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1- If I knew the higher heating value of a hydrocarbon CaHb, howwould I determin

ID: 1816173 • Letter: 1

Question

1- If I knew the higher heating value of a hydrocarbon CaHb, howwould I determine its lower heating value?
2- Why are some high-efficiency residential natural gasfurnaces equipped with drain tubes ?
2- Why are some high-efficiency residential natural gasfurnaces equipped with drain tubes ?

Explanation / Answer

LHV = HHV - n hfg,H2O ===> Given HHV you canCalculate the LHV For the high-efficiency furnace, those kind of furnaces has anefficiency of 95%, and they usually have a higher compressionration ( for better burning quality! ) , so as the vapor becomecondensed, the change in temperature of the atmosphere forces thegas ( exhaust ) to be liquid!