提出了一套关于冷藏库底部保温的最佳R值的建议。该分析是基于一个简化工具计算冷藏库地基热增益的结果。考虑了三种绝缘结构:水平均匀绝缘、水平周边绝缘和垂直周边绝缘（沿基础墙放置）。这些建议基于使用寿命周期成本（LCC）方法进行的详细经济分析。此外，还讨论了保温类型、位置、板尺寸和土壤导热系数对最佳保温R值的影响。在经济分析中，还考虑了制冷系统的效率和电力成本。研究发现，美国所有国家的冷冻柜都需要水平均匀的隔热结构。 美国气候。这种隔热材料的成本效益R值通常随着板尺寸的减小和土壤热导率的增加而增加。此外，研究发现，在冷却冷却器和冷却器上添加隔热材料在寒冷气候下可能并不总是具有成本效益。单位:双引文:ASHRAE交易，第106卷，第。2.

A set of recommendations on the optimal R-values for thermal insulation to be placed underneath the foundation of refrigerated warehouses is presented. The analysis is based on results from a simplified tool for calculating foundation heat gain for refrigerated warehouses. Three insulation configurations are considered: horizontal uniform insulation, horizontal perimeter insulation, and vertical perimeter insulation (placed along the foundation walls). The recommendations are based on a detailed economic analysis using the life-cycle cost (LCC) method. Moreover, the effects of insulation type, location, slab size, and soil thermal conductivity on the optimal insulation R-value are discussed. The efficiency of the refrigerating system and the electricity cost are also accounted for in the economic analysis. It was found that the horizontal uniform insulation configuration is required for freezers in all U.S. climates. The cost-effective R-value for this insulation typically increases as the slab size decreases and as the soil thermal conductivity increases. Moreover, it was found that adding insulation to chilled coolers and coolers may not always be cost-effective in cold climates.Units: Dual