Second, the water source heat pump central air conditioning technology developments at home and abroad
Water source heat pump technology (hereinafter referred to as GWHP) The proposal began in Britain and the United States, the United States 30 years from the 20th century began to apply. Oregon in 1948, an engineer Krocker created a water source heat pump applications in commercial buildings. 50 years of the 20th century occurred in Europe for the first time using GWHP climax. At that time, lower energy prices, lack of economic competitiveness of such systems, but have not been promoted. With the last decade, especially in the last five years, energy price increases, GWHP in North America such as USA, Canada and the Nordic such as Switzerland, Sweden and other countries have made rapid development, according to 1999 statistics, the household heating device, GSHPs proportion of 96% in Switzerland, Austria, 38%,27% in Denmark. China Back in the '50s, once in Shanghai, Tianjin and other places try to take winter irrigation way summer of extraction of groundwater cooling, Tianjin University, Institute Professor Lv Canren energy has carried out the earliest studies of heat 1965, successfully developed China's first water-cooled heat pump air conditioners. At present, Tsinghua University, Tianjin University, Chongqing University, Tianjin, Shandong Institute of Technology built, the CAS Guangzhou Institute of Energy and many other universities and research institutions in the study of water source heat pump. Tsinghua University, which after years of working conditions in amulti-source heat pump industry has formed the research results of several demonstration projects have been completed. Can be expected that the technology will be most effective in the 21st century heating and cooling air conditioning technology.
Third, the water source heat pump technology in the region to promote the superiority of Shenyang
Hydrogeological conditions are suitable Water is a prerequisite for application of water source heat pump, water system, water, water temperature, water quality and water source heat pump system stability is a run effects of important factors. Shenyang is located in the city on the Hun River Alluvial Plain aquifer is mainly coarse sand, gravel and pebbles, abundant groundwater resources, with the protection of groundwater resources in recent years intensified, with factories migrate to the suburbs, Shenyang underground funnel area has been basically eliminated. Now, the groundwater level between the 50-60m, depth 5-13m. Summer and winter water temperature maintained at a constant 12 ℃, PH value of between 6.5-8.5, groundwater quality, water resources assessment in the country was excellent. Shenyang City this unique hydrological and geological conditions is unique in the country to meet the water source heat pump system is running on the water, "adequate water, moderate temperature, the water is suitable, stable water supply" requirements, water source heat pump system for large-scale promotion in Shenyang . 2, the water source heat pump technology in the construction field advantage in the application As a new water source heat pump heating and cooling technology, more and more attention at home and abroad, and its advantages in the construction field in the following areas: ① lower energy consumption. The biggest advantage of ground source heat pump heating and cooling with conventional air conditioning systems consume less power compared. Under the proper conditions of air heat pump system than the 40% energy savings compared to electric heating energy saving over 70%. ② to improve the building appearance. Since there is no outdoor compressors or cooling towers, so the possibility of damage greatly reduced the appearance of the building or eliminated. ③ low environmental impact. Comparison of CO2 emissions from coal-fired boilers and electric drive with the same fuel amount of CO2 emissions can be reduced by 30% -50%, in environmental protection will play a significant role.④ area are few. Compared with coal-fired boiler house, the area can be reduced by half or more, If heat pump into the ground, the floor space is not occupied. Fourth, water source heat pump technology applications in the Shenyang region and the problems Water source heat pump technology is introduced in 1998 in Shenyang, the relatively early with Tokyo Electric Power dormitory, Shenyang Institute of Automation, Liaoning Science and Technology Building, Medical School sophomore, etc., heating and cooling large area of 100,000 m2 or more, only a small 2000m2. Typical is the Shenyang Institute of Automation of the construction area by 4.6 million m2, 1999 the introduction of water source heat pump central air conditioning system to replace the existing two coal-fired boilers. 2002, 152 days in winter heating, summer cooling 100 days. Annual operating cost of 21.33 yuan / m2. Heating and cooling cost savings throughout the year 7 million. Shenyang City in recent years by examining the construction and operation of water source heat pumps as far as the introduction of the heat pump units are relatively molding technology, in terms of operating efficiency and maintenance requirements are able to reach. But as a heat pump system is a key component of the well group, the recharge process and as well there are still many problems, mainly in the following areas: First, in the design of pumping and injection wells spaced ground source heat pump is usually the manufacturer with reference to the experience of value, ignoring the different geomorphological units hydrogeological factors, design of well spacing is too large, for high-density residential district or city commercial construction applications deep recharge water source heat pump system, because the availability of building land area restrictions, well group can not be arranged, seriously affecting the water source heat pump system in promoting the use of Shenyang. Such as medical sophomore distance between water source heat pump wells is too large, the number of recharge well below standard, unit operation, the water recharge does not continue. Shenyang Institute of Automation is also due to recharging wells can not be cloth to open, causing part of the construction can not use water source heat pump heating. There are some users to solve problems recharge directly to water into the sewer pipe, did not return poured into the ground, wasted a lot of groundwater resources. Second, as well backward technology, poor quality as well, not only affect the life of wells, and recharge water also affects the results, and ultimately affect the water source heat pump to work and heating or cooling effect. Shenyang is now well into the process has continued the practice of many years ago, injection well package by wrapping steel skeleton net-filter tube. The filter tubes in use for some time, as seriously corroded wire wrapped around wire, tube well is blocked, resulting in the recharge coefficient of recharge wells, life has declined, limiting heat pump technologies. Fifth, I solve the water source heat pump into the well recharge and process issues of 1, pumping, irrigation group spacing of wells As compared to the ground water recharge difficult, therefore, play a viable solution for the three wells, one water, two recharge, pumping wells and recharge wells that the number of 1:2. In the recharge, in order to avoid the injection well to the pumping well "hot linking" effect, maintaining a constant temperature of pumping wells, three wells to ensure an adequate distance between, usually more than 100m. If the arrangement of three wells are shown for the side length of equilateral triangles 100m, pumping, irrigation capacity of 100m3 / h, according to pump Unit operation, the heating (cooling water required is less) 10000m2 water demand 100m3 / h terms, the land area in this field source heat pump heating and cooling of the construction area of 10000m2. According to my company in Shenyang hydrogeological conditions, refer to the relevant research results at home and abroad, through the engineering practice, that pumping be reduced to 60m spacing of injection wells is feasible, such as the national government fattened pump pumping irrigation wells spacing 50m, operation well, irrigation well pumping does not appear "hot linking" phenomenon. International Garden pumping to the king, the minimum spacing of injection wells group 60m. This is also in the side length of 100m within a equilateral triangle, you can get laid two wells, recharge wells, 4 eyes, able to 20000m2 building area of heating, cooling. That is, in the same venue, the maximum increase in the number of laid well to address the causes due to space constraints the problem can not be applied heat pump system. At the same time, because the pumping, irrigation reduced well spacing, increasing the amount of single well recharge. 2, as well new material and new technology research and development According to my company in Shenyang hydrogeological conditions, developed a package of plastic plates reinforced skeleton wrapping package net-filter tube into a well of new technology, the advantages of this type of filter tubes are corrosion-resistant, can extend the service life of tube wells, light weight, its specifications and performance can meet the coarse and fine particles into the aquifer by wells. Filter pipe and rigid plastic than the biggest advantage is the high strength, able to withstand the powerful over the water when the recharge impact. Through experiments and projects in recent years proved that this technology can greatly improve the life of wells, water source heat pump has also been recognized by the user, and Wang International Garden, East Park are designated Xin great wisdom to use our technology. Advantage of this opportunity, we will further study this filter tube thermal conductivity and infiltration capacity, and patent applications, and promote this technology to promote the use in Shenyang. Sixth, water source heat pump technology application in Shenyang 1, water source heat pump technology in the promotion of the significance of Shenyang ① energy saving, low operating costs Is the water source heat pump and heating water as a heat source heating and cooling media technology. At run time, the groundwater source heat pump heat through the heat exchange unit and then discharged after going into the underground aquifer, recharge energy storage to groundwater as a heat source, summer and winter irrigation use, irrigation in summer and winter use. In this process consumes very little power. The cooling, heating coefficient can reach 3.5 to 4.4, with the traditional air-source heat pump, compared to about 40% higher than their central air-conditioning running costs as an ordinary 50 to 60%. Water source heat pumps and boilers (electricity, fuel) and air source heat pump heating system has obvious advantages compared. Heating boiler can only be 90% ~ 98% to 90% power or 70 within the fuel can be converted into heat, for users, so water source heat pump than the electric boiler heating energy savings of more than two-thirds more than the fuel boiler Save more than half the energy; ② Environmental In the traditional Chinese concept of air-conditioning systems, due to the country's economic development and policies for a long period of time, the northern coal-fired boilers generally solve the problem of heating in winter. Water source heat pump is running, just recharge through the extraction of groundwater extraction and energy, irrigation pumping in the whole process, the pipeline is closed, and will not cause pollution of groundwater. Comparison of CO2 emissions from coal-fired boilers and electric drive with the same fuel amount of CO2 emissions can be reduced by 30% -50%, in environmental protection will play a significant role. 2, the promotion prospects of water source heat pump technology ① stresses energy saving, is the heating of structural adjustment in Shenyang City, and gradually replace coal-fired boiler room in fact practical way. As for the new environmentally sustainable development and public awareness, the world and the structure of all energy use in China is changing, from the original coal, oil, heating the transition to clean energy such as natural gas and electricity. Shenyang is more for the serious air pollution as one of the cities, its air pollution control policy to include the adjustment of energy structure, mainly from coal to natural gas and electricity alternative energy sources. However, although alternative energy sources can be a partial solution to the problem of air pollution, but natural gas and oil and so on are non-renewable energy sources, from the perspective of sustainable development, we must improve energy efficiency or renewable energy looking for, and water source heat pump unit is Ideally, a device. ② irrigation through the back re-use, residential and environmental water issues to resolve. With economic development, people's living standards improve, people yearn for a living environment surrounded by water. However, the current situation of China's water resources point of view, the simple extraction of groundwater to meet this requirement is not desirable. The water source heat pump can be taken to create a hydrological landscape before recharge, through processing technology to achieve the standard of irrigation and then poured into the ground back to a good solution to this problem. By current technology, this is feasible. Water source heat pump technology to promote sustainable development needs of government from the perspective of integrated energy and resources in all aspects of environmental considerations, water source heat pump water used to adjust the policy, the new water sources to determine how to manage in order to promote its large-scale development. We will use the company's technology, in close cooperation with relevant government departments for the relevant administrative departments in the development of industry standards to provide technical advice. To promote the city's economic and social development to contribute their efforts. 水源热泵中央空调英文文献和翻译(2):http://www.751com.cn/fanyi/lunwen_1178.html