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Sensitivity Analysis of Parameters affecting Indoor Air Quality related to HCHO and TVOC Reduction

The objective of the study is to analyze the relative performance of factors affecting indoor air quality in multi-residential buildings in Korea. A study of the factors affecting indoor air quality is essential for establishing indoor air quality management strategies effectively. To observe the indoor air quality response following a modification of a given parameter sensitivity analysis was performed. The factors examined for the analysis include; wall+ceiling paper, adhesive for wall/ceiling paper, floor material, adhesive for floor material, and ventilation rate.

ASHRAE's new residential ventilation standard

The major concern for HVAC's professionals is the engineering of indoor environments, but health and safety must be a primary concern too. In so far as people spend nearly 90 % of their time indoors - mostly at home -, residential ventilation ought to have a large emphasis in ASHRAE. In this article, today's sources are examined (combustion, microbiologicals, radon and soil gas, particles, VOCs), then ASHRAE's residential ventilation standard requirements are listed.

Evaluation of flow capture techniques for measuring HVAC grille airflows

This paper discusses the accuracy of commercially available flow hoods for residential applications. Results of laboratory and field tests indicate these hoods can be inadequate to measure airflows in residential systems, and there can be large measurement discrepancies between different flow hoods. The errors are due to poor calibrations, sensitivity of the hoods to grille airflow non-uniformities, and flow changes from added flow resistance.

ECA 10: Effects of indoor air pollution on human health.

The report contains a summary discussion of human health effects linked to indoor air pollution (IAP) in homes and other non-industrial indoor environments. Rather than discussing the health effects of the main different pollutants which can be found in indoor air, the approach has been to group broad categories of adverse health effects in separate chapters, and describe the relevant indoor exposures which may give rise to these health effects.

Air and Pollutant Transport from Attached Garages to Residential Living Spaces - Literature Review and Field Tests

The National Institute of Standards and Technology (NIST) is conducting a study on the indoor air quality (IAQ) impacts and engineering solutions related to the transport of pollutants from attached garages to residential living spaces. Natural or fan-induced pressure differences across air leakage paths in house-garage (HG) interfaces can result in the transport of the contaminants generated in garages into adjacent living spaces.

STUDY ON THE RELATIONSHIP BETWEEN A HEAT LOSS FROM FLOOR HEATING AND AIR-CONDITIONING IN A LIVING ROOM

With radiant heating, it is possible to set room air temperature lower than when heating withair-conditioning because the human body is heated by a radiation. As room air temperature decreases,heat loss from walls and windows decreases, and so does the ventilation load. It is often said that theradiant heating, such as floor heating saves energy. This study calculates heat flow at the windows andthe walls of a living-room using computational fluid dynamics (CFD).

STUDY ON THE EFFECTIVENESS OF AIR-CONDITIONING AND VENTILATION SYSTEMS BY CFD ANALYSIS IN HOUSES

The purpose of this paper is to analyze the indoor thermal environment and ventilation efficiencycreated by various heating and ventilation systems using CFD. In the case of one room, the value ofmean local air exchange efficiency????*1 of breathing zone*2 becomes about 1.0, because fresh airspreads completely in the room when air-conditioners are operated. In contrast, when air-conditionersare not operated, the mean ?? becomes smaller than 1.0, and the area of poor ventilation efficiencybecomes large.

FIELD SURVEY ON THE ENERGY CONSUMPTION IN RESIDENTIAL BUILDINGS IN THE NIIGATA AREA

The purpose of this study is to investigate the actual conditions of the energy consumption of varioustypes of inhabited houses (e.g., wooden detached houses and condominiums) in the Niigata area. Afield survey was carried out from November 2002 to March 2005, and the energy consumption levelsfor the various uses were measured continuously. This paper describes the energy consumptions of alluses (e.g., electricity, oil, gas) in the house types.

Comparative study of the indoor air quality of naturally ventilated and air-conditioned bedrooms of residential buildings in Singapore.

For that study, IAQ measurements were carried out in 3 residential Singapore dwellings. CO2 levels were higher in air-conditioned bedrooms than in naturally ventilated bedrooms. Another survey demonstrated that almost all occupants using air-conditioners while sleeping presented one or more SBS symptoms than when using natural ventilation.

The study of active stack effect to enhance natural ventilation using wind tunnel and computational fluid dynamics (CFD) simulations

The use of a combined methodology of wind tunnel experiments and CFD simulations in order to study the potential of using active stack to enhance natural ventilation in residential apartments in Singapore is demonstrated in this paper. Comparison between the results obtained from the experiments and those from the simulations has been made.

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