架空地板送风系统技术探讨

探讨了架空地板送风系统的工作原理和特点，分析了该系统的送风静压层和送风特性，并从这种送风特性出发，综述了架空地板送风系统在室内空气品质、热舒适性和节能等方面的特点。通过分析，得出架空地板送风系统能够减小空气龄，提高换气效率和通风效率，显著改善室内空气品质；在热舒适方面，架空地板送风系统可以通过使用者调节出风方向和风量达到热舒适：在能耗方面，架空地板送风系统由于仅需维持工作区环境参数，使得送风量和风机压头减小，制冷机效率提高，在风机能耗和冷热源能耗上有着显著的经济效益。最后得出了架空地板送风系统将被广泛应用的结论。     

下送风气流组织影响因素的实验研究

通过人体热舒适试验，分析得出下送风气流组织的4个主要因素即送风口形式、送风口到人体的距离、送风速度、送风温度等对人体热舒适的影响，确定了其合理的取值范围，为下送风气流组织的设计提供了参考依据。     

生态建筑实践的从0到1--访黄汇建筑师

北潞春小区是国内第一生态住宅小区，采访其设计者黄汇建筑师，介绍小区的特点，在经济与技术方面的难点，揭示生态建筑实践从0到1背后融入的艰苦而庞杂的工作，并探讨了国内生态住区研究状况及发展方向。这个项目的实现说明，在国内现阶段有限的经济与技术条件下，完全可以建造生态型居住小区。     

CFD analysis of ventilation effectiveness in a public transport interchange

A study was conducted into the ventilation effectiveness of a ventilation system within a public transport interchange (PTI) in Hong Kong. A computational fluid dynamics (CFD), steady state computational model of the PTI was used to investigate and predict the typical pollutant emission pattern for buses. In Hong Kong, the displacement ventilation (DV) scheme is often employed for the PTI. The numerical simulation investigates the effectiveness of the DV system in removing pollutants from the occupied zone. An alternative model is proposed where the supply is located at the ceiling and the exhausts are located at the lower part of the columns. It was found that both systems could adequately ventilate the PTI; however, the ceiling based air supply system is able to provide improved thermal comfort and indoor air quality (IAQ).     

不同行为方式下人体热感觉与室内环境之关系

对影响人体热舒适度的室内物理参数及瞬态热的影响关系进行了详细分析，并对不同行为方式下人体主观因素进行了阐述，指出设计人员在设计时应考虑诸多因素，不同的行为方式采取不同的设计，以使人体达到热平衡的理想状态。     

Exposure duration in overheating assessments: a retrofit modelling study

ABSTRACT

A new indicator of overheating risk is introduced that more comprehensively represents heat stress and the way thermal environment is experienced. This indicator is compared with the industry standard overheating assessment approach (CIBSE TM52). This is demonstrated using an energy retrofit simulation case study of a typical London, UK terraced dwelling under different climate scenarios. Overheating was evaluated first according to TM52, then via an assessment of continuously overheated intervals (COIs) that account for the duration where adaptive limits are continuously exceeded. Results for the case study show that, first, extent of overheating can vary greatly based on climate uncertainties. Second, insulation retrofit only contributes to substantial overheating when the space lacks proper ventilation or protection from solar radiation. Nevertheless, overheating cannot be avoided completely under future climate scenarios even with appropriate passive cooling. More importantly, the results show that overheated hours tend to occur consecutively. This implies that violations of TM52 criterion 1 (which currently applies only at the seasonal scale) can occur at the monthly/weekly resolutions. This ‘buried’ information can be revealed via the COI approach to more comprehensively capture how an overheating situation unfolds in a manner more relevant to heat stress and occupants’ thermal experience.     

不同城市自然通风建筑热舒适状况研究

通过上海、长沙自然通风建筑内进行的人体热舒适调查研究，并结合有关文献中北京和天津热舒适研究的成果，对我国目前不同城市自然通风建筑内热舒适状况进行探讨。结果认为，我国自然通风建筑内热中性温度均略高于ASHRAE推荐范围，采用实测的舒适温度作为空调温度可节约大量的能量。     

重力循环式空调

分析了以传统空调式方式难以满足要求的某些应用场合的特点，进而介绍了近年在欧洲出现并得到了推广应用的重力式空调的原理，特点，形式适用范围及经济性，并以实例给出了设计计算方法。     

Effect of yarn properties on thermal comfort of knitted fabrics

In this research, thermal properties of 1×1 rib fabrics knitted by using various yarns of different properties were investigated with all details. The mentioned yarn properties were yarn count, yarn twist and combing process. The thermal resistance, thermal absorptivity, thermal conductivity, water vapour permeability of samples were measured with the aid of Alambeta and Permetest devices respectively. The results of the tests were evaluated statistically and the importance levels of the relationship between the measured parameters were determined. It is observed that yarn properties like yarn count, yarn twist and combing process of cotton have affected different thermal comfort properties of 1×1 rib knitted fabrics. While the yarn twist and yarn count increase thermal resistance values decrease and water vapour permeability values increase. The combing process has the same effect on the thermal properties.     

履带车辆履带预张紧力对平顺性的影响与仿真

为了分析履带预张紧力对车辆平顺性的影响,以某型高速履带车辆为例,在多体动力学仿真软件RecurDyn中建立了整车动力学模型,在不同车速下对履带预张紧力的不同取值对车辆平顺性的影响进行了仿真.结果表明,从平顺性最优的角度出发,该型履带车辆履带预张紧力取车重的10%左右较为合适.