Experimental investigation on heat extraction from a rock bed heat storage system for high temperature applications

Journal of Energy in Southern Africa. 2016;27(2):30-37 DOI 10.17159/2413-3051/2016/v27i2a1339

 

Journal Homepage

Journal Title: Journal of Energy in Southern Africa

ISSN: 1021-447X (Print); 2413-3051 (Online)

Publisher: University of Cape Town

Society/Institution: University of Cape Town

LCC Subject Category: Technology: Mechanical engineering and machinery: Energy conservation | Geography. Anthropology. Recreation: Environmental sciences

Country of publisher: South Africa

Language of fulltext: English

Full-text formats available: PDF

 

AUTHORS


Denis Okello (Department of Physics, Makerere University, PO Box 7062, Kampala)

Ole J Nydal (Department of Energy and Process Engineering, Norwegian University of Science and Technology, PO Box 7491, Trondheim)

Karidewa Nyeinga (Department of Physics, Makerere University, PO Box 7062, Kampala)

Eldad J K Banda (Department of Physics, Makerere University, PO Box 7062, Kampala)

EDITORIAL INFORMATION

Double blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 18 weeks

 

Abstract | Full Text

Solar energy is available in an intermittent way, and integrating an energy storage system with solar energy collection devices may promote uninterrupted supply of energy in the absence of the availability of solar energy. It has been shown that heat can be stored using rocks packed in a bed, but limited work has been reported on heat extraction from a charged rockbed. This paper reports on the heat extraction from a charged rock bed. Discharging tests were performed under different air flow conditions and initial bed temperatures. Without the blower, the discharging rate is very slow. The discharging rate can be increased, and the cooking time controlled by adjusting the air speed through the rock-bed system.