Solar Panel PCM Project[1] Update May 26[1]

8/2/2019 Solar Panel PCM Project[1] Update May 26[1]

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Hiraku KobayashiLihn NgyuenFarid Sarraf

Aaron Stafford

Faculty Advisor:Dr. Yam Lee

Chemical and Materials Engineering Dept.


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2REN

21

Renewables2010GlobalStatusReport(www.ren21.net)

Grid-connected solar photovoltaic (PV)

fastest growing power generation technology

Current solar panel technology, for residentialapplications are only about 15% efficient.


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Weather Conditions ,Geography & Panelplacement must be considered because of

temperature variation.

The campus celebrates the new Amonix 7700 at the Lyle Center. Polycentric. Sept 30

2010

AspenSolar.Teachengineering.(c)Jan5,

2011


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ISC increases slightly, while VOCdecreasesmore significantly

Solar cell Isc and Voc. Wikimedia. October 19 2008


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5

Solar cell I-V curve as a function of temperature. Wikimedia. October 19 2008
http://www.solarpower2day.net/images/9.png


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Install a temperature-dependent chargecontroller or a maximum power tracker1

Apply cooling mechanism to back of PVarraysour project 1

Reference [1]:Min-Jung Wu, Erik J. Timpson, and Steve E. Watkins. Temperature Considerations in Solar Arrays.University of Missouri. Department of Electrical and Computer Engineering. 2004


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Active Cooling1-requires some external power source

e.g Fans, Cooling fluid via pump

Passive Cooling1-requires no added power

e.g Air flow, Phase Change Material

Reference [1]: Photovoltaic Efficiency. Teachengineering.org. Jan 5 2011


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Encapsulated PCM. Microtechlabs.(c) 2011


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Phase I: Compare Efficiencies of two PVPanels(Metal & Acrylic Backing) withvarying Temperature

Phase II: Investigate the effectiveness of

PCM to mitigate power loss due toincreased temperature.


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Compare the two panels efficiency without

PCM

The PV panels will be placed in a test cellunder fixed lighting.

Values to measure: Temperature, Current,Voltage, & Incident radiation


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Incident Light Results


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Temperature Plots

Metal Backed Panel

Acrylic Backed Panel


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Temperature Plots

Metal Backed Panel

Acrylic Backed Panel


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I-V Curve


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Power Curve

T (oC) P (mW)26.35 88028.9 86230.4 85831.66 85632.45 85233.2 83633.25 828


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Attach PCM filled container to the back of the

PV Panel

Develop Temperature and IV curves


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Acrylic Glass

PCM

AdiabaticBoundary

Adiabatic

Boundary

Adiabatic

Boundary

PV Panel

IT h

T


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Figure 1: Metal Backed Panel withPCM Container

Figure 2: Experimental test unit


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Temperature Plots

Front of Panel Back of Panel

PCM Ambient


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I-V Curve


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P-V curve


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625

630

635

640

645

650

655

660

665

670

675

24 26 28 30 32 34 36 38

Pmax

(mW)

T (oC)

Maximum Powers of Metal Backing PV Panel withPCM at Different Temperatures


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IV & Temperature curves display greaterefficiency for Acrylic backed panel

PCM tests are inconclusive- Tests show PCM has negligible effect


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Problem:Generating clearer IV-curves with

changing temperatures requires moreelaborate and expensive equipment.

Solution:Equipment now available throughEE department

Problem:Halogen lamp overheated and requiredfrequent replacement

Solution: Future teams should consider usinghalide lights alongside betterequipment.


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We would like to thank Dr. Yam Lee for hissupport and direction throughout thisproject. Additionally we would like to thank

Dr. Nelson and Dr. Anz for their advice.Finally we would like to thank JohnClothier for his donation of two PV Panels.


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1. Min-Jung Wu, Erik J. Timpson, and Steve E. Watkins.Temperature Considerations in Solar Arrays. University ofMissouri. Department of Electrical and Computer Engineering.2004

2. Photovoltaic Efficiency. Teachengineering.org. Jan 5 2011


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Questions?

Documents

Solar Panel PCM Project[1] Update May 26[1]