Carbon nanotube heat transfer fluids for solar radiant heating of buildings

Mesgari, S; Hjerrild, N; Arandiyan, H; Taylor, RA

Carbon nanotube heat transfer fluids for solar radiant heating of buildings

Mesgari, S Hjerrild, N Arandiyan, H Taylor, RA

Permalink

Publication Type:: Journal Article
Citation:: Energy and Buildings, 2018, 175 pp. 11 - 16
Issue Date:: 2018-09-15

Closed Access

	Filename	Description	Size
	1-s2.0-S0378778818308922-main.pdf	Published Version	1.36 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Mesgari, S	en_US
dc.contributor.author	Hjerrild, N	en_US
dc.contributor.author	Arandiyan, H	en_US
dc.contributor.author	Taylor, RA	en_US
dc.date.issued	2018-09-15	en_US
dc.identifier.citation	Energy and Buildings, 2018, 175 pp. 11 - 16	en_US
dc.identifier.issn	0378-7788	en_US
dc.identifier.uri	http://hdl.handle.net/10453/131444
dc.description.abstract	© 2018 Elsevier B.V. Solar-based radiant heating systems represent a sustainable, and relatively low-cost, technology to raise the temperature of the interior thermal mass of our buildings. Through the use of direct absorption solar thermal collectors, the same working fluid which absorbs the solar energy can be used to transfer the energy for storage in the thermal mass of the structure using a network of pipes embedded in concrete floors. This study investigates a promising working fluid which can be used in such systems – one which is based on multi-walled carbon-nanotubes suspended in normal base fluids. A major stumbling block affecting the wide spread use of carbon-nanotube nanofluids is their low dispersion stability at elevated temperatures, which significantly reduces the absorption capabilities of the nanofluids and could lead to clogging of the pumps used to circulate the fluids. In this paper, we report on a scalable UV-ozone (UVO) treatment technique to produce highly stable dispersions for the elevated temperatures experienced by working fluids in radiant heating systems. To probe suitability of UVO treated multi-walled carbon-nanotube (MWCNTs) for solar-assisted radiant heating systems, this paper investigates the effects of exposure time and temperature on stability, optical absorbance properties, the extent of functionalisation, and the photothermal conversion performance of UVO-treated MWCNT nanofluids. No agglomeration or degradation of the MWCNTs was observed at elevated temperatures (up to 150 °C), highlighting the stability of proposed nanofluids.	en_US
dc.relation.ispartof	Energy and Buildings	en_US
dc.relation.isbasedon	10.1016/j.enbuild.2018.07.002	en_US
dc.subject.classification	Building & Construction	en_US
dc.title	Carbon nanotube heat transfer fluids for solar radiant heating of buildings	en_US
dc.type	Journal Article
utslib.citation.volume	175	en_US
utslib.for	0907 Environmental Engineering	en_US
utslib.for	09 Engineering	en_US
utslib.for	12 Built Environment and Design	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	175	en_US

Abstract:

© 2018 Elsevier B.V. Solar-based radiant heating systems represent a sustainable, and relatively low-cost, technology to raise the temperature of the interior thermal mass of our buildings. Through the use of direct absorption solar thermal collectors, the same working fluid which absorbs the solar energy can be used to transfer the energy for storage in the thermal mass of the structure using a network of pipes embedded in concrete floors. This study investigates a promising working fluid which can be used in such systems – one which is based on multi-walled carbon-nanotubes suspended in normal base fluids. A major stumbling block affecting the wide spread use of carbon-nanotube nanofluids is their low dispersion stability at elevated temperatures, which significantly reduces the absorption capabilities of the nanofluids and could lead to clogging of the pumps used to circulate the fluids. In this paper, we report on a scalable UV-ozone (UVO) treatment technique to produce highly stable dispersions for the elevated temperatures experienced by working fluids in radiant heating systems. To probe suitability of UVO treated multi-walled carbon-nanotube (MWCNTs) for solar-assisted radiant heating systems, this paper investigates the effects of exposure time and temperature on stability, optical absorbance properties, the extent of functionalisation, and the photothermal conversion performance of UVO-treated MWCNT nanofluids. No agglomeration or degradation of the MWCNTs was observed at elevated temperatures (up to 150 °C), highlighting the stability of proposed nanofluids.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/131444