以某太阳能热发电站高温熔盐罐基础为研究对象,建立熔盐罐基础风机强制通风和自然通风两种温度场计算模型。以冷却风速、环境温度、海拔、通风管管径和保温层厚度为关键因素,研究罐基础土壤表面最高温度随关键因素的变化趋势。无论在强制通风还是在自然通风模式下,环境温度和海拔对两种通风模式下的罐基础温度具有类似影响。熔盐罐基础底部土壤表面最高温度随环境温度和海拔的升高而升高。熔盐罐基础在风机强制通风模式下,通风管内风速大,强制对流换热能力增强,罐基础降温明显。熔盐罐基础在自然通风模式下,熔盐罐基础土壤表面温度难以在最高环境温度下满足设计要求。在自然通风模式下,增加保温层厚度和通风管管径是降低土壤表面温度的主要途径。
Abstract
Based on a concentrated solar power （CSP） molten salt thermal energy storage project, this study takes the foundation of the hot molten salt tank as the research object. Two temperature field models are established for the molten salt tank foundation, corresponding to forced ventilation and natural ventilation, respectively. Taking wind speed, ambient temperature, altitude, ventilation duct diameter and insulation layer thickness as key factors, the variation trend of the maximum soil surface temperature under the tank foundation with these factors is analyzed. Under both forced and natural ventilation modes, ambient temperature and altitude exert similar effects on the foundation soil temperature: the maximum soil surface temperature at the bottom of the molten salt tank foundation rises with increasing ambient temperature and altitude. In the forced ventilation mode, the enhanced forced convective heat transfer leads to a significant reduction in the foundation soil temperature. Under the highest ambient temperature condition, the soil surface temperature of the tank foundation can barely meet the design requirements in the natural ventilation mode. For natural ventilation, increasing the insulation layer thickness and ventilation duct diameter is the primary measure to lower the soil surface temperature.
关键词
太阳能热发电 /
熔盐罐 /
通风管 /
强制通风 /
自然通风
Key words
concentrated solar power /
molten salt tank /
ventilation duct /
forced ventilation /
natural ventilation
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参考文献
[1] 左芳菲, 韩伟, 姚明宇. 熔盐储能在新型电力系统中应用现状与发展趋势[J]. 热力发电, 2023, 52(2): 1-9.
ZUO F F, HAN W, YAO M Y.Application status and development trend of molten salt energy storage in novel power systems[J]. Thermal power generation, 2023, 52(2): 1-9.
[2] 房彦山, 苏亮, 苏钊. 光热电站熔盐储热罐地下通风系统的数值仿真[J]. 宁夏电力, 2020(2): 58-63.
FANG Y S, SU L, SU Z.Numerical simulation of underground ventilation system of molten salt storage tank in photo-thermal power station[J]. Ningxia electric power, 2020(2): 58-63.
[3] 程虎, 苏加, 奚正稳, 等. 熔盐储罐隔热基础设计研究[J]. 工程建设与设计, 2020(7): 167-169, 172.
CHENG H, SU J, XI Z W, et al.Study on thermal insulation foundation of molten salt tank[J]. Construction & design for engineering, 2020(7): 167-169, 172.
[4] 田强, 王建平, 卜亚军. 基于热分析的高温熔盐储罐基础研究[J]. 武汉大学学报(工学版), 2017, 50(增刊1): 282-284.
TIAN Q, WANG J P, BU Y J.Study of foundation for high temperature molten salt tankbased on thermal analysis[J]. Engineering Journal of Wuhan University, 2017, 50(S1): 282-284.
[5] 梁甜, 糜又晚, 李清元, 等. 多场耦合作用下某槽式光热电站熔盐储罐基础温度分布与沉降变形[J]. 建筑技术开发, 2022, 49(5): 120-126.
LIANG T, MI Y W, LI Q Y, et al.Temperature distribution and settlement deformation of molten salt storage tank foundation of a trough type optical thermal power station under multi field coupling[J]. Building technology development, 2022, 49(5): 120-126.
[6] 易自砚, 李红星, 何邵华, 等. 高温熔盐储罐基础中陶粒的材料性能试验研究[J]. 太阳能学报, 2024, 45(7): 584-589.
YI Z Y, LI H X, HE S H, et al.Study on material properties of ceramsite in foundation of high temperature molten salt storage tank[J]. Acta energiae solaris sinica, 2024, 45(7): 584-589.
[7] 行明旭. 大型高温储罐基础隔热层的设计[J]. 化工技术与开发, 2022, 51(8): 95-98.
XING M X.Design of foundation insulation layer of large high temperature storage tank[J]. Technology & development of chemical industry, 2022, 51(8): 95-98.
[8] 顾清之. 熔盐储罐基础自然对流散热分析[J]. 上海电气技术, 2020, 13(2): 42-45.
GU Q Z.Analysis of natural convection heat dissipation of molten salt storage tank foundation[J]. Journal of Shanghai electric technology, 2020, 13(2): 42-45.
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