Research On The Application Of Rural Building Energy-saving Redevelopment And Clean Energy Heating

Winter heating in rural buildings is always one of the main reasons of environmental pollution in North China.Rural buildings are short of energy-saving consciousness in the aspects of construction form,enclosure structure thermal insulation and heating method.In an attempt to elevate thermal insulation performance of enclosure structure of the existing residential building and lower emissions of pollutants from winter heating,this article conducts a study in terms of redevelopment scheme of enclosure structure for the existing residential building in countryside and feasible way of cleaning heating in winter.This article takes the rural areas of Central Hebei Province as an example.Through cyber questionnaire,field visit and literature study,it summarizes the present situation of rural building in Central Hebei Province adopting survey method and literature research method.Through research,the article finds that there is a larger space for energy-saving redevelopment in rural areas.The article chooses a rural building located in Shijiazhuang and applies DeST software to analyze its energy consumption.The article puts forward four different redevelopment schemes separately with each energy-saving rate is 86%,84%,49% and 64%,whose initial investment is 40 292 yuan,30 767 yuan,34 208 yuan and 8 140 yuan,with the investment payback period separately is 5.3 years,4.1 years,6.5 years and 1.3 years.The article optimizes and researches the additional sunspace,proposing its optimization scheme,opening vents with different shapes,areas and numbers,setting up manual opening and closing valves in vents,determining the opening and closing time in accordance with the temperature in sunspace.The article designs 12 round models of vents and 12 square ones according to the shapes,areas and numbers of vents.It simulates with Fluent software,after 2-hour motion of every model,among the round vent models,the radius of vent is 0.15 m,when it appears three air inlets and two air outlets,the indoor temperature hits highest.Among square vents models,the side length of vents is 0.3m,when it appears three air inlets and two air outlets,the indoor temperature hit the highest.Through researching and summarizing the problems in rural buildings of Central Hebei Province,the article designs four redevelopment schemes,three of which possesses implementation value.By redeveloping sunspace,the best scheme is determined.It is hoped that it will play an instructional role in the energy-saving redevelopment and cleaning heating of rural building in Hebei Province and provide redevelopment thoughts on rural residential in other cold areas.