Experiment Research And Numerical Simulation Of Augmentation Ice Formation With Metal Wire Around Horizontal Pipe

Air-conditioning serves as a kind of necessaries of life is gradually into daily life.As the air conditioning installed capacity increases ceaselessly, air conditioning forelectric power grid produce peak of the burden of more and more serious. Ice storagetechnology it is aimed at this contradiction, use the off-peak electricity savings cold toreduce the power of the peak load. But the ice of the coefficient of thermal conductivityis low, ice-on-coil storage have a heat transfer bottleneck in the ice restricted the icestorage efficiency. This paper based on the abandoned metal wire has high thermalconductivity design a ice storage device, and base on the ice storage device carry out theexperiment and simulation.First of all, according to previous experiment result design a feasible scheme of thecontrast experiment and made corresponding experimental device. Then the experimentalstudy the material for metal, the heat transfer fuid inlet temperature, the heat transferfuid rate of flow, and porosity of metal wire. Experimental results indicated when theheat transfer fuid inlet temperature was-7℃, flow rate was425L/h, aluminum wireporosity was97.74%ice volume increase31.34%. Metal wire the better thermalconductivity the stronger the strengthening effect; lower the heat transfer fuid inlettemperature can increase ice volume; In a certain range, More the heat transfer fuid flowrate and smaller the wire porosity the icy strengthening effect is more obvious. To thetemperature distribution of phase change media analysis, temperature distribution in icetank appear spin flip phenomenon because of the natural convection, but in the sameexperimental conditions the wire ice storage system natural convection is more weakthan common ice storage system.Mathematical and physical model about icy making was built through assuming themetal wire and the phase change medium mixture as porous medium. Numericalsimulation using numerical simulation software test and verify the metal wire canincrease ice volume.