English

Experiments with room air distribution that is generated by a radial ceiling-mounted diffuser and a diffuser generating flow with swirl are compared with the air distribution obtained by mixing ventilation from a wall-mounted diffuser, vertical ventilation, and displacement ventilation. The air distribution generated by a radial diffuser is partly controlled by the momentum flow from the diffusers and partly from gravity forces where the thermal load and the temperature difference between room air and supply air deflect the radial wall jet down into the occupied zone.

Volatile organic compounds (VOCs) are major gas-phase indoor air pollutants, and filtration is one of the promising methods to control indoor VOC concentration levels. An adsorption technique is commonly used for filtration of VOCs using adsorbents such as activated carbon. Unlike a particlefilter system, the applications of gas-filter systems have not been widely studied, and standards for the evaluation of gasfilter systems do not exist. As groundwork for standards development, this study proposes an experimental method that can evaluate the performance of gas filters in removing VOCs.

Because of their ability to improve building air quality and their potential to reduce energy usage in some climates by allowing more conditioned air recirculation, use of gas contaminant filters in buildings is increasingly considered. Air cleaning is an option under ASHRAE Standard 62 and is

This paper provides a method for verifying the accuracy of computer models that simulate the performance of the airhandling components of four types of heating, ventilating, and air-conditioning systems: the dual-fan VAV dual-duct system, the single-zone system, the four-pipe fan coil system, and the four-pipe induction system. To accomplish this, a detailed description of each system and its operating parameters was developed and a set of eight test conditions was generated, consisting of carefully chosen space loads and weather conditions.

A new all-electric retail store located in Montreal, Canada, incorporates several design features to maximize the interactions between various building components. The twostory, high-performance, "green" commercial building is the result of an integrated energy design process and features

Electronics densification is continuing at an unrelenting pace at the server, rack, and facility levels. With increasing facility density levels, airflow management has become a major challenge and concern. Hot spots, air short-circuiting, and inadequate tile airflow are a few of the issues that are
complicating airflow management.
This paper focuses on a thermal management approach that simplifies facility airflow management in a cost-effective and efficient manner. Implementation of the technology was undertaken with the DOEs Pacific Northwest National Laboratory.

For that study, three different personalized ventilation (PV) systems are investigated : the desk-edge-based PV, PV using a movable panel (MP) and chair-based PV, they all are able to lower human exposure to ambient room pollutants. To quantify their accommodation to individual thermal preferences a numerical method has been developed. The use of a numerical thermal maninkin (NTM) coupled with a human-body thermal regulation model appears to be a useful tool for the visualization of thermal comfort and ventilation effectiveness.

The aim of this paper is to document an adapted methodology for the measurement of airflow rates provided by each unit, along with the inter-unit airflow rates and the global ventilation efficiency. A case study is presented. The most accurate method appears to be different for small and large recirculation ratios.

The objectives of this work are the analysis and the evaluation of the global thermal comfort and local thermal discomfort levels of an occupant submitted to a nonuniform airflow. The incident airflow, the airflow around the occupant, the occupants' surface skin temperatures and convection coefficient are characterized too. The results of the experimental tests are presented

A field study was conducted to investigate how the open-plan offices influence the occupant satisfaction. It is part of the Cost-effective Open Plan Environments project. Physical data and questionnaires were collected from nearly 8OO open-plan office workers and their workstations. That study provides an important step forwards in developing constructive recommendations for the design and operation of open-plan offices.