Dissertations/Theses - Department of Architecture

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    Study of hospital building envelope to facilitate passive cooling inside inpatient rooms in the context of Rajshahi, Bangladesh
    (Department of Architecture , BUET, 2017-03-25) Sabbir Ahsan, Md.; Ashikur Rahaman Joarder, Dr. Md.
    Depletion of biofuel at an increasing rate coupled with global warming give rise to the necessity of energy conservation as well as to search for alternative sources of energy. The particular importance on building is of pivotal importance because building on the face of planet is responsible for the consumption of almost half of the energy that is produced worldwide, most of which is used to maintain desired indoor artificial environment. The environment of Bangladesh alongside with the other parts of the world moving towards extremities. North-Western part of Bangladesh is worst case scenario in this aspect. Maintaining thermal comfort inside inpatient room using mechanical means is expensive, energy intensive, and thus impractical. Adding to this already miserable condition Bangladesh is not self-sufficient in energy sector. Considering all these factor, this research would made an attempt to facilitate passive cooling inside inpatient room in the context of Rajshahi (a district and division of Bangladesh) through parametric study of hospital building envelope. This research is a quantitative in nature. Literature review provided an overall frame work for the research, followed by field survey to obtain raw data and then OpenStudio plug-in in SketchUp was used to produce three dimensional model to simulate envelope condition for parametric study in EnergyPlus simulation engine. The findings indicate a correlation exists between building envelope condition and thermal comfort. Hence an opportunity to provide passive cooling is a possibility inside inpatient room of hospital building. It is expected that finding and expectation from this research for envelope condition will improve the thermal environment of inpatient room of hospital building and provide condition for thermal comfort to achieve the well-being of patients and the staff as well. It will also help in conserving energy for cooling purpose.
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    Study on the potential of light wells in deep plan readymade garments factory buildings in Dhaka
    (Department of Architecture , BUET, 2017-07-24) Razia, Sultana; Ashikur Rahaman Joarder, Dr. Md.
    Ready-made garments (RMG) factories are playing a vital role in the economy of Bangladesh, supported by the labour of the workers who spent major part of day time in the RMG factory buildings and engaged in different types of works, such as cutting, sewing, ironing and packing. In general, because of poor visual environment of RMG factories, the workers often feel discomfort and health problems that impact on productivity. The aim of this research is to develop architectural design strategies to incorporate light well in RMG factory buildings to improve luminous environment in context of Dhaka. To incorporate light well in the RMG buildings, effectively, simulation analysis was done to identify sensible location of light well in the building, define physical parameters of light well spaces and refine light well configurations. In this research DAYSIM, that use dynamic Climate-Based Daylight Modelling (CBDM) method was used to calculate Daylight Autonomy (DA), Maximum Daylight Autonomy (DAmax), Useful Daylight Illuminance (UDI) and annual illumination profile for the selected case RMG building. DAYSIM use RADIANCE (backward) raytracer combined with a daylight coefficient approach considering Perez all weather sky luminance models. ECOTECT was used as the modelling interface to launch DAYSIM program. The findings show that the square shaped north oriented semi-enclosed light well proportion of 1:12 with respect to the volume of a six story RMG building, perform better to enhance visual quality into the interior space compared to other studied configurations, locations and proportions of light well. It is expected that the outcome of this research will help architects and designers to incorporate light well in RMG buildings to enhance the interior lighting quality of the RMG factories in the context of Dhaka, that will also improve the productivity of workspace.