【Daily Question】Theoretical Foundation 2021.03.09
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Multiple-choice question: The question is shown in the image ( ). Answer: D. Hint: Those who can explain the solution process will receive an additional reward; the answer can be submitted there
【Correct answer: D】 In engineering, multi-stage compression is typically used, along with inter-stage cooling, to reduce energy consumption during the compression process. In multi-stage compression of compressors, the inter-stage pressures vary, and thus the total shaft work required also varies; the most favorable inter-stage pressure is one that minimizes the total shaft work required. The total shaft work for two-stage compression is:; to minimize the total shaft work, set, which gives:. By the same principle, when applied to multi-stage compression with inter-stage cooling, the optimal allocation principle of equal pressure increase ratios for each stage can be used to minimize the total work consumption of the compressor.