TEC 3638 Midterm

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267151
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TEC 3638 Midterm
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2014-03-19 18:16:34
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  1. Who is the "father" of AT?
    Gandhi
  2. What were Gandhi's policies?
    • - Non-violence and non-cooperation
    • - Against oppressive taxation
    • - Salt march
    • - SWADESHI
  3. What is Swadeshi?
    • - local self-sufficiency
    • - home economy
    • - local power
    • - production by the masses -> production, producers, process
  4. Who is the founder of AT?
    E.F. Schumacher
  5. Developed ideas from what kind of economics?
    Buddhist Economics
  6. What kind of tech is small-scale, inexpensive, labor-intensive, compatible with human needs, and non-violent?
    Intermediate technology
  7. Schumacher's four propsitions
    • - Live where you work
    • - Cheap manufacturing
    • - Simple production
    • - Local materials
  8. Radio invented by Trevor Baylis that promotes health education, agricultural, political, news etc.
    BayGen wind-up radio (now Freeplay energy)
  9. What is the plastic doughnut shaped water carrier?
    Q-drum
  10. Roundabout thing that pumps water?
    PlayPumps
  11. What was the downfall of the PlayPumps?
    • - lack of infrastructure/maintenance
    • - children stopped playing on it
  12. Irradiance vs. Insolation
    • - Irradiance: power quantity of solar resource or the amount of solar power measured at given moment in time, instantaneous power
    • - Insolation: energy quantity of solar resource, amount of solar power over a period of time
  13. Irradiance is measured by?
    Pyranometer
  14. What is the solar constant?
    Amount of solar radiation in space
  15. How are PV panels rated?
    Using 1000 watts/m2  due to amount of energy of one sun or peak sun (solar irradiance)
  16. Concentrating solar problem
    • - Find areas of lens and concentrated area (pir2)
    • - Divide area of lens by concentrated area
  17. Three factors of food dryers
    • - Temperature
    • - Air flow
    • - Humidity
  18. Factors that affect temperature
    • - area of south facing glazing
    • - amount of insulation
    • - air tightness of dryer box
    • - area of vent openings
    • - ambient temp
  19. What temperature can water be pasteurized?
    150 F
  20. Small polycarbonate cylinder that uses soy wax to determine pasteurization?
    WAPI
  21. Uses beeswax and PET bottles to determine pasteurization?
    Solbee
  22. China accounts for ____ of installed solar thermal?
    • - 2/3
    • - mainly evacuated tube
  23. What is medium temp. solar thermal used for?
    domestic water and space heating
  24. What are two freeze protector systems?
    • - pressurized glycol
    • - drainback
  25. What type of fluid is used in a drain back system?
    Water
  26. How is evacuated tube collectors different from flat plate collectors?
    Absorber plate is contained inside the glass evacuated tube
  27. What are the two designs for fluid to travel?
    • - u-tube 
    • - tube-in-tube (coaxial)
  28. What is the better choice in cloudy and colder locations? (solar thermal)
    evacuated tube
  29. Open loop system vs. closed
    • - Open: heat transfer medium is potable water supply
    • - Closed: uses heat exchanger
  30. What are the three types of utility solar thermal?
    • - Stirling engine parabolic dish
    • - Parabolic trough
    • - Solar power tower
  31. What heat transfer fluid can produced electricity at night?
    Molten salt
  32. What is the Suncatcher?
    • Stirling engine system, holds world record for most efficiency
    • - tracking parabolic mirror, uses hydrogen to move pistons
  33. What is a solar power tower?
    • - Uses heliostats to reflect sunlight
    • - uses water or salt for heat transfer fluid
  34. What is the PS 10?
    • - First commercial solar power tower plant in the world
    • - Uses water to produce steam
    • - Uses heliostats
    • - Abengoa Solar
  35. What are the four stp's?
    • - PS 10 (no storage)
    • - PS 20 (no storage)
    • - Crescent dunes (salt, storage)
    • - Ivanpah (no storage)
  36. What is a parabolic trough solar thermal?
    • - Parabolic shaped mirrors to concentrate sun on central pipe HTF
    • - capacity increases with thermal storage
  37. What are the three parabolic trough solar thermal plants?
    • - Nevada Solar one
    • - Solana project
    • - Mojave project

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