Insulation materials, ground source heat pump system - a new building energy efficiency facilities

With the increasing public awareness of environmental protection, many capital construction developers have used a variety of advanced residential facilities with energy-saving and environmental protection functions in house construction in order to achieve the goal of green building and reducing the emission of carbon dioxide. It is reported that the more advanced buildings in Beijing are fresh air system, low-e glass, ground source heat pump system and so on. So these advanced facilities have what energy saving features? Can ordinary people at home also learn and adopt it?

Replacement of fresh air system allows the room always have fresh air At present, many energy-saving buildings in Beijing, have adopted a replacement fresh air system, the role of this system is to allow housing in the case of not open the window can also maintain indoor air With the exchange of fresh air outside, do not open the case of air conditioning can maintain a comfortable temperature.

According to Feng Shang International Real Estate Development Company, Zhang Zedong, introduced the replacement of fresh air system is the use of the next air supply on the return air way through a set of air heat exchange device, the outlet temperature control is always below the room temperature 2 ℃ To 3 ℃, the return air outlet through the negative pressure function of the system to indoor turbid air discharge. This room creates a fresh, airy, bottom-up body that comforts the human body.

According to Sun Ke Fang, deputy chief engineer of the Center for Housing Industrialization of the Ministry of Construction, tenants of ordinary traditional residential quarters can also install fresh air systems themselves, but two problems must be considered. First, it is necessary to consider whether there is ceiling suspended space for the location of the air duct, because the air duct should be arranged in a large area at the top of the building, and the pipe will occupy a certain height, thus reducing the height of the floor. Generally consider the 20-30 Cm height. Second, we must also consider whether there is a residential air-channel mouth.

In addition, many consumers may be more concerned about the price of self-installed fresh air system. According to reporter learned in the market, a 100 square meters of residential installation of a fresh air system needs about 10,000 yuan.

Low-E coated glass prevents thermal radiation from entering and leaving the house

Low-e glass, also known as low-e coated glass, because of its coating film has a very low surface emissivity named. So what are the benefits of both low emissivity and coating in our home?

Winter, low-e glass of indoor heating and indoor objects emitting heat radiation, like a heat mirror, the vast majority of heat will be reflected back to the room, to ensure that indoor heat is not lost to the outside, thus saving heating costs. In summer, it can prevent the outdoor ground, heat radiation emitted by the building into the room, to achieve the purpose of saving air conditioning and refrigeration costs.

In addition, another benefit of reducing indoor heat loss during the winter is environmental protection. Building heating caused by emissions of harmful gases such as carbon dioxide is an important source of pollution. If Low-e glass is used, the emission of harmful gases can be reduced significantly due to the reduction of heat loss due to the fuel consumed by heating.

According to Sun Ke Fang introduction, if your home is a traditional building, you want to transform the original ordinary glass there are two ways. First, users can choose energy-saving window film. At present, the energy-saving and safety glass film sold on the market can be affixed to the ordinary glass surface from the interior of the house to achieve the features of thermal insulation, energy saving, explosion-proof and ultraviolet protection by changing the physical properties of common glass. The cost is generally 100-300 yuan / square meters.

Second, the user can replace all ordinary glass low-e glass.

However, this method is more time-consuming, larger quantities, and the relative foil method costs are relatively expensive, 700-1000 yuan / square meter.
Ground-source heat pump system without exhaust emissions can make the house warm in winter and cool in summer

Beijing University of Technology Heat Transfer Enhancement and Key Laboratory of Energy Conservation Professor Wu Yuting told reporters that ground-source heat pump works and air-conditioning works are the same, a heat pump organization consists of three components, namely, compressor, condenser and evaporation Device. Professor Wu Yuting briefly introduced the working principle of the heat pump organization in the summer: "The summer room to be refrigerated, the evaporator absorbs the heat of the room, then, the liquid in the condenser turns into gas, and the evaporation process of the gas is the process of absorbing heat After that, the compressor will compress the gas, the process of compression is also the process of temperature increase. Finally, the unit discharges the heated gas into the soil with a height of 100 meters to achieve the room cooling effect.

The system is generally understood that the heating and cooling is the use of water and soil for hot and cold exchange of heat in winter to "take out" the supply of indoor heating; the summer heat to "take out" into the underground soil to reach Cooling effect. However, whether it is to "take out" the underground heat or "send" the indoor heat, it is necessary to go through special installations that go deeper into the ground more than 100 meters or even hundreds of meters.

Sun Ke Fang told reporters that the current ordinary residential can not complete this transformation, if you need to transform developers need to start work, study the terrain, the depth of buried devices to test a series of projects. "Although the project is large, but the ground-source heat pump system without emissions of carbon dioxide and other gas, without the cost of natural gas, coal resources, energy saving and environmental protection from this perspective, we recommend developers to transform for the benefit of future generations."

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