喷雾加湿器与家用散热器耦合作用研究
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摘要
家用散热器是北方冬季采暖最普遍的末端装置,增强散热器的散热性能对减少供热能耗有重要意义。本文提出将喷雾加湿器与散热器组合利用,不仅有利于提高散热器的散热能力,而且加速了水雾的蒸发速度。本文搭建了散热器耦合喷雾加湿测试系统,研究了喷雾加湿对散热器性能的影响。实验结果表明,散热器近壁面环境温度与风速要远高于室内大空间温度,因此传统设计中以室内温度为基准不利于准确计算散热器的散热能力。喷雾加湿不仅能够降低散热器附近的局部环境温度,而且能够增大局部风速,提高散热器表面的传热系数,因此使散热器散热功率得到大幅提升,并且随着加湿量的增大,强化效果显著增强。该研究结果可为北方新型高效散热器的设计和应用提供参考。
Household radiator is the most common terminal device for north winter heating. Enhancing the heat dissipation performance of the radiator is of great significance to the reduction of heating energy consumption. The combination of spray humidifier and radiator proposed in this paper can not only improve the heat dissipation of the radiator, but also accelerate the evaporation speed of water mist. The radiator coupled spray humidification test system is built and the influence of spray humidification on the performance of radiator is studied. The experimental results show that the ambient temperature and the wind speed near the wall of the radiator are much higher than that of the indoor large space; therefore, the traditional indoor temperature-based design is not suitable for the accurate calculation of the heat dissipation capacity of the radiator. The spray humidification can not only reduce the local ambient temperature near the radiator, but also increase the local wind speed and improve the surface heat transfer coefficient of the radiator. Therefore, the heat dissipation power of the radiator is greatly improved, and the strengthening effect is significantly enhanced with the increase of humidifying capacity. The results can provide a reference for the design and application of new efficient radiator in north china.
Household radiator is the most common terminal device for north winter heating. Enhancing the heat dissipation performance of the radiator is of great significance to the reduction of heating energy consumption. The combination of spray humidifier and radiator proposed in this paper can not only improve the heat dissipation of the radiator, but also accelerate the evaporation speed of water mist. The radiator coupled spray humidification test system is built and the influence of spray humidification on the performance of radiator is studied. The experimental results show that the ambient temperature and the wind speed near the wall of the radiator are much higher than that of the indoor large space; therefore, the traditional indoor temperature-based design is not suitable for the accurate calculation of the heat dissipation capacity of the radiator. The spray humidification can not only reduce the local ambient temperature near the radiator, but also increase the local wind speed and improve the surface heat transfer coefficient of the radiator. Therefore, the heat dissipation power of the radiator is greatly improved, and the strengthening effect is significantly enhanced with the increase of humidifying capacity. The results can provide a reference for the design and application of new efficient radiator in north china.
引文
[1] 李圣安, 陈宝明, 王栋. 采暖房散热器温度场研究[J]. 制冷与空调, 2012,(6): 579-583
[2] Nedaei M, Motezakker A R, Zeybek M C, et al. Subcooled flow boiling heat transfer enhancement using pPFDA coated microtubes with different coating thicknesses[J]. Experimental Thermal and Fluid Science, 2017, 86: 130-140
[3] Okbaz A, P?narba? A, Olcay A B, et al. An experimental computational and flow visualization study on the air-side thermal and hydraulic performance of louvered fin and round tube heat exchangers[J]. International Journal of Heat and Mass Transfer, 2018, 121: 153-169
[4] Selvam C, Raja R S, Lal D M, et al. Overall heat transfer coefficient improvement of an automobile radiator with graphene based suspensions[J]. International Journal of Heat and Mass Transfer, 2017, 117: 580-588
[5] 王坤迪. 一种新型铝合金电散热器的结构优化[D]. 青岛:青岛理工大学, 2012
[6] Goudarzi K, Jamali H. Heat transfer enhancement of Al2O3-EG nanofluid in a Car radiator with wire coil inserts[J]. Applied Thermal Engineering, 2017, 118: 510-517
[7] Mudawar I, Estes K A. Comparison of two-phase electronic cooling using free jets and sprays[J]. Journal of Electronic Packaging, 1995, 117(4): 323-332
[8] Sienski K, Eden R, Schaefer D. 3-D electronic interconnect packaging[J]. Aerospace Applications Conference, 1996,(1): 363-373
[9] Oliphant K, Webb B W,Mcquay M Q. An Experimental comparison of liquid jet array and spray impingement cooling in the non-boiling regime[J]. Experimental Thermal & Fluid Science, 1998, 18(1): 1-10
[10] Cansevdi B. Improving the energy performance of air-cooled chillers with water-spray mist pre-cooling: An application[J]. Applied Thermal Engineering, 2010: 38:1-11
[11] Yang J, Chan KT, Wu X, et al. Performance enhancement of air-cooled chillers with water mist: Experimental and analytical investigation [J]. Applied Thermal Engineering, 2012, 40:114-120
[12] 黎敏婷, 丁云飞. 建筑玻璃屋面喷雾遮阳及降温效果[J]. 暖通空调, 2014, 44(12): 99-102
[13] 高理福, 常跃辉, 李云忠,等. 周期性喷雾蒸发冷却最佳气-水比的试验研究[J]. 暖通空调, 2014, 44(2): 69-72
[2] Nedaei M, Motezakker A R, Zeybek M C, et al. Subcooled flow boiling heat transfer enhancement using pPFDA coated microtubes with different coating thicknesses[J]. Experimental Thermal and Fluid Science, 2017, 86: 130-140
[3] Okbaz A, P?narba? A, Olcay A B, et al. An experimental computational and flow visualization study on the air-side thermal and hydraulic performance of louvered fin and round tube heat exchangers[J]. International Journal of Heat and Mass Transfer, 2018, 121: 153-169
[4] Selvam C, Raja R S, Lal D M, et al. Overall heat transfer coefficient improvement of an automobile radiator with graphene based suspensions[J]. International Journal of Heat and Mass Transfer, 2017, 117: 580-588
[5] 王坤迪. 一种新型铝合金电散热器的结构优化[D]. 青岛:青岛理工大学, 2012
[6] Goudarzi K, Jamali H. Heat transfer enhancement of Al2O3-EG nanofluid in a Car radiator with wire coil inserts[J]. Applied Thermal Engineering, 2017, 118: 510-517
[7] Mudawar I, Estes K A. Comparison of two-phase electronic cooling using free jets and sprays[J]. Journal of Electronic Packaging, 1995, 117(4): 323-332
[8] Sienski K, Eden R, Schaefer D. 3-D electronic interconnect packaging[J]. Aerospace Applications Conference, 1996,(1): 363-373
[9] Oliphant K, Webb B W,Mcquay M Q. An Experimental comparison of liquid jet array and spray impingement cooling in the non-boiling regime[J]. Experimental Thermal & Fluid Science, 1998, 18(1): 1-10
[10] Cansevdi B. Improving the energy performance of air-cooled chillers with water-spray mist pre-cooling: An application[J]. Applied Thermal Engineering, 2010: 38:1-11
[11] Yang J, Chan KT, Wu X, et al. Performance enhancement of air-cooled chillers with water mist: Experimental and analytical investigation [J]. Applied Thermal Engineering, 2012, 40:114-120
[12] 黎敏婷, 丁云飞. 建筑玻璃屋面喷雾遮阳及降温效果[J]. 暖通空调, 2014, 44(12): 99-102
[13] 高理福, 常跃辉, 李云忠,等. 周期性喷雾蒸发冷却最佳气-水比的试验研究[J]. 暖通空调, 2014, 44(2): 69-72