Analysis of Aqueous Lithium Bromide Absorption Refrigeration Systems

Abstract

Aqueous lithium bromide absorption refrigeration systems have been studied in recent years and their advantages like environmental safety and utilization of low-grade energy have been proved. Research on improving their performance has been increasing lately. In this paper, single effect and parallel flow double-effect aqueous lithium bromide absorption refrigeration systems have been studied. Mass, energy, entropy and exergy balances have been used to model the absorption refrigeration systems. Parametric studies have been done to investigate effects of cooling load, evaporator exit temperature, condenser exit temperature, generator vapor exit temperature, absorber exit temperature, solution energy exchanger effectiveness on the performance of the system. The analyses show coefficient of performance and exergetic efficiency of double-effect absorption refrigeration is higher than those of a single-effect refrigeration. The effect of other parameters on performance of both single and double-effect systems have been described in detail in the article.

Effect of Lactate-Based Protic Ionic Liquids on the Thermodynamic and Transport Properties of Aqueous Lithium Bromide Solutions at Different Temperatures

“…Absorption refrigeration systems containing aqueous lithium bromide were invented decades ago, and these systems are very efficient and are still used today. − Emerging high-tech electrical components with high performance, such as supercomputers and render processors, led to the production of a considerable amount of heat in the system that could be harmful to a long-time process in electronic devices . Cooling of these devices is an expensive process that includes different materials, fluids, and processing apparatuses. , Liquid-circulating coolant fluids have been commercialized during the past decade. , Recently, an aqueous solution of ionic liquids has been used as a cooling liquid. , …”