【作者】 刘鹏；

【导师】 谢军龙；

【作者基本信息】 华中科技大学 ， 供热、供燃气、通风及空调工程， 2009， 硕士

【摘要】 独立新风系统(DOAS)这个被美国能源部列为21世纪美国最具优势的空调技术一经提出,便得到了国内外相关人员的广泛关注。而它与辐射冷吊顶系统(CRCP)的结合造就了一种新型、高效、节能、舒适的空调系统。本文采用软件模拟的方式对独立新风结合辐射冷吊顶系统(DOAS&CRCP)在夏季工况的节能性与舒适性进行了模拟研究。以武汉某公共建筑一标准层为建筑载体,运用Energyplus软件将该系统与一次回风全空气系统、风机盘管加新风系统进行设计日与夏季空调季的能耗模拟,得出了本系统在设计日与整个夏季空调季分别比一次回风全空气系统节能40%与45%,而比风机盘管加新风系统分别节能25%与17%,通过各设备能耗数据的分析,得出本系统节能潜力在于冷水机组的综合COP提高以及风机能耗的显著下降这一结论。除此之外,本文对DOAS&CRCP系统的回热、操作温度差进行了研究,结果表明换热效率为0.6的全热回收器可以为该系统节能24%,而关于操作温度,DOAS&CRCP系统要比一次回风全空气系统低0.65℃左右,室内设定干球温度有1.3℃的提升潜力,模拟结果表明设定温度的提高可以带来2%-3%的能耗节省。而为了考察该空调系统在不同类型建筑以及不同气候特征地区的适用性,作者分别进行了能耗模拟,发现DOAS&CRCP系统在不同类型公共建筑中都有较好的能耗表现,而对于不同气候地区的适用性方面,模拟结果显示该系统在热湿较大的地区的节能潜力要小于相对干燥的地区。最后为了研究DOAS&CRCP系统在舒适性方面的优势,作者运用AIRPAK软件对该系统和一次回风全空气系统进行建模,通过分析室内温度场以及速度场,得出前者无论是在室内温度场的均匀性还是送风舒适性上都有明显优势。更多还原

【Abstract】 The Dedicated Outdoor Air System(DOAS) system is listed by the US Department of Energy as one of the most advantageous HVAC systems in the 21th century. This system attracted a lot of attention around the world once it had been brought up. And the combination between DOAS and Ceiling Radiant Cooling Panel (CRCP) can not only settle the condensation problem, but also provide an efficient、energy-conservation HVAC system.This paper aims to investigate on energy conservation and indoor comfort of DOAS&CRCP system in summer. It uses one floor of public building in wuhan as a vector, and initiates a energy simulation for All-Air system, DOAS&CRCP system, FC&OA system by Energyplus software. It’s concluded that DOAS&CRCP system has 40%,45% energy-conservation potential in design-day and cooling season respectively, compared with All-air system, as for the FC&OA system, the number is 25% and 17%. And after the energy consumption figures of equipments is analyzed, we reach the conclusion that the energy-conservation potential is attributed to the improvement of comprehensive COP and significant reduction in energy consumption of central fan.Besides, the research on influence of heat recovery and operative temperature on energy-performance of DOAS&CRCP system has disclosed a fact that DOAS&CRCP system could have a 24% energy-reduction in Wuhan when the system make use of Heat Recovery Device with the efficiency level of 0.6. And the operative temperature of DOAS&CRCP system is 0.65℃lower than All-Air system, in another word, the setpoint of design indoor dry temperature in summer could have 1.3℃increase, which will lead to 2%-3% energy-conservation. And author have do some research on energy-consumption in different kinds of public buildings, and the figures indicate that DOAS&CRCP system could adapt to all these buildings and have a very good energy-performance. Apart from that, the system adaptability in different sorts of region of DOAS&CRCP system in summer is investigated, the result shows that the system has a larger energy-conservation potential in relatively dry areas. As for the indoor comfort, author has compared the temperature field and velocity field of DOAS&CRCP system and All-Air system with the AIRPAK code. The data shows that the former system could provide a more comfortable indoor environment.更多还原