Optimization Of The Absorption Refrigeration System For Heat Recovery With Heat Pipe Heat Exchanger

Nowadays, Li-Br absorption refrigeration have widely adopted in refrigeration, air conditioning and heating domains, as the energy problem increasing, which is popularized for heat recovery. As far as the shortages of the traditional absorption system for heat recovery is concerned, in this paper, research has developed for a system employing separated-Heat Pipe Heat Exchanger (HPHX) to recovery exhaust heat of middle temperature, which directly drive the absorption chiller. Compared to the traditional ones, the new has higher heat transfer efficiency, lower first cost, corrosion resistant and operational reliability.Basing on the analysis of the heat recovery system, mathematic models of the absorption chiller, HPHE and the whole have been established, accordingly with simuilation. A visible program adopting VB programming language is realized, which is composed of three parts, such as 1) thermodynamic characters modular of the working fluids, including Li-Br/water solution, exhaust gas, water and water vapor.2) Absorption chiller modular, including three kinds of double-effect flow, and steady lumped parameter models have been established accordingly.3) HPHE modular, using equivalence remunerator calculation model.According to the preparation work, optimization analysis of the integral system and separated parts employing complex method, aiming at both performance and economical efficiency. Further, by analyzing the inner link of the two parts, parameters and targets of optimization are selected. The results indicated that, economic is the most important factor for evaluation the heat recovery system, rather than the coefficient of the performance (COP), choosing parameters properly, the minimum heat transfer area is obtained with middle COP. The economic of the heat recovery system is increased with more free heat instead of area.