Termoelektrik Soğutma Sisteminin Alternatif Transformatör Soğutma Sistemi Olarak Performansı

Dağıtım transformatörleri kullanıldıkları yerlere göre farklı soğutma sistemleri ile soğutulmakta olup, soğutma tipine göre yağlı tip ve kuru tip transformatörler olarak isimlendirilmektedir. Yağlı tip transformatörlerin soğutulmasında, klasik transformatör yağı olarak adlandırılan naftanik ve parafinik yağlar, yani parafin (mum) içerikli dielektriksel dayanımı yüksek yalıtım malzemeleri kullanılmaktadır. Bu yağların yanma dereceleri ve dielektriksel dayanımlarının arttırılmasını amaçlayan yenilikçi yaklaşımlar son yıllarda artmaktadır. Bu çalışmalarda, daha iyi özelliklere sahip ester bazlı yağlar, klasik transformatör yağlarının yerine kullanılarak transformatörlerin performansını ve faydalı ömrünü arttıran sonuçlar elde edilmiştir. Ancak, transformatör yağlarının özellikleri ne kadar iyi olsa da, çevre kirliliği oluşturması, yanma-patlama özelliği, bakım-onarım maliyetleri, transformatör yalıtımında dezavantaj oluşturmaktadır. Bu dezavantajların giderilmesi için, bu çalışmada, çevre dostu ve yenilenebilir enerji kaynaklarından olan termoelektrik soğutucular kullanılarak, yağlı tip transformatör soğutulmaktadır. Yapılan çalışma sonucunda termoelektrik soğutma sisteminin naftanik ve ester bazlı yağ soğutma tiplerine göre yaklaşık % 15-20 daha iyi soğutma sağladığı tespit edilmiştir. Bu soğutma sisteminin, transformatör soğutma sistemleri içerisinde yeni bir teknoloji ve tür olarak yer alacağı değerlendirilmektedir.

Anahtar Kelimeler:

Yağlı tip transformatör, Ester bazlı yağ, Naftanik Yağ, Termoelektrik soğutma, TEC, Soğutma sistemleri.

Performance of Thermoelectric Cooling System as an Alternative Transformer Cooling System

Distribution transformers are cooled by different cooling systems according to the places in which they are used, and they are named oil-type and dry-type transformers according to this cooling type. In the cooling of oil-type transformers naphtanic and paraffinic oils, namely paraffin (wax)-containing insulating materials with high dielectric strength, called classical transformer oil, are used. Innovative approaches aiming to increase the degree of combustion and dielectric strength of these oils have been increasing in recent years. In these studies, higher quality oils such as ester-based oils have been used instead of conventional transformer oils, resulting in increased effects on the performance and life time of transformers. However, regardless of the characteristics of transformer oils, their features such as burning-explosive properties that cause environmental pollution and excess maintenance-repair costs create disadvantages in their use in transformer insulation. In this study conducted to eliminate such disadvantages, the oil-type transformers is cooled by using thermoelectric coolers, which are environmentally friendly and renewable energy sources. As a result of the study, it was determined that the thermoelectric cooling system provides 15-20% better cooling than naphtanic and ester based oil cooling types. It is considered that this will take place as a new technology and type in distribution transformer cooling systems.

Keywords:

Oil-type transformers, Ester-based oils, Naphtanic-based oils, Thermoelectric cooler, TEC, Cooling systems.,

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Ab Ghani, S., Muhamad, N. A., Noorden, Z. A., Zainuddin, H., Abu Bakar, N., & Talib, M. A. (2018). Methods for improving the workability of natural ester insulating oils in power transformer applications: A review. Electric Power Systems Research, 163, 655–667. doi: 10.1016/J.EPSR.2017.10.008
Ahiska, R., Ahiska, G., & Ahiska, K. (2009). Analysis of a New Method for Measurement of Parameters of Real Thermoelectric Module Employed in Medical Cooler for Renal Hypothermia. Instrumentation Science and Technology, 37(1), 102–123. doi: 10.1080/10739140802584772
Ahıska, R., & Ahıska, K. (2013). Esnek İki Fazlı Termoelektrik CPU Soğutucusu. Journal of the Faculty of Engineering and Architecture of Gazi University, 22(2), 347–351. Retrieved from https://dergipark.org.tr/en/pub/gazimmfd/88383
Cai, Y., Wang, Y., Liu, D., & Zhao, F. Y. (2019). Thermoelectric cooling technology applied in the field of electronic devices: Updated review on the parametric investigations and model developments. Applied Thermal Engineering, 148, 238–255. doi: 10.1016/J.APPLTHERMALENG.2018.11.014
Cuce, E., Guclu, T., & Cuce, P. M. (2020). Improving thermal performance of thermoelectric coolers (TECs) through a nanofluid driven water to air heat exchanger design: An experimental research. Energy Conversion and Management, 214, 112893. doi: 10.1016/j.enconman.2020.112893
Dalcali, A., & Demirel, H. (2016). Microcontroller-based cooling of a single-phase transformer with thermoelectric module. The International Journal of Energy and Engineering Sciences, 1(2), 4–14. Retrieved from https://dergipark.org.tr/en/pub/ijees/612249
Dmitriev, A. V., Dmitrieva, O. S., & Madyshev, I. N. (2017). Prospects for the Use of Additional Cooling System for the Oil-Immersed Transformers with Thermoelectric Transducers. MATEC Web of Conferences, 95, 15012. doi: 10.1051/matecconf/20179515008
Dombek, G., Goscinski, P., & Nadolny, Z. (2017). Comparison of mineral oil and esters as cooling liquids in high voltage transformer in aspect of environment protection. E3S Web of Conferences, 14, 01053. doi: 10.1051/E3SCONF/20171401053
Filho, A. A. P., Luna, F. M. T., & Cavalcante, C. L. (2019). Oxidative stability of mineral naphthenic insulating oils: Optimization of commercial antioxidants and metal passivators. IEEE Transactions on Dielectrics and Electrical Insulation, 26(1), 240–246. doi: 10.1109/TDEI.2018.007513
Garelli, L., Ríos Rodriguez, G. A., Kubiczek, K., Lasek, P., Stepien, M., Smolka, J., Storti, M., Pessolani, F., & Amadei, M. (2021). Thermo-magnetic-fluid dynamics analysis of an ONAN distribution transformer cooled with mineral oil and biodegradable esters. Thermal Science and Engineering Progress, 23, 100861. doi: 10.1016/J.TSEP.2021.100861
Hasan, M. I., Ugla, A. A., & Kadhim, H. S. (2020). Improving the thermal performance of electrical transformers using hybrid mixture of (transformer oil, nanoparticles, and PCM). Al-Qadisiyah Journal for Engineering Sciences, 13(3), 175–182. doi: 10.30772/QJES.V13I3.704
Hsin, C. L., Wu, M. H., & Wang, W. C. (2019). Thermoelectric Devices by Half-Millimeter-Long Silicon Nanowires Arrays. IEEE Transactions on Nanotechnology, 18, 921–924. doi: 10.1109/TNANO.2019.2938624
Hubbard, W. A., Mecklenburg, M., Lodico, J. J., Chen, Y., Ling, X. Y., Patil, R., Kessel, W. A., Flatt, G. J. K., Chan, H. L., Vareskic, B., Bal, G., Zutter, B., & Regan, B. C. (2020). Electron-Transparent Thermoelectric Coolers Demonstrated with Nanoparticle and Condensation Thermometry. ACS Nano, 14(9), 11510–11517. doi: 10.1021/acsnano.0c03958
Jiang, L., Zhang, H., Li, J., & Xia, P. (2019). Thermal performance of a cylindrical battery module impregnated with PCM composite based on thermoelectric cooling. Energy, 188, 116048. doi: 10.1016/J.ENERGY.2019.116048
Kaymaz, O., Kalkan, G., & Erek, A. (2015). Flow and heat transfer characterıstıcs of dıfferent transformer oıls ın one sectıon of transformer radıator. Mühendis ve Makina, 56(666), 53–63. Retrieved from https://dergipark.org.tr/en/pub/muhendismakina/736101
Koh, Y. R., Yazawa, K., & Shakouri, A. (2014). Cooling heat flux, COP, and cost optimization of integrated thermoelectric microcoolers with variation of thermoelectric properties. Thermomechanical Phenomena in Electronic Systems -Proceedings of the Intersociety Conference, 1412–1416. doi: 10.1109/ITHERM.2014.6892445
Lamarre, C., Crine, J. P., & Duval, M. (1987). Influence of oxidation on the electrical properties of inhibited naphthenic and paraffinic transformer oils. IEEE Transactions on Electrical Insulation, EI-22(1), 57–62. doi: 10.1109/TEI.1987.298965
Manjang, S., Kitta, I., & Ikhlas, A. (2019, October 1). Voltage Breakdown Characteristics of Transformer Mineral Oil with Varies the Composition of Corn Oil. Proceedings of the 2nd International Conference on High Voltage Engineering and Power Systems: Towards Sustainable and Reliable Power Delivery, ICHVEPS 2019. doi: 10.1109/ICHVEPS47643.2019.9011119
Perez, J. (2010). Fundamental principles of transformer thermal loading and protection. 63rd Annual Conference for Protective Relay Engineers. doi: 10.1109/CPRE.2010.5469518
Rao, U. M., Pulluri, H., & Kumar, N. G. (2018). Performance analysis of transformer oil/paper insulation with ester and mixed dielectric fluids. IEEE Transactions on Dielectrics and Electrical Insulation, 25(5), 1853–1862. doi: 10.1109/TDEI.2018.007224
Rouabeh, J., M’barki, L., Hammami, A., Jallouli, I., & Driss, A. (2019). Studies of different types of insulating oils and their mixtures as an alternative to mineral oil for cooling power transformers. Heliyon, 5(3), e01159. doi: 10.1016/j.heliyon.2019.e01159
Sekiguchi, R., Liu, Y., & Sano, Y. (2018). Thermal Equivalent Circuit of Peltier Device Considered Seebeck Effect and Driving Method Improving Cooling Efficiency of the Device. Electronics and Communications in Japan, 101(5), 73–83. doi: 10.1002/ecj.12065
Shell Diala S4 ZX-I Trafo Yağı. (n.d.). Retrieved from https://solutions.shell.com/in/products/Diala_S4_ZX-I__001E8701 Specification of Thermoelectric Module. (n.d.). Retrieved from http://www.thermonamic.com/TEC1-12706-English-20201124.pdf
Toren, M., & Celebi, M. (2016). Impact on efficiency of core materials in dry type transformers. 2016 National Conference on Electrical, Electronics and Biomedical Engineering, 170–173.
Toren, M., & Mollahasanoglu, H. (2021). Investigation of thermoelectric cooler system effect on induction motor performance. 2021 17th Conference on Electrical Machines, Drives and Power Systems, ELMA 2021 - Proceedings. doi: 10.1109/ELMA52514.2021.9503049
Trafo Yağı. (n.d.). Retrieved from http://speedol.com.tr/trafo-yagi/
Wang, X., & Wang, Z. D. (2008). Particle effect on breakdown voltage of mineral and ester based transformer oils. Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP, 598–602. doi: 10.1109/CEIDP.2008.4772859
Wang, Xiaobo, Tang, C., Huang, B., Hao, J., & Chen, G. (2018). Review of Research Progress on the Electrical Properties and Modification of Mineral Insulating Oils Used in Power Transformers. Energies, 11(3), 487. doi: 10.3390/EN11030487