A CFD-based parametric study was carried out for a prototype general exhaust system widely used for ventilation and control of diesel exhaust in large enclosed locomotive facilities. The parameters of fan flow rate, ceiling height, fan spacing, and locomotive position relative to the fan were varied between two values representing the low and high ends of their expected ranges. A set of simulations was set up using factorial experimental theory, which allows variables and interactions having a significant effect on an outcome to be identified.

Detailed measurements of the thermal characteristics of one one-row and one four-row ducted, hydronic air heating coil have been performed. The measurements were made in a carefully designed and produced laboratory setup, capable of creating almost perfect step changes of both water flow rate and supply temperature. The heaters steady-state characteristics were first modeled. The model was then calibrated with a set of measurements by means of parameter estimation. Then a couple of dynamic models, based on the calibrated steadystate models, were tested.

When applying the radiant floor cooling system using Ondol - the Korean traditional radiant floor heating system - it is important to select a precise control method to maintain a stable room temperature and floor surface temperature and prevent surface condensation. Therefore, it is necessary to systematize various control methods and to conduct a comparative study of the respective control methods so as to be able to control the radiant floor heating and cooling system efficiently.

A preliminary investigation has been carried out to determine the potential for using ultra-wideband (UWB) radar to determine the moisture level within building envelopes. Radio waves are affected by moisture content because their reflection from the surface of a material depends upon the dielectric

Issues associated with indoor air quality (IAQ) and its impact on occupant health have prompted research into the design and construction of healthy houses. Most of the houses constructed have been upscale housing. An affordable, energy-efficient, healthy house was built at Tuskegee

The aim of that study that lasted 5 years was to assess the effect of repairs made to moisture-damaged school buildings on the students' health. With repeated questionnaires it was possible to compare the occurrences of symptoms before and after the repairs in school.

This paper presents a study on the variability in chemical exposures or individuals that are working in eight different office buildings in Sweden. The variability among buildings and the variability among individuals has been evaluated for a selected number of detected VOCs along with the ratio between the two variances.

The aim of that study was to determine whether there was a quantifiable difference in biocontaminant levels between one school with a carpeted floor and another school with hard surface floor. During one year, air and floor dust samples were collected and analyzed. The results suggest that floor covering is not the major contributor to airborne levels of biocontaminants in nonproblem schools.

This study quantified the daily average concentrations of respirable particulates in rural homes from three Indian districts. Thanks to this data a model is being developed to predict quantitative categories of population exposure based on survey information on housing and fuel characteristics. A better estimation of health risks will be possible.

This paper reports the distribution of VOC exposures, and explores the statistical associations between concentrations and common sources and modifiers of exposure, and examines the associations between personal, indoor, and outdoor exposure levels in children.