This paper gave an overview of the past and present applications of various Computational FluidDynamics (CFD) methods for indoor environment modeling. Typical applications used the CFD tocalculate airflow, air temperature, contaminant concentrations, and turbulence in enclosed environmentfor studying or designing thermal comfort and indoor air quality. With simple airflow and geometry, theCFD is capable of calculating accurately mean flow parameters but less accurately turbulenceparameters.

The selection of design solar irradiance in the current ASHRAE and CIBSE design handbooks isindependent on design dry-bulb and wet-bulb temperatures. The probability that the load would notexceed the system capacity determined on this basis may not match the reliability level that the designweather data were meant to safeguard. Hence, a statistic method was developed for the rationalselection of coincident solar irradiance, dry-bulb and wet-bulb temperatures.

The aim of the study is to quantify the traffic generated particle number concentration levels (PM2.5; PMwith diameter ? 2.5?m) at various heights of a typical high-rise building in close proximity to a majorexpressway in Singapore. A 22-storey naturally-ventilated high-rise residential building located about15m away from a major expressway was selected for the study.

A push-pull fume cupboard shown is an innovative device to remove pollutants from a fume cupboardto the outdoor environment. A push flow coming from the bottom of a sash and a pull flow behind thedoorsill are adopted to form an air curtain in the fume cupboard. Meanwhile, the roof of a push-pullfume cupboard is open to the environment and ambient fluids are drawn from the roof. To investigatethe performance of a push-pull fume cupboard, a numerical model based on the finite volume methodis utilized. Various ratios of push flows to pull flows are considered.

As highly insulated and airtight houses have built popularly, the problem which indoor air becomes lowhumidity in winter, is paid attention. The problem is caused by rise of heating level and increase ofventilation amount by mechanical ventilating equipments, etc.1)Then, to clarify the actual condition of indoor low humidity in winter, we monitored the actual humidityenvironment in 29 occupied houses in the Tohoku region and Niigata, Japan, from 2001 to 2006. As theresult, it is found that the indoor low humidity in winter is a common problem regardless of the housecondition.

In this present study, annual exceedance probability (AEP) analysis was applied as the method forassessing wind-driven natural ventilation in a street canyon, in which the effects of wind approachingfrom each direction were comprehensively taken into account. In order to evaluate the overallventilation performance in specific domain spaces within the street canyon, local air change rate andaverage kinetic energy were employed to calculate the AEP, instead of using the commonly adoptedvelocity ratio.

Until the end of 90-ties all dwelling buildings in Latvia were equipped with mandatory natural ventilationsystems with stack effect. Nowadays in many cases in dwellings there are only exhaust mechanicalventilation but air tight windows prevent natural air intake. Such systems result in bad IAQ.

Goal of the study is the system analysis and after that the complex analysis of the renewableenergy sources and cogeneration (CHP) including fuel cells. The process of the analysis consistsseveral steps. The first one is the global managerial methods as the PEST and SWOT analysis,where there are the variants evaluated by the qualitative words methods. The second part isbased on the multicriteria evaluation by different methods of complex analysis.

High local concentrations of a pollutant can be the result of high local emission rates of the pollutant orinsufficient ventilation. Using tracer gases to map the ventilation in multi-zone buildings combined withmeasurements of the local pollutant concentration provide the means to discriminate between thesecauses.

In this paper, a new experimental method for measuring thermal conductivity and thermal partitioncoefficient for building materials is presented. The uniqueness of this method is that theaforementioned physical properties are measured for the building materials under the same conditionsas in real life. This method is based on monitoring the temperature difference across the sample andthe solution of the transient conduction equation. The proposed method and designed apparatus weretested using some building materials (i.e.