EXERGOECONOMIC ANALYSIS OF A SINGLE PRESSURE ABSORPTION REFRIGERATION CYCLE

This article presents a thermodynamic modelling of a single pressure absorption refrigeration system, starting from the concepts of the 1 st and 2 nd Law of the Thermodynamics and from the cost exergetic and monetary theory, that it allowed to evaluate the energetic, exergetic and exergoeconomic performance of this system through parametric simulation. The cycle in study is the diffusion absorption one, operating with three working fluids: ammonia as refrigerant, water as absorbent, and helium as auxiliary gas. The circulation of the working fluids is driven by a bubble-pump and the pressure equalization throughout the cycle is provided by the auxiliary gas. The computational code was developed at the EES (Engineering Equation Solver) Software for the energetic and exergoeconomic analysis having been supplied as main entrance parameters the concentrations of the solution ammonia-water in the input to the generator and in the input to the absorber of the system, condensation temperature and heat supplied to the steam generator. Through the code, were evaluate COP, the irreversibilities and the degree of perfection of each component.