Ice making system for harmonious with environment by direct contact heat-exchange between low temperature air bubbles and water

近年来，以节能和减少夏季白天用电高峰需求为目的的空调蓄热系统得到了积极的发展。冰蓄热系统尤其受到重视，因为它有利于利用冰融化的巨大潜热。本研究的目的是探讨利用冷空气和冷水制冰浆的特性。将压缩空气吹入旋涡冷却器的冷空气吹入充满冷水的制冰区。冰块在水中是通过冷水泡和水之间的直接接触热传递形成的。观察了在空气温度、空气流速和水高等参数下的制冰特性。结果表明，在-1℃的空气温度下，制冰效率随冷空气流量的不同而不同。在大流量情况下，大于100nl /min。制冰效率90%以上。研究结果为新型冰蓄热系统的研制提供了基础资料。

Recently, a thermal energy storage system for air conditioning has been developed actively for the purpose of saving energy and reducing the peak electrical demand in the daytime during summer. In particular, a great deal of attention has been paid to the ice thermal energy storage system since it would be beneficial to be able to utilize the large latent heat of melting ice.The objective of the present study is to investigate the ice slurry making characteristics by using cold air and water. The cold air, which is made for the compressed air blew into a vortex cooler, blow into an ice making section which filled with cold water. The pieces of ice forms in the water by direct contact heat transfer between cold air bubbles and water.It was observed the ice making characteristics under some parameters of air temperature, air flow rate, and height of water. It was found that ice could be made at -1℃ in air temperature, and that ice making efficiency is different by the case of cold air flow rate. In the case of high flow rate, that is over 100 Nl/min. ice making efficiency is over 90%. The results of the present study provide fundamental information for the new ice thermal energy storage system.