課題的第二部分是基礎(chǔ)研究。這是一個非常耗時的工作，需要大量的測試數(shù)據(jù)支撐。在門窗方面，我們需在不同的窗墻比下進(jìn)行不同的研發(fā)，包括上下游產(chǎn)業(yè)、原材料的供給，涉及到幾百家企業(yè)，而且每一類產(chǎn)品的覆蓋面不一樣。尤其是針對北京地區(qū)，包括玻璃配置的要求，什么玻璃更適合北京？什么型材更適合北京？需不需要外遮陽等，我們對這一系列問題進(jìn)行了系統(tǒng)的總結(jié)。
The second part of the project is fundamental research. This is an extremely time-consuming job that requires support from large quantity of test data. With regard to doors and windows, we need to do R&D work including upstream and downstream industries and supply of raw materials with different window-to-wall ratios. Hundreds of enterprises are involved, and the coverage of each category of products also varies. Particularly for the Beijing area, what kind of glass suits Beijing best in view of the glass configuration requirements? What kind of profiles is more suitable for Beijing? Are external shading facilities necessary? So on and so forth. We have made systematic summaries about this series of problems.
第三部分是系統(tǒng)介紹。我們的圖集收納了鋁、塑、鋁木復(fù)合這三類窗，每類中挑選出6種窗，分別從K值=1.5到2.0逐一進(jìn)行介紹。
The third part is the systematic introduction. Our portfolios collect and introduce three categories of windows (aluminum, plastic and aluminum-wood composite). 6 types of windows are selected for each category with the K value varies from 1.5 to 2.0.
75%建筑節(jié)能政策下的門窗發(fā)展趨勢
Development trend of doors and windows against the 75% building energy conservation policy
北京市在75%建筑節(jié)能標(biāo)準(zhǔn)方面對門窗的要求是K值在1.5到2.0 這個范圍之間，具體數(shù)值根據(jù)建筑的不同使用要求而有不同變化?，F(xiàn)在實現(xiàn)這一標(biāo)準(zhǔn)還是有一些困難的，在這里要分為兩個部分，一個是技術(shù)方面，另一個是管理方面。
According to the 75% building energy conservation standard, the requirement of Beijing for doors and windows is that K =1.5 to 2.0, depending on different utilization requirements of buildings. There are still some difficulties in realizing this standard at present. The difficulties are divided into two aspects here: technical and management.
首先，在技術(shù)方面，例如對鋁窗來說，隨著K值的降低，它的成本將大幅上升，塑窗K值達(dá)到1.5就相對容易很多，而鋁木復(fù)合窗是介于這兩者之間的。我們肯定要根據(jù)不同的窗型考慮如何達(dá)到最優(yōu)性價比，降低K值。
Firstly, from the technical aspect, with decrease of the K value, the cost of aluminum windows will go up dramatically while it is easier for plastic windows to have the K value reduced to 1.5, and the difficulty degree for aluminum-wood composite windows falls in between. We certainly have to consider how to reach the optimal cost performance and lower the K value based on different kinds of windows.
其次，也是最重要的是在管理方面的困難。我們在課題中也對管理層提出了建議，隨著標(biāo)準(zhǔn)的提升，工程造價的定額也一定要跟著提升，不然就會陷入惡性循環(huán)，技術(shù)方面的指標(biāo)就是白定。廠家只會拿著不達(dá)標(biāo)的產(chǎn)品濫竽充數(shù)，因為他們是不可能做虧本生意的，600元的定額想買到成本800元的東西，那是不可能的。
Secondly, the most important difficulty lies in management. We have proposed suggestions to the management. For instance, the quota of project costs should increase with the promotion of standards; otherwise, the enterprises will be trapped in a vicious cycle and the technical indicators will be set for nothing. In that case, the manufacturers will only make up a number with substandard products, because they will never make bad bargains and it is impossible to buy materials worth 800 yuan with the quota of 600 yuan.