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本文对无锡地铁控制中心大厦项目变频多联式空调系统空调室外机的夏季安装环境进行了CFD模拟分析计算,根据CFD模拟分析计算的结果对变频多联式空调室外机的平面布置、成排机组间安装间距、机组安装高度、外围玻璃幕墙形式等做了相应的设计调整,以满足变频多联式空调室外机的夏季排热通风要求。 相似文献
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《青岛理工大学学报》2015,(5)
运用CFD数值模拟软件对某高层建筑空调室外机的风环境进行模拟,研究室外机放置于风井中时室外机散热对上层设备的影响.模拟室外机未加导风罩情况下的温度场,发现下层室外机的排风导致上层室外机回风温度升高显著.室外机增加导风罩后,室外机的回风温度平均降低了10℃左右,优化了室外机的风环境,提高了空调的制冷性能. 相似文献
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《建筑热能通风空调》2017,(5)
为了保证建筑物外立面的美观性,VRF空调室外机的放置平台常被各种百叶窗遮挡起来,百叶窗叶片的倾斜角度、方向和开口率直接影响室外机的散热效果,从而影响空调的运行效果。本文通过数值模拟对室外机周围的气流环境进行了计算分析,研究了百叶窗参数对室外机散热器进风温度的影响。计算结果表明:叶片倾斜角度越大,室外机散热效果越差;开口率越小,室外机散热效果越差。为了满足室外机的正常运行,空调机位外立面处的百叶窗倾斜角度和开口率必须满足设计要求。 相似文献
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采用CFD模拟软件对某高层建筑空调室外机组附近环境的速度场和温度场进行数值模拟,并考虑当地气象条件的影响,通过对比有无室外风情况的模拟,观察室外机冷凝热的散发情况,得出各层空调外机互相之间的影响,结果表明本次设计中,空调室外机组的运行环境良好,外机的布置结构合理。 相似文献
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分析空调室外机可能发生泄漏的部位及室外机附近可能出现的引火源.参照国内普通居民住宅的室外机安装间距,建立了空调室外机燃爆实验平台.对使用R290室外机的着火后持续燃烧进行了实验,结果表明在快速泄漏(320 gR290在5~7 min完全泄漏)的情况下,实验用的室外机被完全烧毁,但是未对同一高度的旁边的室外机造成损坏,也未引燃其上部或下部的室外机或造成损坏.对使用R290的空调室外机泄漏后的爆炸伤害范围进行了实验和数值模拟研究,结果表明R290在室外泄漏后发生爆炸对其旁边及上部的室外机基本没有损坏. 相似文献
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变频空调器节能特性分析 总被引:4,自引:0,他引:4
本文分析了变频空调器的基本原理、主要优点,着重分析了其节能特性。变频空调器的节能特性主要体现在不断变化的环境和负荷需求下,能够连续调节系统出力,保持系统的高效运行,尤其在长期运行时具有非常明显的节能效果。 相似文献
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针对温湿度耦合控制空调系统存在能耗大、设备工作效率低等问题,提出了对空调系统采用温湿度非耦合控制的方法,以提高空调系统的效率,降低空调系统的能耗。 相似文献
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结合某酒店空调设计,从建筑空调系统设计方案的角度概述了利用新风换气机配合水源热泵机组为建筑制冷和制热的节能措施,并对系统运行费用进行了分析,为类似工程暖通空调系统设计提供了参考。 相似文献
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Yusuke Tahara Naomi Morito Hajime Nishimiya Hideyuki Yamagishi Masaki Yamaguchi 《Building and Environment》2009
In order to improve environmental condition such as humidity and airflow in living spaces, a whole ceiling-type air conditioner is proposed. This novel air conditioner exhaust dispersed airflow from the whole ceiling by using a 3-dimensional knit fabric. The purpose of this paper is to reveal the effects when controlling humidity and airflow using the whole ceiling-type air conditioner compared to a commercialized concentrated exhaust air conditioner (normal-type air conditioner) under the same temperature. Salivary α-amylase activity (SAA) was used as an index of sympathetic nervous activity. An acute experiment for a 15 min period was conducted using 12 healthy young female adults. No significant differences in room and skin temperatures were observed between the whole ceiling-type air conditioner and the normal-type air conditioner. The whole ceiling-type air conditioner showed 11.1% lower humidity than the normal-type air conditioner. The whole ceiling-type air conditioner showed one-thirteenth the airflow of the normal-type air conditioner. As a result, the PMV of the whole ceiling-type air conditioner was more comfortable level than the normal one. Moreover, subjective evaluation questionnaire revealed a significant difference was observed in wind perception (windy). The SAA of subjects under the whole ceiling-type air conditioner showed significantly low values compared with the normal-type air conditioner. It was found that the subject's sympathetic nervous activity has been inactivated under the conditions of the whole ceiling-type air conditioner. Thus, it was revealed that the whole ceiling-type air conditioner provides a more comfortable air environment by reducing physical stimulations to humans. 相似文献
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本文结合壁挂式房间空调器的使用特点,运用CFD方法模拟室内空调热环境,对上出风壁挂式空调器的热舒适性进行了研究分析;同时通过搭建房间环境热舒适实验室,对模拟和实验结果进行对比和分析,验证数值计算模型的准确性. 相似文献
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Masaki Yamaguchi Takayuki Takahashi Yuichiro Yoshino Makoto Sasaki Hajime Nishimiya 《Building and Environment》2010
The purpose of this paper is to reveal both the psychosomatic and the physical effects of local air velocity from an air conditioner using biomarkers which can be collected noninvasively. Salivary α-amylase activity (SAA) and salivary cortisol were used as the indexes of psychosomatic effects. The total protein (TP) collected from stratum corneum was used as an index of the physical condition of dry skin. A continuous experiment over a 5 days period in summer was conducted using 8 healthy young male adults for 2-types of airflow conditioners, a whole ceiling-type air conditioner (without local air velocity) and a normal-type air conditioner (with local air velocity). The subjects felt cool, windy, dry and uncomfortable when under the normal-type air conditioner as determined in a subjective evaluation. The SAA under the normal-type air conditioner fluctuated more widely than with the whole ceiling-type air conditioner. The level of salivary cortisol decreased more in a day under the normal-type air conditioner than with the whole ceiling-type air conditioner. These results showed that reducing local air velocity may provide more healthy psychosomatic conditions over the long-term. Moreover, the TP of a drying-exposed skin area showed a significant change during this experiment whereas the TP of drying-protected area was relatively unchanged. It was indicated that one week’s exposure to local air velocity conditions possibly influences the drying of facial skin. Thus, air movement at low velocity can be provides more comfortable conditions not only psychosomatically but also physically. 相似文献
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通过实验测试对比了不同制冷量的定速房间空调器用于住宅卧室中时的室内温湿环境状况和空调器的耗电量情况。实验结果表明,当空调器容量过大时,空调器的除湿能力下降,室内相对湿度偏高,空调器耗电量大,实验日条件下,使用1.5 HP空调器时的室内相对湿度比使用1 HP空调器的室内相对湿度高5%,而1 HP空调器耗电量比1.5 HP空调器减少12.7%。 相似文献
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