液体除湿空调除湿性能影响分析

以液体除湿空调系统为实验对象,改变系统中除湿器入口空气及溶液的参数,得出空气出口温、湿度随之变化的状况.与理论模拟计算值比较,发现实验值和理论值有相同的变化趋势.由此得出各入口参数中,溶液的温度和流量的变化对空气出口温、湿度影响较大,空气的出口温度实验值偏小于理论值,空气的出口湿度实验值偏大于理论值.这将对液体除湿空调系统的性能分析和设计提供帮助.     

溶液除湿空调系统在工业厂房应用的能耗分析

通过对深圳某工业厂房分别选用常规冷凝除湿空调系统和溶液除湿空调系统进行系统设计和理论计算分析,比较了两类空调系统的能耗及COP。在夏季室外设计工况下,常规冷凝除湿空调系统的COP为2.94,溶液除湿空调系统的COP为5.42。室外空气含湿量越小,对提高溶液除湿系统的性能越有利。溶液除湿空调系统在节能方面具有较大的优势。     

制作温湿度曲线图表为调控库房温湿度提供依据

为了延长档案“寿命”或者说延缓档案自然损坏的时间,采取有效措施达到控制档案库房温湿度的目的,本文阐述了如何制作档案库房温湿度曲线图表,意在避免档案工作人员每天记载库房内温湿度,减轻劳动强度,优质高效地做好档案库房的温湿度控制。     

资料档案库房的防排烟设计探讨

一、资料档案库房防烟设计的重要性及其作用资料档案库房可分为地上库房和地下库房两类,并根据其档案库房存放资料档案的级别和使用单位范围的不同分为特级、甲级、乙级和丙级。地上库房根据档案资料防护要求一般很少开或不开外窗,而地下库房     

溶液调湿空气处理技术的研究进展

综述了溶液调湿空气处理技术的发展历史。重点介绍了溶液调湿空气处理技术的研究现状,特别是针对各种实际应用场合的特殊需求提出了各种新的处理流程,如全空气空调环境、无排风可利用的洁净空调环境及要求极低湿度的深度除湿环境等,指出了以后的发展趋势。为研究和设计人员了解溶液调湿空气处理技术的发展历史和研究现状,以及为设计人员针对不同环境控制需求选择合适的除湿技术提供参考。     

溶液除湿空调系列文章溶液式空调及其应用

分析了目前空调系统面临的主要问题，提出了基于溶液除湿空气处理方式的解决方案。介绍了溶液除湿空气处理方式的原理和系统构成方式，从改善室内空气质量、改进空调末端装置方式、节省能源、改善城市能源结构等方面讨论了这一方式的优点和特点。分析表明，基于溶液除湿空气处理方式的湿度独立控制空调系统可有效消除空气的霉菌、粉尘，可以根据人员数量调节新风量，并通过独立的吸收或提供显热的末端装置调节温度，实现室内温湿度的分别控制。溶液除湿空气处理方式还可有效地对排风进行全热回收，并在过渡季利用干燥或低温的新风，从而降低空气处理能耗。由于冷水不承担除湿任务，因此只需要18—21℃冷水用于吸收除湿过程释放的热量和室内显热。这就有可能利用各种自然冷源或采用高GOP的冷水机组。溶液除湿方式还可实现高密度的能量蓄存，从而协调各种能源供应中的负荷匹配。     

高压细水雾灭火系统在档案库的灭火试验研究

细水雾灭火系统已被建议用于保护对水敏感的区域,如档案库房。通过试验研究了细水雾灭火系统控制与扑灭档案库房火灾的可能性,并比较不同喷头形式的细水雾灭火系统在扑救档案库房火灾中的局限性,为细水雾灭火系统在档案库房内的推广应用提供建议。     

档案馆库房建筑设计——以罗源县档案馆库房建筑设计为实例

档案馆库房是保障档案安全的重要屏障,可以确保为人民群众提供宝贵的档案资源,合理利用档案资料,档案库房建筑设计必须以保护档案为基础。本文首先介绍了档案馆库房建筑设计的原则,然后对档案馆库房建筑设计要点进行了分析,并以罗源县档案馆库房建筑设计为研究实例,详细探究了档案馆库房建筑设计方法。     

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。     

库房管理与档案保护

档案库房作为档案馆的主要组成部分,它的作用是贮藏和保护档案,因此,档案库房管理的好坏直接影响到档案使用寿命的长短。那么,如何更好的保护档案,笔者认为:加强档案库房管理是保护档案的重要途径。     

蒸发冷却与溶液除湿复合空调系统的应用

根据长江流域高温高湿的气候条件,构建了两级蒸发冷却与溶液除湿相结合的复合空调系统。介绍了复合空调系统的流程,根据该地区的气候条件和相关的空调设计参数,比较了复合空调系统与一次回风空调系统的能耗。在设计工况下,复合空调系统的能效比为2.6,相比于一次回风空调系统的节能率为47.2%。     

溶液调湿技术在昆明南站的应用

分析了昆明南站的溶液调湿通风系统,通过通风满足室内温度要求,通过溶液调湿系统满足室内湿度要求,并对溶液调湿通风系统进行数值模拟和运行工况分析。     

Achievable working range for solid all-desiccant air-conditioning systems under specific space comfort requirements

Solid desiccant air-conditioning systems present a promising solution, in terms of performance level and environmental protection, pointing out their potential to be coupled with thermal solar or waste heat energy source. Nevertheless, these systems are characterized by constraints to the load they can satisfy, through the trade-off between the dehumidification cooling capacity and the latent load of the conditioned space. On that level, one has to note that, for steady environmental conditions, the conditioned space does not present unique value of load, but range of load, corresponding to an array of acceptable temperature and (usually relative) humidity values. In this work a methodology is proposed for the definition of the system's achievable working range under specific set of space (comfort) requirements. Through this approach, the systems present greater potential for covering the space requirements, thus presenting more possibilities on a design basis, and more flexible control strategies, as well. The proposed methodology is presented and discussed through the case study of a solar desiccant air-conditioning system coupled to a typical residential building.     

In situ performance of independent humidity control air-conditioning system driven by heat pumps

A liquid desiccant based independent humidity control (IHC) air-conditioning system driven by heat pumps is presented in this paper. The system consists of a liquid desiccant fresh air processor and a high-temperature chilled water system. The operating principles of the fresh air processor and the whole system are presented in detail. Based on the in situ system installed in an ecological building of Shanghai Research Institute of Building Sciences (SRIBS), a performance investigation was performed in summer, 2007. The measurement results show that (1) the indoor temperature and humidity both are in the specified range; (2) the supply water temperature of the high-temperature refrigerator is higher than the corresponding indoor air dew point temperature, so no condensed water would be formed on the fan-coil unit (FCU) surface; and (3) the average coefficients of performances (COPs) of the fresh air processor and the high-temperature refrigerator are 6.24 and 4.38, respectively, and the average COP of the whole IHC system is 5.28.     

Modeling and simulation of desiccant wheel for air conditioning

This paper presents the modeling of a desiccant wheel used for dehumidifying the ventilation air of an air-conditioning system. The simulation of the combined heat and mass transfer processes that occur in a solid desiccant wheel is carried out with MATLAB Simulink. Using the numerical method, the performance of an adiabatic rotary dehumidifier is parametrically studied, and the optimal rotational speed is determined by examining the outlet adsorption-side humidity profiles. The solutions of the simulation at different conditions used in air dehumidifier have been investigated according to the previous published studies. The model is validated through comparison the simulated results with the published actual values of an experimental work. This method is useful to study and modelling of solid desiccant dehumidification and cooling system. The modeling solutions are used to develop simple correlations for the outlet air conditions of humidity and temperature of air through the wheel as a function of the physically measurable input variables. These correlations will be used to simulate the desiccant cooling cycle in an HVAC system in order to define the year round efficiency.     

Performance comparison between two novel configurations of liquid desiccant air-conditioning system

This paper is concerned with performance investigation and comparison between two novel configurations (type A and type B) of liquid desiccant air-conditioning system driven by low grade thermal energies. Both of these configurations, compared with other liquid desiccant systems, may have some outstanding advantages: leading to improved indoor air qualities, possessing a compact structure and making the best use of space exhaust air to cool the process air. Computer simulation is performed to analyze the cycle performance of these two system configurations under the effect of five key variables. Simulation results show that type B configuration is superior when the supply air temperature and humidity ratio are required to be relatively low or the ambient air absolute humidity is relatively high. In contrast, system of type A configuration has higher performance under the lower ambient air absolute humidity conditions. For a typical hot and humid summer day of Zhuhai, a city of Guangdong Province in southern China, the supply air temperature of type B configuration is more stable.     

溶液除湿温湿度独立控制空调系统设计

该文叙述了溶液除湿温湿度独立控制空调系统的构成和溶液调湿技术,并针对各种实际场合提出了相应的系统形式。同时,详细介绍了温湿度独立控制空调系统的设计方法以及注意事项,为设计师进行温湿度独立控制空调系统设计提供一定的指导。     

A new heat pump desiccant dehumidifier for supermarket application

Recently a new equipment for dehumidification was put onto the market. It is a self-regenerating liquid desiccant cooling system able to dehumidify, heating or cooling the ambient air by an electric heat pump that is a part of the equipment. Its operation is here studied in a supermarket application where air temperature and relative humidity play a very important role and the air-conditioning becomes necessary not only to assure a suitable thermal comfort, but also to make the refrigerated display cabinets operate properly. In this paper possible energy savings, compared to a traditional mechanical dehumidification, are evaluated by means of a numerical model that simulates a typical Italian supermarket.     

某高压电机装配车间环境控制的实测分析与研究

通过对某高压电机装配车间进行实测,研究了空调风量对恒温恒湿车间工作区空气温湿度均匀性的影响;并与对空调冷负荷的分析相结合,进一步明确影响室内空气湿度最重要的因素是新风,影响室内空气温度最重要的因素是厂房内的工艺设备的散热量;根据高压电机生产车间的低湿环境要求,综合考虑技术性和经济性,对空调湿负荷的处理方式进行了优化研究,提出冷却除湿+转轮除湿复合除湿系统是能够达到此要求的最优化方法.     

转轮除湿与单元式空调机相结合的空气处理系统

本文介绍了转轮除湿与直接膨胀式单元机组相结合的复合空调系统的2种紧凑型组成形式:前置预冷与后置冷却,并在几种不同室外工况下,针对应用于独立新风系统,对比分析了这2种典型组成方案的性能特点。结果表明,这2种除湿方式在4种典型工况下的制冷能耗相差不明显,在10%以内;但后置冷却除湿在高温高湿工况下难以实现较大的单位除湿量,且再生空气温度高;而前置预冷除湿系统采用较小的除湿转轮尺寸,结构更紧凑,可明显降低初投资,且再生空气温度较低。因此,前置预冷除湿系统在较小流量空气处理应用方面更具优势,更具商品化发展潜力。