Design of a Micro-Probe For Direct Measurement of Convection Heat Transfer on a Vertical

Madadnia, J; Dehestani, D; Mehta, A; Koosha, H

Design of a Micro-Probe For Direct Measurement of Convection Heat Transfer on a Vertical

Madadnia, J Dehestani, D Mehta, A Koosha, H

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Publisher:: Science Press USA Inc
Publication Type:: Conference Proceeding
Citation:: Proceedings of the 4th ICMEM, 2011, pp. 817 - 824
Issue Date:: 2011-01

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Field	Value	Language
dc.contributor.author	Madadnia, J	en_US
dc.contributor.author	Dehestani, D	en_US
dc.contributor.author	Mehta, A	en_US
dc.contributor.author	Koosha, H	en_US
dc.contributor.editor	Batra, R	en_US
dc.contributor.editor	Qian, L	en_US
dc.contributor.editor	He, Y	en_US
dc.contributor.editor	Li, X	en_US
dc.contributor.editor	Zhou, D	en_US
dc.contributor.editor	Dresig, H	en_US
dc.contributor.editor	Morita, Y	en_US
dc.contributor.editor	Chuah, K	en_US
dc.date	2011-08-11	en_US
dc.date.issued	2011-01	en_US
dc.identifier.citation	Proceedings of the 4th ICMEM, 2011, pp. 817 - 824	en_US
dc.identifier.isbn	978-1-933100-40-1	en_US
dc.identifier.uri	http://hdl.handle.net/10453/19313
dc.description.abstract	A proximity probe with two k-type thermocouples, 1.5 mm apart, was designed, built to simultaneously measure local surface and air temperatures on the PV and to quantify local convention heat transfer coefficient. Experimental investigations of natural convection on a vertical photovoltaic (PV) panel exposed to solar radiations are presented. The variation of non-isothermal surface temperature of a PV is expressed with a second-order polynomial relation. In the absence of any correlation to predict the natural convection heat transfer coefficient on a PV, experimental results are presented in the form of variations of the local Nusselt numbers (Nuz), and the average Nusselt numbers (Nu), with Rayleigh number (Ra). The variations are best expressed with a power law correlation form of Nu=a*(Ra)^b for the range 10^6 <Ra<10^8 where a and b are determined experimentally. The power-law correlations for photovoltaic were compared with a number of correlations developed from natural convection research in laboratories. The analysis showed that for a given Rayleigh number, the predicted value of Nusselt number by the PV correlations are within the range covered by others. However, the PV correlations overestimate the Nusselt number by 20% in Rayleigh number higher than 10^6 . The work is in progress to further extend the correlation to predict the combined radiation and convection on all PV configurations, as required in the efficient design of building integrated photovoltaic (BIPV) systems.	en_US
dc.publisher	Science Press USA Inc	en_US
dc.relation.ispartof	Proceedings of the 4th ICMEM	en_US
dc.relation.ispartof	International Conference on Mechanical Engineering and Mechanics	en_US
dc.title	Design of a Micro-Probe For Direct Measurement of Convection Heat Transfer on a Vertical	en_US
dc.type	Conference Proceeding
utslib.location	NJ 08852, USA	en_US
utslib.location.activity	Suzhou, China	en_US
utslib.for	091505 Heat and Mass Transfer Operations	en_US
dc.location.activity	Suzhou, China	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
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	closed_access
pubs.consider-herdc	true	en_US
pubs.finish-date	2011-08-12	en_US
pubs.place-of-publication	NJ 08852, USA	en_US
pubs.start-date	2011-08-11	en_US

Abstract:

A proximity probe with two k-type thermocouples, 1.5 mm apart, was designed, built to simultaneously measure local surface and air temperatures on the PV and to quantify local convention heat transfer coefficient. Experimental investigations of natural convection on a vertical photovoltaic (PV) panel exposed to solar radiations are presented. The variation of non-isothermal surface temperature of a PV is expressed with a second-order polynomial relation. In the absence of any correlation to predict the natural convection heat transfer coefficient on a PV, experimental results are presented in the form of variations of the local Nusselt numbers (Nuz), and the average Nusselt numbers (Nu), with Rayleigh number (Ra). The variations are best expressed with a power law correlation form of Nu=a*(Ra)^b for the range 10^6

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http://hdl.handle.net/10453/19313