Theoretical Analysis of LiBr-Water Absorption Air Condition Powered by Heated Pipe Evacuated Tube Solar Collector

The energy requirements of air conditioning systems are increasing over time.The use of solar absorption air conditioner can mitigate energy loss and reduce CO2 emissions and the need to allocate such systems is very important.In this study, a thermodynamic analysis was performed by EES software for a single-effect solar-powered absorption chiller system with a 1 kW capacity, a heat pipe evacuated tube collector was used in Nasiriyah, Iraq.In the proposed system, the temperature of the (condenser, absorber, generator, and evaporator) were assumed to be (85, 38, 37, 5) respectively and the assumed heat exchanger efficiency was 0.5% and the working pair used was lithium bromide-water solution with variable concentrations according to the change of factors for each case studied where the generator contained the strong solution (rich in lithium bromide) and the absorber contained the weak solution.The findings have shown that the absorption refrigeration cycle's (coefficient of performance) rises as the temperature of the generator and evaporator rises and progressively falls as the temperature of the absorber and condenser rises.The maximum (COP) of 0.7 was attained when the generator temperature was 100 and the heat exchanger efficiency was 0.5; COP 0.77 was attained when the generator temperature was 95 and the heat exchanger efficiency was 80%.Furthermore, the heat exchanger's efficiency greatly boosted the performance coefficient by increasing the system efficiency.