Person: KILIÇ, MUHSİN
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KILIÇ
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MUHSİN
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Publication A novel design of a dry clutch pressure plate for weight reduction without compromising its thermo-mechanical performance(Inderscience Enterprises, 2022-01-01) Çakmak, Tolga; Kılıç, Muhsin; KILIÇ, MUHSİN; Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü; 0000-0003-2113-4510; O-2253-2015The main objective of this study is to conduct an experimental research to investigate the effect of ventilation channels which have never been practised into the conventional automotive clutch pressure plate before. The purpose is to reduce its weight without compromising its thermo-mechanical performance. Both convective and conductive heat transfers of the clutch pressure plate have been enhanced in order to meet thermo-mechanical performance requirements, by ventilation channels and by chemical composition adjustment, respectively. The novel design ventilated o430 size clutch pressure plates comprising different metallurgical structures have been experimentally investigated and compared with that of the conventional non-ventilated version. The results of this research have shown that it is feasible to reduce the clutch pressure plate weight by 28% without compromising its thermo-mechanical performance. Thus, the weight reduction of the heaviest component of the clutch system would also help to meet greenhouse gas emissions policies of the vehicles.Publication Numerical simulation and analytical evaluation of the collection efficiency of the particles in a gas by the wire-plate electrostatic precipitators(MDPI, 2022-07-01) Kılıç, Muhsin; Mutlu, Mustafa; Altun, Ayşe Fidan; KILIÇ, MUHSİN; MUTLU, MUSTAFA; ALTUN, AYŞE FİDAN; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü; Bursa Uludağ Üniversitesi/Yenişehir İbrahim Orhan Meslek Yüksekokulu; Bursa Uludağ Üniversitesi/Orhangazi Yeniköy Asil Çelik Meslek Yüksekokulu; 0000-0003-2113-4510; 0000-0001-7236-8398; 0000-0001-6816-8377; O-2253-2015; ABB-9566-2020; AAA-2005-2022In this study, a numerical simulation model and an analytical method are introduced to evaluate the particle collection efficiency and transport phenomena in an electrostatic precipitator (ESP). Several complicated physical processes are involved in an ESP, including the turbulent flow, the ionization of gas by corona discharge, particles' movement, and the displacement of electric charge. The attachment of ions charges suspended particles in the gas media. Then, charged particles in the fluid move towards the collection plate and stick on it. The numerical model comprises the gas flow, electrostatic field, and particle motions. The collection efficiency of the wire-plate type ESP is investigated for the particle diameter range of 0.02 to 10 mu m. It is observed that electric field strengths and current densities show considerable variation in the solution domain. Meanwhile, changing supply voltage and charging wire diameters significantly affect the acquired charges on the electrostatic field and particle collecting efficiencies. Simultaneously, the distance between the charging and collecting electrodes and the main fluid inlet velocity has an important effect on the particle collection efficiency. The influence of the different ESP working conditions and particle dimensions on the performance of ESP are investigated and discussed.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 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 Comprehensive thermodynamic performance evaluation of various gas liquefaction cycles for cryogenic energy storage(Mdpi, 2023-12-01) KILIÇ, MUHSİN; ALTUN, AYŞE FİDAN; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makina Mühendisliği Bölümü.; 0000-0003-2113-4510; 0000-0001-7236-8398; O-2253-2015This paper conducts comparative thermodynamic analysis and performance evaluations of various gas liquefaction configurations. The four most common liquefaction systems (Linde-Hampson, Kapitza, Heylandt, and Claude) were considered. The isothermal and multi-stage isentropic compression processes were evaluated and compared as actual compression processes. Thermodynamic evaluation is based on the energy required to compress a unit mass of gas, the liquefied air mass flow rate, and the exergetic efficiency. The modeling results show that three-stage compression cycles retain lower energy requirements. Increasing the compression stage from one to two for all the processes decreases the energy requirement by 34 to 38%. Changing the compression stage number from two to three reduces the energy requirement by 13%. The compression pressure and expander flow rate ratio significantly affect the liquefied air mass flow rate. Hence, a parametric analysis was conducted to obtain the best operating conditions for each considered cycle. Depending on the compression pressure, the optimum expander flow rate values of the Claude, Kapitza, and Heylandt cycles change from 0.65 to 0.5, 0.65 to 0.55, and 0.35 to 0.30, respectively. For the optimum cases, the Claude, Kapitza, and Heylandt cycles result in liquid yields that are about 2.5, 2.2, and 1.6 times higher than that of the Linde-Hampson cycle. The Claude cycle is the best operating cycle for all the considered performance metrics. Moreover, the performances of the Linde-Hampson and Claude cycles are investigated for various gases. Under the same operating conditions, the results show that better performance parameters are obtained with the gases that have relatively high normal boiling temperatures.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 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.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 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 Thermodynamic analysis of basic and regenerative organic rankine cycles using dry fluids from waste heat recovery(Yildiz Technical Univ, 2018-07-01) Özdemir, Esra; ÖZDEMİR, ESRA; Kılıç, Muhsin; KILIÇ, MUHSİN; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Makina Mühendisliği Bölümü.; Bursa Uludağ Üniversitesi/Yenişehir İbrahim Orhan Meslek Yüksekokulu.; 0000-0001-8146-0495; 0000-0003-2113-4510; IQW-0498-2023; AAG-6562-2021; O-2253-2015The organic Rankine cycle (ORC), which generates electric energy using low temperature heat sources, is a promising technology in energy production sector. The ORC, which uses an organic fluid with its lower boiling point and higher vapor pressure than water-steam as a working fluid. The thermal efficiency of an ORC showes the performance of system, depends on system compenents, working fluid and operating conditions. This paper presents an thermodynamics examination of basic ORC and regenerative ORC for waste heat recovery applications using dry organic fluids. R113, R114, R227ea, R245fa and R600a with the boiling points from -16 degrees C to 48 degrees C are selected in the analyses. The relationships between the ORC's performance parameters for basic and regenerative technologies and the properties of working fluids are evaluated based on various turbine inlet pressure values. Results show that regenerative ORC has higher thermal efficiency compared with basic ORC. Also, the thermal efficiency increases with the increment of the turbine inlet pressure for both basic ORC and regenerative ORC.