Master Degree / Yüksek Lisans Tezleri
Permanent URI for this collectionhttps://hdl.handle.net/11147/3008
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Master Thesis An Investigation of Transient Thermal Behaviors of Building External Walls(Izmir Institute of Technology, 2015) Pekdoğan, Tuğçe; Başaran, TahsinHeat transfer problem of the building opaque wall surfaces are highly important for providing thermal comfort for different climatic conditions and orientations. In this study, the insulation models with external, internal and center positioned insulation materials are parametrically analyzed regarding their time dependent thermal behaviors. One-dimensional time-dependent heat conduction equation is investigated by solving via implicit finite difference method for summer and winter climatic conditions; and north, south, east and west orientations. Meteorological data for Ankara, Erzurum, İstanbul and İzmir, which are cities with different climatic conditions, are used in these calculations. The results indicate that, sandwich wall insulated type gives more convenient results regarding the heating loads for winter and cooling loads for summer, for each investigated city and directions.Master Thesis Dynamic Energy and Exergy Analysis of an Existing Building in Iztech(Izmir Institute of Technology, 2013) Akdemir, Manolya; Başaran, TahsinPrimary objective of this thesis is to find out energy level of an existing building and investigate the opportunities in order to improve its energy level by retrofitting the envelope and using exergy analysis methods on alternative HVAC systems. To arrive at the objective, an existing building, Izmir Institute of Technology (IZTECH), Faculty of Architecture Block C, has been used as the case study. This building cannot comply with TS-825 standards (Turkish Standard Assessment) and energy efficiency parameters due to the building components and HVAC systems. According to the recorded outdoor climatic conditions, the building was modeled and simulated; and the retrofitting was tried in EDSL-TAS energy simulation software package. Simultaneously, exergy analyses for the situations before and after refurbishments were employed. Different from the most studies in the literature, this thesis carries out the exergy analyses using the dynamic data instead of the steady state ones. By the evaluation of these analyses together, energy level and the climatic comfort of the building have been seriously increased and the building’s loads have been decreased with ratio of 69.42% for heating system and 34.4% for cooling system after retrofitting. In exergy calculations, exergy efficiency of the system ranges between 2-14% with existing HVAC applications, 4-18% with Air Source Heat Pump (ASHP) and 8-21% with Ground Source Heat Pump (GSHP).