摘要 : This research review focuses on air conditioning systems that cool high-heat-generating machines like computers and telecommunications equipment, and reports on various aspects related to air-flow systems and air conditioners. In ... 展开 This research review focuses on air conditioning systems that cool high-heat-generating machines like computers and telecommunications equipment, and reports on various aspects related to air-flow systems and air conditioners. In particular, we introduce current R＆D work on air conditioning flow systems, especially raised-floor blowing systems, and describe methods for allocating air flow for equipment with and without fans, calculating indoor temperature distribution, and evaluating energy conservation. We also describe R＆D work on various types of air conditioners that operate at low compression ratios, apply the thermo-siphon principle, and have indirect and direct outside-air cooling functions to achieve efficient cooling operations when outside temperature is low, considering the need for year-round cooling. 收起