冰蓄冷低温送风空调系统探析

1 低温送风系统 在常规全空气空调系统中,送风温差一般控制在8～10℃,送风温度在15～1 8℃范围,如果系统有再热,则盘管出口空气温度可低到12℃左右;而在冰蓄冷系统中,利用低温冷冻水,可将盘管出口空气温度降到4～6℃,送风温差可达20℃左右,形成"低温送风系统".     

冰蓄冷空调技术研究实验室的开发建设

该实验室具有实际工程规模，包括五个系统：冰蓄冷、电蓄热机房系统，低温送风VAV空调末端性能测试系统，风机盘管及VAV空调机组热工测试系统，低温送风空调系统和常规空调系统。重点介绍了实验室机房系统的功能、组成和流程原理，以及储冰测试设备的蓄冰、融冰测试方案、测试流程和使用的数学模型。     

中国石油大厦空调工程设计

介绍了中国石油大厦的工程概况,对双层内呼吸式玻璃幕墙的特性、中庭及相邻办公室的空调负荷计算、低温送风的室内气流组织与热舒适性等进行了数值计算与分析.简要介绍了外融冰式冰盘管蓄冰系统及其采用的技术:双蒸发器离心式制冷机、磁悬浮离心式制冷机及外融冰式蓄冰盘管.阐述了低温送风空调系统的设计.     

低温送风系统空调器的选用及机房布置

介绍了低温送风系统设计参数的确定、冷却盘管的选用、空气温升及冷负荷的计算、过滤器的选择、机外静压的确定、空调机房的布置要求、机房内风管的绝热要求,等。     

10～15℃低温空调系统设计

本文讨论了10～15℃低温空调系统设计中关于系统形式的选择,风量和送风温差的确定,空气冷却器和风机盘管等问题。并给出了两种设计方案的低温空调系统的设计实例。     

北方地区某新风能量回收系统用户风机盘管冻裂原因分析

分析了该住户风机盘管在供暖初期冻裂的原因——空气-空气能量回收系统新风送风温度低于0℃,指出为防止送风温度过低导致盘管冻裂,应避免在住宅供暖设计中采用将新风直接送入热水盘管再热的方式。     

风机盘管加新风空调系统的分析研究

针对目前暖通设计人员对风机盘管加新风系统中，新风处理方式和送风方式容易出现的问题，分析研究了几种新风处理方式和送风方式，并指出各自方式的特点。     

低温送风末端的选择及其室内热舒适

本分析了低温空气的沉降机理，介绍了低温送风系统各种末端装置的特点，说明了低温送风系统中直接送风散流器的选择方法，并从送风参数的角度阐述了采用低温送风空调系统对室内热舒适的影响。     

冰蓄冷空调讲座之（3）──空调工程中的蓄冷技术──第三讲 与冰蓄冷相结合的低温送风空调系统

介绍了与冰蓄冷相结合的低温送风空调系统，回顾了低温进风的发展过程，分析了低温逆风系统的特点、低温逆风系统的室内环境及常用的末端送风装置，阐述了几种与冰蓄冷相结合的低温逆风系统型式和低温送风系统的几个特殊问题，并给出了几种方案比较的典型例子。指出了与冰蓄冷相结合的低温送风空调系统在我国的发展前景。     

内廊式建筑空调末端设计方案讨论

结合实际工程，指出传统的风机盘管加新风系统空调末端设计方案即单干管双侧供水送风存在的问题，提出了改进的双干管单侧供水送风方案。     

Investigation of a hybrid system of nocturnal radiative cooling and direct evaporative cooling

In this paper, the results of a study on a hybrid system of nocturnal radiative cooling, cooling coil, and direct evaporative cooling in Tehran have been discussed. During a night, the nocturnal radiative cooling provides required chilled water for a cooling coil unit. The cold water is stored in a storage tank. During eight working hours of the next day, hot outdoor air is pre-cooled by means of the cooling coil unit and then it enters a direct evaporative cooling unit. In this period, temperature variation of the conditioned air is investigated. This hybrid system complements direct evaporative cooling as if it consumes low energy to provide cold water and is able to fulfill the comfort condition whereas direct evaporative alone is not able to provide summer comfort condition. The results obtained demonstrate that overall effectiveness of hybrid system is more than 100%. Thus, this environmentally clean and energy efficient system can be considered as an alternative to the mechanical vapor compression systems.     

长三角地区某数据中心空调系统设计

介绍了长三角地区某数据中心空调冷源、空调水系统、空调风系统等的设计,并对机房的气流组织进行了CFD模拟和验证。该数据中心在空调冷源设计上采取了磁悬浮冷水机组、大温差高温供冷(18℃/28℃)、自然冷却及热通道封闭等措施,保证设计PUE<1.3。     

A two-stage system of nocturnal radiative and indirect evaporative cooling for conditions in Tehran

In this paper, the results of an investigation on a two-stage cooling system have been studied. This system consists of a nocturnal radiative unit, a cooling coil, and an indirect evaporative cooler. During the night in summer, requisite chilled water for a cooling coil unit is provided by nocturnal radiative cooling and is stored in a storage tank. During the next day, the water in the tank provides chilled water for the cooling coil unit and hot outdoor air passes through two-stages: the cooling coil unit and an indirect evaporative cooler. Three sources provide secondary air for the indirect evaporative cooler. The sources are outdoor air, the air leaving from the cooling coil, and the air leaving from the indirect stage (regenerative). The investigation has been conducted in weather conditions in the city Tehran. The results obtained demonstrate that the first stage of the system increases the effectiveness of the indirect evaporative cooler. Also, the regenerative model provides the best comfort conditions. Therefore, this environmentally friendly and energy-efficient system can be considered as an alternative to the mechanical vapor compression systems.     

福建省体育馆通风空调系统设计

介绍了福建省体育馆通风空调系统设计,包括空调冷负荷计算及冷源设置、空调气流组织和风系统、空调水系统、自控系统及防排烟系统等,并对设计中的一些经验和问题进行了总结。     

Energy savings potential of a desiccant assisted hybrid air source heat pump system for residential building in hot summer and cold winter zone in China

In hot summer and cold winter zone in China, air conditioning system has four running modes yearly including cooling with dehumidification, cooling, dehumidification and heating in residential buildings. The conventional air source heat pump (ASHP) system is not designed to independently control temperature and humidity, and is not very suitable for the dehumidification mode in the view of building energy consumption. A novel ASHP system combining radiant cooling/heating for residential buildings was presented. The main feature of this hybrid ASHP system is that desiccant wheel and cooling coil accomplish dehumidification process together, and the regenerative heat needed by the desiccant wheel is supplied by the condenser dissipated heat. Based on simulation studies and performance analysis, this paper predicts the primary energy consumption of the hybrid ASHP system in comparison with the conventional ASHP system during the cooling and heating seasons. It was found that primary energy requirement can be reduced by more than 8% in cooling with dehumidification mode, by 50% in dehumidification mode, and by more than 14% in heating mode. The study results prove that the hybrid ASHP system can keep great energy saving and running cost saving yearly, especially in the dehumidification process.     

中国网通大连通信枢纽中心空调设计

本工程采用具有自然冷却功能的风冷冷水机组作为冷源,机房末端采用冷水型机房专用空调机组。介绍了空调水系统、气流组织方式、系统控制等的设计,给出了主要的经济技术指标,总结了本工程的经验和不足。     

干盘管技术在办公类建筑中可实施性的静态分析

本文针对干盘管技术在办公类型建筑中的应用,静态分析了以下两个方面：人均新风量取值对新风系统的影响;人均新风量取值对风机盘管系统的影响。根据上述分析的结果,讨论了在办公类型建筑中应用干盘管技术存在的三大问题：人均新风量的取定问题;新风再热过程中能量回收问题;干盘管技术中冷冻除湿方法的应用问题。从而揭示了干盘管技术在办公类型建筑中的可实施性。     

风机盘管加新风空调系统ε值比较设计方法

通过分析风机盘管机组热湿处理能力与室内热湿比、新风终状态的相互关系，提出了可用于风机盘管加新风空调系统设计的ε值比较法。     

某夏季干热地区办公大楼报告厅夏季空调设计

以新疆某办公大楼报告厅空调系统设计为例,分析了夏季干热气候区室外空气设计参数的特殊性。着重介绍了变制冷剂多联机+全热交换系统、风机盘管+新风系统、一级蒸发冷却系统、二级蒸发冷却系统及采用屋顶全新风机组,并结合本项目对这几种不同的空调系统进行分析与比较,确定了适合本项目的空调系统形式。     

对《"干盘管"误解剖析》一文中4个问题的探讨

针对该文,讨论了实验中以观测法作为风机盘管干工况运行判断依据的问题;重申了基于干球温度效率法的风机盘管干工况冷量修正方法的有效性和可靠性;分析了干盘管系统对新风再热调节的需求,并提出应采用合理的新风再热调节手段以降低系统能耗;探讨了"干盘管"防凝结水产生的控制问题。