デシカント空調機を用いた冷水熱源の作成の実験的検討: 家庭用燃料電池の廃熱を利用した住宅における省エネかつ快適な冷暖房方式の開発

摘要

Heat use in the residential, most of the thermal use is space heating and hot water heating. In summer, a cooling demand is greater, the heat source of cooling should also be considered. Regarding the efficient use of heat by cogeneration, it is a fundamental requirement. As a device of heating and cooling heat source by using the waste heat from cogeneration, the absorption chiller has been spread However, the big size of equipment and the use of chemical materials (lithium chloride) are not suitable for a residential housing. In recent, an adsorption chiller has been developed using adsorbent material such as silica-gel. However, it is difficult to apply in the residential in terms of maintenance which is a need to keep the vacuum state. Desiccant air conditioner is applying the adsorbent material. It is widely used in humidity control. Moreover, it can be supplied to the cooling heat source by spraying water to created dry air in atmospheric pressure. The purpose of this study is to develop a prototype of desiccant airconditioning system utilizing the adsorption refrigeration cycle in atmospheric pressure with cogeneration for residential use. The chilled water temperature obtained by spraying water in dry air at atmospheric pressure is about 20 ℃, cannot reach at 5 ℃〜7 ℃ water temperature for space cooling which uses convection air conditioner. But, it can be solved in combination with radiation cooling system.%本報では冷房における熱源として除湿空調でよく用いられるデシカント空調機からの低湿空気を利用することにし，家庭用燃料電池の廃熱利用を模擬した実験で水噴霧による冷水作成の出力パターンを把握した。下記に本稿で得た知見を述べる。(1)本システムにおいて熱交換器で吸着時に熱が発生し，熱交換器に26℃で供給される熱源冷水と熱交換され，熱交換器自身が持つ熱容量が大きいため，外気が加熱される。その後，加湿ュニットで冷水との水蒸気•熱交換によって空気は冷却され，26℃より低い温度で給気される。