建筑节能工程中的暖通空调设计分析

以建筑节能为出发点,系统分析了暖通空调系统在工程节能中存在的问题,提出了科学的设计方案,并就建筑工程对供暖系统整体设计的合理性作了详细论述,以提高暖通空调系统的节能效率。     

毛细管粗糙度对空调器性能影响的试验研究

针对不同长度、不同粗糙度的毛细管,测试其流量,同时测试装有不同毛细管的空调器制冷量及能效比(EER),分析毛细管长度和加工粗糙度对系统温度、制冷量及能效比的影响。结果表明,由毛细管内径不一致引起的毛细管粗糙度的不同对系统影响最大,毛细管内径减小可导致系统能效比降低0.1以上,对整机制冷量的影响达到5.5%。     

分体式空调器长连接管制冷剂追加量的试验研究

基于制冷量为12 kW的风管送风式空调(热泵)机组进行试验研究,分析节流位置、工况等因素对长连接管制冷剂追加量的影响,得出9.52 mm液管和15.88 mm气管条件下R410A制冷剂追加量的参考值。研究发现,对于单冷型空调器,节流位置会对长连接管的制冷剂追加量产生较大影响,室内机节流时的追加量大于室外机节流;而对于热泵型空调器,节流位置对长连接管制冷剂追加量的影响较小。     

电梯空调设计特点及凝结水消除方案比较

分析了电梯轿厢专用空调器的设计特点，并着重分析比较了消除空调蒸发器中产生的凝结水的方案。认为采用室外侧轴流风机，冷凝器及PTC热敏电阻加热元件联合工作的方案最为合适。当轴流风机与冷凝器在结构上无法匹配时，则单独采用PTC元件加热处理。同时指出为实现这些方案在空调器结构设计，控制等方面需要进行的变动。     

Fuzzy logic controller implementation for a solar air-conditioning system

The implementation of a variable structure fuzzy logic controller for a solar powered air conditioning system and its advantages are investigated in this paper. Two DC motors are used to drive the generator pump and the feed pump of the solar air-conditioner. Two different control schemes for the DC motors rotational speed adjustment are implemented and tested: the first one is a pure fuzzy controller, its output being the control signal for the DC motor driver. A 7 × 7 fuzzy matrix assigns the controller output with respect to the error value and the derivative of the error. The second scheme is a two-level controller. The lower level is a conventional PID controller, and the higher level is a fuzzy controller acting over the parameters of the low level controller. Step response of the two control loops are presented as experimental results. The contribution of this design is that in the control system, the fuzzy logic is implemented through software in a common, inexpensive, 16-bit microcontroller, which does not have special abilities for fuzzy control.     

某110kV变电站空调通风设计方案

通过对某110 kV变电站空调设计的介绍,阐述了在此类设计中应如何根据实际功能与使用情况合理设计选用空调系统及通风系统,使之在保证电力设备安全正常运行的前提下,满足空调的使用要求。     

列车空调机组性能试验台布置方案比较与分析

本文对列车空调机组性能试验台的三种方案进行了讨论,为车辆维修部门配备该类设备提供了有益的参考。     

A Study on Residential Clothes Drying Using Waste Heat Rejected from a Split-Type Room Air Conditioner (RAC)

This article reports on a study of developing a novel residential clothes dryer using waste heat rejected from a room air conditioner. An experimental rig has been set up and extensive experimental work under various operating conditions carried out. A simplified mathematical expression (SME) for the clothes drying process using rejected waste heat from a RAC has also been developed and validated by the experimental results. The study results showed that in tropical or sub-tropical regions, where air conditioning is operated for at least 7-8 months in a year, the use of waster heat from an air cooled RAC can achieve both effective clothes drying and energy use reduction.     

管翅式全铝换热器在家用空调上的应用研究

本文对家用空调器换热器采用管翅式全铝换热器的材料选择、试验分析、焊接工艺等进行了研究和分析,提出了管翅式全铝换热器在家用空调器上的应用可行性。     

某办公楼中央空调节能措施的经济效益分析

通过对具体工程实例分析和论述,得出中央空调的节能可以通过提高制冷主机冷凝器的换热效率来提高主机在常年运行时高效节能,并利用冷凝热回收技术来回收原来冷却塔带走的热量,这样既可得到免费热水,又可以减少冷却塔的排放热量,利用新风全热换热器来回收排风中的冷量,并通过空调自动控制系统,在中央空调各种不同工况时,进行优化控制,实现整个系统的节能运行,从而达到降低整个中央空调系统能耗的目的。