Mon Nov 12 08:20:57 EST 2007
Input file [ heatxchngrUS.txt ]
#----------------------Input---------------------#
mdothot		3600.0		(lbm / hr) 	
Cphot		1.00		(BTU / lbm / F)
Thotin		200		(deg F)
Thotout		150		(deg F) 	
mdotcool	3600.0		(lbm / hr) 	
Cpcool		1.00		(BTU / lbm / F)
Tcoolin		25		(deg F) 	
Tcoolout	50		(deg F) 	
Type		2		(1 = parallel; 2 = Counterflow)
 
#-----------------Output--------------------#
Qhot= -180000 BTU/hr
Qcool= 90000 BTU/hr
Qhot+Qcool must = zero or following calcs are wrong
 
Counter-flow x-chngr, Thotout must be > Tcoolin
Overall U is the overall heat transfer coefficient of the design (BTU/hr/sqft/F).
A is the effective heat transfer area of the design (sqft).
UA and Qcheck shown below is based on coolside flow.
 
LMTD =                         137.12          F
Overall U * Area =             656.36   BTU/hr/F
Qcheck =                     90000.00     BTU/hr
#.......................End of File..............#