High-temperature thermal storage using a packed bed of rocks - Heat transfer analysis and experimental validation

被引：329

作者：

Haenchen, Markus ^{[2
]}

Brueckner, Sarah ^{[1
]}

Steinfeld, Aldo ^{[1
,2
]}

机构：

[1] ETH, Dept Mech & Proc Engn, CH-8092 Zurich, Switzerland

[2] Paul Scherrer Inst, Solar Technol Lab, CH-5232 Villigen, Switzerland

来源：

APPLIED THERMAL ENGINEERING | 2011年 / 31卷 / 10期

关键词：

Concentrated solar power; Thermal storage; Packed bed; Porous media; Sensible heat; 2ND LAW OPTIMIZATION; ENERGY-STORAGE; SYSTEM; FLOW; ELEMENT;

D O I：

10.1016/j.applthermaleng.2010.10.034

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

High-temperature thermal storage in a packed bed of rocks is considered for air-based concentrated solar power plants. The unsteady 1D two-phase energy conservation equations are formulated for combined convection and conduction heat transfer, and solved numerically for charging/discharging cycles. Validation is accomplished in a pilot-scale experimental setup with a packed bed of crushed steatite (magnesium silicate rock) at 800 K. A parameter study of the packed bed dimensions, fluid flow rate, particle diameter, and solid phase material was carried out to evaluate the charging/discharging characteristics, daily cyclic operation, overall thermal efficiency and capacity ratio. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1798 / 1806

页数：9

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