THERMAL MODELING OF AIR COOLED OUTDOOR DIGITAL DISPLAYS

Kim, Jeho

Title:

THERMAL MODELING OF AIR COOLED OUTDOOR DIGITAL DISPLAYS

dc.contributor.advisor	Joshi, Yogendra
dc.contributor.author	Kim, Jeho
dc.contributor.committeeMember	Zhang, Zhuomin
dc.contributor.committeeMember	Ghiaasiaan, Mostafa
dc.contributor.department	Mechanical Engineering
dc.date.accessioned	2021-01-11T17:07:45Z
dc.date.available	2021-01-11T17:07:45Z
dc.date.created	2019-12
dc.date.issued	2019-12-03
dc.date.submitted	December 2019
dc.date.updated	2021-01-11T17:07:45Z
dc.description.abstract	The thermal design process for many electronic products often minimizes the use of computational fluid dynamics and heat transfer (CFD/HT) software in favor of quick prototyping and testing to determine the thermal characteristics of the product. For large-scale products with many thermal challenges, such a strategy may be impractical. In such cases, thoroughly developed simulation models are very valuable in driving the product design. Based on this idea, a methodology in designing a reliable CFD/HT model for outdoor digital displays is described in this study. Both the surrounding ambient temperature and solar irradiance are the major contributors to a temperature rise in such displays, but most CFD/HT software packages are limited in simulating solar irradiance through semi-transparent materials and multiple surfaces. Therefore, the contribution from solar irradiance must be treated with care when creating CFD/HT models especially when an optimum number of mesh elements is used to minimize the necessary processing power and solution computation time. To best accommodate the effect of solar irradiance, in lieu of defining the solar irradiance as a heat flux, a methodology to determine the power that should be imposed on the sun-exposed vandal glasses is described. Simulation results are obtained in the range of environmental temperature/irradiance values that can be experimentally tested. The study examines variation in simulation results between mesh element sizes, meshing techniques and heat loads assigned on the vandal glass assembly. In addition, this study explores the effect of adjusting the gap distance between the vandal glass and the liquid crystal display (LCD) to see how the maximum LCD temperature and fan performance are influenced.
dc.description.degree	M.S.
dc.format.mimetype	application/pdf
dc.identifier.uri	http://hdl.handle.net/1853/64068
dc.language.iso	en_US
dc.publisher	Georgia Institute of Technology
dc.subject	Computational fluid dynamics
dc.subject	Heat transfer
dc.subject	LCD
dc.subject	MRI
dc.subject	Outdoor digital display
dc.subject	Solar irradiance
dc.title	THERMAL MODELING OF AIR COOLED OUTDOOR DIGITAL DISPLAYS
dc.type	Text
dc.type.genre	Thesis
dspace.entity.type	Publication
local.contributor.advisor	Joshi, Yogendra
local.contributor.corporatename	George W. Woodruff School of Mechanical Engineering
local.contributor.corporatename	College of Engineering
relation.isAdvisorOfPublication	63ef328b-076b-44b7-92a9-0f7dd03fa1fa
relation.isOrgUnitOfPublication	c01ff908-c25f-439b-bf10-a074ed886bb7
relation.isOrgUnitOfPublication	7c022d60-21d5-497c-b552-95e489a06569
thesis.degree.level	Masters