Study On Energy Saving Of Enclosed Construction And Refrigeration System Operation Of Low Temperature Germplasm Gene Banks In China

Up to now, no standards are available for the germplasm gene bank design and construction in China.The problems and deficiency are encountered in established gene banks. In this paper, based on overall and detailed investment of enclosed construction and refrigeration system in present germplasm gene banks, in order to more economical and energy saving, the author put forward a new method to confirmation economical thermal resistance of exterior-protected construction's thermal insulating layer by use of cost-effectiveness analysis method, this can give technical reference for low temperature germplasm gene bank's construction.The exterior-protected construction and thermal insulating layer are separated in most of present low temperature germplasm gene bank. The thermal insulating layer is made of hard urethane foam as core and external layer is steel plate. By analysis of specific condition such as energy consumption of refrigeration system and appropriation expenditure, this kind of germplasm gene bank can not only save operation cost for reduction power consumption, but also convenience maintaining for manager of germplasm gene bank.The author researched the economical thermal resistance of thermal insulating layer for present germplasm gene bank. By use of dynamic payback period method, analysis economical thermal resistance, R_e, in most economic status for cost of construction and operation of exterior-protected construction's thermal insulating layer. The result showed the low temperature germplasm gene bank in Beijing zone (the temperature is -18℃±2℃, the relative moisture is lower 50%), external layer is brick-concrete, thermal-protective material is urethane foam, the economical thermo resistance is 5.370 (m2 ·K) AV when the payback time is about 5 years.