ZEMCH 2015 - International Conference Proceedings | Page 738

meet many factors simultaneously such as the wind , solar radiation , and the functions . Therefore , the solar exposure of the building in the efficient case reduced 16 % of the incident solar exposure , making less cooling hours , and more energy saving .
For ventilation strategy , Allard ( 2002 ) argued that elevating the building and inclining the roof windward would enhance the wind movement and this supports the idea employed in the design . Also in the thermal insulation materials , changing building construction layers from the standard to a well assessed new system lead to better performance reaching up to 36 % reduction in the cooling loads .
In the natural daylight strategy , building proportions were redesigned , base-case wall were long , and the building roof – 9m high- was lowered down to 8m ; to get a denser volume . Windows were open widely and occupied a huge amount of the building facades in the base case , and it was refined to smaller and narrower openings .
Other enhancements were added applied within the design progress to the project , like a water pond right after the pedestrians ’ ramp to make an evaporative cooling effect . A green roof in the middle of the courtyard can be layered as greenery , soil , support and slab ( from top to bottom ) as ( Molina et al . 2006 ) mentioned , and this will keep thermal moisture and vapor liquidity within the courtyard . Both techniques integrate with the natural ventilation factor to create a fresh , and cooled down microclimate introducing the entrance in a balanced thermal capacity .
Conclusions
Designing passively deals pleasantly with nature and its conditions . The process in collecting data about the climate of Dubai and site context was the first step towards critical passive thinking . In this modeling experiment , many types of passive cooling strategies were discussed and tested through readings and software simulations and the final strategies were selected accordingly to improve the design form passively , fulfill the needs for the various functions , enhance the Indoor Environmental Quality ( IEQ ), and reduce the annual amount of mechanical cooling loads which leads to save energy and decrease CO2 emissions . Some viewpoints based on the passive system opened a floor for discussion ; to develop a building that merges all considerations derived from other studies , or inspired by the design concept .
By the aid of simulation software ( IES VE ), each strategy was conducted on the building , and indicated the amount of saving and the variation occurred to improve the building . Results were compared before and after each strategy , and the changes of the building performance . Sun cast was tested , daylight factors , CO2 emissions , thermal massing and cooling loads for the building in its base case and the efficient case . Analysis of the building efficiency was focusing on the amount of energy saving , to be more environmentally adaptable , and how passive strategies can reform the way of dealing with a building not only as a mass , but also as an envelope which will host users who challenges us to find their needs in the space and let feel relaxed within the range of the thermal comfort zones .
736 ZEMCH 2015 | International Conference | Bari - Lecce , Italy