摘要
建立了太阳能增效空冷塔的三维数值模型,通过数值模拟探究了将太阳能增效空冷塔内蓄热层表面形状由平面形改为矩形和波纹形的可行性,对比研究了3种不同形状地面蓄热层对太阳能增效空冷塔换热性能的影响规律,并获得了太阳能增效空冷塔地面蓄热层形状的优化方案.研究发现:①对于140 m高的太阳能增效空冷塔,在进塔水温333.15 K(60℃)、环境温度303.15 K(30℃)、1000 W/m2辐射强度下,蓄热层表面为平面形、波纹形、矩形时,冷却塔的排热量分别为132.9MW、145.3 MW和149.2MW,即矩形蓄热层对太阳能增效空冷塔性能的改善效果优于波纹形;②结论1同样适用于进塔水温为50℃、55℃的情况;③综合考虑建造成本及实际施工难度,工程实际应用时建议优先选用矩形的蓄热层形状,以更好地利用太阳能提升空冷塔的换热性能.此研究可用于太阳能增效空冷塔的优化设计领域,为太阳能增效空冷塔的实际应用奠定理论基础.
In this study,we established a three dimensional(3D)model of a solar-enhanced natural-draft dry cooling tower(SENDDCT)to investigate the feasibility of changing the surface shape of the thermal storage layer from flat to rectangular or corrugated.We compare and analyze the heat exchange performances of SENDDCTs with the three different heat storage layers,and provide the optimization measures.The results are as follows:①According to the simulation,when the inlet water temperature is 60℃,the enhancement of the corrugated rib and rectangular rib SENDDCTs can increase by 9.3%and 12.3%,respectively,and the heat rejection rate of 132.9MW obtained by the flat SENDDCT increases respectively to 145.3MW and 149.2MW.These results prove that the cooling performance of the SENDDCT can be improved by intensifying the inlet air turbulence;②The performance enhancement of the SENDDCT with a rectangular rib was also found to be better than that using corrugated rib at inlet water temperatures of 50℃and 55℃;③Considering the overall construction cost and actual difficulty of construction,in practical applications,the design of a rectangular heat storage layer of the SENDDCT should be given priority,followed by corrugated and flat,to improve the heat exchange performance and obtain better economic benefits.The results of this research can be used to optimize the design of SENDDCT and lay a foundation for the practical application of solar-efficient air-cooling towers.
作者
何锁盈
王蕊
张治愚
闫明暄
刘严雪
高明
He Suoying;Wang Rui;Zhang Zhiyu;Yan Mingxuan;Liu Yanxue;Gao Ming(School of Energy and Power Engineering,Shandong University,Jinan 250061,China)
出处
《天津大学学报（自然科学与工程技术版）》
EI
CSCD
北大核心
2021年第4期405-410,共6页
Journal of Tianjin University：Science and Technology
基金
山东大学青年学者未来计划资助项目(2018WLJH73)
山东省自然科学基金资助项目(ZR2017QEE010)
国家自然科学基金资助项目(51776111,51676145)
国家重点研发计划资助项目(2016YFC0700404,2016YFC0700407).
关键词
太阳能增效空冷塔
空气扰流
矩形
波纹形
solar-enhanced natural-draft dry cooling tower
air turbulence
rectangular
corrugated
