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单词 log-mean temperature difference
释义 log-mean temperature difference
[`läg ¦mēn `tem·prǝ·chǝr ´dif·rǝns]
THERMODYNAMICS
The log-mean temperature difference TLM = (T2 - T1)/ln T2/T1, where T2 and T1 are the absolute (K or °R) temperatures of the two extremes being averaged; used in heat transfer calculations in which one fluid is cooled or heated by a second held separate by pipes or process vessel walls.
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