The position of energy-saving windows and doors in the energy-saving system
Building doors and windows for the building insulation performance of the weakest position, with the continuous improvement of people’s living standards, in order to create a comfortable living environment, indoor refrigeration or ambient way more and more prevalent, doors and windows as one of the building’s surface enclosure, a direct impact on the energy-saving performance of the building to improve the thermal insulation performance of windows and doors is to ensure that the main way of the building’s energy consumption, and now building energy saving using energy-saving doors and windows are increasingly Attention of the people.
Because of the energy-saving system doors and windows do not understand deeply, many buildings to promote the advertisement brochure can be seen above: “so-and-so property doors and windows using a certain brand of insulation broken bridge aluminium profile of energy-saving doors and windows” or “so-and-so property doors and windows using a certain brand of Low-E insulating glass energy-saving doors and windows. ” For energy-saving windows and doors, only the use of insulation broken bridge profiles or only Low-E insulating glass is energy-saving windows and doors? And what is the real energy-saving doors and windows?
A truly energy-efficient system
The so-called real energy-saving system doors and windows, not a single use of partition bridge aluminium profiles or the use of Low-E insulating glass energy-saving materials, it is a perfect combination of a system, the comprehensive results of the performance of each link, one is indispensable to measure the energy saving of the building windows and doors should be the main consideration of the three elements, that is, the convection of heat, heat conduction and radiation of heat:
Heat loss is through the gap between the windows and doors using hot and cold air circulation flow, through gas convection makes heat exchange, resulting in heat loss;
Heat conduction is used by the windows and doors of the material itself molecular movement and the transfer of heat, through the material itself one face to another face, resulting in heat loss;
Radiation is mainly a direct transfer in the form of rays, leading to energy loss.
From the above three elements, the real energy-saving doors and windows we have to pay attention to the following aspects:
Profile design and selection
First of all, choose different materials of the profile their performance is different, mainly thermal conductivity is different determines the energy consumption of doors and windows, when you choose a material, the design of the profile section and very important.
Frame, fan material above the heat insulation strip is not on the same side (by outdoor or indoor), making hardware installation, indoor and outdoor profiles through the metal hardware fittings bypassing the heat insulation strips connected to each other, thus making the heat rapid conduction, affecting the energy-saving performance of doors and windows and so on.
Choice of Glass
We know that energy loss is mainly by convection, conduction, and radiation. And the glass is mainly thermal radiation loss of energy, so we are choosing the building doors and windows glass, to ensure that the overall building energy saving, we have to choose the glass reasonably. Take the southern region, the southern region belongs to the hot summer and warm winter region, the high temperature cycle is longer, in the choice of glass can not be like the cold region to choose good light transparent glass, should choose low heat reflection, such as heat reflection coated insulating glass as well as Low-E insulating glass and so on. Respond to the needs of different buildings around the world, choose the appropriate heat transfer coefficient and shading coefficient of the glass
Choice of fittings
We once said, “Hardware accessories are the heart of doors and windows, not supporting roles.” A person’s limbs are more developed, the appearance is good-looking, if the heart does not work is not a waste of human beings? Doors and windows is the same, hardware accessories in energy-saving doors and windows inside the role played by non-trivial, not only with the doors and windows of the airtight, watertight and wind pressure is closely related to the performance of security also plays a very important role.
Correct assembly
The previous points are the requirements of several groups of components of doors and windows, a reasonable choice of components is important, and the correct combination of a variety of components into a reasonable system is the perfect energy-saving doors and windows, so the strength and experience of the doors and windows assembly plant is also very critical.
From the above analysis, we know that the real energy-saving doors and windows, just using good profiles or glass and accessories is not enough, the perfect combination of good materials, is the element of comprehensive evaluation of the system.
