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An approach for modelling of fire in halls at solid materials burning, based on gas phase combustion models in ANSYS/CFX, is proposed. The models are suitable for quick prediction of the flue gases distribution and thermal loads on the building envelopes at a design stage. They was applied for numerical simulation of such processes in a coffee storage hall at different fire positions and forced anti-smoke ventilation. The thermal, fluid flow and concentration field were obtained at the modelled scenarios. Maximal thermal loads on the building envelopes are established at the case of fire near their non-streamlined parts.

An algorithm for modelling of the heat transfer in storage halls at different combinations of open doors and smoke vents is developed. The models allow numerical simulations of velocity, pressure and temperature fields in the halls in cases of transient and steady state conditions, taking into account the indoor buoyancy, heat sources, heat transfer through the building envelopes and outdoor wind pressures. The models are solved numerically via finite volume method in order to estimate the necessity of additional heating at a design stage of a courier logistic storage hall, situated in the temperate climate zone, at the hardest winter conditions of the region. Recommendations about the organization of the heating and the cargo input are done based on the analyses of the fluid flow and thermal fields at the modelled scenarios.

Finite element stress analysis of glass panels in insulating glass units (IGU) is carried out based on the temperature field determined by serial numerical simulations of the conjugate heat transfer varying with the ambient temperature and solar radiation during a year. The hermetically sealed gas cavity between glass panels is modelled by finite elements and the stress is analyzed when the gauge pressure is maximum positive or negative due to gas temperature change at different seasons. The influence of the primary and secondary sealant of IGU is discussed. The combination of loadings due to thermal expansion and to cavity pressure is analyzed. Important conclusions about IGU structure and its durability are drawn. [ABSTRACT FROM AUTHOR]

On the basis of an in-depth analysis, this article reviews the weaknesses of the targets in the district and municipal development plans in Bulgaria for the period 2007-2003. When it comes to planning and in particular the longterm (strategic) planning, the quality of the target setting process for the systems' development has key significance and predefines their future. Thus the accurate targets that are clearly formulated in the district and municipal development plans are the most important prerequisites for the development of these territorial units. Without satisfying this precondition, the resources and measures for implementing these plans, irrespective of their quality and quantity, will not result in the development of the territorial units throughout the country. In the future the conclusions that were drawn in the article could serve as a starting point for improving the target setting process when it comes to developing the plans for the districts and municipalities' development in Bulgaria. [ABSTRACT FROM AUTHOR]