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Application of heat pump technology, Beijing Zhongguancun underground energy pumping cold wind
Friends of civil air defense projects or underground cave stay, will be lamented where the warm winter and cool. The shares buried underground 5 meters underground in Beijing, perennial to maintain the temperature at about 15 ℃ underground "energy" is often overlooked. Now, Dr. Xu Yunsheng, a Chinese scientist who is the associate dean of the Faculty of Environment and Energy Technology at the University of Missouri-Columbia, has brought to China the technology of extracting underground energy to provide heating and cooling air for buildings on the ground. Dr. Xu Yunsheng revealed that Beijing's first geothermal energy utilization teacher project "Zhongguancun Software Park" was put into heating in winter of 2004, and the same set of equipment only needs to change the valve, and from June 2005, geothermal heat will be used to send software to the park Went to the cold. "Cold Storage" and "Thermal Storage" are at their feet "in the four seasons of Beijing where the annual average temperature is about 16 ℃, while the temperature difference between winter and summer is as high as over 40 degrees." Dr. Xu Yunsheng told reporters that people who experience the heat and cold on the ground may be hard to think that at our foot about 5 meters, has a constant temperature layer, the temperature layer of 15 ℃ -18 ℃ heat to form a huge cold storage And heat reservoir, if you can use this heat to make use of, as to provide us with the energy of comfortable living temperature, the current building will be able to say goodbye to "air conditioning heating era." The principle of the pump made of "heat pump" "We all know that the water flow to the low flow of truth, the temperature of conduction and water, is from high to low flow.A cup of hot water, a cup of cold water together, hot water The temperature will flow to the cold water, and eventually into two cups of warm water. "Dr Xu told reporters," But to get the water from the lower reaches to the height, you must have a pump to help. Heat is the case, in winter, Underground temperature of about 15 ℃ to extract only the ground temperature below zero, you need a heat pump device. "Dr Xu explained that the heat pump is the ground can be used for a constant temperature throughout the year in exchange for air-conditioning and heating devices. 75% of the required energy comes from the ground Dr. Xu introduced, unlike conventional air conditioning and heating systems, ground source heat pumps no longer need to "create" heat or cold indoors. Instead, it "diverts" energy between the earth and the interior, using minimal power to maintain the interior at the temperature you need. In winter, a small amount of electricity is sent indoors by several times the amount of energy in the soil or rocks. At this moment, it is very easy for 1 kilowatt of electricity to provide you 4 kilowatts to 5 kilowatts of heat. In the summer, on the other hand, the vast amount of heat in the interior is easily transferred to the soil and the cool air indoors, while the underground energy is used during winter. Investment in ordinary residential 3 years back to "If a private villa installation of the system takes about 10 million, seemingly costly, but it can be 3 years to return the cost." Dr. Xu calculations to reporters, To a villa to install the traditional air-conditioning about 60,000 yuan or so, but every summer to open the air-conditioning led to a huge amount of electricity is not, the winter heating costs of public heating on the need for a few thousand dollars each year in the energy into the ten thousand yuan not Next words. And 3 years, the cost of accumulation and installation of ground source heat pump price will be about the same. "Using this heat pump technology, which has a life span of about 50 years, is not only environmentally friendly, it saves a lot of money in a few years."