榆林地区大中型商场蒸发冷却空调系统设计分析

以榆林某大型商场为例,对该商场使用蒸发冷却空调系统的设计方法进行研究,对蒸发冷却空调与传统机械制冷空调的优缺点进行对比,给出了具体的空调送风量数值、空调末端的送回风形式确定以及空调机房的设备布置和配管方式;并将适用于高温空调的层式通风方式与蒸发冷却空调系统结合,希望能够促进蒸发冷却在榆林乃至西北地区的推广应用。     

再循环蒸发冷却技术及其在空调行业的应用探讨

文章提出了一种再循环蒸发冷却流程，根据此流程设计了一套再循环蒸发冷却装置，并计算分析了它的冷却效果。对再循环蒸发冷却技术在空调行业的应用进行了探讨，提出了相应的系统应用方法。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。     

蒸发冷却空调技术在住宅建筑中的研究进展

介绍蒸发冷却空调技术在住宅领域的研究进展。主要包括:直接蒸发冷却空调技术在住宅建筑的应用、间接蒸发冷却在住宅建筑的应用以及蒸发冷却与其他技术相结合在住宅建筑领域的应用几个部分。参考国内外相关文献及其专利,得出蒸发冷却空调技术在部分地区住宅领域应用效果较好的结论,特别是将蒸发冷却空调技术与其他技术相结合的应用过程中,这项技术能够提高整个机组的运行能效比,使机组运行更加节能、环保。在广阔的农村住宅领域以及"干空气能"丰富的部分地区,蒸发冷却空调技术值得被大力推广。     

从南迪普电厂实例谈直接蒸发冷却空调的影响因素及应用

从巴基斯坦南迪普电厂直接蒸发冷却空调实际使用效果同设计结果有较大差异入手,分析了存在差异的原因,进而提出了直接蒸发冷却空调可能的优化措施,并展望了直接蒸发冷却空调的应用前景。     

适用于夏热冬冷地区的空调节能系统

介绍几种空调系统节能措施,并根据夏热冬冷地区气候条件,提出该地区空调系统节能的总体构想,即利用蒸发冷却、除湿机和机械冷却相结合,以达到空调系统节能的效果.     

蒸发冷却空调地铁站应用的可行性分析

对地铁站的空调通风特点及建筑环境状况进行了分析总结,得出我国现行地铁站空调通风系统耗能大、空气品质不佳等问题,通过对我国现行地铁站空调通风系统的现状与蒸发冷却空调自身特性以及国外此方面实际应用效果的比较得出,若将蒸发冷却这种节能、环保的空调应用于干燥、中湿度地区的地铁站(湿度地区辅助应用),可以较好地解决现行地铁站空调...     

蒸发冷却技术在空调节能中的应用

介绍了近年来国内外对蒸发冷却技术的研究状况,分析了蒸发冷却技术应用在空调中的各种形式和节能效果。指出,蒸发冷却技术在我国东部地区和西部地区均有着广阔的应用前景。     

高湿度地区某整理车间蒸发冷却空调系统设计分析

江阴市某纺织品整理车间设计空调系统,对车间进行降温,改善工人工作环境。针对达到规范所要求的室内温湿度和适当放宽室内温湿度(在人体舒适区域内)时,提出蒸发冷却与机械制冷相结合的空调方案及蒸发冷却空调方案,并根据各自方案的特点、风量及制冷量等情况,得出应用蒸发冷却空调的可行性,最后根据此车间的特点,对方案进行优化,使得蒸发冷却与工位送风相结合,初投资和运行费用更低、节能效果更加显著。     

多级蒸发冷却在化工厂变频器室通风降温的应用

介绍传统变频器室的降温方式以及多级蒸发冷却技术的特点,并以贵州福泉某变频器室为例,进行多级蒸发冷却通风降温设计,通过与传统机械全面通风降温及单元式空调柜机降温方案进行比选,可以得出多级蒸发冷却通风降温系统在节能方面和运行投资方面均具有很大的优势,为该系统在贵州地区的应用提供技术参考.     

蒸发冷却空调在水力发电厂的应用

1蒸发冷却空调的基本原理 蒸发冷却是一种利用水蒸发吸热现象来降温制冷的技术。只要存在不饱和空气,水就会不断地蒸发,水温就会趋近湿球温度。在不考虑气压变化的前提下,分为两种情况：     

大学生公寓多联机及半集中式空调系统能耗分析

选择安徽某大学生公寓作为研究对象,根据工程实际规模,分别配置半集中式空调系统和多联机式空调系统,分析影响空调系统运行能耗的各种因素,对两种系统的实际运行情况进行分析对比.结果表明:和半集中式空调系统比较,多联机式空调系统在相同条件下约节能30%.     

Performance evaluation of a solar-powered flat-plate multichannel liquid desiccant air conditioning system

There has been a limited application of liquid desiccant (LD) dehumidification systems in space air conditioning until now. The key elements responsible for this restricted implementation are leakage of desiccant solution, corrosion of components, and solution carryover along with the processed air to the space to be conditioned. To remove these problems, an evacuated tube solar heat collector-driven multichannel liquid desiccant air conditioning system has been proposed and experimentally investigated. In this study, dehumidification and regeneration rate, their effectiveness, cooling effect of the dehumidifier, and indirect evaporative cooling unit have been analyzed. The results obtained indicate that the process air has been dehumidified and cooled by 6.32 g kg⁻¹ and 5.26°C, respectively. The regeneration rate and effectiveness have been obtained to be 0.26 g s⁻¹ and 0.31, respectively. In terms of the cooling effect, the system output of 0.703 and 0.130 kW has been obtained from the dehumidifier and indirect evaporative cooling unit of the system, respectively. The proposed system validates the possibility of the novel solar-powered liquid desiccant air conditioning system concept and provides growth and development of the LD air conditioning technology for space air conditioning.     

Use of liquid desiccant cooling to improve the performance of vapor compression air conditioning

A hybrid air conditioning system, which consists of sections of desiccant dehumidification, evaporative cooling and vapor compression air conditioning, has been established in this paper. Experimental investigation demonstrates that cooling production and COP of the new hybrid system can be increased significantly, if they are compared with those of vapor compression system (VCS) alone. Assuming that the outlet temperature and humidity of the system are constant, psychrometric analysis at ARI conditions has been conducted under three different cases. The benefits are represented by lower electricity consumption of the compressor, higher COP of the system, less flow rate of condensation air, and reduced size of VCS, etc. The reason that the hybrid system is superior in performance to conventional systems lies in that desiccant dehumidification and evaporative cooling changes the inlet states of the air entering into VCS. Furthermore, the effects of dehumidification and evaporative cooling are analyzed in the paper.     

家用蒸发冷却中央空调的应用研究

针对现有三种技术路线的家用中央空调缺点。结合国情,提出了利用蒸发冷却技术和变风量技术实施分室控制的家用蒸发冷却变风量中央空调的方案。     

复合式太阳能空调优化方案

出了融除湿、蒸发冷却、压缩制冷及太阳能热水为一体的复合式太阳能空调的优化方案。分析比较了三种空气处理方案。结果表明 ,与常规空调相比 ,优化方案节电近 4 7%。     

Advanced solar assisted desiccant and evaporative cooling system equipped with wet heat exchangers

This work concerns an innovative solar assisted desiccant and evaporative cooling (DEC) system for building air conditioning. In this system, air-to-air packaged wet heat exchangers are used to maximize the exploitation of the evaporative cooling potential associated with the exhaust air stream.The thermodynamic cycle is first theoretically described, and then an example of a real application is shown.The system presented is an experimental DEC system originally installed at the beginning of 2008 at the Solar Laboratory of the University of Palermo and recently modified and updated. These modifications have been implemented with the aim to foster some problems related to the conventional indirect evaporative process and to increase the overall performance of the process.Different energy performance figures, such as thermal and electrical COP, are presented and discussed.The obtained results are very positive, showing that DEC systems can benefit from the use of wet heat exchangers to efficiently cool the air stream after the adsorption process in the desiccant wheel without any change in moisture content.     

Novel design and modelling of an evaporative cooling system for buildings

Passive evaporative cooling has great potential as an alternative to conventional air‐conditioning in arid hot climates because of its low cost and zero pollution. This paper describes a novel evaporative cooling system with an automatic wind‐tracking device to improve its operating efficiency. The design and operating principles are discussed. A mathematical model is simplified by the assumption of convective heat and mass transfer of staggered streamlets of water. A computer program has been developed to calculate the deflection and length of spray water streamlets, as well as evaporative water mass, minimum cooled water temperature and required cooling time. A typical example illustrates that approximately 20 kg water are evaporated and around 26 min are required for 980 kg of water to be cooled from 28°C to the wet bulb temperature of 19.2°C of ambient air in a typical arid hot climate (relative humidity = 0.30, dry bulb temperature = 32°C and wind velocity = 4 m s^?1). The application of adsorbents, would allow the evaporative cooling system to be applied in hot, humid climates, in addition to hot climates with low humidity. Copyright © 2006 John Wiley & Sons, Ltd.