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Alternative Energy Systems > [L2]_Solar Thermal Energy > Flashcards

[L2]_Solar Thermal Energy Flashcards

1
Q

ENGY-775

What type of gases are used to insulate between window panes?

[L2]

A

Inert gases such as Krypton & Argon

[L2]

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2
Q

ENGY-775

What is the typical energy savings % for a Certified Passive structure versus an older building?

[L2]

A

Approximately greater than 80%

[L2]

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3
Q

ENGY-775

How many years was large frame glass window making manufacturing technques lost?

[L2]

A

One (1) Millennium

[L2]

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4
Q

ENGY-775

Name the four (4) types of Active Solar Heating Systems.

[L2]

A
  1. Unglazed Panel Solar Collectors
  2. Flat Plate Air Solar Collectors
  3. Glazed Flat Plate Water Solar Collectors
  4. Heat Pipe/Solar Evacuated Tube Collectors

[L2]

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5
Q

ENGY-775

Define Daylighting Factor (DF)

[L2]

A

The ratio of instantaneous lighting level on a specific point inside a room to that occurring simultaneously outside in an unobstructed position.

[L2]

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6
Q

ENGY-775

Name three (3) qualities required for overall PassiveHaus structure.

[L2]

A
  1. Wall and Roof insulation of at a minimum thickness of 200mm
  2. Triple-glazed windows w/Low-E film and inert insulating gas
  3. Mechanical Ventilation utilizing HRVs or ERVs

[L2]

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7
Q

ENGY-775

What are the two (2) most important parameters for installing solar collectors or panels?

[L2]

A
  1. Orientation
  2. Tilt

[L2]

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8
Q

True or False: Convection heat transfer can occur inside a vacuum.

[L2]

A

False.

[L2]

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9
Q

ENGY-775

List five (5) traditional Daylighting techniques.

[L2]

A
  1. Shallow-Floor Plan Design
  2. Light Well
  3. Solar Tubes
  4. Tall Windows
  5. Task Lighting

[L2]

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10
Q

ENGY-775

What is the easiest way to maximize the transmittance level of glass?

[L2]

A

By lowering the iron content in the glass.

[L2]

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11
Q

ENGY-775

Name the three (3) components which comprise LUX.

[L2]

A
  1. Sky Component (SC) is direct light from a patch of sky visible at the point considered.
  2. External Reflected Component (ERC) is the light reflected from an exterior surface and then reaching the point considered.
  3. Internal Reflected Component (IRC) is the light entering through the window but reaching the point only after reflection from and internal surface.

[L2]

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12
Q

ENGY-775

What is the definition of Conduction?

[L2]

A

The transfer of heat from a hotter region to a colder region via a solid material.

[L2]

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13
Q

ENGY-775

What civilization invented the first large frame glass windows?

[L2]

A

Roman Empire

[L2]

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14
Q

ENGY-775

What is a CSP?

[L2]

A

Concentrating Solar Power

[L2]

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15
Q

ENGY-775

Name the two (2) components which comprise DF.

[L2]

A
  1. Ei is the illuminance due to daylight at a point on the indoors working plane.
  2. Eo is the outdoor illuminance on a horizontal plane from an unobstructed hemisphere of sky.

[L2]

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16
Q

ENGY-775

True or False: In the northern hemisphere during the winter maximum solar gain is achieved with the least amount of tilt.

[L2]

A

False.

[L2]

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17
Q

ENGY-775

What is the definition of Solar Thermal Energy?

[L2]

A

A form of technology that harnesses and collects the sun’s radiated energy to generate thermal energy for various forms of systems.

[L2]

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18
Q

ENGY-775

What is the definition of Convection?

[L2]

A

The rate of heat transfer between two (2) mediums such as air and water.

[L2]

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19
Q

ENGY-775

Name this type of Heat Transfer.

[L2]

A

Convection

[L2]

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20
Q

ENGY-775

  • What is the name of this Active Solar Heating System?
  • What is it used for?

[L2]

A

Unglazed Panel Solar Collector. Utilized for preheating water for swimming pools due to a few degrees above ambient temperature.

[L2]

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21
Q

ENGY-775

Define Thermal Conductivity

[L2]

A

The rate at which heat passes through a material.

[L2]

22
Q

ENGY-775

What is this?

[L2]

A

Light Well

[L2]

23
Q

ENGY-775

What is this?

[L2]

A

Solar Tube

[L2]

24
Q

ENGY-775

Define PassivHaus.

[L2]

A

A building standard developed in Germany through the 1990s with a focus on the importance of a high quality building envelope and overall air-tightness.

[L2]

25
Q

ENGY-775

Name three (3) design criteria required for Direct Solar Gain Passive Buildings.

[L2]

A
  1. Largest glazing must be south facing
  2. Envelope shall be of heavyweight construction for thermal storage
  3. Envelope shall have thick exterior insulation installed

[L2]

26
Q

ENGY-775

What is the difference between an HRV and an ERV unit?

[L2]

A

An HRV provides sensible heat transfer energy recovery between two (2) airstreams while an ERV provides both sensible and latent energy recovery.

[L2]

27
Q

ENGY-775

List four (4) benefits of Daylighting Design

[L2]

A
  1. Improves visual comfort for the user
  2. Increased productivity
  3. Better thermal comfort
  4. Reduction of greenhouse gas emissions

[L2]

28
Q

ENGY-775

Which is better for a window to have a higher or lower U-value?

[L2]

A

Lower.

[L2]

29
Q

ENGY-775

What is the best location on Earth to absorb the most solar energy?

[L2]

A

The equator

[L2]

30
Q

ENGY-775

What is the typical temperature of the surface of the sun?

[L2]

A

6,000 degrees (C)

[L2]

31
Q

ENGY-775

  • What is the name of this Active Solar Heating System?
  • What is it used for?

[L2]

A

Heat Pipe/Solar Evacuated Tube Collectors. Utilizing heat pipe orientation to maximize heat transfer efficiently.

[L2]

32
Q

What is the best tool used to measure total solar energy incidents?

[L2]

A

Solarimeters

[L2]

33
Q

ENGY-775

Low-E film window coatings are installed on what side of the window pane?

[L2]

A

Inner pane between glass panes.

[L2]

34
Q

ENGY-775

What is the formula for heat transfer?

[L2]

A

Q = U x ∆T

[L2]

35
Q

ENGY-775

Name the four (4) types of Solar Power Generation system.

[L2]

A
  1. Fresnel
  2. Parabolic
  3. Point Focus
  4. Updraft Tower

[L2]

36
Q

ENGY-775

What is the target building heat load reduction to earn the title of Passive House PREMIUM?

[L2]

A

90% Heat Loss Energy Reduction

[L2]

37
Q

ENGY-775

What are the three (3) types of Heat Transfer?

[L2]

A
  1. Conduction
  2. Convection
  3. Radiation

[L2]

38
Q

ENGY-775

What is the typical end goal of PassiveHaus?

[L2]

A

Designing a superinsulated structure to reduce the need of a conventional heating system up to 90% less.

[L2]

39
Q

ENGY-775

  • What is the name of this Active Solar Heating System?
  • What is it used for?

[L2]

A

Flat Plate Air Solar Collector. Utilized for crop drying in agriculture.

[L2]

40
Q

ENGY-775

How much electrical power is radiated on 1-SQM of clear surface area?

[L2]

A

1-Kilowatt (kW)

[L2]

41
Q

ENGY-775

How many types of heat transfer occurs through a window assembly?

[L2]

A

Three (3) types

[L2]

42
Q

ENGY-775

What is CR?

[L2]

A

Concentration Ratio

[L2]

43
Q

ENGY-775

  • What is the name of this Active Solar Heating System?
  • What is it used for?

[L2]

A

Glazed Flat Plate Water Solar Collector. Utilized for low cost domestic hot water or space heating applications.

[L2]

44
Q

ENGY-775

What is Transmittance?

[L2]

A

The fraction of light energy that passes through an object or body.

[L2]

45
Q

ENGY-775

What is this?

[L2]

A

SIP (Structurally Insulated Panel)

[L2]

46
Q

ENGY-775

What are the four (4) main types of Solar Thermal Energy?

[L2]

A
  1. Active Solar Thermal
  2. Passive Solar Thermal
  3. Daylighting
  4. Solar Thermal Engine

[L2]

47
Q

What is the definition of Radiation?

[L2]

A

The transfer of heat without the need of a medium; no air nor water required.

[L2]

48
Q

ENGY-775

What type of Solar Thermal Energy does a Trombe Wall fall under?

[L2]

A

Daylighting

[L2]

49
Q

ENGY-775

Name the two (2) types of solar energy radiated on the earth’s surface.

[L2]

A
  1. Diffuse Radiation
  2. Direct Radiation

[L2]

50
Q

ENGY-775

What is Overshading?

[L2]

A

The possibility of buildings overshadowing an adjacent structure blocking required heat gain.

[L2]

Alternative Energy Systems (6 decks)

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