conducted years of research in the Chinese Academy of Sciences, Guangzhou Institute of Energy and other units also held a number of national seminars on the development and application of heat pump technology Symposium We have every reason to believe that with the full support of all levels of government, based on the full study and reference of advanced foreign technologies and operational experience, China 's scientific and technological community and the business community have joined hands to fully rely on their own strength and are fully capable of not long Of the time to open up with the Chinese characteristics of the ground source heat pump industry.As water can flow through the pump from low to high, the heat pump system is able to transfer energy from low temperature (low grade energy) to high temperature (high grade Energy) system of equipment that takes advantage of the low level of heat energy efficiently by taking energy from the natural environment at a fraction of the cost of its high-quality energy, along with the high-quality energy it takes to heat the user, Mode, high pressure and high temperature refrigerant gas from the compressor into the water / refrigerant condenser, to the water row Exothermic and cooled to a high pressure liquid, and the water temperature rises to the thermal expansion valve throttling expansion into a low pressure liquid into the evaporator and evaporated into low pressure steam, while absorbing air (water) heat. The compressor is compressed to a high-pressure gas and is circulated endlessly. In this case, the chilled water required in the refrigerating environment is obtained in the evaporator. In the heating mode, the high-pressure, high-temperature refrigerant gas is discharged from the compressor and enters the condenser to discharge heat Cooled to a high pressure liquid, to the thermal expansion valve throttling expansion into a low pressure liquid into the evaporator evaporated into low pressure steam, the evaporation process of absorbing heat in the water to cool the low pressure refrigerant vapor into the compressor and compressed into high pressure gas, so cycle The heat pump system is a new type of central air-conditioning system with high efficiency, energy-saving, energy saving, heating and cooling, flexible operation and no pollution.It makes use of the air, the surface Water, groundwater, industrial wastewater and underground soil temperature at room temperature, with the compressor system to complete the refrigeration (heating) It does not require any artificial resources, completely replaced the boiler or municipal pipelines and other traditional heating methods and central air conditioning system. It does not discharge any exhaust gas, waste water and waste residues to the outside world so that people are far away from dust, exhaust gas and mold, which is an ideal? Quot; green technology. "At present, China is to use more water source heat pump, that is, groundwater as a hot and cold" source Body "in the winter heat pump to absorb heat to the building heating, in the summer heat pump will absorb the heat to its discharge, to achieve cooling of buildings.Traditional HVAC systems require a lot of auxiliary systems or equipment to complete a complete Of the HVAC functions, such as cooling towers.And water source heat pump system only through the heat exchange with groundwater to complete the effect of cooling or heating.Using only a hardware system, through the different seasons in the condenser and evaporator conversion, it Can complete the conversion of cooling and heating functions. The following is the water source heat pump system switching between cold and hot conditions diagram: summer operation, 1,3,5,7 valve is opened, 2, 4, 6, 8 valve is closed, Refrigeration conditions; winter operation, 1,3,5,7 valve closed, 2, 4, 6, 8 valve open, heating conditions.
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