水雾雾滴粒径的分析与研究

介绍了水雾雾滴粒径的不同表征参数以及雾滴粒径的不同测量方法,并通过试验对水雾喷头以及细水雾喷头的雾滴粒径进行了测量,对通过雾滴直径这一参数如何区分描述水雾喷头和细水雾喷头的雾滴特性提出了相应的建议。     

高压单相细水雾灭火技术研究进展

介绍了细水雾灭火技术的特点和高压单相细水雾灭火系统的构成及主要特征,分析归纳了发展细水雾灭火技术及高压单相细水雾灭火技术需要解决的关键技术,概述了国内外的最新研究进展和应用。     

某车间蒸发冷却通风降温系统的设计及运行测试

介绍了蒸发冷却降温技术在某工厂空冷配电室的应用,对其系统运行情况进行了测试分析,结果表明在干燥地区采用直接蒸发冷却通风降温方式消除工业余热可以满足生产需求.     

细水雾灭火系统在热处理车间的应用

简要介绍了细水雾灭火系统的特点,并对其进行了分类,从油槽发生火灾的原因、灭火设施的选择等方面对细水雾灭火系统在热处理车间的应用进行了较详细的论述,以推广细水雾灭火系统的广泛应用。     

保水性铺装材料的湿气特性及表面蒸发冷却效果实验研究

保水性铺装是一种能缓解城市热岛现象的有效方法。本文实验采用高吸水、保水性矿物质作为吸水材料,制成了新型吸水、保水材料。首先对该材料的吸水、保水及表面蒸发特性进行了测试,可知该材料具有很好的吸水及保水效果;而后,利用该矿物质和木屑作为吸水材料与速硬白水泥混合制成了2种保水性实验材料,并与纯速硬白水泥材料及普通沥青路面铺装材料进行表面蒸发冷却对比实验,结果显示,与沥青铺装材料相比,该矿物质材料具有很好的表面蒸发冷却效果。     

数据中心高压细水雾灭火系统设计分析

针对数据中心内不同安全等级机房的使用功能及防护要求,通过对高压细水雾灭火系统从系统选型、喷头设置及优化系统集成等方面进行探讨分析,提出了不同机房、设备用房及工作间的高压细水雾灭火系统设计方案,并设计了具体参数,在保证灭火有效性的基础上节约投资,提高了该系统设计的灵活性及有效性。     

封闭式水系统全年空调的构思与分析

提出了一种可使用水冷冷水机组同时实现夏季制冷和冬季供暖的集中空调系统冷热源方案,该机组夏季可利用水冷冷水机组制冷系数高的特点而冬季又能以热泵方式工作。初步分析表明在中南部地区其全年能耗低于空气源热泵机组。     

地铁高压细水雾系统与相关专业接口分析

根据已有的工程实例和相关国家规范规定,系统全面地对上海市地铁地下车站的高压细水雾系统的设计接口进行了总结和探讨,以期对其他城市相关地铁工程设计提供借鉴和参考。     

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。     

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.     

循环水和冷水系统的一种节能运行方式

对常规的循环水、冷水系统运行方式进行了比较分析,提出了在过渡季节冷却塔参与到冷水系统的运行方式可以降低运行费用的方法,通过实例的运行情况研究总结得出结论,该运行方式节能效果明显。     

Experimental study of cooling effects of a passive evaporative cooling wall constructed of porous ceramics with high water soaking-up ability

As a passive cooling strategy aimed at controlling increased surface temperatures and creating cooler urban environments in summer, the authors developed a passive evaporative cooling wall (PECW) constructed of porous ceramics. These ceramics possess a capillary force to soak water, which means that their vertical surface is wet up to a level higher than 100 cm when their lower end is placed in water. The present paper describes an experiment that clarifies the cooling effects of a prototype PECW constructed of pipe-shaped ceramics. The PECW is capable of absorbing water and allows wind penetration, thus reducing its surface temperature by means of water evaporation. Passive cooling effects such as solar shading, radiation cooling, and ventilation cooling can be enhanced by incorporating PECWs into the design of outdoor or semi-outdoor spaces in parks, pedestrian areas and residential courtyards. The following findings were understood from an experimental data collected over a summer period. Wet vertical surfaces of the ceramic pipe reached a height of over 1 m at an outdoor location exposed to solar radiation. Wet surface conditions can be maintained throughout successive sunny days during summer. A slight difference in the vertical surface temperatures of the ceramic pipe was found. The air passing through the PECW was cooled, and its temperature can be reduced to a minimum value by several degrees during summer daytime. It was also found that the surface temperature of the shaded ceramic pipe can be maintained at a temperature nearly equal to the wet-bulb temperature of outdoor air.     

高压细水雾对商场货架障碍火辐射热影响的研究

采用高压细水雾灭火系统,以障碍物较多的商场、超市火灾为研究对象,分析在存在障碍物遮挡的条件下火灾中产生辐射热的变化规律。相同燃烧方式下变换细水雾工作压力测量辐射热通量变化。实验结果表明:燃烧组件单侧敞开燃烧时产生的辐射热较全敞开时的辐射热强;细水雾控火效果明显,但将火焰熄灭需一定的时间;细水雾系统压力过大时雾滴直径小,容易蒸发或被吹散,难以达到燃烧物表面;细水雾系统压力太小雾滴速度不足,难以发挥作用。     

Innovative low-energy evaporative cooling system for buildings: study of the porous evaporator wall

To face the current increase of building cooling demand and the concerns related to climate changes, an energy-efficient evaporative cooling system using porous material has been developed. This article presents the innovative cooling system and a detailed hygrothermal analysis of its main element: the porous evaporator. A mathematical model and an experimental set-up are presented, which enable to determine the suitable material properties for the evaporator and its impact on the overall cooling system performance, focusing on the optimal use of both energy and water. A good agreement is observed between numerical and experimental results, and the evaporative cooling power is estimated from 12 to 72?W/m² of evaporator wall, depending on the evaporator characteristics. A parametric analysis is conducted to select the best material for the evaporative cooling system. An intrinsic permeability of the material of 4?×?10^?17?m² is recommended for this new cooling system.     

可燃液体火灾危险场所细水雾灭火系统的试验研究

针对可燃液体火灾危险场所中不同燃烧功率、火灾类型、障碍物特征、燃烧物质情况进行了细水雾灭火试验，给出了部分试验结果。针对试验数据进行分析总结，提出了火灾规模、空间通风率等是实体火灾试验中必须关注的问题，给出了细水雾系统在可燃液体火灾危险场所使用的基本要求。指出细水雾灭火系统按实体火灾试验规约进行产品检验的重要性，为今后我国细水雾灭火系统的研究和工程应用提供借鉴。     

某黑色金属熔炼炉循环冷却水系统设计

介绍了某特殊行业废旧污染黑色金属熔炼处理中心的中频无心感应熔炼炉循环冷却水系统设计,针对工程所在地的气候条件及水质等确定循环冷却水系统的工艺流程、运行控制方式,并结合现场实际运行情况对运行及处理效果进行了评价和分析,得出了一些有参考价值的结论。     

利用电厂循环冷却水的暖通空调方案比选

通过北京地区的工程实例,对4种暖通空调方案的初投资、运行费用、能源利用效率、污染排放量进行了分析比较。认为在具备利用电厂循环冷却水条件的场所,采用水源热泵为建筑供暖可以减少初投资、运行费用以及对城市的污染影响。     

浅谈高压细水雾灭火系统在档案馆等重要场所的应用推广

本文结合高压细水雾灭火系统在福建省档案馆新馆工程的的应用实例,通过与气体灭火系统、超细干粉灭火系统的经济效益、安全性、灭火系统特征等方面进行比较分析,阐述高压细水雾灭火系统在档案馆等对资料、设备保护要求较高场所应用推广的必要性。     

钢铁工业冷却水水源热泵的技术应用分析

钢铁工业的冷却水含有大量的低温热量,可以通过水源热泵利用这部分热量实现区域供热。介绍了一些钢铁工业冷却水水源热泵的应用情况,分析了工业冷却水水源热泵的运行费用和投资费用及提高供水温度和制热效率的方法。     

Cities under Siege: Urban Planning and the Threat of Infectious Disease

Many analysts argue that the potential for a natural, accidental, or nefarious infectious disease event to have a dramatic impact on urban areas in the United States and abroad is growing. After reviewing the justification for this position, this article considers what cities should do to prepare for a major disease event. Recognizing that prevention and preparation receive insufficient attention, we recommend that planners seek out and work with both public and private sector groups with roles in disaster planning; design land and transportation planning information systems to aid and support decision makers during crises; encourage greater self-sufficiency in food production and consumption; assist in the design of humane, realistic evacuation strategies and routes; and consider the effects of their day-to-day recommendations on disease risk and response.