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Infrared study of dew harvesting cacti spines

Tegwen Malik Orcid Logo, Tegwen Malik, Robert Marc Clement, David Gethin, Will Krawszik, Andrew R Parker, Roderick Thomas Orcid Logo, Marc Clement

Thermology International, Volume: 25, Issue: 1, Pages: 7 - 13

Swansea University Authors: Tegwen Malik Orcid Logo, Roderick Thomas Orcid Logo, Marc Clement

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Abstract

The focus of this study was to gain further understanding on the thermodynamic behaviour of the dew and non-dew harvesting spines of cacti. Four species of cacti were chosen, three that were known to harvest dew on their spines and one that does not. The temperature gradient of the spines of the mos...

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Published in: Thermology International
ISSN: 1560-604x
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa40808
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Abstract: The focus of this study was to gain further understanding on the thermodynamic behaviour of the dew and non-dew harvesting spines of cacti. Four species of cacti were chosen, three that were known to harvest dew on their spines and one that does not. The temperature gradient of the spines of the most efficient dew harvesting species, Copiapoa cinerea var. haseltoniana, and the IR emissivity of the cactus spines for all four species were determined. When placed outdoors, around the hours of sunrise and sunset, the tips of the spines of C. cinerea appeared constantly warmer than their base or mid-sections, even during the cooling hours of sunset. Ferocactus wislizenii, which does not harvest dew on its spines, was found to have the lowest spine emissivity of 0.89 ± 0.009.et.
Keywords: Thermography, Water Harvesters, Dew, Cacti, Emissivity, Infra-red
College: Faculty of Humanities and Social Sciences
Issue: 1
Start Page: 7
End Page: 13

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