Simulation On Direct-fired Absorption Refrigerator In Airconditioning System

Air-conditioning system is necessary to marine both above and below the water, because it can ensure the microclimate conditions for people to live and the air parameters for all sorts of chambers. When a submarine stops by the bank in summer, much unwanted humidity and heat needs to discharge so that a set of air-conditioning system is required. In this dissertation, a direct-fired lithium bromide absorption refrigerator is chosen to be as the cold source. This kind of refrigerator adopts a working pair which has no ozone depletion effect or global warming effect. It also can save electric power and release the tense situation of electricity using in cities and a positive action on balancing electricity using for seasons will be obtained. So developing and researching on absorption refrigerator makes important and actual sense to make use of energy reasonably.In this direct-fired lithium bromide absorption refrigerator, complicated processes of heat and mass transfer are involved. Computer simulation technique is one effective way to find out the relationships of the parameters in it. This dissertation researched on this kind of refrigerator, analyzed its running characteristics and heat transfer rules, built mathematical models and represented the thermodynamic processes, then discussed variation of external parameters of the refrigerator and the air-conditioning system, set up the coupling models between them. After that, by using Matlab programming language, three main simulation programs were written: refrigerator designing program, refrigerator operating under variable conditions program, and air-conditioning system operating under variable conditions program. The operating performance could be analyzed quantitatively by the results, which can provide bases for optimization designing and operating so as to match the parameters reasonably and save the energy.