许多变量影响产品冷却速度和/或水果和蔬菜强制空气冷却系统的总成本。这些包括:产品尺寸、形状和热性能；产品配置（无论是散装还是装在装运箱中）；纸箱通风区域；冷却时的深度产品负荷；初始产品温度；期望的最终产品温度；冷却空气的流速、温度和相对湿度；环境温度；每年的运营时间；冷却空间、热交换器、压缩机和风扇的单位成本； 电力成本；维护费用；劳动力成本；还有利率。工程经济模型用于研究这些变量对冷却时间和/或冷却成本的影响。还对其中一些变量之间的相互作用进行了分析，以确定在特定条件下可提供最低冷却成本的最佳值。以图表形式呈现的结果将对水果和蔬菜强制风冷系统的设计者有用。单位:双引文:研讨会，ASHRAE交易，1988年，第卷。 94磅。德克萨斯州达拉斯1号

Numerous variables affect product cooling rate and/or overall cost of forced-air cooling systems for fruits and vegetables. These include: product size, shape and thermal properties; product configuration (whether in bulk or packed in shipping cartons); carton vent area; depth product load during cooling; initial product temperature; desired final product temperature; flow rate, temperature, and relative humidity, of the cooling air; ambient temperature; time of operation per year; unit costs of cooling space, heat exchangers, compressors, and fans; electric power cost; maintenance cost; labor cost; and interest rate. An engineering-economic model was used to study the influence of each of these variables as they affect cooling time and/or cooling cost. Interactions between some of these variables were also analyzed to determine the optimum values which can give a minimum cooling cost for certain specified conditions. Results, presented in the form of graphs and tables will be useful to designers of forced-air cooling systems for fruits and vegetables.Units: Dual