Geothermal Energy (Heat): to harness green energy treasure house
World energy trends tell us that the best energy should be clean, efficient, high energy efficiency, economic efficiency and Environment Benefits. Meanwhile, world energy demand and supply so that people have to find contradictions in the various renewable New Energy . Shallow geothermal energy (heat) its huge reserves, widely distributed, green, recycled and other advantages in the worldwide concern, as countries in implementing sustainable development strategies, improve Building energy efficiency Effect of the preferred technology, but also deserved to become China's rapid economic development and urbanization accelerate the process of building energy conservation promotion of the 10 new technologies. Development of shallow geothermal energy (heat) is to solve the problem of energy shortage, balanced development and an important way to consume contradiction. Development, use of shallow geothermal energy (heat) is urgent.
5 18, by the Hebei Provincial Department of Hebei Province Department of Housing and Urban and Rural Development jointly organized the "Hebei Province to promote the use of shallow geothermal energy technology exchanges" in Shijiazhuang, the Western Hills Hotel. From the government, institutions, enterprises, media, more than 150 people attended the meeting. Experts on the shallow geothermal energy (heat) of the application status, economic evaluation, concerns, prospects, began to explore in depth and on-site visit to the Hebei Provincial Construction Service Centre office building Ground Source Heat Pump Project.
Former State Department counselor Wang Bingzhen said that this was in December 2008, "Ministry of Land Resources on vigorously promoting the development and utilization of shallow geothermal Notice" (Guo Tu Zi Fa 2008 No. 249) issued after the first meeting of the shallow geothermal energy (heat) meeting, showed strong promotion of Hebei Province in the shallow geothermal energy (heat) to the positive attitude, which for shallow geothermal energy (heat) in the country of great significance to the promotion.
Hebei Provincial Department, Construction Department, the responsible per capita, said the meeting established the Ministry of Construction Ministry of Land and Housing and Urban Research Unit leading experts in the speech, lecture, there are shallow geothermal energy use at home and abroad Analysis of macro-strategic situation and move forward deployment, as well as specific lessons learned practical demonstration projects, will actively support the development of shallow geothermal energy resources utilization for urban construction in Hebei big change for three years and new rural construction, and build a conservation and environment-friendly society to contribute!
What is Geothermal Energy? So-called shallow geothermal energy (heat) is the center of the earth in the solar radiation and heat generated by the integrated heat flow Cooperation Used, the presence in the crust near the surface layer of constant temperature within a few meters of soil, sand and water in the low-temperature geothermal energy. Shallow geothermal energy (heat) is a man from the beginning with the survival of the human Heating Heat, Yan'an cave, Beijing suburb vegetable cellar, greenhouse and the use of air-raid shelter for the indoor temperature, are shallow geothermal energy (heat) of the original application.
Shallow geothermal energy (heat) is a clean, renewable resources, their development and utilization for energy saving Reduction , Has an important role in protecting the environment. In recent years, China's use of shallow geothermal heating and cooling the building number and area increased rapidly and now has more than 60 million square meters, the service works are mainly from small-to medium to large project development project.
Features and advantages Shallow geothermal energy (heat) is the existence of a form of solar energy, geothermal renewable energy, a new member of the family. As the shallow underground collection of 60% of Earth's solar fired energy, equivalent to human consumption of close to 2 million times each year, in addition to combined effects of heat kernels, this formation with the formation of a relatively constant level, therefore:
With conventional energy, shallow geothermal energy has enormous reserves, regeneration of a wide distribution, temperature, moderate seasons, and inexhaustible features is huge "green energy treasure house";
Compared with the traditional geothermal, investment and operational risks with smaller, easy to recharge, renewable and strong, little effect on groundwater, geographical limitations and advantages, and shallow mineral resources can not belong to the state, not resources to pay the cost.
Shallow geothermal energy and heat pump
What is heat? Familiar "pump" is a potential energy can improve the mechanical equipment, such as water pumps to increase water level or increase the main pressure, and the "heat pump" is a natural from the air, water or soil to obtain low heat, acting through the power output can be used by people of high quality heat equipment, heat pump technology is closely watched around the world in recent years, new energy technologies. There are several
heat pump? Under different heat source, heat pumps can be divided into air-source heat pump, water source heat pump, geo heat pump. According to statistics, the use of water resources projects have been completed, about 58% of the heat pump system, geo-heat pump uses about 37%, air source heat pump system using only 5%.
What works? Mainly by the heat pump evaporator, condenser, compressor, expansion valve four parts. Heat pump equipment, specially set an endothermic media?? Refrigerant, it is lower than in the liquid state of minus 20 , and the temperature difference between outside temperature there is, therefore, the refrigerant absorbs heat from outside, internal evaporation in the evaporator vaporization, through the heat pump refrigerant in the compressor's work to improve the temperature, and then through the condenser so that refrigerant from the vaporization of the state into a liquefied state, in the transformation process, release a lot of heat, transfer to the reserve tank of water, so water temperature to achieve the purpose of hot water system, which is the product unique is the grounds where the market potential.
Comparison with other equipment, heat pump what advantage?
1, mature technologies (integrated), reliable performance; 2, high efficiency, low consumption, environmental protection, security; 3, a dual-use equipment, summer and winter: the winter ground water and soil taken from the heat, to heat buildings during the summer to groundwater and soil heat, cooling to the building, the annual cycle of basic maintenance of heat balance environmental systems; 4, without any pollution emissions of green systems.
Geothermal Energy's acquisition Shallow geothermal energy (heat) many extraction methods, mainly pumping pit, ground type and the single well pumping and injection type.
1, pumping Pit: This is made abroad in 1964, the use of shallow geothermal energy heating solution. Works by more than two wells drilled in the ground, remove the water from a well into the unit in which heat, then lower the temperature of groundwater entering the first two wells (injection well) recharge in the ground. Because of this approach will destroy the natural distribution of groundwater, geological, architectural and other serious effects, causing cross-contamination of groundwater and will lead to collapse and return to take well to plug wells, significantly reduce system life cycle, so 70 years from the last century After the subject
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