Consider a vapor absorption refrigeration system, using LiBr-Water as working fluid, with a unit capacity of...

 

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Consider a vapor absorption refrigeration system, using LiBr-Water as working fluid, with a unit capacity of 75 TR, as shown in the figure. The temperature of evaporation of 5°C, the temperature of condensation of 40°C same as the temperature of absorption. The generator exit temperature is 100°C. Assume the points 5, 7 to be saturated and points 2, 3 to be at equilibrium. Calculate the following: (a) 1-the mass flow rates of the refrigerant, weak and strong solutions. (b) 2- the concentration of strong and weak solution. If the solution heat exchanger effectiveness is 85 %. (c) 3- The temperature and enthalpy at the inlet of the generator (point 3), (d) 4- the COP of this setup. State points T (°C) P (kPa) x (%) h (kJ/kg) I 2 3 4 5 Condenser Generator Refrigerant vapor Weak solution M E Strong solution [ M-m 6 7 Evaporator Absorber 8 Qa 9 10 Consider a vapor absorption refrigeration system, using LiBr-Water as working fluid, with a unit capacity of 75 TR, as shown in the figure. The temperature of evaporation of 5°C, the temperature of condensation of 40°C same as the temperature of absorption. The generator exit temperature is 100°C. Assume the points 5, 7 to be saturated and points 2, 3 to be at equilibrium. Calculate the following: (a) 1-the mass flow rates of the refrigerant, weak and strong solutions. (b) 2- the concentration of strong and weak solution. If the solution heat exchanger effectiveness is 85 %. (c) 3- The temperature and enthalpy at the inlet of the generator (point 3), (d) 4- the COP of this setup. State points T (°C) P (kPa) x (%) h (kJ/kg) I 2 3 4 5 Condenser Generator Refrigerant vapor Weak solution M E Strong solution [ M-m 6 7 Evaporator Absorber 8 Qa 9 10