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Matthew Guyon Week 9: March 22 nd , 2007

Matthew Guyon Week 9: March 22 nd , 2007. Thermal Control Group/Group Leader Mars Nuclear Reactor TCS/ Space Nuclear Reactor TCS. Mars Nuclear Reactor TCS. TCS for MNR created by Matthew Guyon, last modified on 3-08-07. Radiator Area: 168.24 m 2 Total Mass: 5.39 mt.

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Matthew Guyon Week 9: March 22 nd , 2007

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  1. Matthew GuyonWeek 9: March 22nd, 2007 Thermal Control Group/Group Leader Mars Nuclear Reactor TCS/ Space Nuclear Reactor TCS

  2. Mars Nuclear Reactor TCS TCS for MNR created by Matthew Guyon, last modified on 3-08-07 Radiator Area: 168.24 m2 Total Mass: 5.39 mt Power Number of 750 kW with a 24% efficiency provided by Mike Kowalkowskion on week 8 – 3/08/07 Guyon, 2 Numbers based on equation on slide 8 and attached code on pages 10-19

  3. Space Nuclear Reactor TCS TCS for MNR created by Matthew Guyon, last modified on 3-08-07 Power Number of 500 kW to 5 MW with a 24% efficiency Data for the space reactor in 100 kW increments is provided on page 9 TCS for MNR created by Matthew Guyon, last modified on 3-08-07 Power Number of 500 kW to 5 MW with a 24% efficiency Guyon, 3 Numbers based on equation on slide 8 and attached code on pages 10-19

  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. Nuclear Reactor TCS 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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