Weak current College】 【analysis of ground source heat and hot water heating system combines the features of.

<br> Because of the heat pump (heat pump, water source heat pumps) for the low-water temperature, which makes it as low-temperature hot water floor heating (hereinafter referred to as the "hot-water floor heating") system .of a heat source. Because of the heat pump in Shijiazhuang application range is becoming more and more widely, it is a heat pump combination with hot-water heating for residents. This article in Shijiazhuang city, district heating system applications, for example, analysis .of ground source heat and hot water heating system based on the combination of features. <br> <br> An introduction to the Garden State <br> <br> Ann residential district is a project of Hebei Commission approval of a large affordable housing projects ., from Shijiazhuang municipal affordable housing development center. Community planning 36 hectares, with a total construction area 33.43 million square meters, can provide boutique residence in the community more than 3000. Community development will enhance the city's image, to speed up the process of urbanization .in the Southeast Division, urban economic prosperity have immeasurable impact. The project is divided into two phases of construction, the first phase of the project already in December 2007 have been delivered to the owner's key. <br> <br> Ann residential district is .located in Shijiazhuang city development main direction - Southeast direction, press the city master plan, the community in the city center. Since no municipal heat supply facilities, combined with the heat pump has several advantages, so the community planning will heat pumps as a heat .source, part of building a water source heat pump, part of the building using ground source heat pump, indoor heating system in the form of low-temperature floor heating. <br> <br> Ground source heat pump technology was born in the mid .-1980s. The technology intelligently leverage storage in the heat of the Earth surface, extracting heat from the ground in winter, the summer heat in the building and placed underground for winter and summer heating and cooling needs energy. Compared with other sources of energy, .this energy is obviously very energy efficient - to produce 100% usable thermal energy, General heating boiler needs a 110% to 120% of primary energy (fuel or gas), and this resource is not renewable, burning after causing environmental pollution. But the .opposite of ground source heat pump system, producing the same amount of heat energy, it only requires a power of 1 / 4, other 3 / 4 of the energy from the nature of the renewable energy in free. Ground source heat pump consists of a .ground-coupled heat exchanger, the switch either horizontally installed in a pit, or to the u-tube vertically mounted in the shaft. Different pipe Groove or shaft of a heat exchanger into parallel connection, and then through a different set pipe enters the building .and building water loop. In the liquid temperature is low, the system needed to join the antifreeze, northern areas of application should pay special attention. <br> <br> On-site survey <br> <br> In the decision to use .ground-source heat pump, related departments on situations in the field have accurate and detailed resources. Although some areas may be ground source heat pump installed because some special situation increases the equipment or installation costs, but most of the region is suitable for installation. .According to engineering practice, the adaptability to any place of the assessment should take full account of the situation of the local geology, including loose soil in the natural state and load the density, soil and water-bearing layers of the situation after the load, .the rock layers of rock bed structure. <br> <br> According to the geological reports, relevant aspects for ground source heat pump system. The beginning of the work on the identification of local conditions, to ensure that the design period to avoid experiencing .potentially complex issues, and design departments also need such information in order to select the most suitable drilling and mining equipment, and you can save a lot of time and money. <br> <br> Programme selection <br> <br> In the .field on the basis of the findings of the investigation to determine the heat exchanger is the layout: layout with a vertical shaft or horizontal layout. <br> <br> On the surface area of the site available is one of the factors must be considered .. <br> In layout, the vertical spacing of 4.6 meters above sea level, this is to ensure that in most cases the shaft between the thermal noise and (or) is the accumulation of heat is negligible, and you can guarantee that after that .determine the various parameters of the shaft to meet design requirements. <br> <br> Although the double u-tube/shaft structure of heat than single u-tube/shaft structure per ton of heat exchanger requires additional pipeline, but assessment showed that .for less drill shaft and savings can compensate for the increase in the number of pipeline and increased costs. <br> <br> Parallel pipe vertical heat exchanger and in-line pipe vertical heat exchanger, u-tube wells can be smaller, which can .reduce costs, cost pipeline antifreeze. Due to the smaller pipe making easier, labour costs may also be reduced. And U-shaped tube diameter of the shaft diameter is reduced correspondingly smaller, drilling costs can be reduced correspondingly. Parallel pipe heat exchanger same loop .sets all of the connected shafts of heat radiation is the same, and in-line heat exchanger each shaft of heat is different. <br> <br> Vertical soil heat exchanger depending on the load of the building. Building load is building type, .size, position, internal load (that is, the device uses heat, lighting, heating), outdoor air permeability, solar radiation heat gain and maintain structures and ventilation function. Other soil heat exchanger volume along with the average temperature and overburden (soil) .and rock, underground floors have heat transfer coefficient, the efficiency of heat pump and heat exchanger tube size. <br> <br> Ground source heat pumps and water heating to warm the advantages of combining <br> <br> Ground source heat pump .system with very little outdoor equipment and rooms can be arranged in the basement, saving costly maintenance and security costs. There is no roof, no roof-bearing, modification or obscurations, greatly reducing the external noise and architectural beauty has been very well maintained. .<br> <br> Residential community using ground source heat pump is an important reason - will give developers bring great benefits. The benefits of using ground source heat pumps, for those who do not have municipal heat supply of the community particularly obvious. And .municipal heat supply of the community can also use ground-source heat pump. This is because municipal heat supply interface charges quite expensive: residential General 40 Yuan / square meter, andThe Government has a file, prohibiting the developer from the owners receive heating set tariff .. On the other hand, the ground-source heat pump running cost is low, but the Government has not yet promulgated file specific provisions to the heat pump to heat source of community residents in winter heating costs charged value. Currently the owners pay for the .class fee and municipal heating heating heating period the same, ie (4 months) 18.4 Yuan / square meters. In this way, you can get some property companies. In the garden, indoor heating is used in low-temperature floor heating. Because of .the heat pump of water temperature is 50 ° c ~ 60 ° c and meets the radiant floor heating system is not higher than 60 ° c, without increasing the heat transfer equipment, significantly reducing investment, this is also combined the two greatest advantage. < .br> <br>.