The Space Station Power System
Download
1 / 26

The Space Station Power System Solar Array Battery Power Management & Distribution - PowerPoint PPT Presentation


  • 168 Views
  • Uploaded on

The Space Station Power System Solar Array Battery Power Management & Distribution. Dave McKissock NASA Glenn Research Center May 24, 2006 [email protected] Compare ISS & Your Home Scratch off items not applicable to both locations. Bath tub Exercise Machine

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' The Space Station Power System Solar Array Battery Power Management & Distribution' - corazon-soria


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

The Space Station Power SystemSolar ArrayBatteryPower Management & Distribution

Dave McKissock

NASA Glenn Research Center

May 24, 2006

[email protected]


Compare ISS & Your HomeScratch off items not applicable to both locations

  • Bath tub

  • Exercise Machine

  • Kitchen Table & Chairs

  • Weekly cleaning

  • Cable TV

  • Thermal Control

  • Hot Water Heater

  • Smoke Alarm

  • Electrical Power

  • Trash removal

  • Clean Gutters

  • Replenish O2

  • Waste water removal

  • Swim Suit

  • Lawn Maintenance

  • Food Preparation


ISS Batteries

38 cells wired in series make one Battery Orbital Replacement Unit (Battery ORU)


ISS Batteries

Battery Charge Discharge Unit (BCDU)

One Battery = 2 Battery ORUs

Battery ORU

Battery ORU



What’s Next in Space Power?

  • Crew Exploration Vehicle

  • Lunar Lander

  • Lunar Rover

  • Lunar Base (?)

  • Mars Base (?)


Poll question 1
Poll Question #1

Do you support the new plan for space exploration that returns the space shuttle to flight, completes assembly of the space station, builds a replacement for the shuttle, returns to the Moon and then on to Mars and beyond?


July 2004 Gallup Survey Results

  • With funding for NASA’s program expected not to exceed 1% of the federal budget, 42% of adults surveyed say they support the proposed Exploration program



Electricity is described in two ways:

  • Voltage (Volts, V)

  • Current (Amperes, A)

V

A

{ Power = Voltage * Current }


A

  • Connect solar cells together…

    • Series (end to end): to build up voltage

    • Parallel (side by side): to build up current

    • This makes a solar array


A

-

-

-

-

-

-

-

-

-

+

+

+

+

+

+

+

+

+

end to end

Series

or

side by side

Parallel?

end to end

Series

or

side by side

Parallel?

V

(currents add)

(voltages add)



Poll question 2
Poll Question #2

  • Need 12V at ½ Amp

  • Each cell generates ½ V at ¼ Amp

  • What do I need?


Discussion of Poll AnswerD: Both A & C

  • 24 cells (end-to-end)

    • Add ½ volt plus ½ volt 24 times = 12V (or ½ x 24 = 12)

  • 2 cells (side by side)

    • Add ¼ amp plus ¼ amp = ½ amp

  • Individual cell performance varies as environment changes




O

H

Remember H20 ?


A reacts and gives/takes charges

-

+

-

-

-

-

-

-

-

-

-

-

-

+

+

+

+

+

+

+

+

+

+

+

Parallel

Currents add

Series  Voltages add

V

Energy Storage


Batteries on Space Station reacts and gives/takes charges

  • Desire 114 Volts

  • Willing to take whatever current you get

  • Each Nickel-Hydrogen cell (NiH2) produces 1.5V, rated at 81 Amp-Hours

  • What series / parallel arrangement do you recommend?


Poll question 3
Poll Question #3 reacts and gives/takes charges

  • Need 114V at whatever Amps

  • Each cell generates 1½ V at 81 Amp-Hr

  • What will I need?


Discussion of Poll Results reacts and gives/takes charges

  • Correct Answer is “A”, 76 cells in series at 1.5 volts per cell yields 76 x 1.5 = 114 V

  • No spare cells for voltage redundancy

    • Batteries designed to last 6.5 years and provide needed voltage

  • Nuclear power not an option in low earth orbit


NSTA SciGuides: reacts and gives/takes charges

Provide tools to quickly and easily locate targeted science content information and teaching resources from NSTA-reviewed science web sites.

http://sciguides.nsta.org


ad