The report describes measurements of the deposition of large particles from a small scale wind tunnel model of a chemical warehouse fire plume. A common feature of such fires is the discharge of relatively large particles with falling speeds of the order of m s- 1, partly generated by mechanical damage, which can fall out of the fire plume in a different pattern to that of the gases and fine particles. These large particles may also contain toxic components, so it is desirable to know their fallout pattern.

The dynamic performance of a radiative cooling system for buildings is calculated and presented in the present paper. The cooling system consists of a lightweight metallic radiator covered by a single polyethylene wind screen and used for cooling the ambient air below its designed initial temperature. The cooler air is directed and eventually mixed with the indoor air of the building to provide primarily instantaneous thermal comfort during the night and secondly to cool the interior mass of the building by convection, thus creating a cold storage for the following day.

Existing commercial buildings are surveyed and categorized based on the construction characteristics of their envelope. The envelope heat gain and the resulting cooling load demand are analysed with the aid of energy simulation tool DOE-2. l D. The concept of the overall thermal transfer value (OTTV) is applied to study the association of the envelope designs with the cooling requirement, and a modified approach in asessing the effective envelope heat gains under a sub-tropical climate is proposed.

The need for energy efficient buildings is outlined, and the principal issues relating to commercial developments are discussed. The importance of natural cooling is highlighted, and the associated principle are examined. Some ways in which this can be achieved in conventional steel framed construction are presented. The suggestions include passive systems which rely simply on exposing sufficient thermal capacity of the building fabric, and active systems which provide greater control and improved performance. They represent an application of technology for sustainable development.

A renovation of a dwelling stock in Slovak republic primary mission is a dwelling environment quality increase and dwelling houses essential operative energetical claims  decrease. Considerable means of an operative energetical claims decrease of these buildings is their airiness reduction, that leads to an infiltration air change under level of sanitariness needful. A heat consumption for ventilation optimalisation beside a collateral dwelling environment quality increase is possible to reach through a controlled ventilation systems applications.

Heat requirements of ventilation systems are becoming a dominant factor to be considered in energy balances prepared for residential buildings. This results from a consistent improvement of thermal insulating power and better tightness of partitions, as well as from the standards that ventilation systems have to meet in relation to the quality of the indoor air. This factor despite variable volumes of the air exchanged with the external environment, is not always considered in most estimates of thermal power quantities.

This paper deals with the simulation of VOCs concentration dispersion emitted from flooring material, with the purpose of understanding vocs emission and dispersion mechanisms. A test chamber is examined, whose flooring material emits a number of VOCs. Given the area specific ventilation rate and considering as boundary conditions experimental data for the examined compounds concentration, the dispersion of the vocs concentrations is examined, for two cases, steady state conditions and transient state conditions.