共查询到19条相似文献,搜索用时 171 毫秒
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对铝箔金属填料直接蒸发冷却空调机进行了实验研究。分析了进口空气干球温度、相对湿度对空调机降温及冷却效率的影响,为直接蒸发冷却式空调机性能的提高具有一定的参考意义。 相似文献
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再循环蒸发冷却技术及其应用 总被引:7,自引:1,他引:6
基于直接蒸发冷却和间接蒸发冷却方法,提出了一种再循环蒸发冷却方法。设计了一套再循环蒸发冷却装置,并通过试验测试了它的冷却效果。对再循环蒸发冷却技术在空调行业的应用进行了具体分析,提出了相应的系统应用设计方法。最后指出这种技术为开发节能环保空调设备和空调系统提供了一个新的途径。 相似文献
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本文介绍了直接蒸发冷却空调顺的现场测试方案及测试结果。在测试过程中,蒸发冷却效率E值达到80%上以,装直接蒸发冷却空调顺的房间室内空气温度维持在26-27℃之间,与未装空调器的房间相比,要低2-3℃,通过本次现场测试表明,对于哈尔滨地区,对空调要求不高的场所,可以使用直接蒸发冷却空调器,对于高温场所作为降温用是一种理想的节能型的降温设备。 相似文献
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四级蒸发冷却组合式空调机组阻力测试与分析 总被引:1,自引:0,他引:1
蒸发冷却组合式空调机组中,送风机是主要的耗能设备。以西安地区的一台5000m3/h风量的四级蒸发冷却组合式空调机组为例,通过实际测定各个功能段的阻力,得出该四级蒸发冷却组合式空调机组的阻力,为选用四级蒸发冷却组合式空调机组提供参考依据,并且分析了目前存在的三种间接蒸发冷却器的阻力。 相似文献
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Evaporative cooling is able to generate the cooling medium at a temperature approaching to the ambient wet bulb temperature. In this paper, a low-energy air-conditioning strategy is proposed, which is a combination of cooled ceiling (CC), microencapsulated phase change material (MPCM) slurry storage and evaporative cooling technologies. The assessment of evaporative cooling availability and utilization is done for five representative climatic cities, including Hong Kong, Shanghai, Beijing, Lanzhou and Urumqi in China, and the energy saving potential of the proposed air-conditioning system is analyzed by using a well validated building simulation code. The results indicate that the new system offers energy saving potential up to 80% under northwestern Chinese climate and up to 10% under southeastern Chinese climate. The optimal design method of the slurry storage tank is also proposed based on the slurry cooling storage behaviors and cooling demand variations of the ceiling panels. 相似文献
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直接蒸发冷却空调机性能研究 总被引:15,自引:0,他引:15
分析了影响直接蒸发冷却空调机性能的因素,然后对天然植物纤维填料式直接蒸发冷却空调机性能进行了实验研究并获得了相关性能曲线。研究结果表明,直接蒸发冷却空调机在我国西北干旱和半干旱地区降温加湿效果很好,完全可以达到舒适性要求,是一种节能的绿色空调;天然植物纤维填料阻力较大,但降温加湿效果更好。 相似文献
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A novel dew point evaporative cooling system for sensible cooling of the ventilation air for air conditioning application was constructed and experiments were carried out to investigate the outlet air conditions and the system effectiveness at different inlet air conditions (temperature, humidity and velocity) covering dry, temperate and humid climates. The results showed that wet bulb effectiveness ranged between 92 and 114% and the dew point effectiveness between 58 and 84%. A continuous operation of the system during a typical day of summer season in a hot and humid climate showed that wet bulb and dew point effectiveness were almost constant at about 102 and 76%, respectively. The experiment results were compared with some recent studies in literature. 相似文献
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Evaporative cooling has been proved as an effective method of storage of fruits and vegetables of moderate respiration rates. Therefore, a modified evaporative cooler named two-stage evaporative cooler (TSEC) has been developed to improve the efficiency of evaporative cooling for high humidity and low temperature air conditioning. Two-stage evaporative cooler consists of the heat exchanger and two evaporative cooling chambers. The performance of cooler has been evaluated in terms of temperature drop, efficiency of the evaporative cooling and effectiveness of TSEC over single evaporation. The temperature drop through TSEC ranged from 8 to 16 °C. With the several observations for diurnal runs, it was observed that TSEC could drop the temperature up to wet bulb depression of ambient air and provided the 90% relative humidity. Efficiency of single evaporation was 85–90%. Effectiveness of the two-stage evaporative cooling was found to be 1.1–1.2 over single evaporation. The two-stage evaporative cooler provided the room conditions as 17–25 °C temperature and 50–75% relative humidity, which can enable to enhance the shelf-life of wide range of fruit and vegetables of moderate respiration rates. 相似文献
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本文在温湿度独立控制的原理基础之上,根据西北地区的气候特点,提出了将干式风机盘管与蒸发冷却相结合的半集中式空调系统。该系统解决了目前蒸发冷却空调系统中存在的风管尺寸大、难以分室控制等问题。最后,结合工程实例对该系统的设计过程进行了分析,指出了使用蒸发冷却+干式风机盘管半集中式空调系统比直流式全新风系统节省能耗21.9%以上。 相似文献
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交通岗亭间接水蒸发开式空调系统 总被引:3,自引:0,他引:3
将间接式水蒸发空调系统用于交通岗亭中 ,分析了系统的热力参数 ,建立了系统的数学模型 ,分析一次气流进口相对湿度及换热器效率对系统加湿量的影响 ,并给出计算例子。 相似文献