Direct Evaporative Cool Storage Process Dynamic Simulation And Experimental Study

To balance peak and valley load of electrical net and adjust the consumption of runningcosts of refrigeration system. Recently much attention has focused on the development of icethermal storage conditioning system. Generally speaking, there are two major kinds of ice-makingproduct(two kinds of performance of ice storage system): the static and the dynamic icestorage system. Nevertheless, because of simplicity, convenient, the former has been frequentlyapplied in practical applications. But, with the increasing of ice thickness, the thermal resistancebetween water and cooling media become greater, so the temperature of evaporator is alsodecreasing. It leads to the decrease of ice-making rate, and more energy been exhausted. Thoughit has been well developed for many years, the performance efficiency is still need to be furtherimproved. To overcome the shortcomings of the static ice-making, the dynamic ice-makingtechnology has been studied. Through the experimental research of dynamic ice-on-helical coilcooling system, we can realize the characteristics of the system(change of the temperature, icingthickness, ice-making rate, compressor power and COP), verify that dynamic ice-making is a efficient method to improve the efficiency of refrigeration system. According to the flow and heat transfer characteristics of helical-coil, a dynamic unsteadymathematical model of evaporator is build, with the method of distributed. Considering therefrigerant property parameters' change, refrigerant dynamic equations in coil were set up, andan steady energy equation which can connected the equation of liquid-phase with vapor-phase isproposed. The dynamic system model can be used to predicted the system performance at variousstate. The other part of this master dissertation, the experimental research on the mechanism ofice-storage processes on external surface of helical coil is studied. The comparisons between thestatic cooling storage and the dynamic cooling storage can supply experimental data to select themp orbo ~ ~ peThe work for a good for to the - Of pe for bo pe TondIhe the W wh to ds the pe of for bo, whl - the We pesds edIbe the' ch pe ofpe be -...