Makine ve Metal Teknolojileri Bölümü
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Item EXERGO ECONOMIC ANALYSIS OF THE GROUND SOURCE HEAT PUMP FOR COOLING SEASONS IN THE MARDIN PROVINCE(Yıldız Technical University, 2014) ÜNAL, Fatih; TEMİR, GalipNowadays, the effective and efficient use of energy has become an indispensable necessity due to energy sources gradually are decreasing and energy prices are increasing. In this study the experimental results of vertical type ground source heat pump pump for cooling seasons for a test site which is 120 m2 experimental ground area in Midyat/Mardin. After examining the results of studies energy, exergy and eksergo economic analysis was performed over the system. According to the analysis of the system it was determined that the compressor cooling process is of 3,704 kW best heat loss, 1.6539 kW the highest exergy loss, 0.4658 $/h and cost rate associated with capital investment, 0.7464 $/h and the high cost of exergy, exergy loss 44,72% rate of 38.43% and values eksergo economic factors. For this reason, it is inevitable that the planned improvements should be carried out primarily compressor. As a result; our system is quite effective in both reduce energy consumption and reducing greenhouse gas emissions.Article Lpg Yakıtlı Endüstriyel Yatay Tip Mısır Kurutma Tesisinin Enerji ve Maliyet Analizi(Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi, 2020) Ünal, Fatih; Bulut, Hüsamettin; Kahraman, AhmetBu çalışmada kurutma havasının ısıtılmasında LPG kullanılan yatay tip mısır kurutma tesisinin kurutma odasına farklı kurutma havası giriş sıcaklıkları ile elde edilen sonuçlara bağlı olarak enerji ve maliyet analizleri yapılmıştır. Kurutma sürecinde, sisteme sabit hava debisinde farklı sıcaklıklarda (85°C, 90°C ve 95°C) kurutma havası gönderilerek belirlenen düğüm noktalarında sıcaklık(°C), bağıl nem(%) ve hava hızı(m/s) ölçülmüştür. Sistemde belirlenen 6 adet düğüm noktasından elde edilen verilere bağlı olarak yapılan enerji ve maliyet analizinde kurutma havası giriş sıcaklığı, ısıtıcı giriş havasının sıcaklığı ve bağıl nem değişimlerinin yakıt sarfiyatı, enerji verimliliği ve birim kurutma maliyet üzerindeki etkileri değerlendirilmiştir. Sonuç olarak, kurutma giriş havası sıcaklığının artmasının enerji verimliliğini düşürdüğü, birim kurutma maliyetini ve yakıt sarfiyatını artırdığı tespit edilmiştir. Isıtıcı giriş havasının bağıl neminin artması ile yakıt sarfiyatının ve birim kurutma maliyetinin arttığı ve enerji verimliliğinin düştüğü tespit edilmiştir.Item Thermodynamic Analysis of Cooling with Vertical Type Ground Source Heat Pump: Mardin Case Study(International Knowledge Sharing Platform, 2017) ÜNAL, Fatih; TEMİR, GalipIn this study, for experimental area with a ground area of 120 m2 determined in district Midyat of province Mardin in the hot climate zone of Turkey, analysis of energy and exergy are applied to the system by investigating the results of experimental studies for the cooling season of vertical type ground source heat pump integrated with fan coil system. Instant data records were taken in the cooling process (01.07.2013 / 31.10.2013) for the 11 node points determined in the installed system. In the analysis of experimental data through immediate data recording, the COP value of the system was 3.70, the energy loss was 3,125 kW, the loss of exergy was 3,698 kW, the energy efficiency was 83.88% and the second law efficiency was 21.31%. In the cooling season, the element that works with the least energy efficiency in the system and the loss of highest exergy is designated as compressor. In this context, it has been determined that priority should be given to compressor for improvement studies to be considered. As a result, it has been determined that the use of vertical type ground source heat pump system for cooling purposes is suitable for Mardin Province.Item Thermodynamic Analysis of Heating with Solar Assisted Vertical Type Ground Source Heat Pump: Mardin Case Study(International Knowledge Sharing Platform, 2017) ÜNAL, FatihIn this study, for experimental area with a ground area of 120 m2 determined in district Midyat of province Mardin in the hot climate zone of Turkey, analysis of energy and exergy are applied to the system by investigating the results of experimental studies for the heating season of solar assisted vertical type ground source heat pump integrated with fan coil system. Solar energy is used with the aim of sustaining the heat pump system. Instant data records were taken in the heating process (01.10.2013 / 31.03.2014) for the 14 node points determined in the installed system. In the analysis of experimental data through immediate data recording, the COP value of the system was 3.61, the energy loss was 8.9952 kW, the loss of exergy was 6.2673 kW, the energy efficiency was 64.52% and the second law efficiency was 24.51%. In the heating season, solar energy's rate of meeting energy need of the heat pump system was found to be 9.75%. The elements with the most loss of exergy in the system are designated as collectors and compressors. In this context, it has been determined that priority should be given to compressor for improvement studies to be considered. As a result, it has been determined that the system examined for Mardin Province is appropriate.Article Tunçbilek Termik Santralinin Ekserji Analizi(Tesisat Mühendisliği Dergisi, 2014) ÜNAL, Fatih; ÖZKAN, Derya BurcuBu çalışmada Türkiye’de çalışmakta olan Tunçbilek Termik Santrali, ünite ekipmanlarının her birinin termodinamik analizi yapılarak değerlendirilmiştir. Termik santral ünitesinde belirlenen yirmi yedi düğüm noktasının termodinamik özelliklerine bağlı olarak enerji ve ekserji değerleri hesaplanmıştır. Bulunan sonuçlar ile ekipmanların ayrı ayrı enerji ve ekserji dengeleri kurularak ortalama kayıp ve tahrip olan enerji ve ekserjiler hesaplanmış, kayıp enerji oranı ve yok olan ekserji oranı bulunmuştur. Çalışmanın sonuçları grafik olarak verilmiştir. Buna göre, en yüksek enerji kaybı oranı ve en yüksek ekserji kaybı oranı olan ekipman sırasıyla %71,1 ve %79,5 ile kazan olarak bulunmuştur. Elde edilen termodinamik özellikler yardımıyla Termik Santral’in ısıl ve ikinci yasa verimleri sırasıyla %32,3 ve %75,1 olarak bulunmuştur.