Without the circulating pump 72 to force {HEAD ~ convection} of the heated liquid in {TAIL ~ the shell} 12, the heat exchanger 10 would lose much of its efficiency 
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Without the circulating pump 72 to force { HEAD ~ convection } of the heated liquid in { TAIL ~ the shell } 12 , the heat exchanger 10 would lose much of its efficiency
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH