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The coefficient of performance COP* for the refrigeration system can be expressed as act act and the enhancement of COP for the refrigeration cycle is given by (2) (3) It was demon COP* 4 a°e W -AW A%COP COP* - COP COP x 100 The above discussion can be extended to a special idealized case. strated that hA AA A Itl3X The plate-fin-tube heat exchanger shown in Figure 2 and of design specified in Figure 3 was selected for the performance analysis. The geometrical parameters of Figure 4 were chosen to be of the following dimensions. ST = SL = 2.54 x 10 ^[m] =»1" centers TF = 1.78x 10_4[m]= .010"fin stock TT = 8.89 x 10 4[m] = .035" tubewall thickness DO = 1.58 x 10_2[m3 = 5/8” OD (tube material: copper; fin material: aluminum). Other parameters were selected to be: Number of modules per element channel: n =3 m -1 Number of fins per unit length of tube: FPM = 315 [m ]; i. e. , 8 fpi Velocity of the refrigerant R-12: V = 1 [m/s] Condensing temperature: T^ = 40 [c] Reynolds number of water film: Re^ = 250 Coefficient of wetness: K = 1 w Ambient air temperature Ta = 25 [c]. in All other parameters were considered as variables: Relative humidity:PDF Image | Development of the Zinc-Chlorine Battery for Utility
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