Research On The Key Technology Of Energy Saving Of Rural Residential Buildings Based On Outdoor Microclimate Regulation

It is of great significance to study the regulating effect of green landscape on outdoor microclimate for improving the quality of residential environment and promoting the development of building energy conservation.The quantitative analysis and evaluation of microclimate adjustment measures on building energy consumption is the key to the research.In this paper,the influence of different green landscape elements on outdoor microclimate and energy consumption of single buildings in residential areas has been studied by comprehensive use of theoretical analysis,field measurement,numerical simulation calculation and coupling solution of outdoor microclimate and building energy consumption model methods.Meanwhile,a green landscape layout strategy based on outdoor microclimate improvement has been put forward.Then,an optimization model for greening landscape schemes has been established.Finally,a comprehensive comparative analysis of different greening landscape schemes has been conducted.The main conclusions are as follows:1)The influence of different green landscape elements on outdoor microclimate has been concluded.The microclimate parameters of 9 measuring points around the typical house in Panlou Village,Xuzhou,in winter and summer were measured on site and numerical simulated by ENVI-met which is a software for microclimate simulation.The results showed that compared with the measured data,the simulated data of temperature,humidity and wind speed were within the allowable range of error,the coefficient of determination of the two was greater than 0.85,which meant that outdoor microclimate changes can be predicted smoothly by ENVI-met.Besides,the greening landscape elements had a certain regulating effect on outdoor microclimate,which was obvious in summer,but not obvious in winter.2)The effects of green landscape on building energy consumption by adjusting outdoor microclimate were studied.The quantitative analysis of the influence of outdoor microclimate on building energy consumption has been realized by coupling simulation of ENVI-met and Design Builder which is a software for building energy consumption simulation.The specific operation of this coupling simulation strategy was to calculate microclimate parameters around the target building firstly,then import these parameters into Design Builder as meteorological boundary conditions,finally calculate building energy consumption with Design Builder.The results showed that using green landscape to adjust outdoor microclimate had a certain extent on reducing building energy consumption.3)The influence of different green landscape elements on adjusting outdoor microclimate and energy consumption of single buildings were studied.The outdoor microclimate and building energy consumption of 12 different green landscapes were simulated by the coupling simulation method established in this study.The results showed that comprehensive outdoor microclimate regulation and building energy consumption,the residential area should adopt a determinant layout.Meanwhile,vegetation greening could significantly reduce air temperature and wind speed and increase humidity around the building.And the richer greening structure,the more significant the microclimate effect,and at the same time,the better building energy efficiency.Water could also make a limited extent on reducing air temperature and increasing humidity.4)An optimization model for greening landscape schemes has been established,and a comprehensive comparative analysis of different greening landscape schemes has been conducted.Considering the moderating effects of outdoor microclimate and effects of building energy-saving,4 greening landscape layout strategies were proposed.The optimization model of the greening landscape plan has been established by using P₁-P₂ model.A comprehensive analysis of outdoor microclimate effects of these 4 different strategies and the energy-saving effects of target buildings has been done.The results showed that compared with project 1,Scheme 2,3,and 4have good building energy-saving effects,which were 5.6%,6.1%,and 6.0%,option3 is the best.And the net present value of the whole life cycle were 10.21 million yuan,the investment payback periods were 3.2a,which has good economic benefits.There are 101 figures,28 tables and 125 references.