0
Research Papers

Investigation of a High-Temperature Packed-Bed Sensible Heat Thermal Energy Storage System With Large-Sized Elements

[+] Author and Article Information
Sarada Kuravi

Department of Mechanical and
Aerospace Engineering,
Florida Institute of Technology,
Melbourne, FL 32901
e-mail: skuravi@fit.edu

Jamie Trahan

e-mail: jltrahan@mail.usf.edu

Yogi Goswami

e-mail: goswami@usf.edu

Chand Jotshi

e-mail: chand1@usf.edu

Elias Stefanakos

e-mail: estafana@usf.edu
Clean Energy Research Center,
University of South Florida,
Tampa, FL 33620

Nitin Goel

SunBorne Energy Inc.,
Gurgaon 122001, India
e-mail: nitin.goel@sunborneenergy.com

Contributed by the Solar Energy Division of ASME for publication in the Journal of Solar Energy Engineering. Manuscript received September 23, 2012; final manuscript received March 1, 2013; published online June 25, 2013. Editor: Gilles Flamant.

J. Sol. Energy Eng 135(4), 041008 (Jun 25, 2013) (9 pages) Paper No: SOL-12-1247; doi: 10.1115/1.4023969 History: Received September 23, 2012; Revised March 01, 2013

A high-temperature, sensible heat thermal energy storage (TES) system is designed for use in a central receiver concentrating solar power plant. Air is used as the heat transfer fluid and solid bricks made out of a high storage density material are used for storage. Experiments were performed using a laboratory-scale TES prototype system, and the results are presented. The air inlet temperature was varied between 300 °C to 600 °C, and the flow rate was varied from 50 cubic feet per minute (CFM) to 90 CFM. It was found that the charging time decreases with increase in mass flow rate. A 1D packed-bed model was used to simulate the thermal performance of the system and was validated with the experimental results. Unsteady 1D energy conservation equations were formulated for combined convection and conduction heat transfer and solved numerically for charging/discharging cycles. Appropriate heat transfer and pressure drop correlations from prior literature were identified. A parametric study was done by varying the bed dimensions, fluid flow rate, particle diameter, and porosity to evaluate the charging/discharging characteristics, overall thermal efficiency, and capacity ratio of the system.

Copyright © 2013 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Packed bed (left); element “m” of packed bed (right) [41]

Grahic Jump Location
Fig. 2

Individual brick dimensions

Grahic Jump Location
Fig. 3

Isometric view of brick assembly

Grahic Jump Location
Fig. 4

Location of thermocouples to measure temperatures of brick surface, brick center, air temperature along the rows, and columns center of air channel

Grahic Jump Location
Fig. 5

Schematic diagram of storage system

Grahic Jump Location
Fig. 6

Experimental setup

Grahic Jump Location
Fig. 7

Estimated percent heat lost as a function of insulation layer thickness in 48 h during standby mode

Grahic Jump Location
Fig. 8

Inlet air temperature at different mass flow rates and with different insulation thicknesses

Grahic Jump Location
Fig. 9

Air temperature at top of bed entering each column during charging mode. Mass flow rate is 0.0447 kg/s; insulation thickness is 0.0508 m.

Grahic Jump Location
Fig. 10

Air temperature at top of bed entering in each column during charging mode for mass flow rate of 0.0447 kg/s and insulation thickness of 0.203 m

Grahic Jump Location
Fig. 11

Air temperature in row 2 and row 4 for each column. Air mass flow rate is 0.0447 kg/s, and insulation thickness is 0.203 m (8 in.).

Grahic Jump Location
Fig. 12

Average brick temperature at different rows within the storage bed for charging and discharging mode. Air mass flow rate is 0.0447 kg/s, and insulation thickness is 0.203 m.

Grahic Jump Location
Fig. 13

Air temperature of column 5 for all rows within the storage bed for charging and discharging mode. Air mass flow rate is 0.0447 kg/s, and insulation thickness is 0.203 m.

Grahic Jump Location
Fig. 14

Average brick temperature at different levels within the bed for charging and standby mode. Mass flow rate during charging is 0.0385 kg/s, and insulation thickness is 0.0508 m (2 in.).

Grahic Jump Location
Fig. 15

Temperature of air at different rows (mass flow rate 0.0447 kg/s)

Grahic Jump Location
Fig. 16

Temperature of bricks at different rows (mass flow rate 0.0447 kg/s)

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In