Numerical Simulation and Optimization Analysis of Wind Turbine Tower Ventilation and Heat Dissipation Based on CFD

doi:10.11985/2022.01.016

Abstract

Abstract:

The built-in transformer of wind turbine is a new arrangement, but it inevitably brings problems such as high heat output, increasing air ambient temperature and so on. In view of this, CFD technology is used to study the numerical simulation of the tower drum double-layer original mechanical ventilation and heat dissipation system with built-in transformer. By analyzing the speed field and temperature field of the calculation results, the shortcomings of the original scheme are pointed out. On this basis, three progressive optimization schemes are proposed. By comparing the temperature calculation results of the original scheme and each optimization scheme, the effectiveness of the optimization scheme is proved. The optimization results meet the design requirements of tower ambient temperature.

Key words: Built-in transformer, CFD, heat dissipation

CLC Number:

TK83

DUAN Heping, JIANG Tingting, LUO Yongshui, SHEN Xinhe, LI Yongliang. Numerical Simulation and Optimization Analysis of Wind Turbine Tower Ventilation and Heat Dissipation Based on CFD[J]. Journal of Electrical Engineering, 2022, 17(1): 122-128.

Figures/Tables 9

References 13

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名称	塔筒	变流器	排风扇管道	变压器罩	内外绕组	内外绕组空隙	内绕组与铁心	铁心
几何尺寸/m	直径4.5,总高16.15	2.6×0.55×2	长3.5	底面八边形,周长8.23,高2.46	高1.33	—	—	1.64×0.25×2.13
网格尺寸/m	0.1	0.1	0.05	0.05	0.02	0.02	0.02	0.02
结构体类型	流体	固体	流体	流体	固体	流体	流体	固体

	高低压线圈	铁心	变流器
发热功率/W	31 745(120 ℃)	6 041	33 000
体积/m³	0.835	0.415	2.945
材料属性	铜	铁	铁

方案/℃	第二层塔筒	第一层塔筒	整个塔筒	内绕组	外绕组	内外绕组整体	铁心	变压器罩	z1.65	z2.0	z2.4	风扇出口
原方案	43.63	51.01	45.62	117.53	109.3	112.47	107.81	58.09	62.12	62.78	60.49	61.73
方案一	41.40	50.61	43.89	123.78	130.12	128.00	111.32	58.49	60.74	60.67	59.62	61.81
方案二	41.42	50.48	43.85	123.78	119.31	121.03	109.43	56.13	56.32	59.43	59.64	61.88
方案三	41.43	50.10	43.77	123.80	116.61	120.96	109.97	55.96	55.87	58.95	58.67	61.89

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