Study On The Energy Efficiency Of Cross Laminated Timber Residential Buildings In Severe Cold And Cold Region

The construction industry consumes a lot of energy on a global scale.With rapid urbanization and the improvement of living standard,energy consumption of residential buildings in severe cold and cold region is increasing significantly.Energy saving and emission reduction is the mainstream and the consensus in our country nowadays.Cross Laminated Timber(CLT)is an eco-friendly and elegant building material,which can be utilized for the construction of energy efficient residential buildings in severe cold and cold region.Based on the above,energy efficiency of CLT residential buildings is studied via simulation in the thesis.It is verified that CLT can be used as a kind of ecofriendly building material,paving the way for the popularization of CLT in residential buildings in severe cold and cold region.The energy-saving design methods of CLT envelope structure in residential buildings in severe cold and cold region are explored,which enriches the domestic theoretical research on energysaving design methods of CLT residential buildings in severe cold and cold region.First of all,this paper sorts out the existing literature at home and abroad,summarizing the current situation and development potential of CLT in our country.And it enriches domestic theoretical research on energy efficiency of CLT residential buildings in severe cold and cold region.Secondly,a typical concrete residential building in Harbin is selected and the energy simulation experiment is carried out by using IES software.The control group is a concrete house and the experimental group is a CLT house,which verifying the energy saving of CLT as an enclosure structure material in severe cold and cold region.Energy simulation experiments are carried out for comparison experiments on building orientation,building height,plane type,envelope structure,and usage mode.Statistical software is used for data statistical analysis to quantify the energy-saving performance of CLT.At the same time,energy-saving methods in residential buildings are explored in severe cold and cold region.In the simulation experiment of building orientation,the energy-saving properties of CLT houses relative to RC houses is verified.The energy measurement table about orientation of CLT residental buildings is proposed to provide a reference for future CLT building design.At the same time,mathematical modeling can accurately calculate the relative energy consumption of CLT houses with different orientations.In the simulation experiment of building height,the energy-saving properties of CLT residences are verified and the regression equation of the body shape coefficient is proposed.At the same time,the stratified energy consumption is explored and it is found that the energy consumption of the bottom and top floors is higher and the energy consumption of the middle floors is similar and lower.In the simulation experiment of plane type,the energy-saving performance of the slab building relative to the tower building is determined,which provides a reference for the graphic design of high-rise CLT residential buildings.In the simulation experiment of envelope structure,the energy-saving contribution of the envelope structure is obtained through regression analysis.The CLT exterior wall and CLT roof design methods are explored and CLT exterior wall construction strategies and CLT roof construction strategies for each severe cold and cold region are proposed.In the simulation experiment of use mode,a more reasonable use mode is selected after analyzing comfort and energy-saving properties of each mode separately.