New Device of Heat Pump System
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本场研讨会主讲嘉宾之一
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8月25日下午1：00-5：30，主题为"New Device of Heat Pump System（热泵系统新装置）"在北京国际会议中心308会议室召开。
演讲内容摘要：
Heat activated chillers are integrated into solar thermal systems in order to provide solar heating and cooling. During the cold season solar heat serves for space heating. During the warm season solar heat is converted into useful cooling by utilizing the solar heat as driving heat for the sorption cooling device,simultaneously avoiding overheating of the solar thermal system. A favourable situation is given when radiative heating and cooling facilities. e.g. floor or wall heating systems or activated ceilings,are applied for transferring heating and cooling to the room at moderate heating and cooling temperatures,respectively.
A low-temperature latent heat storage based on phase-change-material can be applied to cope with the given system requirements: During heating operation the latent heat storage balances heat generation by the solar system and other heat sources and the supply to the consumer. Thus a low operating temperature of the solar thermal system is accomplished yielding efficient operation with optimum solar gain. In cooling mode the latent heat storage serves as a reject heat sink for the absorption chiller in addition to a dry cooling system. By that means heat rejection of the chiller is shifted to periods with lower ambient temperatures,i.e. night time or off-peak hours,and thus the necessity of a wet cooling tower is eliminated allowing for a substantial reduction in operational effort,water consumption,and cost.
A discussion of the system concept and of the thermal design of the latent heat storage is given. Experimental results of a functional model of the heat storage and operational experience of a first full-scale demonstration of the solar heating and cooling system incorporating a recently developed compact water/lithiumbromide absorption chiller are presented.
研讨会现场PPT文件（之一）
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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