1924

Saf Metanolün Kullanıldığı Buji Ateşlemeli Bir Motorda Sıkıştırma Oranının Performans, Yanma Karakteristiği ve Emisyonlar Üzerine Etkisi

Ekosistem ve maliyet açısından benzine alternatif olabilecek yakıtların buji ateşlemeli motorlarda kullanılması günümüzde oldukça önemli hale gelmiştir. İçinde bulunduğumuz bu durum, geliştirilen yeni teknolojiler ile birçok kaynaktan üretilebilen metanol gibi alternatif yakıtların kullanımının araştırılmasına neden olmuştur. Metanolün motorlarda daha verimli kullanılabilirliğini araştırmak için yapılan bu çalışmada, sıkıştırma oranının (SO) performans ve egzoz emisyonları üzerine etkileri incelenmiştir. Tek silindirli buji ateşlemeli bir motorun kullanıldığı deneylerde değişken olarak dört farklı sıkıştırma oranı (8,0:1, 8,5:1, 9,0:1 ve 9,5:1) tercih edilmiştir. Bütün motor deneyleri, tam yük, 2400 d/d sabit motor hızı ve 1,0 sabit hafa fazlalık katsayısında gerçekleştirilmiştir. Deneylerden elde edilen veriler ile motor performansı ve egzoz emisyon karakteristikleri çıkarılmıştır. Elde edilen sonuçlar motorun orijinal çalışma parametrelerinde benzinden elde edilen verilerle kıyaslanmıştır. Sonuçlara göre, saf metanol kullanımında, SOnun artması ile birlikte özgül enerji tüketimi (ÖET) ve özgül yakıt tüketiminin (ÖYT) azaldığı, ortalama efektif basınç (OEB) ve ısıl verimin (ISV) ise arttığı gözlemlenmiştir. Ayrıca, bütün SOlarda metanol kullanımının benzine göre OEByi, ÖYTyi, silindir gaz basıncını (SGB) ve ISVyi yükselttiği, ÖETyi ise düşürdüğü tespit edilmiştir. Aynı zamanda, metanol kullanımının benzine kıyasla egzoz emisyonlarını bütün SOlarda genel olarak iyileştirdiği gözlemlenmiştir.

The Effect on Performance, Combustion Characteristic and Exhaust Emissions of Compression Ratio in an SI Engine Fuelled Pure Methanol

The using of fuels which can be alternative to gasoline in a spark ignition engine is gained fairly important with respect to environment and cost of the fuels. This situation has led the investigation of the use of alternative fuels such as methanol, which can be produced from many sources with the new technologies developed. In this study which has been done for investigating the more efficient usability of methanol has been examined the effect on engine performance and exhaust emission of compression ratio (CR). In the tests were used SI engine, which was a single cylinder and air-cooled. In the experiments were preferred four different CRs (8.0:1, 8.5:1, 9.0:1 and 9.5:1). All experiments were conducted with a wide-throttle opening, the constant engine speed of 2400 rpm and constant excess air ratio (1.0). With the obtain results from the tests, it has been presented in engine performance and exhaust emission characteristic and is compared to obtained values from unleaded gasoline at original engine parameters. As a result, with an increasing CR, it is observed that the brake mean effective pressure (BMEP), brake thermal efficiency (BTE) increased while decrease brake specific energy consumption (BSEC) and brake specific fuel consumption (BSFC) at the use of pure methanol. Also, it was shown that the BMEP, BTE, inlet cylinder gas pressure and BSFC were generally increased while decreased BSEC obtained with the use of methanol at all CRs when they were compared to those of gasoline.

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1. Balki, M.K., Sayin, C., 2014, The Effect of Compression Ratio on The Performance, Emissions And Combustion of an SI (Spark Ignition) Engine Fueled With Pure Ethanol, Methanol and Unleaded Gasoline, Energy ,71,194-01
2. Gao, J., Jiang, D., Huang, Z., 2007, Spray Properties of Alternative Fuels: A Comparative Analysis of EthanolGasoline Blends and Gasoline, Fuel, 86, 16451650
3. Yücesu, H.S., Sözen, A., Topgül, T., Arcaklıoğlu, A., 2007, Comparative Study of Mathematical And Experimental Analysis of Spark Ignition Engine Performance Used Ethanol-Gasoline Blend Fuel, Applied Thermal Engineering, 27, 358-368
4. Al-Baghdadı, M.A.R.S., 2006, A Simulation Model For A Single Cylinder Four-Stroke Spark Ignition Engine Fueled With Alternative Fuels, Turkish Journal of Engineering and Environmental Science, 30, 331-350
5. Nazzal, I.T., 2011, Experimental Study Of Gasoline-Alcohol Blends on Performance of Internal Combustion Engine, European Journal of Scientific Research, 52(1), 16-22
6. Çelik, M.B., Özdalyan, B., Alkan, F., 2011, The Use of Pure Methanol As Fuel At High Compression Ratio in a Single Cylinder Gasoline Engine, Fuel, 90, 1591-1598
7. Eyidoğan, M., Çanakçı, M., Özsezen, A.N., Alptekin, E., Türkcan, A., Kılıçaslan, İ., 2011 Investigation of The Effect, of Ethanol-Gasoline and Methanol-Gasoline Blends on The Combustion Parameters And Exhaust Emissions of a Spark Ignition Engine, Journal of the Faculty of Engineering and Architecture of Gazi University, 26(3), 499-507
8. Shayan, S.B., Seyedpour, S.M., Ommi, F., Moosavy, S.H., Alizadeh, M., 2011, Impact of MethanolGasoline Fuel Blends on The Performance And Exhaust Emissions of a SI Engine, International Journal of Automotive Engineering, 1(3), 219-227
9. Shenghua, L., Hui, L., Shengchun, L., Clemente E.R.C., Donghui, Q., 2006 Effects of MethanolGasoline Blend on Gasoline Engine Performance And Emissions, Journal of Xi'an Jiaotong University
10. Al-Dawood, A.M., 1998, Effect of Blending MTBE, Methanol, or Ethanol With Gasoline on Performance And Exhaust Emissions of SI Engines, Master of Science in Mechanical Engineering, King Fahd University of Petroleum&Minerals, Dhahran, Saudi Arabia, UMI Number: 1398014
11. Erenonal, R., Özgören, Y.Ş., 2014 Buji Ateşlemeli Motorlarda Etanol-Benzin, Mtbe-Benzin ve Methanol-Benzin Karışımlarının Motor Performansı ve Egzoz Emisyonlarına Etkisi, Makine Teknolojileri Elektronik Dergisi, 11(1), 11-22
12. Sugözü, İ., Deniz, T., Mutlu, İ., 2009, Buji Ateşlemeli Bir Motorda Sıkıştırma Oranının Motor Performansı ve Egzoz Emisyonlarına Etkisi, Taşıt Teknolojileri Elektronik Dergisi, 1(1), 17-24
13. Vancoillie, J., Verhelst, S., 2010, Modeling the Combustion of Light Alcohols in SI Engines: A Preliminary Study, FISITA 2010 World Automotive Congress, Budapest, Hungary, 1-12
14. Fuel properties. www.merckmillipore.com/chemicals/all-products , [erişim tarihi: 12.06.15]
15. Borat, O., Sürmen, A., Balcı, M., 1992, İçten Yanmalı Motorlar, Gazi Üniversitesi Teknik Eğitim Fakültesi vakfı yayınları, Ankara
16. Balki, M.K., Sayin, C., Canakci, M., 2014, The Effect of Different Alcohol Fuels on The Performance, Emissions and Combustion Characteristic of a Gasoline Engine, Fuel, 115, 901-906
17. Cassady, P.E., 1976, The Use of Methanol As a Motor Vehicle Fuel, Symposium on Alternate Fuel Resources, March 25-27, Vandenberg, California, American Institute of Aeronautics and Astronautics, 257-272.
18. Aiana, T., Folayan, C.O., Pam, G.Y., 2012, Influence of Compression Ratio on The Performance Characteristics of a Spark Ignition Engine, Advances in Applied Science Research, 3(4), 1915-1922
19. Farkade, H.S., Pathre, A.P., 2012, Experimental Investigation of Methanol, Ethanol and Butanol Blends With Gasoline on SI Engine, International Journal of Emerging Technology and Advanced Engineering, 2(4), 205-215
20. Pourkhesalian, A.M., Shamekhi, A.H., Salimi, F., 2009, Performance and Emission Comparison and Investigation of Alternative Fuels in SI Engines, SAE paper, 2009-01-0936
21. Pourkhesalian, A.M., Shamekhi, A.H., Salimi F., 2010, Alternative Fuel and Gasoline in an SI
Engine: a Comparative Study of Performance and Emissions Characteristic, Fuel, 89, 1056-1063 22. Ebersole, G.D., Manning, F.S., 1972, Engine Performance and Exhaust Emissions: Methanol Versus Isooctane, SAE paper, 720692
23. Gümüş, M., 2011, Effects of Volumetric Efficiency on the Performance and Emissions Characteristic of A Dual Fueled (Gasoline and LPG) Spark Ignition Engine, Fuel Processing Technology, 92, 1862-1867
24. Sekmen, Y., Erduranlı, P., Gölcü, M., Salman, M.S., 2005, Buji Ateşlemeli Motorlarda Sıkıştırma Oranı Değişiminin Performans Parametrelerine Etkisi, Mühendislik Bilimleri Dergisi, 11(1), 23-30
25. Çelik, M.B., Balcı, M., 2002, Sabit Yük ve Hız Şartlarında Sıkıştırma Oranının Motor Karakteristiklerine Etkisi, Teknoloji, 5(3-4), 39-45
26. Salman, M.S., 1996, Buji Ateşlemeli Motorlarda Yanma Hızının Performansa Etkileri, Doktora Tezi, Gazi Üniversitesi, Fen Bilimleri Enstitüsü, Ankara, Türkiye
27. Bilgin, A., Sezer, İ., 2008, Effect of Methanol Addition to Gasoline on The Performance and Fuel Cost of a Spark İgnition Engine, Energy&Fuel, 22, 2782-2788
28. Ergeneman, M., Kutlar, A., Mutlu, M., Arslan, H., 1998, Taşıt Egzozundan Kaynaklanan Kirleticiler, Birsen Yayınevi, İstanbul, Türkiye
29. Heywood, J.B., 1988, Internal Combustion Engine Fundamentals, McGraw-Hill Book Co., USA
30. Sekmen, Y., Sekmen, P., Salman, M.S., 2007, The Effect of Compression Ratio on Engine Performance and Exhaust Emission in a Spark Ignition Engine, Journal of the Faculty of Engineering and Architecture of Gazi University, 22(4), 745-751
31. Topgül, T., Yücesu, H.S., Okur, M., 2005, The Experimental Investigation of The Effects of Operating Parameters on Exhaust Emissions on a Spark Ignition Engine, Journal of Polytechnic, 8(1), 43-47
32. Yaman, H., Çelik, M.B., 2004, Benzinli Motorlarda Egzoz Emisyonlarına Etki Eden Faktörlerin Deneysel Olarak İncelenmesi, Teknoloji, 7(4), 681-691
33. Krishna, M.M.S.V., Kishor, K., 2008, Performance of Copper Coated Spark Ignition Engine with Methanol-Blended Gasoline with Catalytic Converter, Journal of Scientific & Industrial Research, 67, 543-548
34. Zhao, H., Ge, Y., Tan, J., Yin, H., Guo, J., Zhao, W., Dai, P., 2011, Effects of Different Mixing Ratios on Emissions from Passenger Cars Fueled with Methanol/Gasoline Blends, Journal of Environmental Sciences, 23(11), 1831-1838
35. Lio, S.Y., Jiang, D.M., Cheng, Q., Huang, Z.H., Zeng, K., 2006, Effect of Methanol Addition into Gasoline on the Combustion Characteristics at the Relatively Low Temperatures, Energy&Fuels, 20, 84-90
36. Kumar, C.R., Nagarajan, G., 2009, Investigation of Aldehyde Emission from an Alcohol Fueled SI Engine, Journal of Environmental Research and Development, 3(3), 685-694.