Experiments and modeling of heat transfer in oil transformer winding with zigzag cooling ducts

Applied Thermal Engineering

Volumn 28, Issue 1, 2008, Pages 36-48

  Zhang, Jiahui ^a   Li, Xianguo ^a   Vance, Michael ^b  

^a UNIVERSITY OF WATERLOO   (Canada)

^b 944 South Service Road Stoney Creek   (Canada)

Author keywords

Coupling; Electric transformer; Experiment; Heat transfer; Hydraulic; Modelling

Indexed keywords

COMPUTER SIMULATION; DUCTS; HEAT TRANSFER; HYDRAULICS; OPTIMIZATION; REYNOLDS NUMBER; THERMAL GRADIENTS;

CIRCUMFERENTIAL DIRECTION; COOLING OIL FLOW; NONLINEAR OPTIMIZATION; WINDING DISKS;

TRANSFORMER WINDINGS;

EID: 34848893887     PISSN: 13594311     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.applthermaleng.2007.02.012     Document Type: Article

References (43)

1. Mufuta J.-M. Comparison of experimental values and numerical simulation on a set-up simulating the cross-section of a disc-type transformer. International Journal of Thermal Sciences 38 5 (1999) 424-435
2. Mufuta J.-M., and van den Bulck E. Modelling of the mixed convection in the windings of a disc-type power transformer. Applied Thermal Engineering 20 5 (2000) 417-437
3. Mufuta J.-M. Thermal hydrodynamic model of oil-immersed power transformers. ASME Fluids Engineering Division 256 (2001) 319-326
4. E.P. Childs, Flow maldistribution in disc-type power transfer windings, in: ASME: The 24th National Heat Transfer Conference and Exhibition, Pittsburgh, PA, 1987, pp. 137-143.
5. Nakadate M., Toda K., Sato K., Biswas D., Nakagawa C., and Yanari T. Gas cooling performance in disc winding of large-capacity gas-insulated transformer. IEEE Transactions on Power Delivery 11 2 (1996) 903-908
6. Oliver A.J. Estimation of transformer winding temperatures and coolant flows using a general network method. IEE Proceedings, Part C 127 6 (1980) 395-405
7. Oliver A.J. A general method for predicting the flows and temperature in a network of interconnecting ducts. In: Lewis R.W., Morgan K., and Schrefler B.A. (Eds). Numerical Methods in Thermal Problems: Proceedings of the Second International Conference (1981), Pineridge Press, Swansea, England 623-635
8. P.J. Burton, J. Graham, A.C. Hall, J.A. Laver, A.J. Oliver, Recent development by CEGB to improve the prediction and monitoring of transformer performance, in: International Conference on Large High Voltage Electric System, Paris, 29 August-6 September, 1984, 12-09.
9. R.M. Del Vecchio, P. Feghali, Thermal model of a disk coil with directed oil flow, in: Proceedings of the 1999 IEEE Transmission and Distribution Conference, vol. 2, pp. 914-919.
10. P.H.G. Allen, E.P. Childs, Conjugated heat transfer in disc-type power transformer windings, in: Proceedings of the Eighth International Heat Transfer Conference, San Francisco, CA, USA., vol. 6, 1986, pp. 2977-2982.
11. J. Declercq, W. Van der Veken, Accurate hot spot modeling in a power transformer leading to improved design and performance, in: Proceedings of the 1999 IEEE Transmission and Distribution Conference, vol. 2, pp. 920-924.
12. L. Imre, I. Szabo, A. Bitai, Determination of the steady state temperature field in naturally oil-cooled disc-type transformers, in: Proceedings of 6th International Heat Transfer Conference, Toronto, vol. II, August, 1978, pp. 123-128.
13. Imre L., Bitai A., and Csenyi P. Thermal transient analysis of OFAF transformers by numerical methods. In: Lewis R.W., Morgan K., and Schrefler B.A. (Eds). Numerical Methods in Thermal Problems: Proceedings of the Second International Conference (1981), Pineridge Press, Swansea, England 899-909
14. Imre L., Bitai A., and Csenyi P. Numerical analysis of transient heat and mass flow networks using subsystem functions. In: Lewis R.W., Jihnson J.A., and Smith W.R. (Eds). Numerical Methods in Thermal Problems: Proceedings of the Third International Conference (1983), Pineridge Press, Swansea, England 993-1003
15. Sarunac R. Non-linear heat and mass transfer of composite device of oil-immersed self-cooled power transformers using general network model. In: Taylor C., Owen D.R.J., Hinton E., and Damjanic F.B. (Eds). Numerical Methods for Non-linear Problems: Proceedings of the International Conference held at Dubrovnik, Yugoslavia, 15th-18th September vol. 3 (1986), Pineridge Press, Swansea, England 1035-1047
16. Sarunac R. Numerical calculation of the winding temperatures and coolant flows in power transformer with ODAF type of cooling. Numerical Methods in Thermal Problems: Proceedings of the Sixth International Conference (1989), Pineridge Press, Swansea, Wales 1644-1654
17. Pierce L.W. Predicting hottest spot temperatures in ventilated dry type transformer windings. IEEE Transactions on Power Delivery 9 2 (1994) 1160-1172
18. L.W. Pierce; T. Holifield, A thermal model for optimized distribution and small power transformer design, in: Proceedings of the 1999 IEEE Transmission and Distribution Conference, vol. 2, pp. 925-929.
19. Preiningerova V., and Pivrnec M. Temperature distribution in the coil of a transformer winding. Proceedings of IEE 124 2 (1977) 218-222
20. Preiningerova V., Kahoun V., and Dolezel I. Thermal analysis of large oil-immersed transformer windings. Electric Machines and Power Systems 8 2 (1983) 89-102
21. P. Venkateswarlu, A.R. Prasad, Numerical prediction of the temperature distribution in the coils of a transformer winding, in: International Conference on Large High Voltage Electric System, Paris, 29 August-6 September, 1984, p. 12-04.
22. Sarunac R., and Pavlicevic M. Numerical solution of temperature field in the coil of a disc-rebel type transformer winding assuming the non-homogenous distribution of losses in winding. In: Lewis R.W., and Morgan K. (Eds). Numerical Methods in Thermal Problems: Proceedings of the Fourth International Conference vol. 2 (1985), Pineridge Press, Swansea, Wales 1531-1540
23. Carstea I.T. Program for heat transfer analysis in electrical transformers. Modelling, Measurement and Control A 54 4 (1994) 57-64
24. Carstea I.T. Program for heat transfer analysis in large power transformers windings. Modelling, Measurement and Control A 57 3 (1994) 31-39
25. Gane C.R., and Stephenson P.L. An explicit numerical method for solving transient combined heat conduction and convection problems. International Journal for Numerical Methods in Engineering 14 (1979) 1141-1163
26. Gane C.R., Oliver A.J., Soulsby D.R., and Stephenson P.L. Numerical solution of coupled conduction-convection problems using lumped-parameter methods. In: Lewis R.W., Morgan K., and Schrefler B.A. (Eds). Numerical Methods in Heat Transfer vol. 2 (1983), Wiley, Toronto 227-274
27. Gane C.R., and Stephenson P.L. Direct and iterative methods for solving steady-state, coupled conduction and convection equations. In: Lewis R.W., Jihnson J.A., and Smith W.R. (Eds). Numerical Methods in Thermal Problems: Proceedings of the Third International Conference (1983), Pineridge Press, Swansea, England 652-662
28. Stephenson P.L. A comparison of various finite element methods for the solution of coupled conduction-convection problems. In: Lewis R.W., Jihnson J.A., and Smith W.R. (Eds). Numerical Methods in Thermal Problems: Proceedings of the Third International Conference (1983), Pineridge Press, Swansea, England 694-704
29. L. Imre, A. Bitai, Sz. Palkovics, Heat transfer and flow characteristics of large oil transformer windings, in: Proceedings of 8th International Heat Transfer Conference, vol. 6, August, 1986, pp. 2989-2994.
30. Shah R.K., and London A.L. Laminar flow forced convection in ducts. Advances in Heat Transfer Suppl. 1 (1978) 182
31. Rohsenow W.M., and Hartnett J.P. Handbook of Heat Transfer (1998), McGraw-Hill, New York
32. Yamazaki H., and Sakamoto T. Basic cooling characteristics of perfluorocarbon liquid immersed windings for nonflammable transformers. Part 1. disk coil cooling for large-capacity forced circulating transformers. Heat Transfer - Japanese Research 20 7 (1991) 656-667
33. Yamazaki H., and Sakamoto T. Experimental study on flow and heat-transfer characteristics of transformer windings composed of conductors wound with thread spacers. Part 1. comparison with baffle-plate windings. Heat Transfer - Japanese Research 22 6 (1993) 625-641
34. Sellars J.R., Tribus M., and Klein S.J. Heat transfer to laminar flow in a round tube or flat conduit-the Graetz problem extended. Transactions of the ASME 78 (1956) 441-448
35. Zhang J., and Li X. Coolant flow distribution and pressure loss in ONAN transformer windings - Part I: theory and model development. IEEE Transactions on Power Delivery 19 1 (2004) 186-193
36. Zhang J., and Li X. Coolant flow distribution and pressure loss in ONAN transformer windings - Part II: optimization of design parameters. IEEE Transactions on Power Delivery 19 1 (2004) 194-199
37. Zhang J., and Li X. Natural cooling oil flow in disk-type transformer windings with zigzag flow passages. International Journal of Transport Phenomena 7 (2005) 199-218
38. Jiahui Zhang, Xianguo Li, Oil cooling for disk-type transformer windings - Part 1: theory and model development, 2004, Power Delivery, IEEE Transactions, in press.
39. Jiahui Zhang, Xianguo Li, Oil cooling for disk-type transformer windings - Part 2: parametric studies of design parameters, 2004, Power Delivery, IEEE Transactions, in press.
40. Holeman J.P. Experimental methods for Engineer. sixth ed. (1994), McGraw-Hill, Inc.
41. Box M.J. A new method of constrained optimization and a comparison with other methods. Computer Journal 8 (1965) 42-52
42. Ormsbee L.E. Implicit pipe network calibration. Journal of Water Research Planning and Management, ASCE 115 2 (1989) 243-257
43. Kuester J.L., and Mize J.H. Optimization Techniques with Fortran (1973), McGraw-Hill pp. 367-385