请教Maximum fractional capacity:和Maximum capacity f ...？ 附上aspen自带的解释内容： for structured packings, aspen plus provides vendor procedures for each type. if you specify the maximum capacity factor, aspen plus bypasses the maximum capacity calculations. the definition of approach to maximum capacity depends on the type of packings. for norton imtp and intalox structured packings , approach to maximum capacity refers to the fractional approach to the maximum efficient capacity. efficient capacity is the operating point at which efficiency of the packing deteriorates due to liquid entrainment. the efficient capacity is approximately 10 to 20% below the flood point. for sulzer structured packings (bx, cy, kerapak, and mellapak), approach to maximum capacity refers to the fractional approach to maximum capacity. maximum capacity is the operating point at which a pressure drop of 12 mbar/m (1.47 in-water/ft) of packing is obtained. at this condition, stable operation is possible, but the gas load is higher than that at which maximum separation efficiency is achieved. the gas load corresponding to the maximum capacity is 5 to 10% below the flood point. sulzer recommends a usual design range between 0.5 and 0.8 for approach to flooding. for raschig random and structured packings , approach to maximum capacity refers to the fractional approach to maximum capacity. maximum capacity is at the loading point. for all other packings , approach to maximum capacity refers to the fractional approach to the flood point. because there are different definitions for approach to maximum capacity, sizing results are not on the same basis for packings from different vendors, even when you use the same value for approach to maximum capacity. direct performance comparison of packings from different vendors is not recommended. 我查了一下aspen自带的帮助文件，其中说的很明白，大家可以看看。 查看更多
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