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Alternative Energy Systems > [L3]_Solar PV Cells > Flashcards

[L3]_Solar PV Cells Flashcards

1
Q

ENGY-775

Describe the process which is occuring in this image.

[L3]

A

A forward-biased PN junction conducts a current once the barrier voltage is overcome.

[L3]

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2
Q

ENGY-775

What is a CPVC?

[L3]

A

Concentrator Photovoltaic Cell

[L3]

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3
Q

ENGY-775

Which solar PV cell crystalline structure has a higher heat tolerance?
* Polycrystalline
* Monocrystalline

[L3]

A

Monocrystalline

[L3]

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4
Q

ENGY-775

In the reference chart provided, does the voltage increase or decrease as the outdoor temperature decreases?

[L3]

A

Increases

[L3]

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5
Q

ENGY-775

Describe the a Wet Cell Battery.

[L3]

A

A voltage potential created between two (2) electrodes in a battery acidic solution were when exposed to sunlight or radiant energy

[L3]

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6
Q

ENGY-775

How much time does it take for a photon to move from the outer most sun layer to Earth?

[L3]

A

8-minutes & 20-seconds

[L3]

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7
Q

ENGY-775

What was the module efficinecy of the first ever modern solar PV cell?

[L3]

A

Less than 1% Eff

[L3]

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8
Q

ENGY-775

Who and when invented the first electric voltaic pile ever?

[L3]

A

Count Alessandro Volta in 1799

[L3]

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9
Q

ENGY-775

How much solar energy in general is cast onto the surafce of Earth?

[L3]

A

8,000 times the amount of humanities current rate of energy consumption

[L3]

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10
Q

ENGY-775

What is a SCPV?

[L3]

A

Solar Concentrator Photovoltaic Cell

[L3]

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11
Q

ENGY-775

What is the most efficient solar PV cell listed by NREL not utilizing a concentrator?

[L3]

A

37.9% by Sharp (IMM)

[L3]

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12
Q

ENGY-775

What is the voltage in the reference chart for 1.5 W @ +75ºC?

[L3]

A

0.45 Volts

[L3]

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13
Q

ENGY-775

Who discovered the Photovoltaic Effect and when?

[L3]

A

Edmond Becquerel in 1839

[L3]

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14
Q

ENGY-775

Who invented the architecture of the first modern solar PV cell and when?

[L3]

A

Charles Edgar Fritts in 1883

[L3]

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15
Q

ENGY-775

How many years does it take for a photon to move from the center of the sun to the outer sun layer?

[L3]

A

Between 10,000 to 20,000 years

[L3]

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16
Q

ENGY-775

What are the two (2) best items to increase the life span and power output of a solar PV cell?

[L3]

A
  1. PV Panel Cooling
  2. Fresnel Lens

[L3]

17
Q

ENGY-775

What does Photovoltaic mean in greek?

[L3]

A

Electrical Potential Difference of Light

[L3]

18
Q

ENGY-775

What is the equation for light traveling in photons with energy?

[L3]

A

E = h x f

[L3]

19
Q

ENGY-775

True or False: Are all photons absorbed on solar panels?

[L3]

A

False

[L3]

20
Q

ENGY-775

How many years later did solar PV cell efficiency increase over 4%? By whom? When?

[L3]

A
  • 71 years later
  • Bell Laboratories, Darly Chapin, Calvin Fuller, & Gerald Pearson
  • 1954

[L3]

21
Q

ENGY-775

The conversion of solar light energy directlyinto electricity in a solid state device is known as what?

[L3]

A

Solar Photovoltaic Cells

[L3]

22
Q

ENGY-775

What is the traditional photovoltaic cell substrate material used in manufacturing?

[L3]

A

Silicon

[L3]

23
Q

ENGY-775

What is the most efficient solar PV cell listed by NREL utilizing a concentrator?

[L3]

A

46.0% by Fraunhofer ISE/Soitec

[L3]

24
Q

ENGY-775

Define a PN-junction.

[L3]

A

PN junctions are fabricated from a monocrystalline piece of semiconductor with both a P-type and N-type region in proximity at a junction. The transfer of electrons from the N side of the junction to holes annihilated on the P side of the junction produces a barrier voltage.

[L3]

25
Q

ENGY-775

List three (3) different ways to remove heat from solar PV cells.

[L3]

A
  1. Large Thin Fin Aluminium Thermal Heat Sinks
  2. Water Cooling Chamber Heat Sink
  3. High Air-Flow Convection

[L3]

26
Q

ENGY-775

What is the theoretical efficiency of a 6-layer multi-junction solar PV cell?

[L3]

A

η ≈ 68%

[L3]

27
Q

ENGY-775

List the four (4) layers of the sun?

[L3]

A
  1. Photosphere
  2. Convective Zone
  3. Radiative Zone
  4. Nucleus

[L3]

28
Q

ENGY-775

What is the base compound which silicon PV waffers are created from?

[L3]

A

Sand (SiO2)

[L3]

29
Q

ENGY-775

What are the names of these three (3) types of Solar PV panels?

[L3]

A
  1. (A) Thin Film
  2. (B) Monosilicon
  3. (C) Polysilicon

[L3]

30
Q

ENGY-775

What is the name of the inventor for the unit of measurement named Volt?

[L3]

A

Italian Physicist Alessandro Volta

[L3]

Alternative Energy Systems (6 decks)

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