Person: KILIÇ, MUHSİN
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KILIÇ
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MUHSİN
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Publication Estimation of friction surface temperature of a dry clutch(Inderscience Enterprises Ltd, 2020-01-01) Çakmak, Tolga; Kılıç, Muhsin; KILIÇ, MUHSİN; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü; 0000-0003-2113-4510; O-2253-2015This paper presents an approach to estimate the temperature on the friction surface of a dry clutch. The study comprises both experimental measurements and transient thermal numerical analysis of heavy duty truck clutches for the successive engagements on a slope road. Compared to previous mathematical models in the literature; pressure plate surface convection coefficient, energy dissipation, engagement duration and variation of the clutch housing air temperature were obtained on the basis of experimental data and have been applied as input in the 3D clutch transient thermal finite element analysis. Simulation results show that the design of clutch plate has a significant effect on the temperature rise at the friction surface.Publication Comparative performance analysis of ORC-VCRC combined systems based on refrigerant selection(Taylor & Francis, 2021-01-01) Özdemir Küçük, Esra; Kılıç, Muhsin; ÖZDEMİR KÜÇÜK, ESRA; KILIÇ, MUHSİN; Bursa Uludağ Üniversitesi/Yenişehir İbrahim Orhan Meslek Yüksekokulu/Makine Bölümü.; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü.; 0000-0001-8146-0495; 0000-0003-2113-4510; AAG-6562-2021; O-2253-2015; IQW-0498-2023In this study, the combined power and refrigeration cycles driven by low-grade thermal energy are evaluated. An organic Rankine cycle (ORC) and a vapor compression refrigeration cycle (VCRC) are linked for both power generation and cooling. Three different combined cycle configurations are considered in the analyses. These are a basic ORC-VCRC, a dual-fluid basic ORC-VCRC, and a dual-fluid ORC-VCRC with an internal heat exchanger (IHE) and liquid-vapor heat exchanger (LVHE). The effects of the combined cycle configuration design on overall coefficients of performance (COPs) and the exergy efficiency of the system are examined. The highest overall COPs and exergy efficiency values at the operating conditions are obtained for the dual-fluid ORC-VCRC with IHE-LVHE as 0.72 and 19.5%, respectively. A comprehensive energy and exergy analysis is also performed for the dual-fluid ORC-VCRC with IHE-LVHE. The selection of the optimum fluid pair for ORC-VCRC is also investigated in the study. Thirty different fluid pair combinations are evaluated and compared using R123, R245fa, R600, R114, R141b, R290, R134a, and R143a refrigerants. The parametric analysis of the integrated system is performed depending on various operating conditions. Results show that the best performance among the cases considered is observed when the refrigerant R123 is used in the ORC-VCRC combined system.Publication Dual-separated cooling channel performance evaluation for high-power led Pcb in automotive headlight(Elsevier, 2021-06) Sevilgen, Gökhan; Kılıç, Muhsin; Aktaş, Mehmet; SEVİLGEN, GÖKHAN; KILIÇ, MUHSİN; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Otomotiv Mühendisliği Bölümü; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü; 0000-0002-7746-2014; 0000-0003-2113-4510; O-2253-2015; ABG-3444-2020In this paper, thermal and hydraulic analysis of a dual-separated cooling channel was performed for the cooling applications of different automotive lighting systems. A single LED and multi-LEDs were considered to evaluate the thermal and hydraulic performance as well as the lighting properties of automotive headlights. The detailed hydraulic analysis was theoretically evaluated for developing laminar flow to get higher thermal performance with less pumping power. The theoretical and simulation results for the dual-separated cooling channel were compared and discussed. Unlike the constant properties were used in the current literature, thermal analysis with temperature-dependent properties was performed to estimate Nusselt number preciously for dual-separated cooling channels. The temperature measurements were also performed in the experimental study to compare the numerical results. The light output parameter of the LEDs depends on junction temperature, it was found that the increase in light output by using a dualseparated cooling channel was about 10% for all cases. Otherwise, higher junction temperature values lead to a reduction in operating efficiency. The top copper surface temperature drop was higher than 50%, and the junction temperature had been reduced by 36% to ensure the desired operating conditions of the automotive lighting system.Publication Comparative performance evaluation of the mechanical and adsorption hybrid cooling systems for the cascaded and the serial connected evaporators configurations(Elsevier, 2021-09-22) Kılıç, Muhsin; Anjrini, Mustafa; KILIÇ, MUHSİN; Anjrini, Mustafa; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü.; 0000-0003-2113-4510; 0000-0003-1153-7631; O-2253-2015; DSX-5806-2022The goal of this study is to investigate comparatively the performance of an integrated cooling system comprised of an adsorption cooling cycle (ADC) and a vapor cooling cycle (VCC) with two different configurations, namely (cascaded and serial connected evaporators). The ADC chiller relies on the thermal compressor with two adsorption beds, which use three different adsorbents (RD silica gel, RD silica gel 2060, and silica gel- LiCl) and water (adsorbate) as a working pair separately. The thermal compressor operates by outside waste or solar-based thermal sources that have low-level temperatures below 100 degrees C. R152A was selected for the VCC chiller. This article pays particular attention to evaluating the ADC adsorbents and (ADC-VCC) connection configurations based on the first and second law of thermodynamics. The investigations have been implemented at different ADC evaporator temperatures. The effect of adsorption cycle time and ambient temperature on the overall coefficient of performance were also investigated and discussed for both configurations. Furthermore, the ADC and VCC coefficient of performances and the performance ratio (PR) were investigated at different ADC evaporator temperatures. The relation between the adsorbent mass and the cooling load was also discussed in this paper.Publication The investigation of the innovative hybrid heat pump system designed and prototyped for heating process of electric vehicles(Elsevier, 2023-01-25) Bayram, Halil; SEVİLGEN, GÖKHAN; KILIÇ, MUHSİN; Kılıç, Muhsin; Dursun, Harun; Başak, Enes; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Otomotiv Mühendisliği Bölümü.; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makina Mühendisliği Bölümü.; 0000-0002-7746-2014; 0000-0003-2113-4510; JPA-3189-2023; O-2253-2015In this paper, the investigation of the innovative hybrid heat pump system (HHPS) included Positive Temperature Coefficient (PTC) heater commonly used in electric vehicles (EVs) was performed in different heating modes to reach the desired temperature in a target time. The developed HHPS was evaluated in different heating modes in order to reach the desired temperature considering the both target time and also vehicle driving range. It was shown that the driving range can be increased up to 15 % by using HHPS. As a result, a high-capacity PTC heater and HP should be work together at the beginning of the heating, and then the PTC capacity should be reduced gradually at lower ambient conditions. Another important result is that HHPS represent a promising solution for the new generation EVs that the target temperature was obtained lower than 300 s at lower ambient conditions. A numerical model was also developed to investigate the flow and the thermal characteristics of the EV cabin interior that enable to design more effective heating, ventilation and air-conditioning (HVAC) systems of EVs under different environmental conditions and the numerical results were in good agreement with the experimental data used in this study.(c) 2023 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).Publication Experimental and numerical investigations on the thermal performance of three different cold plates designed for the electrical vehicle battery module(MDPI, 2023-10-01) Sevilgen, Gökhan; Dursun, Harun; Kılıç, Muhsin; SEVİLGEN, GÖKHAN; Dursun, Harun; KILIÇ, MUHSİN; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Otomotiv Mühendisliği Bölümü; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü; 0000-0002-7746-2014; 0000-0003-2113-4510; O-2253-2015; JPA-3189-2023; ABG-3444-2020The thermal performance of battery modules has a crucial role in the performance, safety, and lifetime of battery cells. Commonly, battery models are validated through experimental data to ensure the correctness of model behavior; however, the influences of experimental setups are often not considered in the laboratory environment, especially for prismatic cells such as lithium titanate oxide (LTO) battery cells used in electric vehicles. For this purpose, both experimental and numerical studies of the thermal performance of the battery module consisting of LTO cells was investigated using different cold plates used in electrical and hybrid vehicles. Three different discharging rates were applied to the battery module to obtain comparative results of the cooling performance. In the numerical simulations, heat generation models are typically used to observe the thermal behavior of the battery module; however, in the numerical study, dual potential multi-scale multi-domain (MSMD) battery models were used, with transient flow and heat transfer calculations performed. The numerical results were in good agreement with the experimental data. A new high-performance cold plate was developed for the thermal management of LTO battery cells. In comparison with the other two cold plate configurations, the proposed cold plate configuration dropped the maximum temperature up to 45% for the same operating conditions.Publication Liquid cooling performance of the single and multi led circuit boards used in automotive lighting systems(Ieee, 2019-01-01) Kılıç, Muhsin; Aktaş, Mehmet; Sevilgen, Gökhan; Perkovic, T.; Vukojevic, K.; Rodrigues, J. J. P. C.; Nizetic, S.; Patrono, L.; Solic, P.; KILIÇ, MUHSİN; SEVİLGEN, GÖKHAN; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü.; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Otomotiv Mühendisliği Bölümü.; Perkovic, T; Vukojevic, K; Rodrigues, JJPC; Nizetic, S; Patrono, L; Solic, P; 0000-0003-2113-4510 ; 0000-0002-7746-2014; O-2253-2015; ABG-3444-2020In this paper, the thermal performance of a liquid cooling block designed for automotive lighting components integrated with high power Light Emitting Diode (LED) was investigated, numerically and experimentally. Single and multi-chip on the printed circuit board (PCB) were selected to get comparative numerical results in view of temperature differences on PCB surfaces for automotive lighting systems. In the numerical simulations, three-dimensional Computational Fluid Dynamics (CFD) model with natural convection effects was developed for predicting temperature distributions of PCB surfaces. For this purpose, the single and multi 5-cell high power LED lighting system with cooling block design were modeled. On the other hand, the effect of the aspect ratio of cooling channel and block material on the thermal performance of circuit boards with single and multi-chip was also investigated numerically due to needing for weight reduction for automotive lighting applications. From the results, higher temperature gradients were measured and predicted near the LED chip due to the heat production of LEDs. Block material had little impact on the LED temperature but using different materials aid to reduce block weight for automotive application. From the comparison of the numerical data obtained for each PCB, the LED junction temperature was similar therefore same cooling block design can also be used for multi-LED chip applications for Automotive Lighting Systems. This Multi LED design using with liquid cooling block gives more opportunities for future head and rear lamp applications of vehicles.Publication Exergoeconomic analysis and multi-objective optimization of orc configurations via taguchi-grey relational methods(Cell Press, 2023-04-02) Küçük, Esra Özdemir; Kılıç, Muhsin; ÖZDEMİR KÜÇÜK, ESRA; KILIÇ, MUHSİN; Bursa Uludağ Üniversitesi/Yenişehir İbrahim Orhan Meslek Yüksekokulu/Makine Bölümü; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü; 0000-0001-8146-0495; 0000-0003-2113-4510; IQW-0498-2023; O-2253-2015Recovery of low-grade waste heat in industrial processes is an essential energy management topic. Yet, most low-temperature heat sources discharge their heat directly into the environment. The Organic Rankine Cycle (ORC), which has the benefits of being energy-efficient, enabling investment savings, and being ecologically friendly, is crucial in recycling energy from lowtemperature waste heat. Both the application of the optimum cycle design and the provision of optimum working conditions are the issues that need to be focused on efficiently using energy. This study performs the energy, exergy, and exergoeconomic analysis of four different organic Rankine cycle configurations operating with renewable or low grade waste heat. The effect degrees and ratios of selected control factors are calculated using Taguchi and variance analysis methods to compare thermal and exergy efficiencies, total system cost, and unit cost of electricity produced by the system. The objective function of the multi-objective optimization problem is defined, and its solution is realized with the Taguchi-Grey Relational Analysis method. The best thermodynamic and exergoeconomic performance result is calculated for the configuration of ORC with Feed Fluid Heater-Internal Heat Exchanger (IHE-FFH-ORC). As a result of Taguchi and ANOVA analysis, the factors that most affect the thermal efficiency of the system, the exergy efficiency, the total system investment cost, and the unit cost of the electricity produced are, respectively, the evaporation temperature (-50%), turbine efficiency (-25%), working fluid (-20%), subcooling (-4%), pump efficiency (-0.05%), and superheating (-0.05%). As a result of the optimization process, the thermal and exergy efficiencies, the total system cost and the unit cost of produced electricity for the IHE-FFH-ORC power system are calculated as 22.6% and 73.5%, 1.06 $/h, 0.039 $/kWh and 2.9 years, respectively.Publication Evaluation of combined thermal-mechanical compression systems: A review for energy efficient sustainable cooling(MDPI, 2022-11-01) Kılıç, Muhsin; KILIÇ, MUHSİN; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü; 0000-0003-2113-4510; O-2253-2015The aim of this study is to assess the state-of-the-art situation of mechanical compressors with thermal compressor systems in combined cooling systems and their ability to provide the required cooling effects with lower energy consumption than traditional cooling systems. The integrated systems have various advantages such as a broad temperature range, low energy consumption, and more flexibility in operating conditions. A comprehensive review of thermal-mechanical combined cooling systems is presented in terms of its principles, applications, different configurations, and various heat source systems. Two types of thermal compressor systems are included in this study. The first one is the absorption system that uses a liquid-vapor working pair in its thermodynamic cycle. Additionally, the second type is the adsorption system that utilizes a solid-vapor working pair in its thermodynamic cycle. It is concluded that continuing technological innovations are vital for sustainable cooling. Technological developments can lead to cooling that is both inexpensive and energy-efficient.