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减少空调和通风系统运转中能量的消耗,最好的方法之一是进行(火用)分析。(火用)分析能够对许多不同的具体方案进行技术和热经济比较来选择一个经济系统,从而使选定的方案具有热力学最佳工作状态。但是进行这样的分析很难计算出湿空气气流的(火用)。以往找到的某些规律虽然正确地反映了湿空气(火用)的物理含义,但仍需进一步发展和作些详细说明。之所以这样,是因为那些规律终究包含了过热水蒸汽的焓和熵,焓熵之值没有在整个所需要的范围之内列入实用表格,而且数值也不够精确。为此,作者导出了确定湿空气(干空气和水蒸汽的混合物)气流(火用)的计算公式。
One of the best ways to reduce energy consumption in the operation of air conditioning and ventilation systems is to perform exergy analysis. (Exergy) analysis enables the selection of an economic system for technical and thermal economic comparisons of many different specific schemes so that the selected scheme has the best thermodynamic working conditions. However, it is difficult to calculate the exergy flow of the moist air by such an analysis. Although some laws found in the past have correctly reflected the physical meaning of moist air (exergy), they still need further development and some detailed explanations. The reason for this is because those laws eventually contain the enthalpy and entropy of superheated steam, and the values of enthalpy and entropy are not included in the utility table within the entire required range, and the values are not accurate enough. To this end, the authors derived a formula for determining the flow of air (exergy) of moist air (a mixture of dry air and water vapor).