Numerical analysis of the journal bearings of Keban Hydroelectric Power Plant using different type nanofluids
Öz
Energy production in line with demand rapidly increases. Fossil fuel systems in use today pose a great threat to the future of the world and in this sense, the interest to the renewable energy sources such as hydroelectric energy systems is increasing. In this study, the heating problem of the journal bearings one of the parts of the hydroelectric energy systems was evaluated, various analysis were performed with the Computational Fluid Dynamics (CFD) approach to eliminate this problem and the results obtained were shared. Initial analyses were performed and evaluated for Mobil DTE 68 oil, which was commonly used as a refrigerant in journal bearings. Then, Al2O3 nanoparticles at concentrations of 3%, 7% and 10% were then added to the refrigerant oil and necessary analyses were performed for these three conditions. Finally, similar analyses were performed in the 3%, 7% and 10% concentration for SiO2. When the obtained temperature changes were examined accordingly, it was obtained that the increase in the concentration of nanoparticles exhibited a characteristic that was inversely proportional to the surface temperature. With the addition of nanoparticles, surface temperatures have been observed to decrease from 80°C to 68°C, but the effect on sharp corners is quite low. In this sense, it has been obtained that nanoparticles can significantly increase the thermal characteristics of Mobil DTE 68 oil, and it has been concluded that nanofluids may be an alternative solution for the overheating problem that occurs in journal bearings.
Anahtar Kelimeler
Nanofluids Computational fluid dynamics (CFD) Heat transfer Journal bearings Hydroelectric power plants
Etik Beyan
The authors of the paper submitted declare that nothing which is necessary for achieving the paper requires ethical committee and/or legal-special permissions.
Destekleyen Kurum
EÜAŞ
Proje Numarası
202308
Teşekkür
This study was supported by YÖK-EÜAŞ Cooperation, Energy Academy Programme (Project No: 202308).
Kaynakça
- [1] Oliveira MVM, Daniel GB. Vibrational signature of journal bearing oil starvation considering thermal effects and rotor unbalance variation. Tribology International 2024; 191: 109132.
- [2] Singh V, Rajput AK. Piezo-viscous-polar lubrication of hybrid conical journal bearing with slip boundary conditions. Tribology International 2024; 109298.
- [3] Akkaya M, Menlik T, Sözen A, Gürü M. Experimental investigation of nanolubricant usage in a cooling system at different nanoparticle concentrations. Heat Transfer Research 2020; 51(10): 949–965.
- [4] Sözen A, Variyenli HI, Özdemir MB, Gürü M. Upgrading the thermal performance of parallel and cross-flow concentric tube heat exchangers using MgO nanofluid. Heat Transfer Research 2017; 48(5): 419–434.
- [5] Chen M, He Y, Zhu J, Wen D. Investigating the collector efficiency of silver nanofluids based direct absorption solar collectors. Applied Energy 2016; 181: 65-74.
- [6] Sözen A, Gürü M, Menlik T, Karakaya U, Çiftçi E. Experimental comparison of triton x-100 and sodium dodecyl benzene sulfonate surfactants on thermal performance of TiO2–deionized water nanofluid in a thermosiphon. Experimental Heat Transfer 2018; 31(5): 450-469.
- [7] Ozdemir MB. Ergun ME. Experimental and numerical investigations of thermal performance of Al2O3/water nanofluid for a combi boiler with double heat exchangers. International Journal of Numerical Methods for Heat & Fluid Flow 2019; 29(4): 1300-1321.
- [8] Afzal S, Qayyum M, Akgül A, Hassan AM. Heat transfer enhancement in engine oil based hybrid nanofluid through combustive engines: An entropy optimization approach. Case Studies in Thermal Engineering 2023; 52: 103803.
- [9] Du W, Ma J, Wang W, Zhang L. Surface-tension change of graphene-based water nanofluid and its effects on heat-transfer process. Journal of Molecular Liquids 2023; 392: 123457.
- [10] Thirumalaisamy K, Sivaraj R, Reddy AS. Fluid flow and heat transfer analysis of a ternary aqueous Fe3O4+ MWCNT+ Cu/H2O magnetic nanofluid in an inclined rectangular porous cavity. Journal of Magnetism and Magnetic Materials 2024; 589: 171503.
- [11] Perarasu T, Arivazhagan M, Sivashanmugam P. Experimental and CFD heat transfer studies of Al2O3-water nanofluid in a coiled agitated vessel equipped with propeller. Chinese Journal of Chemical Engineering 2013; 21(11): 1232-1243.
- [12] Tiwari S, Amarnath M, Gupta MK. Synthesis, characterization, and application of Al2O3/coconut oil-based nanofluids in sustainable machining of AISI 1040 steel. Journal of Molecular Liquids 2023; 386: 122465.
- [13] Akkaya M. Nanopartiküllerin soğutma sistemlerinin performansı üzerine olan etkilerinin incelenmesi. PhD Thesis, Gazi University, 2020.
- [14] Çiftçi E. Nanoakışkanların kaynama-yoğuşma ısı transferi karakteristiklerinin deneysel ve sayısal olarak incelenmesi. PhD Thesis, Gazi University, 2020.
- [15] Pak BC, Cho YI. Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide particles. Experimental Heat Transfer 1998; 11(2): 151-170.
- [16] Ali HM. Hybrid nanofluids for convection heat transfer. Academic Press, London, UK, 2020.
- [17] O’Hanley H, Buongiorno J, McKrell T, Hu LW. Measurement and model validation of nanofluid specific heat capacity with differential scanning calorimetry. Advances in Mechanical Engineering 2012; 4: 181079.
- [18] Maxwell JC. A treatise on electricity and magnetism. Clarendon Press, 1881.
- [19] Kahraman G. Türbin Kılavuz Yataklarının Soğutulmasında Kullanılan Isı Değiştirgeçlerinin Performanslarının Araştırılması. PhD Thesis, Fırat University, 2010.
- [20] Çiftçi E. Investigation of the thermophysical properties of AlN+ ZnO/deionized water hybrid nanofluid. International Journal of Energy Studies 2020; 5(2): 57-69.
- [21] Öztürk M, Çiftçi E. Değişken sayıda delikler içeren emici plakalara sahip güneş enerjili hava ısıtıcısının sayısal analizi. Gazi University Journal of Science Part C: Design and Technology 2023; 11(4): 1162-1170.
Öz
Proje Numarası
202308
Kaynakça
- [1] Oliveira MVM, Daniel GB. Vibrational signature of journal bearing oil starvation considering thermal effects and rotor unbalance variation. Tribology International 2024; 191: 109132.
- [2] Singh V, Rajput AK. Piezo-viscous-polar lubrication of hybrid conical journal bearing with slip boundary conditions. Tribology International 2024; 109298.
- [3] Akkaya M, Menlik T, Sözen A, Gürü M. Experimental investigation of nanolubricant usage in a cooling system at different nanoparticle concentrations. Heat Transfer Research 2020; 51(10): 949–965.
- [4] Sözen A, Variyenli HI, Özdemir MB, Gürü M. Upgrading the thermal performance of parallel and cross-flow concentric tube heat exchangers using MgO nanofluid. Heat Transfer Research 2017; 48(5): 419–434.
- [5] Chen M, He Y, Zhu J, Wen D. Investigating the collector efficiency of silver nanofluids based direct absorption solar collectors. Applied Energy 2016; 181: 65-74.
- [6] Sözen A, Gürü M, Menlik T, Karakaya U, Çiftçi E. Experimental comparison of triton x-100 and sodium dodecyl benzene sulfonate surfactants on thermal performance of TiO2–deionized water nanofluid in a thermosiphon. Experimental Heat Transfer 2018; 31(5): 450-469.
- [7] Ozdemir MB. Ergun ME. Experimental and numerical investigations of thermal performance of Al2O3/water nanofluid for a combi boiler with double heat exchangers. International Journal of Numerical Methods for Heat & Fluid Flow 2019; 29(4): 1300-1321.
- [8] Afzal S, Qayyum M, Akgül A, Hassan AM. Heat transfer enhancement in engine oil based hybrid nanofluid through combustive engines: An entropy optimization approach. Case Studies in Thermal Engineering 2023; 52: 103803.
- [9] Du W, Ma J, Wang W, Zhang L. Surface-tension change of graphene-based water nanofluid and its effects on heat-transfer process. Journal of Molecular Liquids 2023; 392: 123457.
- [10] Thirumalaisamy K, Sivaraj R, Reddy AS. Fluid flow and heat transfer analysis of a ternary aqueous Fe3O4+ MWCNT+ Cu/H2O magnetic nanofluid in an inclined rectangular porous cavity. Journal of Magnetism and Magnetic Materials 2024; 589: 171503.
- [11] Perarasu T, Arivazhagan M, Sivashanmugam P. Experimental and CFD heat transfer studies of Al2O3-water nanofluid in a coiled agitated vessel equipped with propeller. Chinese Journal of Chemical Engineering 2013; 21(11): 1232-1243.
- [12] Tiwari S, Amarnath M, Gupta MK. Synthesis, characterization, and application of Al2O3/coconut oil-based nanofluids in sustainable machining of AISI 1040 steel. Journal of Molecular Liquids 2023; 386: 122465.
- [13] Akkaya M. Nanopartiküllerin soğutma sistemlerinin performansı üzerine olan etkilerinin incelenmesi. PhD Thesis, Gazi University, 2020.
- [14] Çiftçi E. Nanoakışkanların kaynama-yoğuşma ısı transferi karakteristiklerinin deneysel ve sayısal olarak incelenmesi. PhD Thesis, Gazi University, 2020.
- [15] Pak BC, Cho YI. Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide particles. Experimental Heat Transfer 1998; 11(2): 151-170.
- [16] Ali HM. Hybrid nanofluids for convection heat transfer. Academic Press, London, UK, 2020.
- [17] O’Hanley H, Buongiorno J, McKrell T, Hu LW. Measurement and model validation of nanofluid specific heat capacity with differential scanning calorimetry. Advances in Mechanical Engineering 2012; 4: 181079.
- [18] Maxwell JC. A treatise on electricity and magnetism. Clarendon Press, 1881.
- [19] Kahraman G. Türbin Kılavuz Yataklarının Soğutulmasında Kullanılan Isı Değiştirgeçlerinin Performanslarının Araştırılması. PhD Thesis, Fırat University, 2010.
- [20] Çiftçi E. Investigation of the thermophysical properties of AlN+ ZnO/deionized water hybrid nanofluid. International Journal of Energy Studies 2020; 5(2): 57-69.
- [21] Öztürk M, Çiftçi E. Değişken sayıda delikler içeren emici plakalara sahip güneş enerjili hava ısıtıcısının sayısal analizi. Gazi University Journal of Science Part C: Design and Technology 2023; 11(4): 1162-1170.
Ayrıntılar
| Birincil Dil | İngilizce |
|---|---|
| Konular | Enerji |
| Bölüm | Research Article |
| Yazarlar | |
| Proje Numarası | 202308 |
| Yayımlanma Tarihi | 22 Mart 2024 |
| Gönderilme Tarihi | 29 Ocak 2024 |
| Kabul Tarihi | 20 Şubat 2024 |
| Yayımlandığı Sayı | Yıl 2024 Cilt: 9 Sayı: 1 |
