Building energy saving wooden windows that usher in a new development opportunities (2)

At present, a total of more than 30,000 doors and windows, and the windows and doors in the development of enterprises mostly small and scattered, low-tech, energy-saving technologies without a backward state, doors and windows with energy-saving standards and latitude European countries there is a gap, low penetration of energy-efficient windows and doors resulting in CHINA STONE VENEER consumption is three times higher than in developed countries.
It is reported that Beijing will this year by a heat transfer coefficient of windows 2.8w / (m2 · k) down to 2.0w / (m2 · k), but the country is able to produce thermal insulation coefficient of 2.0w / (m2 · k) less high-energy windows and doors very few CHINA STONE VENEER companies. "If you follow 2.8w / (m2 · k) outside the window standard to measure the heat transfer coefficient for the building's doors and windows have 99% of non-compliance." Nihai Qiong said.
"The current Beijing market to sell doors and windows broken bridge aluminum doors and windows, and from a technical perspective, the doors can meet the above criteria, but the fact is not, because the bridge aluminum doors and windows in the submission of the sample and the market of products, the heat transfer coefficient there is a gap. "Ni Haiqiong example.

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Ni Haiqiong introduction, the heat transfer coefficient in 2.8w / (m2 · k) of the bridge aluminum doors and windows, the price per square meter in the seven or eight hundred, while the heat transfer coefficient of each lower 0.1w / (m2 · k), its cost rose 100 yuan. By this calculation, the heat transfer coefficient in 2.0w / (m2 · k) around bridge aluminum doors and windows, and its price may be around $ 1500, the price is higher.
Because bridge aluminum using aluminum material reasons, the industry generally believe that the bridge aluminum doors and windows are not suitable for energy saving. It is understood that aluminum window profiles is a good conductor of heat, because the heat transfer performance of aluminum plastic 1/1250, wooden windows with aluminum windows conduction coefficient poor compared to 2200-fold. Windows in the heat transfer coefficient of 2.0w / (m2 · k) or more, the cost-effective than wooden windows, if you want to achieve the heat transfer coefficient of 2.0w / (m2 · k) less than the cost of wooden windows high cost.
Energy wooden windows welcome development opportunities
For the future development of energy-efficient windows and doors, Ni Haiqiong that saving windows and doors or wooden windows should be based. And windows, plastic window compared to wooden windows is not only environmentally friendly, beautiful, and energy-saving effect is good. If the ordinary insulating glass, heat transfer coefficient can reach 2.0w / (m2 · k)-2.2w / (m2 · k) less monolithic low-E glass, heat transfer coefficient can be reduced to 1.8w / (m2 · k) or less.
Energy saving in existing buildings, the Beijing Municipal Government in the forefront. According to the Beijing energy saving center of a staff, during the 2007-2008 New Year's Eve, the Beijing municipal government office building exterior insulation, energy-saving windows and doors, HVAC and fresh air systems, lighting and intelligent control 10 energy-saving projects carried out so that the building's energy saving become Beijing's energy-saving demonstration project,
Ni Haiqiong said that the use of two years after the relevant departments of the municipal government office building energy-saving tests show that the building's exterior insulation and energy-saving windows and doors renovation project for its contribution to the total energy savings of up to 34.13%, windows transformation is used in Beijing Philharmonic Hall Building Energy Products Co., Ltd. produces aluminum and wood windows planar suspension (double-triple-glazed windows), the heat transfer coefficient k = 1.8w / (m2 · k), the actual use of the test is 1.4 w / (m2 · k).
Because energy Muchuang low heat transfer coefficient, its construction cost is relatively high. Ni Haiqiong revealed that energy saving wooden windows of the price of 1,500 yuan / square meters, but if the average price of energy wood window to the cost of housing construction, the wooden windows of energy per square meter of construction costs increased by only 80 yuan -120 yuan, the hundreds The rate of several million per square meter, this is not a burden. Nevertheless, the market share of our energy wooden windows of only 0.3%.
An industry source pointed out that China's current annual construction windows and doors with a capacity of 500 million square meters, if 10% of building energy use wooden windows, doors and windows need dosage 50 million square meters, and our existing buildings reached a total of 11 billion square meters doors and windows, future, the existing buildings for energy saving or energy wood window industry to bring development opportunities.

by CHINA STONE VENEER