太阳能热发电用高温混凝土储热系统性能分析

吴明; 李明佳; 何雅玲; 陶文铨

doi:10.7652/xjtuxb201305001

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太阳能热发电用高温混凝土储热系统性能分析

更新时间：2025-07-09

- 太阳能热发电用高温混凝土储热系统性能分析
- Thermal Performance of High Temperature Concrete Thermal Storage System for Solar Thermal Power Generation
- 西安交通大学学报 2013年47卷第5期页码：1-5+43
- 作者机构：
  
  西安交通大学热流科学与工程教育部重点实验室,西安,710049
- 作者简介：
- 基金信息：
  
  : 2012-11-10。作者简介: 吴明(1979—),男,博士生;何雅玲(通信作者),女,教授,博士生导师。基金项目: 国家重点基础研究发展计划资助项目(2013CB228304);国家自然科学基金资助项目(51176155)
- DOI：10.7652/xjtuxb201305001
  中图分类号： TK02
- 网络首发：2013-05-10，
  
  纸质出版：2013
- 稿件说明：
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吴明, 李明佳, 何雅玲, 等. 太阳能热发电用高温混凝土储热系统性能分析[J]. 西安交通大学学报, 2013,47(5):1-5+43.

Thermal Performance of High Temperature Concrete Thermal Storage System for Solar Thermal Power Generation[J]. 2013, 47(5): 1-5+43.
吴明, 李明佳, 何雅玲, 等. 太阳能热发电用高温混凝土储热系统性能分析[J]. 西安交通大学学报, 2013,47(5):1-5+43. DOI： 10.7652/xjtuxb201305001.

Thermal Performance of High Temperature Concrete Thermal Storage System for Solar Thermal Power Generation[J]. 2013, 47(5): 1-5+43. DOI： 10.7652/xjtuxb201305001.

摘要

采用修正集总热容法对太阳能热发热中混凝土储热整体系统的热性能进行研究。修正的固液换热系数将计算的适用范围扩展到大Biot数的情况。发现放热时固体混凝土和流体沿着流程方向都存在一个温跃层区域

并且随着放热的进行

温跃层逐渐向下游移动并且占据的长度也逐渐增加。分别讨论了混凝土导热系数、模块串联总长度以及储热单元当量外径与钢管内径比值对储热系统放热性能的影响。计算发现

提高混凝土导热系数可以有效提高储热系统的热性能

并且随着导热系数的增加

放热效率的增加会逐渐变慢; 增加串联总长度可以有效提高系统的热性能

但是当串联总长度大于1 km时

继续增加串联总长度对于特征固体温度分布的影响很小; 当量直径比的增加会减小温跃层区沿流程方向的温度梯度

增大温跃层区占据的长度。

Abstract

The thermal performance of a concrete thermal storage system was investigated by the lumped parameter method. The application range of the lumped parameter method was extended to large Biot numbers by using the corrected heat transfer coefficient between the solid and the fluid. The development of the thermocline region and its influence on the thermal performance of the concrete thermal storage system were examined. The effects of three parameters on the discharging performance were explored. The results show that there exists a thermocline region along the flow path

and it moves downstream and the region area increases gradually. The thermal performance of the whole system can be improved by increasing thermal conductivity of concrete but the rate of thermal performance improvement will be smaller with an increase in the conductivity. The increase in the total length of series modules can effectively enhance the system thermal performance while the influence could be ignored when the total length is greater than 1 km. Increasing the equivalent ratio of the outer diameter of the heat storage unit to the inner diameter of the steel tube will reduce the temperature gradient of the thermocline region along the flow path and increase the thermocline region area.

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references

XU Chao, WANG Zhifeng, HE Yaling, et al. Sensitivity analysis of the numerical study on the thermal performance of a packed-bed molten salt thermocline thermal storage system [J]. Applied Energy, 2012, 92(1): 65-75.

LAING D, LEHMANN D, FIB M, et al. Test results of concrete thermal energy storage for parabolic trough power plants [J]. ASME Journal of Solar Energy Engineering, 2009, 131(4): 0410071-0410076

LAING D, STEINMANN W, FIB M, et al. Solid media thermal storage development and analysis of modular storage operation concepts for parabolic trough power plants [J]. ASME Journal of Solar Energy Engineering, 2008, 130(1): 011006.

JOEL E, BRAD M, PANNEER S. Testing of high performance concrete as a thermal energy storage medium at high temperatures [C]∥Proceedings of the ASME 2011 5th International Conference on Energy Sustainability. New York, USA: ASME, 2011: 723-728.

朱教群, 李圆圆, 周卫兵, 等. 储热混凝土单元设计与储热模拟 [J]. 节能, 2009(1): 13-15.

XU Ben, LI P, CHO L C. Extending the validity of lumped capacitance method for large Biot number in thermal storage application [J]. Solar Energy, 2012, 86(6): 1709-1724.

SHITZER A, LEVY M. Transient behavior of a rock-bed thermal storage system subjected to variable inlet air temperature: analysis and experimentation [J]. ASME Journal of Solar Energy Engineering, 1983, 105(2): 200-206.

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