Performance Evaluation of LiBr-H2O Vapours Absorption System for an Office Building Cooling

The aim of this paper is to assess the energy performance by simulation of a single effect LiBr-H2O vapour absorption system for office room cooling under Ludhiana (31°N) climate conditions. In an absorption cooling system, compressor which is using high grade energy, replaced by a combination of generator and absorber. The low grade heat is supplied to the generator which produces the cooling effect in the evaporator section. In the present work, lithium bromide is used as absorbent and water as refrigerant. A thermodynamic simulation of the cycle is carried out to investigate the effects of office room temperature and condenser temperature on the performance of the LiBr-H2O vapour absorption system. It was concluded that coefficient of performance (COP) increases from 0.55 to 0.75 as office room temperature increases from 22 to 30°C for fixed value of condenser temperature of 46°C. The maximum COP was observed when system runs on least value of condenser temperature.