HAI TO ALL,

i am designing a a frame air cooler in htri . The tube side flow is steam at 583 k cal/kg at a pressure 0.26 ata and flow rate 52 t/hr
the other air at ambient temperature 40 c
lmtd 8.26 c
heat rejected 21154000 kcal/hr
over all heat transfer co-efficient 511.5 kcal/hr m2 c
how to get the program calculated values for the properties and i have designed it.
me getting an error when i have run it.

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