The evaporator was heated by hot water 60, 70 and 80oC, heat input both pipes behave almost
similarly over all The angle work of pipe ranges. For pipe modifying the inclination angle of evaporator and condenser sections 90o pipe we can observe The angle work of pipe as the optimum angle 0 - 150 of heat transfer with the maximum efficiency of 67% and that of good working fluid was R134a.