Optimum insulation thickness for the sandwich structure livestock buildings external envelopes in different climate regions of China  

作　　者：Yang Wang Baoming Li Weichao Zheng 

机构地区：[1]College of Water Resources and Civil Engineering,China Agricultural University,Beijing 100083,China [2]Key Laboratory of Agricultural Engineering in Structure and Environment,Ministry of Agriculture and Rural Affairs,Beijing 100083,China [3]Beijing Engineering Research Center for Animal Healthy Environment,Beijing 100083,China

出　　处：《International Journal of Agricultural and Biological Engineering》2020年第1期29-41,共13页国际农业与生物工程学报（英文）

基　　金：This work was supported by National Key R&D Program of China(2018YFD0500700);and the China Agricultural Research System(CARS-40).

摘　　要：Determining the optimum insulation thicknesses of external envelopes for livestock buildings are one of the most effective metrics to decrease energy requirements.This study was carried out to determine the optimum insulation thicknesses for livestock buildings in different climate zones,to examine the effects of insulation thickness and material(foam glass,mineral wool,expanded polystyrene,foamed polyurethane,foamed polyvinyl chloride,and expanded polyethylene)on life cycle total cost,life cycle savings,and payback period.The finishing pig houses and laying hen buildings with sandwich wall structures(color steel laminboard)in five typical cities were studied using the degree-days method with economic models.Optimal insulation thicknesses ranged from 0.05 m to 0.25 m and 0.02 m to 0.24 m in finishing pig houses and poultry buildings,respectively;the life cycle total costs ranged from 16.49 to 37.98$/m2 and 13.37 to 36.84$/m2;the life cycle savings ranged from 29.13 to 220.60$/m2 and 0 to 202.13$/m2;and the payback period ranged from 1.11 to 5.81 years and 1.19 to 20.76 years,respectively.Foamed polyurethane provided the highest life cycle savings,while foam glass had the lowest.In this research,the insulation thicknesses for the sandwich structure livestock buildings external envelopes are optimized,and the energy saving can be obtained by using proper insulation thickness in different regions.Furthermore,it can increase the knowledge about energy consumption in the livestock buildings and the results can be also a useful tool for farmers.

关 键 词：livestock building insulation material optimum insulation thicknesses DEGREE-DAYS life cycle total cost life cycle saving payback period 

分 类 号：O63[理学—高分子化学]