吸着冷凍サイクル
吸着冷凍機は単段型・二段型・三段型となるにつれ低温熱駆動が可能となるがそれと同時に吸着冷凍サイクルに必要な反応器の個数が増え装置が大型になってしまうという課題が存在する．本研究では二段型吸着冷凍機に着目し装置の小型化，更なる低温熱駆動を目的としている．
従来の二段型吸着冷凍機は4つの反応器が必要となる．二段吸着冷凍機から反応器1つ取り除き約20%小型化した3ベッド二段型吸着冷凍機のシミュレーション解析が行われた．3ベッド二段型吸着冷凍機は装置の小型化を実現しただけでなく従来の二段型吸着冷凍機の駆動温度域(約70℃)での稼働が可能になる．
本研究の目的はシミュレーション解析が行われた3ベッド二段型吸着冷凍機の性能評価を実験的に行い吸着冷凍機の低温熱駆動かつ小型化を実現する新吸着冷凍サイクルを提案することにある． また，従来吸着冷凍機に用いられる吸着材はシリカゲルが一般的であったが，本研究ではAQSOAと呼ばれる新吸着材を用いた．（文責：秋澤研究室） 
As the number of adsorption chillers increases from single-stage to two-stage to three-stage, low-temperature thermal drive becomes possible, but at the same time, the number of reactors required for the adsorption refrigeration cycle increases, making the system larger. Akisawa group focused on the two-stage adsorption refrigerator in order to reduce the size of the system and to achieve further low-temperature thermal drive.
The conventional two-stage adsorption refrigerator requires four reactors. A three-bed, two-stage adsorption chiller, which is 20% smaller than the conventional two-stage chiller by removing one reactor, was simulated and analyzed. the three-bed, two-stage adsorption chiller is not only smaller, but can operate in the driving temperature range of the conventional two-stage chiller (about 70°C).
The purpose of this study is to experimentally evaluate the performance of a three-bed, two-stage adsorption chiller that has been subjected to simulation analysis, and to propose a new adsorption refrigeration cycle that achieves low-temperature thermal drive and miniaturization of the adsorption chiller. In this study, a new adsorbent material called AQSOA is used, while silica gel is commonly used in conventional adsorption chillers.