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Unformatted text preview: F . Btu/h.ft 427 . 9 ) 10 273 . 1 ( ft 20 F Btu/h.ft. 01481 . 10 273 . 1 ) 7290 . ( ) 10 506 . 9 ( 037 . Pr Re 037 . 2 4 4 3 / 1 8 . 6 3 / 1 8 . = = = = = = = Nu L k h k hL Nu L Since the refrigeration system is operated at half the capacity, we will take half of the heat removal rate & ( ) , Q = = 600 60 2 18 000 Btu / h Btu / h The total heat transfer surface area and the average surface temperature of the refrigeration compartment of the truck are determined from A = 2 20 ( ft)(9 ft) + (20 ft)(8 ft) + (9 ft)(8 ft) = 824 ft 2 F 77.7 = = = = ) ft F)(824 . Btu/h.ft 427 . 9 ( Btu/h 18,000 F 80 ) ( 2 2 s conv s s s hA Q T T T T hA Q & & 718...
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This note was uploaded on 01/22/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.
 Fall '10
 Dr.DanielArenas
 Thermodynamics, Convection, Force, Mass

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