English

Assessing the relative utility of subjective and objective indicators of perceived comfort of indoor environements was the aim of that paper. Physical environmental variables such as temperature, relative humidity and noise level, were measured in a hospital setting and patients and staff rated their perception of the indoor environment. It appeared with regression analyses that the subjective sensory ratings were better than objective indicators for the prediction of the overall rated indoor comfort.

For that study site-measurements have been carried out in the Shanghai International Gymnastics Stadium. Those measurements included outdoor environment (weather conditions and peripheral hallway), indoor air temperature distribution (occupant zone temperature, radial temperature near upper openings and vertical temperature distributions) and the heat balance of air-conditioning system. The results indicate that according the season, there is a difference in the characteristics on energy saving of upper openings.

The development of an innovative low temperature differential variable air volume fan-coil unit (LTD-VAV FCU) was carried out to improve the defects of VAV and cold air distribution energy-saving technololgies. The experimental results of the prototype are presented along with the authors conclusions.

For that study, supply air temperatures were measured in three duct systems, at the inlet of the duct and close to the point of delivery into the conditioned space with the aim of investigating the effect of increasing the solar reflectance of a duct in order to reduce conduction heat gains through the duct shell and to improve the delivery effectiveness.

The comparison of consumption of heating and of cooling in a building with or without double-skin when the heating and cooling natural strategies are or are not used, according to the level of insulation and to the orientation of the double-skin, is the aim of that study.

In order to help the engineers to have a good idea of the rate of return of variable-air-volume system in different areas of China , an evaluation program has been established by the authors : specific energy models of the primary equipments in HVAC system are established, the evaluation system compared to constant-air-volume system and fan-coil system is expounded.

The part-load dehumidification performances of three temperature control strategies (chilled water flow control, bypass air control, and variable air volume control) are compared in that paper. For the study of the part-load performance of those control strategies, coil simulations are used. The coil model has been validated. Simulation results and conclusions are presented.

This study focuses on the onset of natural convection in the insulation, on the one hand , and discusses the influence of forced convection on the other hand. Experimental studies were carried out in small-scale measurement apparatus, in-situ and large-scale laboratory measurements were made, along with numerical and theoretical work on convection in attic insulation.

For that investigation, the authors focused on moisture modeling. A new model is described, it is based on a CFD tool enhanced to include both detailed modeling of airflows in rooms and heat and moisture transfer in walls. The impacts of different boundary conditions are investigated ,in a 3D configuration. The way they influence microclimates in room are analyzed too.

This paper presents laboratory-measured performance of seven relatively new and large fan-filter units (FFUs). Their performance is compared to the one of smaller FFUs. That comparison was based on a set of performance metrics such as total pressure efficiency and energy performance index. Recommendations are provided too for further investigations to improve energy efficiency of FFU applications.