热泵型一拖二变频空调器的开发

将国内外最新的变容量控制、电子膨胀阀控制、室内外机独立解耦控制和智能旁通除霜控制等控制方法与计算机仿真优化设计应用于热泵型变频一拖二空调系统的开发，给出了系统的原理、结构，并进行了实验研究。结果表明，系统运行稳定可靠，性能系数达到国内同类产品的领先水平，并超过了国家单元分体热泵空调器的节能标准。也为多元变容量空调系统奠定了理论与实验基础。     

空调系统中的变容量技术

空调系统中的变容量是指有意改变机组输出容量以更好地匹配系统的制冷／制热负荷的技术。要达到这一目的可以采用多种方式，包括使用数码涡旋压缩机、变频技术、高温气体旁通等。甚至在空调系统中安装多个压缩机，分别将它们开启／关闭以匹配系统负荷也是变容量，但是代价比较昂贵。因此，在使用前必须了解变容量技术独具的优势，并尽最大限度地利用这些优势。     

变风量空调系统风机静压控制方法研究

使用空调系统模拟软件ＨＶＡＣＳＩＭ＋,研究了变风量空调系统中风机的定静压、变静压控制方法。根据模拟结果指出了风机的静压控制方法的特点是关键问题,并对定静压控制方法进行了实验验证。     

空调系统风量调节与节能

介绍空调系统风量调节的方法，重点是变风量空调系统，其控制方面包括定静压、变静压控制等方法，同时又讨论了空调系统中的阀门、风机与管路性能对控制的影响，并分析比较了各种控制方法的节能性能。     

空调系统节能控制分析

本文阐述了当前空调系统节能控制的主要内容,论述了空调系统整体节能控制的重要性,分析了群控、BA控制和变流量控制等节能控制方式。指出BA系统与变流量控制系统相结合,不仅可实现较好的节能效果,而且更经济实用。本文可为工程设计人员提供空调节能控制方面的参考。     

空调系统风量调节与节能

介绍空调系统风量调节的方法,重点是变风量空调系统,其控制方面包括定静压、变静压控制等方法.分析变风量末端的控制方式压力无关型和压力有关型,同时又讨论了空调系统中的阀门、风机与管路性能对控制的影响,并分析比较了各种控制方法的节能性能.     

变风量空调系统风机总风量控制方法

通过对压力无关型变风量末端的分析得出了设定风量作为控制变量,进而提出了变风量系统总风量控制方法,使用空调系统模拟软件ＨＶＡＣＳＩＭ＋对其与定静压、变静压控制方法作了对比模拟研究,并在实际系统中进行了实验验证     

数码涡旋多联式空调系统及其运行特性的实验研究

数码涡旋系统是一种新型的变容量技术。本文对数码涡旋压缩机的工作原理做了简述并通过实验对数码涡旋多联式空调系统中各台室内机的运行状况做了了解和分析，同时借助于系统总制冷量及压缩机输入功率的实测值，分析并印证了其工作原理。     

太阳能光伏支架系统的应用

本文结合工程实例,对该工程空调系统设计进行了探讨,对数码涡旋变容量多联空调系统进行了比较全面的介绍,对小型公共建筑空调设计有一定的参考价值。     

北京京林大厦中央空调系统设计

北京京林大厦是集商务、住宿、娱乐为一体的综合性建筑,空调系统采用水冷数码变容量多联水环热泵系统,在冬夏季节,空调系统与生活用中央热水系统互为利用,在满足供热制冷需求的基础上减少能源消耗;在春秋过渡季节,空调系统完全处于内部热量平衡状态,运行效率大大提高,降低运行费用。水冷数码变容量多联机是技术创新的多联机,它既继承传统水源热泵系统特点,又秉承风冷多联系统的优势,机组综合性能系数IPLV高达5.2,有效降低空调系统运行费用。     

不同制冷量空调器在住宅中应用的实测对比研究

通过实验测试对比了不同制冷量的定速房间空调器用于住宅卧室中时的室内温湿环境状况和空调器的耗电量情况。实验结果表明,当空调器容量过大时,空调器的除湿能力下降,室内相对湿度偏高,空调器耗电量大,实验日条件下,使用1.5 HP空调器时的室内相对湿度比使用1 HP空调器的室内相对湿度高5%,而1 HP空调器耗电量比1.5 HP空调器减少12.7%。     

Flow impact of an air conditioner to portable air cleaning

In order to reduce indoor pollutant exposure, people become increasingly interested in portable air cleaning devices, which can be positioned with flexibility. Such purification devices usually discharge cleaned air with strong momentum, which can interrupt indoor airflow created by air-conditioning units. If a well-organized air circulation to a portable air cleaner is not achieved, indoor air purification cannot be fully ensured. This study has used both measurement and computational fluid dynamics (CFD) modeling to investigate the flow interaction between an air conditioner and a portable air cleaner to purify indoor gaseous pollutants. A workshop environment conditioned by an air conditioner and cleaned by a portable air cleaner was mimicked in an environmental chamber to obtain data for validation of a CFD program. Then CFD was applied to evaluate factors that may affect air purification including: positioning of the air conditioner and air cleaner, air conditioner diffuser types, air-conditioning cooling or heating running mode, and location of pollutant sources. The study finds the simulation results are in good agreement with the corresponding experimental data. The positioning coordination of an air conditioner and an air cleaner, and selection of air conditioner diffuser types shall assure a good air circulation cycle to the air cleaner to improve air purification efficacy. In addition to the cleaner effectiveness, it is also recommended to evaluate an air cleaning device in terms of the absolute pollutant concentration, if the portable air cleaner is under the interaction of an air conditioner and the local performance data are interested.     

Research on seasonal indoor thermal environment and residents' control behavior of cooling and heating systems in Korea

Indoor thermal environments and residents' control behavior of cooling and heating systems were investigated in Seoul, Korea and compared with the results of previous studies. Twenty-four houses in summer, six houses in autumn and 36 houses in winter were used in this study. The measurement of temperature, humidity and air conditioner usage behavior was carried out. The clo-value, thermal comfort, sensation and basic data of the houses were also investigated. The indoor thermal environment in the summer had a high temperature and a high humidity ratio compare to standard comfort zone. Most of the indoor thermal environments at the time of starting the air conditioner in the summer were out of the comfort zone. Some of the data recorded while the air conditioner was stopped were in the comfort zone, but in many cases the temperature was relatively higher than comfort zone. Most indoor climate distributions in the winter were in the comfort zone and the indoor climate in autumn coincided well with the criteria of the comfort zone. Compared with results of previous studies in these 25 years, indoor ambient average temperature in winter has increased and the comfort temperature has increased in the heating period and decreased in the cooling period. This result indicates that the development of an HVAC system has created an expectation of comfort for residents and has shifted their thermal comfort zone warmer in winter and cooler in summer.     

燃气发动机驱动空调的原理及应用

综述了燃气发动机驱动空调的分类、压缩机特性、余热回收系统，与其他类型空调进行了比较。述评了燃气发动机驱动空调分别与电空调、燃气吸收式空调、热除湿系统、变频空调的组合。     

蒸发型冷气机在高温车间中的应用

介绍了蒸发型冷气机的性能、原理和结构,以及在高温车间的应用情况,认为与传统空调相比,蒸发型冷气机不仅能有效排除车间内有害气体,增加换气量,而且降低车间温度,适宜在高温环境下应用。     

Variable refrigerant flow systems: A review

This review study presents a detailed overview of the configurations of the outdoor and indoor units of a multi-split variable refrigerant flow (VRF) system, and its operations, applications, marketing and cost. Besides, a detailed review about the experimental and numerical studies associated with the VRF systems is provided. The aim is to put together all the diversified information about the VRF systems in a single source. According to detailed review, it is observed that the compressor frequency and the electronic expansion valve opening should be controlled simultaneously for the control strategies, and it is concluded that VRF system not only consumes less energy than the common air conditioning systems such as variable air volume, fan-coil plus fresh air under the same conditions, but also provides better indoor thermal comfort as long as it is operated in the individual control mode. It is found that even though the main drawback of the VRF system is the high initial cost compared to the common air conditioning systems, due to the energy saving potential of the VRF system, the estimated payback period of the VRF system compared to an air cooled chiller system in a generic commercial building could be about 1.5 year.     

住宅建筑区域供冷与其他供冷方式的比较

本文对采用区域集中供冷的住宅空调的特点进行分析,并与住宅空调中常见的另外2种供冷形式(分体式空调和户式中央空调)的运行特点、初投资和20年运行总费用等进行比较。区域供冷采用冰蓄冷加低温送风系统能提高空调效果,虽然初投资方面集中供冷比其他2种形式大,但是从20年的总运行和更新费用来看,区域供冷经济性最好。     

A model to study the effects of different control strategies on space humidity during part-load conditions

Many air conditioning systems have small moisture removal capacities and are not equipped to maintain space humidity under part-load conditions particularly during hot and humid periods. They are able to provide desired temperature control but humidity. The primary objective of this work is to identify control strategies that can be used to prevent significant indoor humidity degradation during part-load conditions. These control strategies are chilled water flow control, bypass air control, variable air volume control, run-around coil control and low face velocity/high coolant velocity control. Coil simulations have been employed to study the part-load performance of these control strategies. The coil model compares favourably with experimental data to within ±6.5%. Simulation examples are conducted for each control strategy under varying part-load conditions. Results from the coil model have indicated that some strategies are more effective than others in sustaining acceptable indoor humidity under part-load conditions. For instance, chilled water control strategy has been observed to produce highest indoor humidity throughout the range of conditions studied while variable air volume system provides highly effective dehumidification performance of the cooling coil. In addition, higher ventilation rates have been observed to increase the space humidity during part-load conditions.     

Experimental study on a residential temperature-humidity separate control air-conditioner

According to the temperature and moisture characteristics and current problems experienced in the Yangtze River Area, a temperature-humidity separate control air conditioner was developed. This unit can remove indoor sensible heat and latent heat load separately, and adjust indoor temperature and humidity respectively, thus improve indoor comfort and reduce energy consumption. The air-conditioner consists of an air cooling evaporator and a water cooling evaporator. Orthogonal experiments were designed to study the influence of outdoor temperature, indoor temperature, indoor humidity, compressor frequency, and refrigerant distribution ratio in air cooling evaporator (RDRAE) on the unit performance. The results showed that the dehumidification capacity ranged from 0 to 4.02 kg/h; the EER ranged from 2.71 to 4.57; the cooling capacity ranged from 6822 to 13,080 W. The results can help to make the control logic of the unit, and be used as the basis of energy consumption calculation. Units with temperature and humidity separate control could save about 15.6% of the cooling energy consumption against traditional residential air-conditioner, and 47.8% against the traditional residential air-conditioner that could control both indoor temperature and humidity.     

中央空调水循环系统变频节能控制

空调水系统能耗在整个空调系统中占有很大的比例,所以,对空调水系统进行节能研究具有重要意义。实践证明,运用变频控制技术的变频空调,可以实现快速、节能和舒适控温的效果。论文首先分析了空调水系统的组成及其工作原理,并探讨了冷水变流量的控制节能控制,最后使水泵工作在高效率区域的一些关键设计提出了一些建议。