Air Source Heat Pump（空气源热泵）
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8月22日下午1：00—3：00，主题为“Air Source Heat Pump”在北京国际会议中心306会议室召开。
演讲内容摘要：
For heat pumps used in the cold regions,it is very important to obtain appropriate heating capacity. Several studies have been performed to enhance heating capacity at low ambient temperatures. The heating performance was significantly improved by the application of a variable speed compressor. However,for outdoor temperature conditions below -15oC,it is still difficult to acquire enough heating capacity above the rated heating capacity. In this study,a twin rotary type compressor with gas injection was applied to a heat pump system in order to improve the heating capacity at low ambient temperatures. The heating performance of the gas injection cycle was measured and analyzed by varying outdoor temperature and compressor frequency. The tested heating performance of the gas injection cycle was compared with that of the non-injection cycle. The heating capacity of the gas injection system was increased by 11~23% with the variation of outdoor temperature. The COP based on equal capacity was also improved by 28~35%.
第22届国际制冷大会于2007年8月21日在北京国际会议中心隆重召开，会议为来自世界各地的科学家和工程师提供一个互相交流和分享各自成功经验的机会，以使制冷技术在今后几十年保持持续快速的发展。
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