カプセル型氷蓄熱シスムの過冷却解除に関する研究

第3報 微生物を利用した過冷却解除剤の長期安定性評価

抄録

As regards the supercooling phenomenon, which is important factor in encapsulated ice system, we studied the supercooling release agent using the microorganism. Though the ice nucleation active bacteria had the high super cooling releasing ability, it was proved that the performance gradually lowered in long terms continuous use, when the live microorganisms were used. In order to improve the sustainability of the super-coolingreleasing ability through the control of the metabolism of the micro-organisms, the effects of typical sterilization methods were compared using live E. ananas of which the releasing ability is the highest of some ice nucleation active bacteria. It was found that ultraviolet and gamma-ray irradiations produced excellent results in the thousands repeated freezing-melting tests of water to which sterilized E. ananas were added.
In addition, some thousands of heat storage capsules with ultraviolet sterilized E. ananas were built a prototype. From the evaluation of the total heat exchange of encapsulated ice system, high supercooling releasing ability was indicated.