Photovoltaic system performance enhancement: Validated modeling methodologies for the improvement of PV system design

dc.contributor.authorAndrews, Roberten
dc.contributor.departmentMechanical and Materials Engineeringen
dc.contributor.supervisorPearce, Joshua M.en
dc.contributor.supervisorPollard, Andrewen
dc.date2015-06-02 19:48:18.104's University at Kingstonen
dc.descriptionThesis (Ph.D, Mechanical and Materials Engineering) -- Queen's University, 2015-06-02 19:48:18.104en
dc.description.abstractPhotovoltaic (PV) energy generation is rapidly expanding, driven by decreases in capital and operational costs. Modeling of expected energy output is a major factor affecting the operation and construction of these systems, and the objective of this thesis is to present methodologies and tools which improve PV system modeling. Initially, the modeling of short circuit current in PV modules is investigated and demonstrates techniques for filtering of data from fielded PV modules, allowing performance metrics traditionally derived in laboratory tests to be derived from data collected from stationary outdoors systems. The spectral component of irradiance is important for PV system modeling, and dataset of hourly spectral irradiance from 250nm-2500nm was collected from November 2012 to April 2014. This data set can be used to validate the derived equations from the previous chapter, and is aimed to enable improved modeling of spectra using an iterative methodology. Albedo, or reflected, irradiance is then considered, where effects of spectral mismatch can be substantial. It was found that spectral mismatch error can lead to modeling errors ranging from 0.04 % to 10.5 % as PV module tilt increases from 25 degrees to 90 degrees from the horizontal, and methods of predicting and modeling this albedo spectral mismatch were presented. Detailed methods for identifying snowfall losses were investigated, and provided results from two typical winters in 2010 and 2011. It was found that there is not a simple correlation between meteorological factors and snowfall losses, which warrant further investigation in the the modeling an prediction of this phenomenon. Consequently, an empirical lag 1 time-series model is proposed, based on the stochastic variation in snow depth that is able to predict daily snow fall losses within 3%. Finally, an investigation is undertaken into the use of planar diffuse reflectors for albedo augmentation. It was found experimentally that such a system can increase system output by 18%. A physically based non-empirical model was developed that predicted system output with a bias error of 1%, and was used to perform a sensitivity analysis that demonstrated a yearly energy increase of 30% is achievable at the latitude of Kingston, Ontario.en
dc.relation.ispartofseriesCanadian thesesen
dc.rightsQueen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canadaen
dc.rightsProQuest PhD and Master's Theses International Dissemination Agreementen
dc.rightsIntellectual Property Guidelines at Queen's Universityen
dc.rightsCopying and Preserving Your Thesisen
dc.rightsCreative Commons - Attribution - CC BYen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectSolar Energyen
dc.subjectPV systemsen
dc.subjectPV modellingen
dc.titlePhotovoltaic system performance enhancement: Validated modeling methodologies for the improvement of PV system designen
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