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Calculate The Rate Of Leak In Heat Exchanger

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#1 premjagan

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Posted 23 December 2012 - 12:23 AM

dear experts,

In ammonia plant MTS exit BFW pre-heater( heat exchanger) got leaks. It leads to increase the partial pressure of H2O in LTS inlet. So it may lead to condense on catalyst bed because it also very nearer to dew point. i calculated the dew point at LTS inlet,As so we maintain higher temperature by bypassing the gas from BFW heater to avoid condensation on LTS catalyst.

Now i want to calculate the rate of BFW leak in the particular exchanger.Is it possible?

#2 S.AHMAD

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Posted 23 December 2012 - 07:34 PM

Cannot determine precisely since the size of leak is unknown.

#3 premjagan

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Posted 24 December 2012 - 03:58 AM

sir,

The gas temperature dropped almost 8 deg centigrade( in one month period) due to BFW leak. By using this data, Is there anyway to calculate how much BFW flow is required to reduce 8 deg centigrade of syn gas?

#4 S.AHMAD

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Posted 25 December 2012 - 07:18 PM

In that case suggest you do energy and mass balance to determine the BFW leakage rate. However, you need to discount the heat loss to environment. Heat and energy data prior to leakage could be helpful for comparison and estimating the heat loss to surrounding. Good luck

#5 premjagan

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Posted 26 December 2012 - 05:13 AM

Thank you Ahamed sir...... I will proceed.. i had already done the material balance. By balancing the enthalpy transfer i may get the answer i think.. Thank you once again sir for valuable reply




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