This paper concentrates on the results of sustainability caused by Courtyard as a climatic element in Iranian traditionalarchitecture of cold regions. Traditional architectureof Iran is perceived sustainable for having sustainablefeatures. It is able to response to environmental problems from a long period. Its features are based on climatic factors as well as local construction materials of cold regions and Courtyard (hayate- markazi) is one of this features .Courtyard as one of the determining and organizing factor of traditional architecture in cold regions involves varies aspects.

One of the research areas of the Energy research Centre of the Netherlands (ECN) concerns the built environment.Several facilities to conduct the research activities are at ECNs disposal. One of these facilities, are five research dwellings located on the terrain of ECN. Measureddata from these facilities together with weather data and computer models are used to evaluate innovativeenergy concepts and components in energy systems on their performance.

The objective of this work is to compare the thermal behaviorof two systems of beam ceilings used in the Collegeof Architecture of the Independent University of Chiapas - Mexico. The beam ceiling base (show room) is of reinforced concrete with 10 (ten) centimeters of thickness that will be reference for comparative degree how much to the internal temperature of air in relation the construction covered with developed technology of in the College of Architecture of the UNACH that has water blade of 15 (fifteen) centimeters of thickness.

Sustainable development means that any encroachment into the ecosystem must be done in such a manner that the survival of future generations is not threatened in any way.In simple terms this means that we should leave the world for our children a better place that we found it.The notion of Sustainability in building and urban developmentrefers to the effects of building on the environmentin all their phases from the production of building materials to the use of ecologically sound and non-toxic substances in building and finally to the eventualdemolition of the buildings.It includes factors

The goal of this study was to suggest a low-density typologyfor commercial buildings to be applied in the cultural and climatic context of Athens, Greece, with minimal demand for conventional cooling. More specificallya typology of double enclosure was studied with self-contained structures sheltered within an outer shell. The research develops through studies of built examplesin Athens and analysis of the parameters affectingthermal comfort and adaptability. Dynamic thermal simulations were used to gain understanding of the energybehaviour of the double enclosure typology.

The main decisions concerning thermal comfort and energyefficiency of buildings are made in the early stages of the architectural design. Common practice relies on general indications based on climate analysis and heuristicrules about orientation, thermal mass and so forth. Such an approach usually demands assessment by simulation,deriving in an empirical process of check and see. Another approach would be to think of the building as an adaptive system with a potential to ensure thermal comfort.

Social, financial, energy and technical data from about 1110 households have been collected during 2004 in the major Athens area. The sample has been divided in seven income groups and a detailed analysis has been performed. Important conclusions have been drawn regarding the quality of households, the operational conditions and the energy spent per income group. Low income people are more likely to be living in old buildings with poor envelope conditions. The cost per person and unit area is much higher for the low income group for both heating and electricity.

A methodology approach in order to simulate numerically(CFD) a greenhouse equipped with fan and pad evaporative cooling system is presented. Using the main aspects of evaporative cooling systems in terms of heat and mass transfer, the flow and boundary conditions of the simulation model are identified integrating both the external and internal climatic conditions. The crop (tomato)was simulated using the equivalent porous mediumapproach by the addition of a momentum source term.

Optical properties (i.e. reflectance, transmittance, etc) of light scattering materials can be described using two approaches.The first approach, models the interaction of light with the matters particles (microscopic approach), while the second, models the light fluxes into and out of bulked considered matter (macroscopic approach). Kubelka-Munk (K-M) is the most common theory of macroscopic modeling, for calculating the change of light fluxes (two-flux theory) as a function of scattering, absorption, and distance.

Innovative development strategies for a “Mediterranean urban planning project” for the city of Umbertide- Umbria , organized in a new ecological, bioclimatic and energy sensitive residential/mixed-use, car free district of 1.500 inhabitants, focused on an