题目内容
The hot fluid A is used to heat oil in a heat exchanger. The inlet and outlet temperature for A is 300℃ and 200℃, and the oil is heated from 25℃ to 175℃, so the downstream logarithmic mean temperature difference of the two fluid is ?
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The hot fluid A is used to heat oil in a heat exchanger. The inlet and outlet temperature for A is 300℃ and 200℃, and the oil is heated from 25℃ to 175℃, so the upstream logarithmic mean temperature difference of the two fluid is ?
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