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dc.contributor.authorChen, Qian
dc.contributor.authorOh, Seung Jin
dc.contributor.authorBurhan, Muhammad
dc.contributor.authorPark, Sung-Yong
dc.date.accessioned2020-06-01T07:24:42Z
dc.date.available2020-06-01T07:24:42Z
dc.date.issued2020-05-18
dc.date.submitted2020-02-16
dc.identifier.citationChen, Q., Oh, S. J., & Burhan, M. (2020). Design and optimization of a novel electrowetting-driven solar-indoor lighting system. Applied Energy, 269, 115128. doi:10.1016/j.apenergy.2020.115128
dc.identifier.issn0306-2619
dc.identifier.doi10.1016/j.apenergy.2020.115128
dc.identifier.doi10.1016/j.apenergy.2020.116279
dc.identifier.urihttp://hdl.handle.net/10754/662941
dc.description.abstractConsidering the high level of energy consumption for lighting in commercial buildings, the use of solar energy for daylighting is appealing more interests at both research and industrial levels. This study presents a novel daylighting system working on the principles of electrowetting. It integrates electrowetting-driven liquid prisms with existing optical fiber daylighting systems, which not only facilitates flexible regulation of the lighting power but also allows for recovery of excess sunlight that is not used for daylighting. An improved design is firstly proposed for the liquid prism to simplify the fabrication processes, increase its reliability, and facilitate easier maintenance. Liquid prisms are then fabricated using the proposed design, and different functionalities are demonstrated. Based on the optimized component design, the illumination performance and energy-saving potential of the proposed daylighting system is quantified using long-term climatological data. Under the climatic conditions of Singapore, a stand-alone system with 1 m2 solar collector is able to provide an annual illumination time of more than 2260 h for a 10 m2 office. The energy consumption for driving the prism is found to be negligible compared with the illumination power provided. Additionally, recovery of the excess energy would further improve the illumination time by up to 95%, while the energy cost is reduced by 20%.
dc.description.sponsorshipThis work is gratefully supported by (1) Ministry of Education (MOE), Singapore (R-265-000-588-114 and R-265-000-597-112), (2) the Water Desalination and Reuse Center (WDRC), King Abdullah University of Science and Technology (KAUST), and (3) Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2019R1F1A1061693).
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0306261920306401
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Applied Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Energy, [269, , (2020-05-18)] DOI: 10.1016/j.apenergy.2020.115128 . © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleDesign and optimization of a novel electrowetting-driven solar-indoor lighting system
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.identifier.journalApplied Energy
dc.rights.embargodate2022-05-18
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Mechanical Engineering, National University of Singapore, Block EA, #07-08, 9 Engineering Drive 1, Singapore 117576, Singapore
dc.contributor.institutionKorean Institute of Industrial Technology, 102 Jejudaehak-ro, Jeju Special Self-governing Province 63243, Republic of Korea
dc.identifier.volume269
dc.identifier.pages115128
kaust.personChen, Qian
kaust.personBurhan, Muhammad
dc.date.accepted2020-05-03
dc.identifier.eid2-s2.0-85084736410
kaust.acknowledged.supportUnitWater Desalination and Reuse Center (WDRC)
dc.date.published-online2020-05-18
dc.date.published-print2020-07


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