The Technology And Economic Analyses Of Energy-saving Residence Building

Our country is a relatively insufficient resources and population in developing countries,with the rapid booming of the economy and the population continues to grow,construction enterprises are actively respond to a nation called for the implementation of energy conservation and emissions reduction projects to alleviate the shortage of resources in our country.Residential building is the main economic growth point of the construction industry,the demand for residential construction in our country at present has shift from necessity to comfort,energy-saving residential and ecological residential concept has also been more and more people pay close attention to.Is the biggest characteristic of energy-saving housing for residents to provide high quality and comfortable living environment,to ensure the physical and mental health of the residents and the greatest degree for households to save money on daily expenses,such as water,heating and cooling costs.Energy-saving residential living comfort,energy conservation and environmental protection,efficient,low consumption and so on outstanding characteristic,will become the inevitable development direction in the future housing construction in our country.At present commonly used technical and economic analysis method of the project,the analysis is usually not in view of the technical scheme itself,but the use different technology scheme of the overall project technical and economic analysis,with the calculated dynamic indexes,such as net present value,internal rate of return,the dynamic payback period of investment,etc.The main index to judge.Based on the analysis and comparison on technical solution,put forward a new train of thought,the trend extrapolation method and combination of whole life cycle cost theory.Trend extrapolation method is a kind of according to the economic variables time series data to show the development change rule and concluded that the future trend of quantitative analysis method.Full life-cycle cost theory emphasizes that the development of the single product and the production cost is not enough to indicate the total cost of product,decision makers should not take apart production cost and the use of maintenance cost into consideration,and should combine these two points,the whole life cycle cost considering the overall cost of the product.Energy-saving technical scheme according to the different characteristics,respectively using linear trend extrapolation method and curve trend extrapolation forecast mathematical model was build up,the energy saving technology scheme in the project will be completed and put into use after the operation and maintenance costs of the amount of calculation,using the theory of whole life cycle cost,to calculate the various energy-saving technical scheme of operation and maintenance costs and their respective original investment amount together,in the life cycle cost minimum as the final judgment standard to select the optimal energy saving technology solutions.Finally,inorder to select the optimal scheme combined with the traditional energy saving technology economy analysis method for the overall project technical and economic analysis.When the net present value greater than zero and amount in a reasonable range,the internal rate of return is greater than the company determine the benchmark yield,determining of the dynamic payback period is less than the company's investment payback period,the energy-saving technical scheme is feasible,can explain and determine the overall project has investment value.Paper used a energy-saving residential projects in changping district of Beijing as an example,the solar energy heat utilization and roof greening two energy-saving technology scheme analysis and comparison.According to two characteristics of energy saving technology solutions,respectively,using linear trend extrapolation method and curve trend extrapolation method for solar thermal utilization energy-saving solutions and roof greening energy-saving modeling calculation,operation and maintenance costs,combined with the original investment amount,the whole life cycle cost of the lowest energy saving technology solutions for the optimal energy saving technology.Calculation results show that when the project operation to 2033,the solar heat utilization and energy saving scheme the sum of the initial investment and operation and maintenance costs start below the roof greening energy saving scheme of the sum of initial investment and operation and maintenance costs.The low initial investment amount of roof greening energy saving solutions is not the optimal energy saving technology,and higher initial investment amount of solar heat utilization energy-saving solutions is the whole life the optimal energy saving technology.Finally,to select solar heat utilization and energy saving solutions for traditional technical and economic dynamic analysis,the main analysis indicators,including net present value,internal rate of return,the dynamic payback period of investment,such as calculation results show that the analysis of all indexes meet the company,the basic standard of the industry,determine the solar heat utilization and energy saving solutions for the optimal energy saving technology,project according to this plan construction have investment value.Paper on the technical scheme of residential energy conservation project comparison and economic analysis,similar to its energy-saving building economic analysis has certain reference significance.