The aim of this paper is to create better room climatic conditions during reducing the room air temperature with the help of summer night ventilation. This study is carried on Aswan. Aswan lies in the biggest desert in south Egypt, where the climate is sever dry and hot. Calculations were done on a building model. A comparative study was held between Islamic, traditional and modern buildings to obtain the effect of night ventilation on the room temperature. The calculation is carried each hour, each day allover the year. The results are plotted for a representative summer day. Summer night Ventilation of 5 h-1 and 10 h-1 of the room air, between 20 h in the evening and 8 h in the morning, reduced the air temperature in a modern building ca. 5 K and 7 K consequently. The room air temperature in the modern building reached ca. 36 °C and 34 °C with these night Ventilation consequently, while the room air temperature without venting and the maximum outside air temperature were ca. 41 °C. This ratio of air change is achievable through opining windows and Doors, i.e. through natural ventilation. The minimum outside air temperature was about 26 °C, which means, that A more temperature reduction is reachable through architectural elements, which encourage the air movement or air suction or movement with a ventilator, i.e. hybrid cooling.

The aim of this paper is to achieve the thermal comfort inside building with the mean of passive and hybrid evaporative cooling. The application was carried on Aswan in south Egypt in the biggest desert of the world, where the climate is very hot and dry. A building model was developed to calculate the effect of the evaporative cooling. A comparative study is carried on Islamic, traditional and modern architecture building arts. The calculations was done each hour, each day allover the year. The results were plotted for a representative summer day. The evaporative cooling has a great effect on the room cooling. The comfort conditions were gained in the ground and upper floor with direct evaporation of 15 l/d and 25 l/d consequently accompanied with summer night ventilation 5 h-1. The required amount of water could be gained with the mean of water areas like fountains, or moving water areas like Salsabil, water walls, water drop units with the help of air movement.

Research, in the field of studying the effect of orientation on the ambient temperature of residential buildings, is still in its early phases despite the leaps made by studies and experiments. Most climatic studies focused on studying residential buildings as to: orientation, building materials use, thermal behavior, etc. This was done by theoretical studies and few on-site measurements. Studying orientation of residential buildings by simulation is rare in the Arab world. The present generation of climatic design tools should rely more on digital presentation by computers, in order to aid designers make sound design decisions based on visible results. Thus, the computer carries out all calculations relieving designers from their heavy burden. Due to the scarce use of simulation software in the climatic assessment of residential buildings; the study aims at studying the effect of orientation on the thermal performance of spaces in residential buildings at New Assiut City, Egypt. To achieve this aim, the research is done by the analytical and applied methods, using the simulation software Thermal Analysis Software, from the climatic analysis of New Assiut City - as well as identifying the prevailing residential patterns, and detailed study of the selected residential building, identifying the software used, and analyzing the simulation results for ambient room temperatures of the cold and hot periods - for different orientations of the selected model. The research ends with a number of results and recommendations. Such results may be applied in hot desert areas. Main Subjects

Research, in the field of studying the effect of orientation on the ambient temperature of residential buildings, is still in its early phases despite the leaps made by studies and experiments. Most climatic studies focused on studying residential buildings as to: orientation, building materials use, thermal behavior, etc. This was done by theoretical studies and few on-site measurements. Studying orientation of residential buildings by simulation is rare in the Arab world. The present generation of climatic design tools should rely more on digital presentation by computers, in order to aid designers make sound design decisions based on visible results. Thus, the computer carries out all calculations relieving designers from their heavy burden. Due to the scarce use of simulation software in the climatic assessment of residential buildings; the study aims at studying the effect of orientation on the thermal performance of spaces in residential buildings at New Assiut City, Egypt. To achieve this aim, the research is done by the analytical and applied methods, using the simulation software Thermal Analysis Software, from the climatic analysis of New Assiut City - as well as identifying the prevailing residential patterns, and detailed study of the selected residential building, identifying the software used, and analyzing the simulation results for ambient room temperatures of the cold and hot periods - for different orientations of the selected model. The research ends with a number of results and recommendations. Such results may be applied in hot desert areas. Main Subjects

Research, in the field of studying the effect of orientation on the ambient temperature of residential buildings, is still in its early phases despite the leaps made by studies and experiments. Most climatic studies focused on studying residential buildings as to: orientation, building materials use, thermal behavior, etc. This was done by theoretical studies and few on-site measurements. Studying orientation of residential buildings by simulation is rare in the Arab world. The present generation of climatic design tools should rely more on digital presentation by computers, in order to aid designers make sound design decisions based on visible results. Thus, the computer carries out all calculations relieving designers from their heavy burden. Due to the scarce use of simulation software in the climatic assessment of residential buildings; the study aims at studying the effect of orientation on the thermal performance of spaces in residential buildings at New Assiut City, Egypt. To achieve this aim, the research is done by the analytical and applied methods, using the simulation software Thermal Analysis Software, from the climatic analysis of New Assiut City - as well as identifying the prevailing residential patterns, and detailed study of the selected residential building, identifying the software used, and analyzing the simulation results for ambient room temperatures of the cold and hot periods - for different orientations of the selected model. The research ends with a number of results and recommendations. Such results may be applied in hot desert areas. Main Subjects

Research, in the field of studying the effect of orientation on the ambient temperature of residential buildings, is still in its early phases despite the leaps made by studies and experiments. Most climatic studies focused on studying residential buildings as to: orientation, building materials use, thermal behavior, etc. This was done by theoretical studies and few on-site measurements. Studying orientation of residential buildings by simulation is rare in the Arab world. The present generation of climatic design tools should rely more on digital presentation by computers, in order to aid designers make sound design decisions based on visible results. Thus, the computer carries out all calculations relieving designers from their heavy burden. Due to the scarce use of simulation software in the climatic assessment of residential buildings; the study aims at studying the effect of orientation on the thermal performance of spaces in residential buildings at New Assiut City, Egypt. To achieve this aim, the research is done by the analytical and applied methods, using the simulation software Thermal Analysis Software, from the climatic analysis of New Assiut City - as well as identifying the prevailing residential patterns, and detailed study of the selected residential building, identifying the software used, and analyzing the simulation results for ambient room temperatures of the cold and hot periods - for different orientations of the selected model. The research ends with a number of results and recommendations. Such results may be applied in hot desert areas. Main Subjects

Energy efficiency is an important issue that has been considered by many construction sectors. Recently, the research attention is focused on the thermal performance of the wall envelope, in particular, for its high energy consumption. This paper conducted a literature review highlighting the recent studies and research approach and methodology on the building wall envelope. Results indicate that climate, insulation and orientation are the key factors that should be considered on wall envelope design and installation.

The main goal of this study is to undertake the three methods of life cycle assessment (LCA), the environmental performance (EP), and the building information modeling (BIM) to determine the environmental performance and impacts of two window frame materials: aluminum and wood. This study has been carried out in a proposed project at the Assiut University campus. The LCA has been conducted by assessing materials and processes involved in manufacturing the two window frame types using the SimaPro. The LCA scope of this research covers from cradle to the gate with a designated system boundary. The network flow has been drawn to produce one kilogram of aluminum and wood; the quantities data were gathered from the BIM (using Autodesk Revit). Selecting the database is carefully picked from the Ecoinvent dataset to be closer to Egypt's manufacturing processes. Afterwards, the IMPACT 2002+ with midpoint and endpoint calculations has been used. Finally, the LCA results have been compared with the EP results (using DesignBuilder) to determine the best choice between the two materials. The integration analysis shows that the aluminum industry has higher negative environmental impacts and environmental performance than the wood industry. The total midpoint results of the two materials are found to be 29.6 for aluminum, and 7.57 the wood. Turning to the endpoint results, human health and resource depletion impacts are the most significant results. The human health scored the highest value, with 13.9 for aluminum and 3.51 for wood. A novel framework for integrating LCA, BIM, and EP for a proposed building during the early phases of a project has been conducted in this study. The presented study can be used as a model for integrating comparative analysis on other proposed projects as the LCA applications in Egypt are scarce due to the absence of a reliable database. This study has introduced a value applying an approach to select the appropriate life cycle inventory database from the Ecoinvent dataset. The research findings contribute to choosing the most suitable window frame materials with the most energy-efficient effect and the least environmental burden. Moreover, it can help the concerned legislative bodies and the decision-makers.

The energy consumption of fully glazed office buildings is very high due to the heavy cooling loads in summer. Therefore, building designers resort to the High-Performance Glazing System (HPGS) solutions to reduce solar heat gain and save energy. However, the selection of most sustainable HPGS is considered a complicated process because the one criterion decision method - which building designers still tend to use - cannot solve this complexity. Multi-Criteria Decision Making (MCDM) analysis can solve this problem and rank the alternatives. In this paper, the Analytic Hierarchy Process (AHP) - one of the MCDM methods - is applied by SuperDecisions software to rank three proposed HPGS alternatives for an existing office building in New Cairo, Egypt as a case study in a hot desert climate zone. Four criteria of sustainability (energy, environmental impacts, cost, and occupant comfort) are assessed and a new weighting method is applied based on LEED rating system to prioritize the alternatives. The ranking results show in the first place the Photovoltaic glazing system followed by the Low-E and Electrochromic glazing systems, respectively with a negligible difference. The Life cycle cost criterion is the major influencer on the ranking results according to the applied sensitivity analysis.

In hot desert climates, the office buildings with high-performance glazing systems (HPGSs) provide better indoor thermal and visual comfort to the occupants due to the advanced coatings which prevent the undesired heat gain and daylight. However, these systems save energy in the use phase; it could consume more energy in the pre-use and post-use phases. Furthermore, the use of advanced materials may have negative impacts on the environment. Therefore, this paper selected the comparative life cycle assessment method as an environmental measuring tool to compare the energy consumption and the environmental impacts of three HPGSs with that of the conventional clear double-glazing system. The results show that the photovoltaic glazing system (PVGS) has the lowest energy consumption and the lowest environmental impacts, followed by the electrochromic glazing system (ECGS) and the low-E glazing system. In the use phase, both PVGS and ECGS achieved the highest energy savings, 87% and 25%, respectively. The use phase has a major contribution to the energy consumption and environmental impacts, while the pre-use and post-use phases have insignificant contributions in this study. The results could support decision-makers in choosing the most environmentally friendly HPGS for their projects.