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Matthew Guyon Week 7: March 1 st , 2007

Matthew Guyon Week 7: March 1 st , 2007. Thermal Control Group/Team Leader Manned Rover TCS/ Mars Crawler TCS/ Sample Return TCS. MR Thermal Control System. Power Number Provided by Jon Kubiak on 2-15-07. TCS for MR created by Matthew Guyon, last modified on 2-28-07. Guyon, 2.

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Matthew Guyon Week 7: March 1 st , 2007

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  1. Matthew GuyonWeek 7: March 1st, 2007 Thermal Control Group/Team Leader Manned Rover TCS/ Mars Crawler TCS/ Sample Return TCS

  2. MR Thermal Control System Power Number Provided by Jon Kubiak on 2-15-07 TCS for MR created by Matthew Guyon, last modified on 2-28-07 Guyon, 2 Numbers based on equation on slide 8 and attached code on pages 9-15

  3. MR Thermal Control System TCS for SR created by Matthew Guyon, last modified on 2-28-07 TCS for MC created by Matthew Guyon, last modified on 2-28-07 Power Number Provided by Courtney Rogge on 2-23-07 Power Number Provided by Courtney Rogge on 2-23-07 of 300 kW and modified by Steve Kassab with 90% efficiency to bring it to 30 kW total heat rejected Guyon, 3 Numbers for both sets based on equation on slide 8 and attached code on pages 9-15

  4. References • Ref 1: Larson, Wiley and Pranke, Linda. Human Spaceflight Mission Analysis and Design. St. Louis: McGraw-Hill Companies (Pgs 513-537) • Ref 2: Incropera, Frank P., DeWitt, David P. Fundamentals of Heat and Mass Transfer Fourth Edition. New York: John Wiley and Sons 1996 • Ref 3: Gilmore, David G.. Spacecraft Thermal Control Handbook. California: The Aerospace Corporation • Ref 4: “Heat Transfer.” 25 Feb 2007 Wikibooks. 25 Feb 2007. <http://en.wikibooks.org/wiki/Heat_Transfer#Convection> • Ref 5: “Heat Transfer Coefficients .” 25 Feb. 2007 The Engineering Toolbox. 25 Feb 2007 <http://www.engineeringtoolbox.com/heat-transfer-coefficients-exchangers-d_450.html> • Ref 6: “Material Emissivity Properties.” Electro-optical.com. 25 Feb 2007. <http://www.electro-optical.com/bb_rad/emissivity/matlemisivty.htm> • Ref 7: “Convection.” Knowledgerush.com. 25 Feb 2007. <http://www.knowledgerush.com/kr/encyclopedia/Convection> Guyon, 4

  5. MR Thermal Control System Larson1 Guyon, 5

  6. Convection • Q = hA(T2-T1) • h = 50.00; (w/m^2-k) for al • Value for h for aluminum is based on Heat Transfer Coefficients5 • Picture based on drawling from Convection7 Guyon, 6

  7. Radiation • Q = CAES(T2-T1)^4 • E = 0.84; for Anodized Aluminum-black • S = 5.67e-08; Stephan-Boltzmann constant • Constant for emissivity for aluminum is based on Material Emissivity Properties6 Guyon, 7

  8. Solving for Area • A = Q/(K*h*(t_ref - t_in) + C*E*S*(t_ref - t_in)^4); • This solves for the area needed to get rid of the heat based on the convection and radiation equations • The thought for these radiators is similar to that of a car radiator Guyon, 8

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