Tell about Boiler Pinch Point

 In principle Pinch Point may be considered as a measure of how extensive & how efficient is the heat utilization of a waste heat recovery system (Exhaust gas boiler).

1.       Temperature differential between temperatures of incoming water & outgoing exhaust gas.

2.       Temperature differential at evaporation usually used as a guide for efficient heat transfer across the tubes that is-

T_IN–T _OUT=T_TRANS. (Temp of exh gas)

3.       Pressure differential of exhaust gas across the tube stack.

4.       The higher the Pinch Point the longer the heat transfer surfaces & the more efficient is the waste heat recovery system (Exh. Gas boiler).