In present communication, internal irreversibility at each component of a single effect vapour absorption refrigeration system have been evaluated and presented. The irreversibility is induced owing to the pressure drop in the shell ad tube and energy exchange between the working fluids. Each component of the system is considered to be a shell and tube type energy exchanger with slight modifications depending upon the applications. Each energy exchanger is divided into three control volumes, namely tube wall, shell and tube for which both energy and exergy balances are applied to evaluate exergy destruction rate (EDR). Moreover, the overall EDR in the energy exchanger is then estimated in the form of pumping work and energy exchange duty. This objective function is further simplified in the form of design parameters such as tube diameter, friction coefficient, number of tubes, number of baffles and overall heat transfer coefficient for the energy exchanger. In addition to this, optimum generator temperature and minimum EDR of each component of the absorption system have been tabulated and presented. Results show that for a single tube, the UA value in each system component ranges between 2.99 W/K to 48.9 W/K depending on the operating conditions and design parameters of the system. Also, number of tube in the system components ranges from 1108 tubes to 24803 tubes and the number of baffles in the respective components ranges from 2 to 7.