Photovoltaic translation equations: A new approach. Final subcontract report

Anderson, A.

doi:10.2172/177401

Cited by 42 publications

(47 citation statements)

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“…However, outdoor conditions differ, and sometimes the irradiance is well below this reference. Work by Anderson [59], has shown that translating to STC from low irradiance values and high temperature comes with lower levels of accuracy. In this present study, effort was therefore made to obtain I-V measurements at irradiance levels that were as close as possible to 1000 W/m 2 .…”

Section: Calculations and Data Analysismentioning

confidence: 99%

Reliability and Degradation of Solar PV Modules—Case Study of 19-Year-Old Polycrystalline Modules in Ghana

et al. 2017

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Abstract:Fourteen (14) rack-mounted polycrystalline modules installed on the concrete roof of the solar energy applications laboratory at the Kwame Nkrumah University of Science and Technology (KNUST) in Ghana, a hot humid environment, were assessed after 19 years of continuous outdoor exposure. The physical state of the modules was documented using a visual inspection checklist. They were further assessed by current-voltage (I-V) characterization and thermal imaging. The modules were found to be in good physical state, except some bubbles on front side and minor discolouration/corrosion at edge of the cells. Compared with reference values, the performance decline of the modules observed over the exposure period was: nominal power (P nom ), 21% to 35%; short circuit current (I sc ), 5.8% to 11.7%; open circuit voltage (V oc ) 3.6% to 5.6% and 11.9% to 25.7% for fill factor (FF). It is hoped that this study will provide some helpful information to project developers, manufacturers and the research community on the long-term performance of PV modules in Ghana.

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Section: Calculations and Data Analysismentioning

confidence: 99%

Reliability and Degradation of Solar PV Modules—Case Study of 19-Year-Old Polycrystalline Modules in Ghana

et al. 2017

View full text Add to dashboard Cite

show abstract

“…However, outdoor conditions differ, and sometimes the irradiance is well below this reference. Work by Anderson [57], has shown that translating to STC from low irradiance values and high temperature comes with lower levels of accuracy. In this present study, effort was, therefore, made to obtain I-V measurements at irradiance levels that were as close as possible to 1000 W/m 2 .…”

Section: Rs Is Series Resistance (ω) (Default Value Is 0)mentioning

confidence: 99%

Reliability and Degradation of Solar PV Modules—Case Study of 19-Year Old Polycrystalline Modules in Ghana

Quansah¹,

Adaramola²,

Takyi³

et al. 2017

Preprint

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Fourteen (14) rack-mounted polycrystalline modules installed on the concrete roof of the solar energy applications laboratory at the Kwame Nkrumah University of Science and Technology (KNUST) in Ghana, a hot humid environment were assessed after 19 years of continuous outdoor expodure. The physical state of the modules was documented using a visual inspection checklist.They were further assessed by current-voltage (I-V) characterization and thermal imaging. The modules were found to be in good physical state, except some bubbles on front side and minor discolouration/corrosion at edge of the cells. Compared with reference values, the performance decline of the modules observed over the exposure period was: nominal power (Pnom), 21% to 35%; short circuit current (Isc), 5.8% to 11.7%; open circuit voltage (Voc) 3.6% to 5.6% and 11.9% to 25.7% for fill factor (FF). It is hoped that this study will provide some helpful information to project developers, manufacturers and the research community on the long-term performance of PV modules in Ghana.

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“…According to Anderson's method [15], each point in the I-V curve can be translated to STC using the following equations for each I-V pair:…”

Section: Performance Degradationmentioning

confidence: 99%

Degradation Effects in sc -‐ Si PV Modules Subjected to Natural and Induced Ageing after Several Years of Field Operation

Kaplani¹

2012

JESTR

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This paper presents ageing effects observed in sc--Si PV modules operating in field conditions for 18 and over 22 years. The effects of both natural ageing processes and induced ageing by external agents, causing partial or total shading of cells for a prolonged period of time, are examined. Optical degradation effects observed through visual inspection include discoloration of the EVA, degradation of the AR coating, degradation of the interface between the cell and encapsulant, corrosion of busbars and fingers, and tears, bubbles and humidity ingress at the back surface of the modules. Thermal degradation effects examined via IR thermography reveal the existence of hot cells, hotspots on the busbars, and colder bubbles. Modules' power and performance degradation is assessed through I--V curve analysis. Results show naturally aged modules to exhibit milder ageing effects than modules subjected to induced ageing, an outcome also supported by their power degradation ratio.

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Photovoltaic translation equations: A new approach. Final subcontract report

Cited by 42 publications

References 0 publications

Reliability and Degradation of Solar PV Modules—Case Study of 19-Year-Old Polycrystalline Modules in Ghana

Reliability and Degradation of Solar PV Modules—Case Study of 19-Year-Old Polycrystalline Modules in Ghana

Reliability and Degradation of Solar PV Modules—Case Study of 19-Year Old Polycrystalline Modules in Ghana

Degradation Effects in sc -‐ Si PV Modules Subjected to Natural and Induced Ageing after Several Years of Field Operation

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Photovoltaic translation equations: A new approach. Final subcontract report

Cited by 42 publications

References 0 publications

Reliability and Degradation of Solar PV Modules—Case Study of 19-Year-Old Polycrystalline Modules in Ghana

Reliability and Degradation of Solar PV Modules—Case Study of 19-Year-Old Polycrystalline Modules in Ghana

Reliability and Degradation of Solar PV Modules&mdash;Case Study of 19-Year Old Polycrystalline Modules in Ghana

Degradation Effects in sc -­‐ Si PV Modules Subjected to Natural and Induced Ageing after Several Years of Field Operation

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Product

Resources

About

Reliability and Degradation of Solar PV Modules—Case Study of 19-Year Old Polycrystalline Modules in Ghana

Degradation Effects in sc -‐ Si PV Modules Subjected to Natural and Induced Ageing after Several Years of Field Operation