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例题5-2讨论不含水空气的处理过程,入口压力为100kPa,入口温度为34℃。目的是将68000kg/h 的空气压缩到700kPa。假设换热器的压降是进口压力的2%,且气体的返回温度为38℃。确定压缩机结构尺寸、级数、转数、功率和出口温度。为简便起见,特意选定不含水空气。其分子量是28.96。假如空气含有水分,则含水量将降低其分子量。这种分子量可由第四部分概述的步骤进行确定,或者参考文献中
Example 5-2 discusses the treatment of water-free air at an inlet pressure of 100 kPa and an inlet temperature of 34 ° C. The purpose is to compress 68000 kg / h of air to 700 kPa. Assume that the pressure drop across the heat exchanger is 2% of the inlet pressure and the return temperature of the gas is 38 ° C. Determine the compressor structure size, series, revolutions, power and outlet temperature. For the sake of simplicity, deliberately selected without water. Its molecular weight is 28.96. If the air contains moisture, the water content will reduce its molecular weight. This molecular weight can be determined by the steps outlined in Section 4, or in the literature