Energy saving technical measures for the hottest d

2022-08-14
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Technical measures for energy saving of doors and windows

many people don't know the technical measures for energy saving of doors and windows. Here we will explain the technical facilities of energy-saving doors and windows

(1) try to reduce the area of doors and windows

doors and windows are the weakest part of building energy loss, accounting for about 30% of the area of the outer envelope of the building, and their energy consumption accounts for about 2/3 of the total building energy consumption, including 1/3 of the heat transfer loss. Therefore, doors and windows are the focus of energy conservation of the outer envelope. Therefore, under the conditions of ensuring sunshine, daylighting, ventilation and sightseeing, the area of the opening of external doors and windows should be reduced as much as possible

(2) set sunshade facilities

set sunshade facilities, considering the location of air conditioning equipment. Reduce sunlight and directly encourage the use of suitable and multi-purpose products to radiate roofs, walls, windows and enter the room through windows. Shading measures such as verandas, balconies, cornices, sunshades, heat reflection curtains and so on can be adopted. The sun shading facilities of doors and windows can choose special glass, double-layer glass, curtain or sun visor, etc

(3) improve the air tightness of doors and windows

some data show that the number of room ventilation increases from 0. 8h-1 drops to 0. 5h-1。 Open the oil return valve to make the piston fall back, and the cold consumption of the building can be reduced by about 8%. Therefore, doors and windows with good tightness should be used in the design. Improve the air tightness of doors and windows by improving the product structure of doors and windows (such as adding sealing strips). Prevent air convection and heat transfer. Adding sealing strips is one of the important means to improve the air tightness of doors and windows

(4) try to use new thermal insulation and energy-saving doors and windows

new thermal insulation and energy-saving doors and windows (plastic steel doors and windows) made of energy-saving materials with large thermal resistance and low energy consumption can greatly improve thermal performance. At the same time, in fact, this kind of strain is very small, and special attention should be paid to the material selection of glass. The main purpose of the glass window is lighting, but since the cooling capacity of the glass window accounts for 20% - 30% of the maximum load of the refrigerator, and the heat consumption of the single-layer glass window accounts for 10% - 20% of the boiler load in winter, when the window wall ratio is controlled within the range of 30% - 50%, the window glass should try to choose characteristic glass, such as heat absorbing glass, reflective glass, heat insulation and shading film

(5) reasonably control the window to wall ratio

the window to wall ratio is the area ratio of the window opening to the wall. Increasing these two ratios is not conducive to energy-saving doors and windows in air-conditioned buildings. Try to reduce the external wall area and window area with large temperature difference on both sides of the air-conditioned room. Control the ratio of energy-saving doors and windows to walls, and put forward specific requirements for the thermal conductivity of external walls and roofs. The heat consumption through the external windows accounts for 35% - 45% of the total heat consumption of the building. Therefore, in the early architectural design, it is very important to reasonably control the window wall ratio on the premise of ensuring indoor lighting and ventilation, generally not more than 25% in the north direction; Not more than 35% in the South; The east-west direction is not more than 30%

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