Termal analizde kinetik parametrelerin belirlenmes için yazılım geliştirlmesi.

In this thesis, a new software, THERA-Kinetics was developed for the evaluation of kinetic parameters using non-isothermal data. Different computational methods, available in the software, were applied to a set of experimental and simulated data distributed in the ICTAC (International Confederation for Thermal Analysis and Calorimetry) Kinetics Project. The reliability of the software was verified by comparing the kinetic results, which were in good agreement, with those obtained by the participants of the ICTAC Kinetics Project. It was also within the scope of this study to examine the combustion characteristics and kinetics of three same origin coal samples. A series of thermogravimetry (TG) and differential scanning calorimetry (DSC) measurements were carried out in non-isothermal conditions at heating rates of 5, 10 and 15 K/min. Reaction regions, peak and burn-out temperatures, weight loss percentages and heat of reactions of the samples were determined for each heating rate from TG and DSC curves. A variety of computational methods, available in the software developed, were applied to experimental data for the evaluation of the kinetic parameters of the coal samples. It was observed that there was no general trend in the activation energy values from the point of heating rate.M.S. - Master of Scienc

Flow Testing of Balcova Geothermal Field Turkey

Balçova geothermal field is located in a densely populated area which makes direct heat applications very efficient and economical. Heat produced from Balçova geothermal field is utilized for three main purposes: greenhouse heating, balneology and residential heating. Among these three applications, the latter one is the main application throughout the Balçova District Heating System. The field produces hot water from two different horizons: one shallow and one deeper zone. After had utilized for 16 years, few wellbores in the deeper zone had to be abandoned because of operational difficulties, and new wellbores were drilled in the same zone. Interference tests were carried out during flow testing at newly drilled wellbores. Analysis of pressure response at observation wellbores for production/injection practices indicated that there exists a very strong connection within the wellbores in the same zone. In addition, there exists also a hydraulic but weaker connection between shallower and deeper zones. Response of the field and the operational changes in production/injection applications are also presented