THERMAL SCIENCE
International Scientific Journal
Thermal Science - Online First
online first only
Numerical simulation for optimising of inlet and outlet positions for mechanical ventilation and heat dissipation: A case study to improve ventilation in an indoor 110kV substation
ABSTRACT
Efficient ventilation and heat dissipation in indoor substations are crucial for the stable operation of transformers. This study investigates the impact of inlet and outlet positions on ventilation and heat dissipation performance in a 110kV indoor substation using computational fluid dynamics. A model of the 110kV main transformer chamber is developed. Twelve combinations of inlet and outlet positions are analysed. Inlet positions include side walls parallel to radiators, side walls perpendicular to radiators and both side walls perpendicular to radiators. Outlet positions include the top of the chamber, the side of the inlet, adjacent to the inlet, and opposite inlet. Results demonstrate that locating outlets at the top of the chamber reduces transformer temperature by 0.5-1.6ºC and increases energy utilization by8.6%-24.8% regardless of inlet position. Two opposite inlets perpendicular to radiators allows even air distribution between radiators. And this configuration reduces transformer temperature by 3.4ºC when the outlet is located at the top of the chamber. Overall, the optimal ventilation design involves top chamber outlets and inlets on opposite walls perpendicular to radiators.
KEYWORDS
PAPER SUBMITTED: 2024-02-06
PAPER REVISED: 2024-03-18
PAPER ACCEPTED: 2024-03-25
PUBLISHED ONLINE: 2024-05-18
- Xie, R., et al., Optimization of Ventilation and Heat Dissipation Structure of Transformer Chamber in Prefabricated Substation Based on Multi-Physics Coupling, 2023 IEEE 4th International Conference on Electrical Materials and Power Equipment (ICEMPE), Shanghai, China, 2023, pp.1-3
- Liu, Y., et al., Ventilation Optimization for Reduction of Indoor Air Temperature of Main Transformer chamber in Urban Indoor Substation by the Variational Method, Journal of Thermal Science,28(2019),5, pp.1089-1101
- Xu, L., et al., A Fast Computational Fluid Dynamics Model for the Flow and Heat Transfer Characteristics Analysis of Indoor Substation Rooms, IOP Conference Series: Materials Science and Engineering, 199(2017), 1, 012076
- Liu, H., et al. Study on ventilation of indoor substation main transformer chamber based on COMSOL software, International Conference on Electrical Materials and Power Equipment (ICEMPE), Xi'an, China, 2017, pp.296-300
- Xu R., et al., Simulation Study on Ventilation & Cooling for an Indoor Substation, Applied Mechanics and Materials,672(2014), pp.672-674
- Cheng, L., et al., Influence of Box-in Structure on Heat Dissipation Performance of UHV Converter Transformer, 2021 IEEE 4th International Electrical and Energy Conference (CIEEC), Wuhan, China, 2021, pp.1-6
- Wei, B., et al., Study on simulation test device of transformer split type cooling system, Energy Procedia, 100 (2016), pp. 556-560
- Niu, W., et al. The experimental study of a novel cooling system of a power transformer in an urban underground substation,2010 International Conference on Power System Technology. IEEE, 2010, pp.1-6
- Peng, L., et al., Numerical Analysis of Temperature Field of Outdoor Transformer with Noise Barrier, Journal of Physics: Conference Series,1600(2020),1,012056
- Perng, J. W., et al., Power Substation Construction and Ventilation System Co-Designed Using Particle Swarm Optimization, Energies, 13(2020), 2314
- Wiriyasart, S., et al., Numerical study on air ventilation in the workshop room with multiple heat sources, Case Studies in Thermal Engineering,13 (2019), 100405
- Zheng, C., et al., Comparison of air-conditioning systems with bottom-supply and side-supply modes in a typical office room, Applied Energy, 227 (2018), pp.304-311
- Chen, H., et al., Numerical investigation of ventilation performance of different air supply devices in an office environment, Building and Environment, 90 (2015), pp.37-50
- Chen Y., et al., Study of ventilation cooling technology for telecommunication base stations in Guangzhou, Energy & Buildings, 41(2009),7, pp.738-744
- He, Y., et al., Experimental and CFD study of ventilation performance enhanced by roof window and mechanical ventilation system with different design strategies, Building and Environment, 224(2022),109566
- Tong, L., et al., A novel flow-guide device for uniform exhaust in a central air exhaust ventilation system, Building and Environment, 149(2019), pp.134-145
- Staveckis, A., et al., Impact of impinging jet ventilation on thermal comfort and indoor air quality in office buildings, Energy and Buildings, 235(2021), 110738
- Huang, Y., et al., Effects of the ventilation duct arrangement and duct geometry on ventilation performance in a subway tunnel, Tunnelling and Underground Space Technology, 26(2011), 6, pp. 25-733
- Huang, Y., et al., A numerical analysis of the ventilation performance for different ventilation strategies in a subway tunnel, Journal of Hydrodynamics, Ser. B, 24(2012),2, pp.193-201
- Park, J., et al. CFD modelling of ventilation ducts for improvement of air quality in closed mines, Geosystem Engineering, 19(2016), 4, pp.177-187
- Panchal, S., et al. Numerical simulation of cooling plate using K-epsilon turbulence model to cool down large-sized graphite/LiFePO4 battery at high C-rates, World Electric Vehicle Journal, 13(2022),8, pp.138
- Li, J., et al. Coarse-grid simulations of full-loop gas-solid flows using a hybrid drag model: Investigations on turbulence models, Powder Technology, 379(2021), pp.108-126
- ***, Tutorials of the STAR-CCM+2206, www.sw.siemens.com
- Li, H., et al., Study on the impact of parallel jet spacing on the performance of multi-jet stratum ventilation, Applied Energy, 306(2022), 118135
- Karimipanah, T., et al., Investigation of air quality, comfort parameters and effectiveness for two floor-level air supply systems in classrooms, Building and Environment, 42(2007), 2, pp.647-655
- Gao, R., et al., A new evaluation indicator of air distribution in buildings, Sustainable Cities and Society, 53 (2020), 101836