The second line is configured such that {HEAD ~ the second fluid} can exchange heat with a second surface of {TAIL ~ the thermoelectric device}, and pass through a heat sink to further exchange heat 
The second line is configured such that { HEAD ~ the second fluid } can exchange heat with a second surface of { TAIL ~ the thermoelectric device } , and pass through a heat sink to further exchange heat
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH