Yazar "Söylemez, Mehmet Sait" seçeneğine göre listele

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    A novel thermal analysis for cooking process in bulgur production: Design considerations, energy efficiency and wastewater diminution for industrial processes
    (Turk Isı Bilimi ve Teknigi Dernegi, 2020) Yilmaz, Ibrahim Halil; Söylemez, Mehmet Sait
    The main contribution of this study is to present a novel thermal model for analyzing the wheat cooking process and to propose a design procedure for an energy-efficient cooking pot. A small-scale cooking pot was designed and an experimental setup was installed to verify the model under various operating conditions. The developed model was solved using the Engineering Equation Solver software. Results were compared with those of the experiments and good agreement was obtained. Additionally, a computational fluid dynamics model was developed to verify the thermal model and have a useful design tool for large-scale cooking pots. It was found that the energy efficiency of the cooking process can be enhanced by initiating nucleate boiling (at ~5 °C minimum temperature difference between the heating element surface and saturation) which will supply the minimum heat flux on the helicoidal heat exchanger of the cooking pot. Lessening the energy demand but preserving the final product quality has decreased the 5-day biological oxygen demand of wastewater at least 50%. It is proposed that the wheat to water ratio can be reduced to 1.0?1.2 once the energy optimization and water recovery practices are satisfied. The estimated average specific energy consumption rate lies between 400-475 ±5% W/kg (thermal power supplied for one kilogram of wheat) which can be reduced ~25% further by reducing the wheat to water ratio to 1.0. The results reported in the present study are expected to guide thermal and food engineers for the design applications of industrial cooking pots, energy optimization with less harmful wastewater and process control strategies for cooking of wheat. © 2020 Turk Isı Bilimi ve Teknigi Dernegi. All rights reserved.
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    Öğe
    A NOVEL THERMAL ANALYSIS FOR COOKING PROCESS IN BULGUR PRODUCTION: DESIGN CONSIDERATIONS, ENERGY EFFICIENCY AND WASTEWATER DIMINUTION FOR INDUSTRIAL PROCESSES
    (2020) Yılmaz, Halil İbrahim; Söylemez, Mehmet Sait
    The main contribution of this study is to present a novel thermal model for analyzingthe wheat cookingprocessand to propose a design procedure for an energy-efficient cooking pot. A small-scale cooking potwas designed and an experimental setup was installed to verify the model under various operating conditions. The developed model was solved using the Engineering Equation Solversoftware. Results were compared with those of the experiments and good agreement was obtained. Additionally, a computational fluid dynamics model was developed to verify the thermal model and have a useful design toolfor large-scale cooking pots. It was found that the energy efficiency of the cookingprocesscan be enhanced by initiating nucleate boiling (at ~5 °C minimum temperature difference between the heating element surface and saturation) which will supplythe minimum heat flux on the helicoidal heat exchanger of the cooking pot. Lessening the energy demandbut preserving the final product quality has decreased the 5-day biological oxygen demand of wastewater at least 50%. It is proposed that the wheat to water ratio can be reduced to 1.0?1.2 once the energyoptimization and water recovery practices are satisfied. The estimated average specific energy consumption rate lies between 400?475 ±5% W/kg (thermal power supplied for one kilogram of wheat) which can be reduced ~25% further by reducing the wheat to water ratio to 1.0. The results reported in the present study are expected to guide thermal and food engineers forthe design applications of industrial cooking pots, energy optimization with less harmful wastewater and process control strategies for cooking of wheat
  • [ X ]
    Öğe
    Performance testing of a parabolic trough collector array for a small-scale process heat application
    (Turk Isı Bilimi ve Teknigi Dernegi, 2018) Yilmaz, Ibrahim Halil; Hayta, Hakan; Yumrutaş, Recep; Söylemez, Mehmet Sait
    This study presents the experimental investigation on performance testing of a parabolic trough solar collector (PTSC) array consisting of three modules connected in series. A new test setup has been proposed to test the thermal performance of this PTSC array in compliance with ASHRAE 93-1986 standard. The experimental tests have been carried out and monitored in a number of days under cloudless sky conditions in Gaziantep. In the performance analyses, the effects of beam radiation, collector inlet temperature, ambient conditions, and the variation in mass flow rate of the working fluid were investigated. The steady-state and dynamic tests of the PTSC array were performed. The efficiency tests were conducted with thermal oil for the temperature range from 50 °C to 200 °C, and mass flow rate of 0.1 kg/s to 0.5 kg/s under steady conditions. Additionally, the experimental results were compared with the results of the theoretical study made previously and gave good coherency. © 2018 TIBTD Printed in Turkey.
  • [ X ]
    Öğe
    PERFORMANCE TESTING OF A PARABOLIC TROUGH COLLECTOR ARRAY FOR A SMALL-SCALE PROCESS HEAT APPLICATION
    (2018) Yılmaz, İbrahim Halil; Hayta, Hakan; Yumrutaş, Recep; Söylemez, Mehmet Sait
    This study presents the experimental investigation on performance testing of a parabolic trough solar collector (PTSC) array consisting of three modules connected in series. A new test setup has been proposed to test the thermal performance of this PTSC array in compliance with ASHRAE 93-1986 standard. The experimental tests have been carried out and monitored in a number of days under cloudless sky conditions in Gaziantep. In the performance analyses, the effects of beam radiation, collector inlet temperature, ambient conditions, and the variation in mass flow rate of the working fluid were investigated. The steady-state and dynamic tests of the PTSC array were performed. The efficiency tests were conducted with thermal oil for the temperature range from 50 °C to 200 °C, and mass flow rate of 0.1 kg/s to 0.5 kg/s under steady conditions. Additionally, the experimental results were compared with the results of the theoretical study made previously and gave good coherency.