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When heat transfer coefficient is negative?

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Old   August 16, 2007, 04:38
Default When heat transfer coefficient is negative?
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eve
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hello

I simmulation about double-flow solar air heater.And when i check HTC.It's negative.It was wrong or not?And if it wrong the solution is?

Thank.
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Old   August 16, 2007, 08:12
Default Re: When heat transfer coefficient is negative?
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carno
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HTC can not be negative. If the value is coming to be negative, means you have entered the temperature difference a negative value. Check the delta T
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