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本文分析了冷库隔热层厚度对冷库土建投资和运行费用的影响,根据使用期内冷库的总费用应为最小的原则,讨论了求冷库隔热层最佳厚度的方法,并给出了冷库几种围护结构隔热层最佳厚度的计算公式。最后,举例说明了公式的应用并讨论了应用这些公式的有关问题。 相似文献
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根据开展水利工程建设环境监理的工作实践,探讨水利工程建设环境监理工作方式和内容,提出环境监理工作中需要进一步改进的方面。 相似文献
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本文以北京典型的水泥企业为例,实地检测了水泥正常生产过程中的PM2.5排放量,对其排放特征进行了系统研究,得出了北京水泥企业PM2.5的排放因子。 相似文献
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膨润土增强的黄土和红土的性质 总被引:2,自引:0,他引:2
Loess and laterite distributed widely in the northern and southern China cannot be directly used as the natural barrier to isolate the solid waste because of their high hydraulic conductivity. In this paper, they are enhanced by bentonite to improve their hydraulic performance. The impact of bentonite content and water content on compressive strength of the compacted soil was investigated. The effects of bentonite content, water content, dry density and hydraulic gradient on the hydraulic conductivity were studied in detail. For the laterite and the laterite with 8% of bentonite, the experimental results of hydraulic conductivity can be applied in the engineering design. However, for the loess and the bentonite enhanced loess, those of hydraulic conductivity can not be directly applied in the engineering design because their hydraulic performance does not comply with the Darcy‘s law. These experimental results have to be carefully modified before application. 相似文献
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由于能源短缺,所以开发和节约能源的问题已成为我国建设之中的当务之急。在冷库中如何节约能源的问题正逐步为企业的各级领导所重视,对一个已建成投产的冷库节能重点应放在操作、管理及技术改造上,这点已被公认。而一个新建冷库在设计过程中如何考虑为以后投产打下节能基础这方面似乎还没引起足够的重视。比如有的冷库在选配压缩机时只是根据各冷间总的机器负荷考虑,认为压缩机的总产冷量能满足总的机器 相似文献
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