Effectiveness of Purging in an Air-Conditioned Office Building in Singapore

This paper investigates the effectiveness of a Purging System in a high-rise office building in Singapore with the aim of improving indoor air quality. The study initially adopts a continuous monitoring concept to investigate the impact of a daily purging operation on pollutant concentration levels at the low, middle and high floors of the office building. Pollutants investigated include formaldehyde, carbon dioxide, carbon monoxide and total volatile organic compounds (TVOC).

The outdoor air ventilation rate in high-rise residences employing room air conditioners

This paper reports mainly on field studies were indoor overnight CO2 levels are monitored along with outdoor ventilation rates in bedrooms where room air conditioners are employed.The results of laboratory experiments using two typical RACs (room air conditioners) are also reported and discussed.

Natural ventilation in high-rise buildings with double facades, saving or waste of energy

For that study , three german buildings with double facades have been monitored for at least one year in order to evaluate their energetic performance. The first building had no air conditioning facilities, the second one had cooling equipment without mechanical ventilation, and the third one had cooling equipment combined with mechanical ventilation.

Enhancement of natural ventilation in high-rise residential buildings using stack system

The main aim of that study is to assess the status of natural ventilation in a typical four-room HDB (Housing and Development Board) flat in Singapore using scaled model in the wind tunnel and also to develop an effective passive or active stack system to enhance natural ventilation in the flat.

Façade ventilated high-rise : Deutsche Post headquarters, Bonn

The 40 story high-rise headquarter of the Deutsche Post AG in Bonn features an integratedcomfort and low energy concept. Contrary to common high-rise design, the building does not require a central mechanical ventilation system. Instead it is decentrally ventilated by a double faade, which decreases wind loads and allows for natural ventilation through window openings.The typical floor plan is designed to provide a cross ventilation from the double faade through officerooms to a central atrium serving as exhaust duct.

Comparison of outdoor and indoor mobile source-related volatile organic compounds between low-and-high-floor apartments

The hypothesis that there is a vertical variation in mobile source-related volatile organic compound (VOC ) concentrations in high-rise apartment buildings is examined in that paper.

Prevalence of respiratory symptoms of the upper and lower airways in office block workers, Rio de Janeiro, Brazil

A sample of 269 workers, selected randomly from 1600 employees of a sealed 42-storeyoffice building of a major bank in Rio de Janeiro, Brazil, responded to the standard RoyalSociety of Health Advisory Group questionnaire about Sick Building Syndrome.Upper airways respiratory symptoms occupied a prominent position, with a prevalence ofaround 40%, whereas the lower airways manifestations frequencies were below 20%.

Application of active stack system to enhance natural ventilation in high-rise residential buildings

This paper is about the application of active stack system to enhance natural ventilation inpublic housing in Singapore. About 86% of the population is staying in high-rise publichousing, known as Housing and Development Board (HDB) flats, which is designed fornatural ventilation. The main objective of this work is to assess the status of naturalventilation in a typical 4-room HDB flat using scaled model in the wind tunnel, and todevelop an effective active stack system to enhance natural ventilation in the flat.

Smoke control and high-rise office buildings with operable windows : two case studies

This paper describes the smoke control aspects of twonaturally ventilated high-rise office buildings with operable windows. One utilizes its operable windows in conjunction with an HVAC system to provide tenants with fresh air. The other utilizes a series of automatically controlled windows and
vents in conjunction with tenant-controlled windows to provide ventilation. Both buildings, located in San Francisco, were designed under the Uniform Building Code.

Tests of stairwell pressurization systems for smoke control in a high-rise building

Field tests of stairwell and vestibule pressurization systems were performed in a 32-story high-rise building. Pressure differences in the stairwell, and vestibule and average air velocity were tested under various conditions. Test results indicate that indirect pressurization through a stairwell is feasible. Ignoring stack effect, the worst door-opening condition is that the fire doors of the top or bottom three adjoining floors of the building are open simultaneously. Pressurization systems in