无霜式溶液除湿温湿度分控空调系统性能研究

提出了一种新的无霜空气源热泵驱动的溶液除湿温湿度分控空调系统,通过MATLAB建立了系统数学模型,对系统冬夏季工况系统性能进行了研究.夏季工况下,除湿器进口溶液浓度、 再生流量比例、 冷凝热比分别为0.25、0.2、0.5时,系统COP可达最佳,COP值为2.34～5.23.与同类系统相比,其COPR值均大于1,系统性能优势明显.在冬季结霜区域内,室外空气经除湿后的空气露点温度比除湿前降低4.29～5.29℃,可实现"无霜"运行.     

溶液除湿技术蒸发冷却空调系统探讨

本文介绍了溶液除湿与蒸发冷却技术相结合的蒸发冷却新风空调集成系统,氯化锂溶液作为除湿溶液。并详细介绍了其流程,探讨了这一系统特性以及调节方法。以南京夏季室外环境为例,进行实例计算。研究表明,该系统的COP可达0.92,具有良好的发展潜力与应用价值。     

溶液除湿空调新风机组冬季工况性能研究

提出了一种由溶液除湿新风机组和空气源热泵装置组合的新系统,利用MATLAB语言对该系统进行数值模拟计算和分析,结果表明:在西安地区冬季空调室外计算参数下,新风机组性能系数COP,TCOP和COPh分别为0.5,0.65和5.1。     

溶液除湿空调在档案库房中的应用

本文首先对档案库房所需要的环境进行了分析,指出档案库房除了要满足基本的温度和湿度要求外,还必须有一定的洁净度、空气酸度和霉菌量的要求。而后剖析了常规冷凝除湿空气处理机组在档案库房空调应用中的弊端,研究提出了适应于档案库房的基于温、湿度独立控制技术的溶液除湿空气处理技术。最后通过对常规空调与溶液除湿空调的能耗分析,得出溶液除湿空调与常规空调相比可显著节能的结论。     

溶液除湿式空气处理机组在锂电池生产厂房中的应用

溶液除湿空调可以实现温湿度独立控制,具有避免再热、高能效、送风洁净度高等优势.溶液除湿空调在工业场景中应用节能效果显著,但相关研究较少.实测了溶液除湿空调系统在某锂电池生产厂房中应用的运行效果.结果表明:夏季工况下,当送风含湿量为5.3～5.8 g/kg时,系统的COP可以达到3.1～3.3;相较于转轮除湿空调系统的升...     

舒适性空调系统不同除湿方式的经济性分析

结合实际工程项目,对空调系统空气处理过程采用冷凝除湿和溶液除湿方式的优缺点及所需要的能耗进行了简要分析,得出空调系统采用溶液除湿具有显著的节能效果,同时还可以提高室内空气品质。     

溶液除湿空调及热湿独立处理空调系统

综合比较各种除湿方式，得出溶液除湿是实现湿度独立处理的较为可行的方式。对溶液除湿空调的溶液除湿过程和再生过程进行了分析，提出采用分级和热回收的方法提高其效率，并通过模拟计算，得出其夏季工况下的能效比为1～3。介绍了基于溶液除湿的热湿独立处理空调系统的构成及其能源利用率高且可用低品位热源驱动等优点，比较了这种系统和传统冷凝除湿空调系统的运行经济性。     

基于PV/T和GHP再生的除湿转轮空调系统的仿真研究

本文建立了基于PV/T和GHP再生的转轮除湿空调系统,构建了除湿转轮子系统仿真模块、燃气热泵子系统仿真模块和PV/T子系统仿真模块,并在此基础之上构建整机系统仿真模块。对不同处理空气流量、处理空气温度、处理空气湿度、转轮转速、太阳光照、发动机转速及有无预冷器的空调系统性能进行了仿真模拟。主要结论有:处理空气风量越大、入口温度越高、入口湿度越小、转轮转速越低则空调系统的除湿量越小;处理空气风量越大、入口温度越高、入口湿度越大、转轮转速越高,则蒸发温度越高,制冷COP越大;发动机转速越大,系统的再生温度越高、送风温度越低、冷凝温度越高、蒸发温度越高、除湿量越大;太阳光照强度越强,系统的除湿量就越大;有预冷器的空调系统除湿量更大。     

夏热冬暖地区溶液除湿独立新风空调系统的运用实验研究

建立溶液除湿独立新风空调系统的实验装置,实现温湿度独立控制的空调系统,对实验装置所采用的集热泵、溶液全热回收和溶液除湿技术于一体的新风处理机的工作原理进行分析,由此建立了溶液除湿独立新风空调系统的实际工程模拟实验系统。对受控对象的空调房间进行溶液除湿新风空调系统的工作特性测试。通过对测试工况数据的分析,得知室外新风温度与所要求的除湿溶液的入口温度、密度存在一定的线形关系。通过测试广州地区某典型工况下除湿新风机组温度、含湿量的运行参数变化,表明夏季完全能满足设计工况下的室内设计参数温湿度的要求。同时此溶液除湿独立新风空调机组的节能效果明显,EER值在5．0-60之间。     

太阳能驱动溶液除湿空调系统在低纬度孤立岛礁应用的优化匹配研究

针对低纬度孤立岛礁高温、高湿、强辐射气候和常规能源供应困难的特殊条件,将太阳能发电与溶液除湿空调相结合,介绍了该组合系统的空气处理流程和原理,建立了太阳能集热子系统和光伏发电子系统的数学模型。将该系统与常规冷却除湿空调系统在不同新风负荷比例及湿负荷比例下的耗冷量进行了比较分析。结果表明:溶液除湿空调系统比常规冷却除湿空调系统节能60%以上;当建筑湿负荷占总负荷的30%时,每处理100kW冷负荷所需集热器面积约130m~2,光伏板面积约171m~2,且湿负荷比例越大,所需除湿机组规模和集热器面积越大,室内末端和独立光伏系统规模越小,总体节能效果越明显。     

溶液调湿型空调系统在某博物馆建筑中的应用及节能分析

本文介绍溶液调湿空调技术在博物馆建筑中的应用。通过比较分析得出,溶液调湿空调技术用于博物馆建筑,在空气质量及能耗方面均具有优势。     

南海意库3#办公楼温湿度独立控制空调系统实测与分析

测试了温湿度独立控制空调系统主要设备的性能。结果显示,溶液除湿新风机组的平均COP为5.4,高温冷水机组的平均COP为8.9,水系统EER为5.1,典型房间室内空气参数均满足设计要求,室内空气露点温度低于冷水供水温度,干盘管处无凝水产生。空调系统单位面积年电耗为34.3kWh/m2,约为深圳甲级办公楼平均空调用电水平的69.3%。     

Performance analysis of liquid desiccant based air-conditioning system under variable fresh air ratios

In conventional air-conditioning system, fresh air volume is always restricted to save energy, which sacrifices indoor air quality (IAQ) to some extent. However, removing the latent load of air by liquid desiccant rather than by cooling is an alternative way of reducing energy consumption. Therefore, IAQ can be improved by increasing the volume of fresh air introduced into an air-conditioning system. In this paper, a liquid desiccant based air-conditioning system is studied, with the system performance under various fresh air ratios analyzed using simulation tests. In addition, the proposed system and a conventional system are compared. In the proposed system, with the increase in fresh air ratio, the heating load for solution regeneration rises, the dehumidification efficiency increases and the regeneration efficiency drops. The coefficient of performance (COP) of the liquid desiccant based system decreases sharply when the fresh air ratio exceeds 60%. The results also show that the proposed system can save power notably. The maximum power saving ratio is 58.9% when the fresh air ratio is 20%; however, the ratio drops when the fresh air ratio increases. These findings will be beneficial in the selection of fresh air ventilation strategies for liquid desiccant based air-conditioning systems.     

热泵驱动的双级溶液调湿新风机组原理及性能测试

介绍了一种新型热泵驱动的双级溶液调湿新风机组的工作原理和全年运行方式,重点介绍和分析了该机组主要部件的实测性能数据.测试结果表明,双级溶液全热回收单元的全热回收效率和潜热回收效率分别为55%左右,而新风机组在满负荷工况下整机COP为5.0,部分负荷下可超过5.9,其中的热泵制冷系统在满负荷工况下COP为4.01,部分负荷下可超过5.72,溶液热回收板式换热器的显热回收效率在80%以上.测试分析了机组进行新风处理的整体性能,指出了在再生单元补水的重要性.     

溶液调湿技术在既有建筑空调系统改造中的应用

针对既有建筑空调系统改造中存在的问题,提出采用溶液调湿空调系统的改造方案,以达到降低改造难度,保证改造后空调系统节能、舒适的目的.以某大型三甲医院综合服务楼为例,对其空调效果不佳的现象进行了测试分析,对溶液调湿空调改造方案和传统改造方案进行了分析比较,指出了溶液调湿空调在既有建筑改造中应用的可行性和优势.     

Comparative study on internally heated and adiabatic regenerators in liquid desiccant air conditioning system

Liquid desiccant regeneration has important effect on performance of a liquid desiccant air conditioning system. Compared with conventional packed regenerator, internally heated regenerator is proposed to achieve better regeneration performance. This study emphasized on both regeneration rate and regeneration thermal efficiency to evaluate the performance of both regenerators. A validated heat and mass transfer model was used to analyse and compare the performance of internally heated and adiabatic regenerators. The results indicated that internally heated regenerator not only could increase the regenerate rate, but also could exhibit higher energy utilization efficiency. Different from adiabatic regenerator, internally heated regenerator can provide comparable regeneration efficiency and regeneration rate at low desiccant flow rate, so it should be a good alternative to avoid carryover of desiccant droplets. Higher air flow rate would result in a deduction of regeneration thermal efficiency although achieving higher regeneration rate. Suitable flow rate of the air should be considered carefully in liquid desiccant regeneration. The internally regenerator could have considerable prospect in liquid desiccant air conditioning application.     

Study on a novel thermally driven air conditioning system with desiccant dehumidification and regenerative evaporative cooling

Existing desiccant cooling systems reduce the temperature of process air either by adopting evaporative coolers or incorporating vapor compression systems. While the former is restricted by inaccurate control, the latter still consumes certain quantity of electric power. To solve this problem, a thermally driven air conditioning system, which combines the technologies of rotary desiccant dehumidification and regenerative evaporative cooling, has been proposed and investigated. In addition to dehumidification, the system is capable of producing chilled water, thereby realizing separate temperature and humidity control without increasing electrical load. To find out the characteristics of produced chilled water and evaluate the feasibility and energy saving potential of this novel system, a mathematical model has been developed. Case studies have been conducted under Air conditioning and Refrigeration Institute (ARI) summer, ARI humid and Shanghai summer conditions. It is found that the system can achieve a thermal COP higher than 1.0 and an electric COP about 8.0. The temperature of chilled water produced by the system is around 14–20 °C. This chilled water can be used with capillary tube mats for radiant cooling. It is suggested that the system can also be designed as a standalone chilled water plant. As a desiccant dehumidification-based chilled water producing technology, this would expand desiccant cooling to a boarder niche application. The effects of chilled water flow rate, air distribution ratio, inlet air conditions and regeneration temperature have been analyzed in detail. Reachable handling regions, which will be helpful to system design and optimization, have been obtained.     

融冰过冷二氧化碳空调循环高压参数分析

常规跨临界二氧化碳空调循环的性能系数对气体冷却器出口工质温度十分敏感，该温度越低，同等条件下性能越好。为了提高制冷量和性能系数，在常规循环基础上引入了融冰过冷器以大幅度降低气体冷却器出口工质温度。基于压缩机等熵效率实验数据对融冰过冷二氧化碳空调循环进行了计算，重点分析了循环高压对系统性能的影响。计算结果表明：引入融冰过冷能大幅度提高系统性能系数，并且在循环高压较低时更为明显。在典型的应用范围内，融冰过冷循环不存在使性能系数最大的优化高压。当其他参数一定时，高压越高，性能系数越低。与常规无融冰过冷循环不同，中间换热器的引入不利于性能系数的提高，因此在进行多运行模式的实际系统设计时应予折中考虑。本文的分析结果可为实际系统设计和运行提供指导。     

液体除湿空调系统除湿剂再生性能影响因素

液体除湿空调系统中,除湿剂再生过程的效率和稳定性决定空调系统运行效率和稳定性.探讨了液气比、除湿剂喷淋温度、除湿剂的溶质质量分数及再生空气状态对除湿剂再生性能的影响.