某高层建筑中多联式热泵空调室外机热环境数值模拟研究

利用Airpak软件,结合具体工程模拟分析夏季工况下多联式热泵空调室外机在高层建筑中分层放置时的热环境特性。结合计算数据结果,分析不同室外机摆放位置时机组的性能情况。同时给出了多联式空调室外机设计的注意事项。     

Achievable working range for solid all-desiccant air-conditioning systems under specific space comfort requirements

Solid desiccant air-conditioning systems present a promising solution, in terms of performance level and environmental protection, pointing out their potential to be coupled with thermal solar or waste heat energy source. Nevertheless, these systems are characterized by constraints to the load they can satisfy, through the trade-off between the dehumidification cooling capacity and the latent load of the conditioned space. On that level, one has to note that, for steady environmental conditions, the conditioned space does not present unique value of load, but range of load, corresponding to an array of acceptable temperature and (usually relative) humidity values. In this work a methodology is proposed for the definition of the system's achievable working range under specific set of space (comfort) requirements. Through this approach, the systems present greater potential for covering the space requirements, thus presenting more possibilities on a design basis, and more flexible control strategies, as well. The proposed methodology is presented and discussed through the case study of a solar desiccant air-conditioning system coupled to a typical residential building.     

Solar integrated energy system for a green building

Shanghai is characteristic of subtropical monsoonal climate with the mean annual temperature of 17.6 °C, and receives annual total radiation above 4470 MJ/m² with approximately 2000 h of sunshine. A solar energy system capable of heating, cooling, natural ventilation and hot water supply has been built in Shanghai Research Institute of Building Science. The system mainly contains 150 m² solar collector arrays, two adsorption chillers, floor radiation heating pipes, finned tube heat exchangers and a hot water storage tank of 2.5 m³ in volume. It is used for heating in winter, cooling in summer, natural ventilation in spring and autumn, hot water supply in all the year for 460 m² building area. The whole system is controlled by an industrial control computer and operates automatically. Under typical weather condition of Shanghai, it is found that the average heating capacity is up to 25.04 kW in winter, the average refrigerating output reaches 15.31 kW in summer and the solar-enhanced natural ventilation air flow rate doubles in transitional seasons. The experimental investigation validated the practical effective operation of the adsorption cooling-based air-conditioning system. After 1-year operation, it is confirmed that the solar system contributes 70% total energy of the involved space for the weather conditions of Shanghai.     

华闻舟山外国语学校音乐厅及音乐教室暖通设计

介绍华闻舟山外国语学校音乐厅及音乐教室通风、空调系统的设计情况。     

Steady-state investigation of water vapor adsorption for thermally driven adsorption based greenhouse air-conditioning system

In the present study, water vapor adsorption onto silica-gel, activated carbon powder (ACP) and activated carbon fiber (ACF) has been experimentally measured at 20, 30 and 50 °C using a volumetric method based adsorption measurement apparatus for greenhouse air-conditioning (AC). The Guggenheim–Anderson–De Boer and Dubinin–Astakhov adsorption models are used to fit the adsorption data of silica-gel and ACP/ACF, respectively. The isosteric heat of adsorption is determined by Clausius–Clapeyron relationship. The adsorbents are evaluated for low-temperature regeneration with aim to develop solar operated AC system for greenhouses. Ideal growth zone for agricultural products is determined by which the steady-state desiccant AC cycle is evaluated on the psychometric chart and adsorption isobars.Steady-state moisture cycled (MC_SS) by each adsorbent is determined for demand category-I, II and III which are based on 60%, 40% and 20% relative humidity of dehumidified air, respectively. In case of demand category-I, the ACP enables maximum MC_SS at all regeneration temperatures (T_reg), ideally sitting at 47 °C. The ACF enables double MC_SS as compared to silica-gel during demand category-II at T_reg ≥59 °C. However, the silica-gel is found the only applicable adsorbent for the demand category-III.     

Compensation of flow maldistribution in fin-and-tube evaporators for residential air-conditioning

Compensation of flow maldistribution in multi-channel fin-and-tube evaporators for residential air-conditioning is investigated by numerical modeling. The considered sources of maldistribution are distribution of the liquid and vapor phases in the distributor and non-uniform airflow distribution. Fin-and-tube heat exchangers usually have a predefined circuitry, however, the evaporator model is simplified to have straight tubes, in order to perform a generic investigation. The compensation of flow maldistribution is performed by control of the superheat in the individual channels. Furthermore, the effect of combinations of individual maldistribution sources is investigated for different evaporator sizes and outdoor temperatures. It is shown that a decrease in cooling capacity and coefficient of performance by flow maldistribution can be compensated by the control of individual channel superheat. Alternatively, a larger evaporator may be used.     

从空气调节到空间调节：中国普天信息产业上海工业园发展公司生态科研楼设计

本文以中国普天信息产业上海工业园发展公司生态科研楼设计实线为例，提出从空气调节向空间调节的节能创作构思，并从热工环境、风环境、光环境分析设计过程中的被动式节能应对策略。     

西门子PLC和Pro—face HMI在空调末端控制系统中的应用

该文介绍了西门子PLC和Pro-face HMI在空调末端控制系统中的应用，着重从系统结构、硬件和软件系统的特点以及人机界面（HMI）的典型画面设计等方面进行了描述。     

三亚阜外心脑血管康复中心手术室空调方案节能分析

医院手术部空调系统能耗是相当大的，怎样既能达到设计温湿度要求又能节约能源是空调设计人员需要认真考虑的问题。以三亚阜外心脑血管康复中心两间I级手术室为例，分析了目前常用的几种空调方案，从能耗、控制精度、设备复杂程度等方面进行分析，从而得到此项目适合的空调方案。     

整车除霜除雾影响因素研究

整车除霜除雾系统在环模验证和实际使用中出现效果差或局部除不干净问题,影响整车的驾驶安全性能。对这些问题进行仔细分析,发现整车冷却系统、空气调节系统都对其有影响,并且以空气调节系统的影响为主要因素。为此展开详细分析,并提出有效解决方案。