CO2 and Natural Refrigerants Thermodynamic Systems

慧聪暖通与舒适家居网 2007-08-23 18:13 来源：慧聪空调制冷网

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本场研讨会主讲嘉宾之一

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8月23日下午1：00-5：00，主题为"CO2 and Natural Refrigerants Thermodynamic Systems（二氧化碳和自然制冷系统）"在北京国际会议中心306会议室召开。

演讲内容摘要：

This study investigates the performance of an NH3/CO2 cascade system for supermarket refrigeration application in a laboratory environment. The tested CO2 system is designed and scaled to fulfil the requirements of an average size supermarket in Sweden. Possibility for hot gas defrost in the freezers has been investigated and compared to the conventional electric heaters defrost method. Two cascade condenser arrangements have been evaluated. The cascade system has been compared to R404A system installed in the same laboratory. The results show that connecting the cascade condenser via thermosyphon or hot gas de-superheat arrangements yields good system stability and heat transfer performance. Hot gas defrost successfully

defrosted the freezer evaporator but with long period and higher energy consumption compared to the conventional electric defrost method. The tested cascade system had up to 60% higher total COP compared to the R404A system installed in laboratory.

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。