Research on cost-system and algorithm of residential construction products based on emergy analysis

Construction activities involve many factors such as environment, economy and society. Residential buildings should not only meet living function, but also solve the environmental and social problems that they bring about. However, the present price of residential product has no measurable method on ecological impacts to apply and still stays in using traditional monetization method and cost valuation theory. The fact, that the benefits of applying new technology for building energy are not materialized in price, has affected the investment on energy conservation building by developers and owners. So, present price system of residential buildings cannot meet the needs of the society. A new price system, which is based on Environmental economics and ecology, representing energy cost of a building product in its life circle in a scientific and straightforward method, is badly needed. This dissertation, from a new perspective, researches the issues of environmental costs of residential construction products based on the in-depth analysis of the present price system of residential buildings and the ecological impacts of construction in our country, and also analyzes a project in Xiamen as all calculation case by using emergy analysis method on the basis of the theory and method research, with the aim of setting up reasonable costs for ecological impacts of construction and promoting complete change in appraisal of residential construction, which could provide better service to the strategy of sustainable development.