新型回风检修箱在风机盘管中的应用

风机盘管在整个使用寿命周期内,风机的维修保养是十分重要的。但利用回风口对风机盘管进行检修的普遍做法已无法满足新技术规范的要求。本文设计了一种新型的回风检修箱,介绍了其构造特点和使用功能,通过在工程项目中的安装使用,验证了该风机盘管回风检修箱在中央空调系统中运用的可行性。     

中央空调系统风机盘管的选用原则

中央空调系统选用风机盘管时,合理的选用原则是在设计工况下的冷量(显热冷量、全热冷量)和风量应满足设计的要求;不同的使用场合,对风机盘管性能的要求还应有所侧重.     

从设计入手搞好空调系统的节能

从负荷计算、冷源主机配置、风机风压的确定和水系统优化四个方面提出了中央空调节能设计的一些方法,同时指出了目前中央空调设计中存在的一些问题。     

中央空调系统的能量分析

对风机盘管+新风系统（FC+OA）的中央空调系统进行了能量平衡分析。给出了中央空调系统的能量平衡模型和能量平衡方程,并对中央空调系统的各子系统进行了能量分析。依据中央空调系统的能量分析计算实例,给出了提高中央空调系统能量利用率的有效途径。     

河水自然冷源中央空调系统及其经济性分析

本文分析介绍了国内首例河水自然冷源中央空调系统-鲤鱼江电厂中央空调系统的设计思路。性能特点和运行效果。提出采用河水自然冷源制冷具有很好的经济。社会和环境效益和很大的推广价值。     

加强风机盘管维护保养、预防滴水盘冷凝水外溢、改善室内空气品质

本文介绍了风机盘管加新风系统组成的半集中式中央空调的组成、特点.指出在使用过程中常见的故障如滴水盘冷凝水外溢、空气过滤器堵塞、空调翅片脏堵、风机盘管水过滤器脏堵对空调系统的影响及对策.     

风机盘管变冷水温度运行的性能研究

通过实验分析影响风机盘管冷量的因素，研究了在风机盘管空调系统中冷水温度变化对末端空气处理设备热湿处理能力的影响；确定了判断满足风机盘管设计要求的变水温工况方法及最大冷水供水温度，为风机盘管空调系统变水温节能运行提供依据。     

中央空调末端设备及水系统节能探讨

通过中央空调工程能耗调查,末端设备及水系统的能耗占中央空调总能耗的60～70%,研究和探讨末端设备及水系统的节能,对中央空调节能具有重要意义.文中对空调机组、风机盘管、冷(热)水系统、冷却水系统的节能进行了探讨,提出了一些切实可行的节能措施.     

中央空调提供冬季施工供暖应注意的问题

在华北地区,部分跨冬季施工的建筑工程,为了保证工期,甲方会要求中央空调在冬季供暖期提前运行,这对空调系统施工组织方法和系统运行管理提出了特别要求。要先组织空调水系统干管、热力机房和施工区域的风机盘管的施工,在运行时要对风机盘管回风口采取特殊的保护措施和严格的管理要求,尽量减少风机盘管受损,同时还要要求甲方协调好冬季供暖的外围工作。     

浅谈风机盘管加新风空调系统噪声控制措施

本文针对风机盘管系统噪声问题，通过对多个风机盘管加新风空调系统的设计和安装特点的分析，总结了控制该系统噪声较为有效的措施。     

基于溶液除湿潜能释能的制冷系统的构建与研究

基于溶液除湿潜能的蓄能模式，构建一种新型除湿潜能释能冷水机组，以给空调系统提供冷源，特别是为辐射供冷的空调系统提供冷源途径。介绍了新构建系统的流程形式与工作过程，阐述了潜能蓄能机理，从理论上计算分析了该系统的单位理想制冷量随蒸发温度、冷却水温度和溶液浓度的变化关系，数据结果表明该系统在一定工况下能获取空调用冷水，并具有较大的单位理想制冷量，单位理想制冷量能达到10kW，该系统所能获取冷冻水的理论最低温度为除湿干燥后湿空气的露点温度。     

Experimental study on automotive cooling and heating air conditioning system using CO2 as a refrigerant

Recently, as one of the countermeasures against the global warming and energy conservation problems, natural refrigerants such as CO₂ are now paid attention as substitutes for HFCs in automotive air conditioning systems. Also, in recent years because the heat release from the eco-car's engine decreases, there is a problem that the present automotive heating air conditioning system cannot provide sufficient heating capacity.

As an alternative approach, we focused on a solution utilizing a CO₂-based heat pump, whereby the waste heat from the heat pump cycle during dehumidification of the incoming air (referred to as the dehumidifying condition) is recovered and used as an auxiliary heat source instead of an electric heater. Based on this concept, we aimed to develop an effective automotive cooling and heating air conditioning system using CO₂ as a refrigerant.

As the result, a prototype CO₂ automotive cooling and heating air conditioning system for medium-sized cars was successfully developed. With this system, performance superior to that of the present HFC134a system can be achieved.     

中湿度地区蒸发冷却复合式空调系统与传统集中(半集中)式空调系统的比较分析

以西安地区某办公楼为代表,通过对西安地区气象参数的统计,对中湿度地区蒸发冷却与机械制冷相结合的集中式空调系统、蒸发冷却与风机盘管相结合的半集中式空调系统,分别与传统的集中式和半集中式空调系统进行了对比分析。结果表明,采用蒸发冷却与传统空调方式的结合,可以大大减少冷水机组装机冷量和运行时间,从而节约了运行成本,提高了系统的能效比,为中湿度地区蒸发冷却工程应用提供了依据。     

关于冷媒变流量多联机空调系统设计的探讨

根据多联机空调系统的特性,分析了配管长度对多联机空调系统制冷量和能效比的影响;提出了合理使用多联机、提高空调系统制冷量和能效比的建议。     

电动客车用余热回收型热泵的换热器优化及性能实验研究

本文针对热泵空调系统在冬季低温工况下制热能力衰减问题,通过换热器设计优化,研发出基于喷射补气的余热回收型热泵空调系统,并进行了性能实验研究.结果表明:研制的准二级压缩电动客车热泵空调系统在低温条件下具有较好的制热性能.在环境温度为-20℃,车内温度为20℃,余热量为1.8 kW的制热工况下,相比于无余热回收工况,系统制...     

某移动通信综合大楼空调冷源优化方案分析

针对综合楼普遍存在的空调冷源装机容量偏大的情况,为节能及减少初投资,依据现有建筑平面布置、建筑热工性能和本建筑物使用特点,采用计算模拟软件对空调冷源的装机容量和空调运行能耗进行计算和模拟;根据计算模拟结果,提出空调冷源系统的优化方案,以达到减少初投资、提高冷源运行效率的目的。     

Performance evaluation of a stack cooling system using CO2 air conditioner in fuel cell vehicles

A relation between the heat release from a fuel cell stack and an air conditioning system's performance was investigated. The air conditioning system installed in a fuel cell vehicle can be used for stack cooling when additional stack heat release is required over a fixed radiator capacity during high vehicle power generation. This study investigated the performance of a stack cooling system using CO₂ air conditioner at various operating conditions. Also, the heat releasing effectiveness and mutual interference were analyzed and compared with those for the conventional radiator cooling system with/without cabin cooling. When the radiator coolant inlet temperature and flow rate were 65 °C and 80 L/min, respectively, for the outdoor air inlet speed of 5 m/s, the heat release of the stack cooling system with the aid of CO₂ air conditioner increased up to 36% more than that of the conventional radiator cooling system with cabin cooling. Furthermore, this increased by 7% versus the case without cabin cooling.     

户式中央空调的节能研究

对户式中央空调系统节能问题作了研究,从住宅建筑空调负荷的计算特点和方法、系统主机容量的确定、末端设备的选择到系统调节特性等诸多方面,综合考虑,并结合实际工程,阐述了影响户式中央空调能量消耗的各种主要因素和改进措施.     

宁波东方明珠城高层住宅双向辐射供冷空调系统设计

介绍了宁波市东方明珠城高层住宅辐射空调系统的辐射地板结构与供冷量计算、系统设计等内容。该项目在国内首次采用了双向辐射供冷及供暖设计,大大增加了供冷能力,同时也升高了地面温度,降低了结露的风险,提高了人体舒适感。     

Performance evaluation of a combined variable refrigerant volume and cool thermal energy storage system for air conditioning applications

In recent years, the growing needs for fulfilling the comfort cooling requirements with efficient refrigerating and air conditioning systems have gained impetus. In this work, the performance of a combined variable refrigerant volume (VRV) and cool thermal energy storage (CTES) air conditioning (A/C) system was experimentally investigated for summer and winter design conditions. Experimental results suggest that the VRV-CTES A/C system (combined A/C system) precisely maintained the indoor temperature at 24 °C for year-round operational conditions. The PCM being applied has exhibited good latent heat capacity (~160.81 kJ kg⁻¹) with congruent phase transition characteristics (~9.92 °C), even after 1000 repeated thermal cycles. Furthermore, the reduced cooling capacities and reduced combined power consumption were attributed to the improved performance of the combined A/C system. In total, this system would be beneficial in terms of accomplishing comfort cooling needs for conditioning applications without sacrificing energy efficiency.