We have an enclosed ground flare system. We burn the natural gas (97% methane) coming from the various processes. The gas is flowing and tapped into KOD. The temperature of gas is -7 degrees C. After KOD the gas is flowing through pipe of 36 inch header to flare. I wanted to calculate how much the temperature is raised when it travels from KOD to flare at distance of 100m. The ambient temperature is 40 degrees C and the pipe is non-insulated and open to atmosphere.
Topic: How do you calculate overall heat transfer coefficient and mean temperature driving force?
16 February 2012
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Re: How do you calculate overall heat transfer coefficient and mean temperature driving force?
16 February 2012 at 1:29pmThe solution to this problem is obtained by treating the pipe as a heat exchanger and calculating the overall heat transfer coefficient and mean temperature driving force. The external heat transfer coefficient will be a function of weather conditions (i.e., wind speed, solar radiation, precipitation). Refer to Perry's Chemical Engineers' Handbook (Chapter 5) for appropriate correlations to use.
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