With ph, ts diagram   A refrigerator  based  on  ideal  vapor  compression  cycle  operates  between  the  temperature  limits  of  -20 deg C  and  40  deg  C . The  refrigerant  enters  the  condenser  as saturated  vapor   and  leaves as  saturated  liquid  .  The  enthalpy and  entropy  values  for  saturated  liquid  and  vapor  at  these  temperatures   are given in  the  table  below:      T(OC)     hf (KJ/kg)     hg (KJ/kg)     Sf (KJ/kg.K)     Sg (KJ/kg.K)  -20     20     180     0.07     0.7366  40     80     200     0.3     0.67    If  the  circulation  rate  of the  refrigerant  is  0.025  kg/sec  , the  refrigeration  effect  is  equal  to         A)     1.2  kW     B)     2.5  kW       C)     3.2  kW     D)     2.1  kW

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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With ph, ts diagram

  A refrigerator  based  on  ideal  vapor  compression  cycle  operates  between  the  temperature  limits  of  -20 deg C  and  40  deg  C . The  refrigerant  enters  the  condenser  as saturated  vapor   and  leaves as  saturated  liquid  .  The  enthalpy and  entropy  values  for  saturated  liquid  and  vapor  at  these  temperatures   are given in  the  table  below: 
 
 
T(OC)     hf (KJ/kg)     hg (KJ/kg)     Sf (KJ/kg.K)     Sg (KJ/kg.K) 
-20     20     180     0.07     0.7366 
40     80     200     0.3     0.67 
 
If  the  circulation  rate  of the  refrigerant  is  0.025  kg/sec  , the  refrigeration  effect  is  equal  to    
    A)     1.2  kW     B)     2.5  kW       C)     3.2  kW     D)     2.1  kW 
 

 

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