How to enhance the airtightness of doorways and home windows and minimize constructing strength consumption

With the non-stop enchancment of people's dwelling standards, the environmental necessities for each household room are additionally getting greater and higher. It has end up a crucial circumstance for human beings to use air conditioners for cooling in summer season and heating or electric powered heaters for heating in winter. Therefore, the value of cooling and heating for about six months a 12 months is now not a small monetary rate for every family. The energy-saving impact of the airtightness of the building's exterior home windows will immediately have an effect on the financial costs of your family.



We take the indoor house of a single bed room as an instance to calculate the quantity of air infiltration. The quantity of the indoor area is about forty cubic meters (length 4500 × width 3500 × peak 2600 mm), and the place of the exterior home windows of the constructing is about two rectangular meters (width 1500 × top 1350 mm). Calculate the power consumption of one-of-a-kind grades of plastic home windows in accordance to the hermetic overall performance classification index values in the country wide preferred GB/T7101 "Classification and checking out strategies for airtightness of constructing exterior windows":



The air permeability Q 2 per unit place of a plastic window with grade 1 hermetic overall performance is 18 cubic meters/(m 2 ·h), and the air permeability of a 2-square-meter window in one hour is 36 cubic meters, which essentially can make the indoor air in one hour. Replace all once.



The air permeability Q two per unit vicinity of a plastic window with grade four air tightness is 4.5 cubic meters/(m two ·h), and the air permeability of a 2 rectangular window per hour is 9 cubic meters. It takes 4 hours to make the indoor air Replace all once.



Level 5 air tightness overall performance per cubic hour per hour Q two ≤ 1.5, whilst stage four permeability Q two ≤ 4.5, stage four is twice as tons as stage 5.



At the identical time, we did an analogy check of 1# and 2# plastic home windows of distinctive grades: a 1300W air conditioner for cooling and heating used to be used in a room with a house extent of 48m3 (4m×4m×3m), and a 1# sliding window (specification 1500×1500 , the air tightness overall performance is grade 1, the measured penetration is 16, and the thermal insulation overall performance K fee is 3.6) and 2# energy-saving sliding home windows (same specifications, air tightness grade 5, the measured penetration quantity is 1.2, and the thermal insulation overall performance K fee is 2.7) respectively. test. In an surroundings with an indoor temperature of 32°C, when the indoor air conditioner is set to 20°C (normally getting into and leaving the workplace wall barring thermal insulation), it runs for eight hours, and the electricity consumption of 1# window hermetic overall performance degree 1 for eight hours is 10.73 degrees. The 8-hour electricity consumption of the 2# window with hermetic overall performance stage 5 is solely 6.1 degrees. It can be viewed that the greater the hermetic performance, the decrease the energy consumption, on the contrary, the worse the hermetic performance, the greater the electricity consumption. Relevant energy-saving specialists emphasised three years in the past that the strength consumption of constructing doorways and home windows money owed for 50% of constructing electricity consumption, and the creator believes that 50% of the electricity consumption of doorways and home windows lies in hermetic performance. It can be viewed that the actual key section of electricity saving of doorways and home windows lies in air tightness. The enchancment of air tightness additionally improves the sound insulation performance, which radically improves the water tightness, safety, anti-fouling and dustproof.

From the above statistics analysis, it can be viewed that the air-tightness overall performance of plastic home windows of grade 1 and grade four has accelerated by means of four times. That is to say, the strength consumption of air-conditioning gear differs via at least two instances (minus the warmness switch coefficient of the wall). Calculated with a small air-conditioning gear of 1000W, if the essential physique spends a few greater hours in a day, it will waste a few yuan. The bed room will waste 200-300 yuan inside a year, and the temperature distinction between indoor and outside in wintry weather in the bloodless northern areas is commonly above 30 ℃ (commonly acknowledged as: the gap with a huge needle, the wind with a huge bucket), and the power consumption is even greater serious. From the point of view of the charge difference, the rate of regular single-glass civil home windows is a hundred and fifty to a hundred and eighty yuan per rectangular meter, the charge of medium clean glass engineering home windows is between 220 and 240 yuan per rectangular meter, and the fee of patented energy-saving home windows is 360 yuan/m two , Each rectangular consumer wants to spend greater than a hundred yuan, however exceptional energy-saving home windows are hardly ever maintained for 30 years, whilst inferior home windows price at least 200 to 300 yuan in renovation charges for decades. The preference of low priced and energy-saving plastic home windows is in simple terms due to small losses.



In the fact that the energy-saving impact of sliding doorways and home windows is usually challenging to improve, Huaian Xingfu Doors and Windows Co., Ltd., a high-tech product producer in Jiangsu Province, has centered on unbiased lookup and development of "health brand" doorways and home windows and received 4 country wide utility mannequin patents: "High-strength energy-saving plastic Profile sliding window sash", "energy-saving plastic sliding window", so that the patented science energy-saving product used in the standard issue profile of the "health brand" sliding window is tightly assembled, and its wind strain resistance, air tightness, water tightness and sound insulation overall performance are all in the Grade four or above, and the thermal insulation overall performance is above Grade 7. This product meets the technical necessities of constructing electricity saving of 65%. Tests exhibit that: in a room the use of this door and window, every air conditioner can retailer two kWh of electrical energy per day. Calculated in accordance to the countrywide common of one hundred eighty days of cooling or heating and two devices per household, the annual electrical energy saving per family is 720 kWh × 0.6 yuan/kWh, which can be The electrical energy fee is saved by using 432 yuan, the fantastic existence of the energy-saving home windows is about 30 years, and the electrical energy value per family can be saved by means of extra than 12,960 yuan in 30 years.