【摘要】 本文以信阳地区某冻结间的冷风机为研究对象,对结霜工况下冷风机运行情况进行理论分析,建立数学模型。进一步研究了在结霜过程中空气冷却器的传热面积、传热系数以及空气侧压降与霜层生长的变化关系。为确保冷风机在结霜工况下经济运行,本文探讨了冻结间内空气的相对湿度、冷风机进口空气干球温度以及迎面风速等对霜层生长的影响,并立足于企业生产实际情况,从寻找降低结霜速率的途径着手,对冻结间的节能操作方面提出一些建议。更多还原

【Abstract】 The theoretical analysis and the mathematics model on air-cooler’s frosting performance are provided in this paper,based at a frozen room in Xinyang area.To improve air-cooler’s working performance,further study is given to the factors that affecting area of heat transfer,coefficient of heat transfer about air coolers and air side pressure drop during frost process.The characteristics of frost growth were achieved under different inlet air temperature,relative humidity and velocity during the frosting process too.At last,the paper presents some ways of decreasing the growth rate of frost in studying production cost of the enterprises.The results may offer the basis for the evaluation of theoretical models about economical energy,which make plants run efficiently.更多还原