English

Installation of an evaporatively cooled hydroponic greenhouse on the roof of building can yield net energy savings for the combined structure, when compared to conventional air conditioning, and can conserve space by adding productive capacity to the rooftop. The proposed system offers energy and water savings far exceeding the levels achieved by traditional green roofs, but requires circumstances that favor co-location of a technically sophisticated agricultural facility with the building.

A two-storey wood frame house for the experimental study of hybrid residential ventilation was built in the campus of the Brno University of Technology in 2003. The house is fitted with a demand controlled hybrid ventilation system assisted with solar chimneys. Demand control of the system is based on the monitoring of carbon dioxide concentrations in rooms. There is a data acquisition installed in the house that monitors a number of parameters related to the performance of the house and the ventilation system.

Due to the exhaustion of fossil resources and greenhouse warming, the control of energy has become a key subject for the 21st century. To control energy demand, each countryhas to conceive low and very low energy buildings.In this context, we first inquire what characterize low and very low energy building so as to agree on a definitionof those buildings. Then, the paper introduces the seven guidelines of design of low energy buildings and describes techniques to set them up.

The objective of this work is to find the optimum window-to-wall area ratio that minimizes the energy cost for cooling, heating and daylighting. Both heating and cooling load are affected by the U-value and the solar heat gain coefficient (SHGC) of the glass whereas the amount of daylighting is affected by the coefficient of visual transmittance of the glass. For this purpose a genetic algorithm is used which is an optimum search technique based on the concepts of natural selection and survival of the fittest.

The scope of the current paper is to present two buildingprojects that have been designed within 2006 by Gavalas Architects & Associates. On both of them, the main target was to produce a result of high functionality and innovative aesthetics while resulting a low-energy building, using mainly simple passive systems, providingthe best possible environment for the occupants. From a sustainability point of view, the main targets are: To reduce the energy consumption for heating during winter season and for cooling during summer season.

In this paper, the design and development of a web databasefor the purpose of storing and processing data produced by a complete building energy analysis is presented. Additionally, a web site that provides access to the database as well as a set of processing functions is outlined.

Traditional architecture while energy consumption has not been defined as today, have utilized some passive design methods by attending to the potentials of the regionand made them highlight. At hot climate such as Iran, one of the outstanding technical solution for providingventilation, both for body and structural cooling, were already used in ancient times. Furthermore, other techniques had been applied for achieving comfort and controlling it, as main target, at night, day and each season.A fundamental idea of this approach is focusing on providing zero-condition.

Thermal insulation in the warm climate can reduce the energy demand for cooling in residential buildings up to 70%.To define the gap in between the actual applied thermal requirements and what would be todays economic optimum,Eurima ordered a study to Ecofys which also quantified the impact of thermal insulation in reducing the cooling demand in residential buildings.

This paper investigates the possibility of integrating thermal energy storage to the hot side of LiBr/H2O absorptioncooling system to cover 100% of peak cooling load for a three bedroom house on the hottest summer day in Cardiff, Wales. A shell and tube experimental systemwas designed to conduct charging and discharging experiments using Erythritol (melting point 117.7C) as a phase change material, considered to have the highestenergy density in the temperature range investigated (90C to 120C). The results show that ?

This paper presents the results of a monitoring study carried out in the city of Adelaide, Australia, whose primaryaim was to calibrate a model capable of predicting air temperature in an urban street canyon for extended periods in a variety of weather conditions, on the basis of meteorological time series recorded at an open site exposed to the same meso-scale conditions (Erell and Williamson, 2006).