In {TAIL ~ the condensing reboiler}, {HEAD ~ the two fluids} are in heat exchange contact with each other but in fluid isolation from each other 
In
In { TAIL ~ the condensing reboiler } , { HEAD ~ the two fluids } are in heat exchange contact with each other but in fluid isolation from each other
REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH