Eren Soylu
Yalova University, Energy Systems Engineering, Graduate Student
- Renewable Energy, Thermodynamics, Climate Change, Environmental Engineering, Renewable Energy Systems, Energy and exergy based analysis in thermal systems, and 8 morePower and Energy Systems Engineering, Engineering, Applied Mathematics, Finite Element Methods, Energy Optimisation and Efficiency, Mathematical Modelling, Tidal energy, and ANSYS FLUENTedit
In this study, the use of R1234ze(E) refrigerant in an R134a-based mobile air-conditioning (MAC) system was experimentally investigated. Additionally, the effect of internal heat exchanger (IHX) on the performance of MAC was determined... more
In this study, the use of R1234ze(E) refrigerant in an R134a-based mobile air-conditioning (MAC) system was experimentally investigated.
Additionally, the effect of internal heat exchanger (IHX) on the performance of MAC was determined using R1234ze(E). Under the same
conditions, we have tested and compared two different cases that use R1234ze(E) with and without an IHX by taking the performance of
R134a as a reference. The inlet airflow temperatures of the evaporator and condenser were kept at 27 °C and 35 °C during the experiments,
respectively. Performance parameters were determined using energy and exergy analysis. Compressor power was reduced by an average of
19 %, and the COP of R1234ze(E) were increased by an average of 4 % after activating the IHX. Moreover, it was determined that the value of
exergy destruction of the system with R1234ze(E) was decreased by an average of 50 % when compared to R134a.
Additionally, the effect of internal heat exchanger (IHX) on the performance of MAC was determined using R1234ze(E). Under the same
conditions, we have tested and compared two different cases that use R1234ze(E) with and without an IHX by taking the performance of
R134a as a reference. The inlet airflow temperatures of the evaporator and condenser were kept at 27 °C and 35 °C during the experiments,
respectively. Performance parameters were determined using energy and exergy analysis. Compressor power was reduced by an average of
19 %, and the COP of R1234ze(E) were increased by an average of 4 % after activating the IHX. Moreover, it was determined that the value of
exergy destruction of the system with R1234ze(E) was decreased by an average of 50 % when compared to R134a.
Research Interests:
Bu çalışmada, düz bir yüzey üzerinden ısı transferinin, gerçek bir deney sistemi ve o sistemin bilgisayar ile tasarlanan modeli arasındaki farklılıkları açıklamak için bilgisayarlı benzetimi yapılmıştır. Bu amaçla, bir ısı transferi... more
Bu çalışmada, düz bir yüzey üzerinden ısı transferinin, gerçek bir deney sistemi ve o sistemin bilgisayar ile tasarlanan modeli arasındaki farklılıkları açıklamak için bilgisayarlı benzetimi yapılmıştır. Bu amaçla, bir ısı transferi teknik öğretim ekipmanı (Edibon Int., Madrid, İspanya) veri elde etmek ve hesaplama modeli geliştirmek için seçilmiştir. Elde edilen veriler aynı zamanda geliştirilen modelin bilgisayarlı benzetim sonuçlarını test etmek için kullanılmıştır. Bilgisayarlı benzetim çalışmaları COMSOL MP v5.1 benzetim programı ile gerçekleştirilmiştir. Elde edilen sonuçların, enerji sistemlerinde ve diğer ısı ile ilgili proseslerde ısı transferini daha iyi gösteren modelleri geliştirmek için bilgi sağlayacağı öngörülmektedir.
Anahtar Kelimler: Isı transferi, bilgisayarlı benzetim, modelleme.
DETERMINATION OF DISCREPANCIES BETWEEN EXPERIMENTALLY AND COMPUTATIONALLY OBTAINED HEAT TRANSFER DATA
Abstract: In this study, the simulation of heat transfer from a flat surface is carried out to elucidate discrepancies between a real experimental system and its computationally designed model. For this purpose, a technical teaching heat transfer equipment (Edibon Int., Madrid, Spain) is chosen to acquire data to develop computational model. The obtained data are also used to test the results of computational simulation of developed model. The computational simulations are done with COMSOL MP v5.1 simulation software. It is expected that the obtained results will provide knowledge to develop better models representing heat transfer in energy systems and in other heat related processes.
Anahtar Kelimler: Isı transferi, bilgisayarlı benzetim, modelleme.
DETERMINATION OF DISCREPANCIES BETWEEN EXPERIMENTALLY AND COMPUTATIONALLY OBTAINED HEAT TRANSFER DATA
Abstract: In this study, the simulation of heat transfer from a flat surface is carried out to elucidate discrepancies between a real experimental system and its computationally designed model. For this purpose, a technical teaching heat transfer equipment (Edibon Int., Madrid, Spain) is chosen to acquire data to develop computational model. The obtained data are also used to test the results of computational simulation of developed model. The computational simulations are done with COMSOL MP v5.1 simulation software. It is expected that the obtained results will provide knowledge to develop better models representing heat transfer in energy systems and in other heat related processes.
Research Interests:
Elektrik enerjisinin algısı; -maddesel bir nicelik olarak-, insan hissiyatıyla anlaşılması zordur. Enerjinin niteliğinin ve niceliğinin algısını günlük kullanımlarda insan hayatının bir parçası haline etirmek, enerjinin... more
Elektrik enerjisinin algısı; -maddesel bir nicelik olarak-, insan hissiyatıyla anlaşılması zordur. Enerjinin niteliğinin ve niceliğinin algısını günlük kullanımlarda insan hayatının bir parçası haline etirmek, enerjinin sürdürülebilirliği ve güvenilirliği konusunda büyük önem taşımaktadır. Enerji tasarrufu da bir çeşit enerji kaynağı olarak değerlendirilebilir. Bu algının insanların günlük hayatına oturtulması sebebiyle akıllı prizler enerjinin arzı, niteliği ve niceliği algısının oluşmasında büyük önem arz etmektedir.
Anahtar Kelimeler: Akıllı priz, arduino, güç, reaktif güç, faz farkı
Sense of electrical energy – as a material quantity- , is hard to define with human senses. The sense of quality and quantity of energy in daily life matters great importance as a part of human life. Energy effiency can be also interpreted as an energy source. Smart plugs are important equipments for making a new sense of energy which put in appearance of energy supply, quantity and quality.
Keywords: Smart plug, arduino, power, reactive power, phase difference
Anahtar Kelimeler: Akıllı priz, arduino, güç, reaktif güç, faz farkı
Sense of electrical energy – as a material quantity- , is hard to define with human senses. The sense of quality and quantity of energy in daily life matters great importance as a part of human life. Energy effiency can be also interpreted as an energy source. Smart plugs are important equipments for making a new sense of energy which put in appearance of energy supply, quantity and quality.
Keywords: Smart plug, arduino, power, reactive power, phase difference
Research Interests:
In refrigeration cycles evaporators are used to evaporate refrigerant fluid while absorbing heat from air passing through evaporator coils. The most important factors affecting the efficiency of evaporators may be counted as pressure... more
In refrigeration cycles evaporators are used to evaporate refrigerant fluid while absorbing heat from air passing through evaporator coils. The most important factors affecting the efficiency of evaporators may be counted as pressure drops, heat transfer rates, and superheat.
In order to keep pressure drops at lower levels and to maintain uniform refrigerant distribution in evaporators flow behavior of refrigerants in the distributors at the entrance of evaporators should be elucidated. Unfortunately with the current experimental techniques it is very difficult to directly analyze pressure gradients and flow profiles in the distributors. Therefore data related to understand flow behavior are needed in designing of the distributors. Thus, computational simulations may supply these data easily. However, there are many computational limitations to be dealt with such as presence of turbulent two-phase (liquid and gas) flow.
In the current study a well representation of turbulent flow in a distributor is tried to be obtained. And preliminary results are presented and discussed to reach the main goal.
In order to keep pressure drops at lower levels and to maintain uniform refrigerant distribution in evaporators flow behavior of refrigerants in the distributors at the entrance of evaporators should be elucidated. Unfortunately with the current experimental techniques it is very difficult to directly analyze pressure gradients and flow profiles in the distributors. Therefore data related to understand flow behavior are needed in designing of the distributors. Thus, computational simulations may supply these data easily. However, there are many computational limitations to be dealt with such as presence of turbulent two-phase (liquid and gas) flow.
In the current study a well representation of turbulent flow in a distributor is tried to be obtained. And preliminary results are presented and discussed to reach the main goal.
Research Interests:
Bu çalışmada durum - uzay fonksiyonu verilen bir sistemin transfer fonksiyonunun çıkarılması, bu transfer fonksiyonuna bağlı sistemin kararlılık analizi ve denetleyici tasarımı Matlab programı yardımıyla ve Laplace dönüşümleri... more
Bu çalışmada durum - uzay fonksiyonu verilen bir sistemin transfer fonksiyonunun çıkarılması, bu transfer fonksiyonuna bağlı sistemin kararlılık analizi ve denetleyici tasarımı Matlab programı yardımıyla ve Laplace dönüşümleri gerçekleştirilerek yapılmış, ilgili grafikler Matlab programı ile elde edilmiştir.
Research Interests:
Basınçlı hava sistemleri (pnömatik sistemler), endüstride yaygın olarak kullanılan ve enerji tüketiminin yüksek olduğu sistemlerdir. Bu sistemlerde enerji verimliliği çalışmaları, işletme kaleminde yüksek maliyetlere sebep olan enerji... more
Basınçlı hava sistemleri (pnömatik sistemler), endüstride yaygın olarak kullanılan ve enerji tüketiminin yüksek olduğu sistemlerdir. Bu sistemlerde enerji verimliliği çalışmaları, işletme kaleminde yüksek maliyetlere sebep olan enerji maliyetlerini düşürmeyi amaçlamakta, aynı zamanda tasarımdan kaynaklanan verimsiz enerji uygulamalarını ele almaktadır.
Research Interests:
Doğalgaz; yüksek yanma verimi, çevresel avantajları, oktan sayısının yüksek olması ile motor vuruntusunun az olması ve yüksek oranda hidrojen içermesinden dolayı ideal bir yakın olarak benzin, LPG ve motorinin yerini alabilecek... more
Doğalgaz; yüksek yanma verimi, çevresel avantajları, oktan sayısının yüksek olması ile motor vuruntusunun az olması ve yüksek oranda hidrojen içermesinden dolayı ideal bir yakın olarak benzin, LPG ve motorinin yerini alabilecek niteliktedir. Kullanım alanları o kadar geniş olmasada CO2 emisyonunun düşürülmesinde önemli bir rol üstlenebilir.