The Decision Optimization And Benefit Analysis Of Energy Saving Renovation Of Existing Buildings

The rapid development of Chinese economy brings the increasing demand forenergy. Although in China the resources are quite large, but due to the large populationradix per capita availability is below the world’s average level. Energy bottleneck is ablock of the development of China. According to research, building energy consumptionthat takes the proportion of total energy consumption is alarming. For now most of theold buildings have poor thermal insulation structure and building air tightness whichconsume high energy. So it is important to develop new technology and proposal tokeep sustainable development. In order to maximize the profits of energy-savingrenovation, it is important to evaluate the decision making method of energy savingproject. In the decision of architecture energy saving program，there are lots of factors toconsider about. How to sum up all kinds of factors in scientific ways becomes the keypoint to make right choice. The key point of existing building energy saving is toreconstruct the maintenance of structure, the roof or the facilities inside. It is hard tochoose the right methods to make the best profits. The comprehensive evaluationsystem was built to find the existing risk in the project and guide the projectdecision-makers to avoid risks, and also to evaluate the effect of the energy-savingrenovation.This paper is based on different literatures and using a combination of qualitativeand quantitative analysis. This paper introduces the building energy-saving technologyaround the world. The most suitable ways should be chose according to actual situation.With systematically summarizes new technology of energy-saving project combinedwith different climate in all regions of China, this paper also complete a suitabilityanalysis of existing energy-saving project. By using value engineering methods toestimate all factors in the proportion of the program precisely Decision makers couldcalculate value coefficient and chose the best policy to make the biggest profit. Throughvalue engineering evaluation method, decision makers can evaluate comprehensivefactors of the project. To determine the weight of each index by hierarchical model, thispaper introduced the theory of fuzzy mathematics, fuzzy comprehensive evaluationmodel as the enclosure structure energy saving evaluation tool. It shows the way that how value engineering works to estimate all factors in the proportion of the programprecisely，by getting cost coefficient and function coefficient, Decision makers couldcalculate value coefficient and chose the best policy to make the biggest profit. Byexample of a library in Chongqing, the results reflect actual problems of project andpoints out risks in energy saving project which verify the rationality and applicability ofthe model.