Radiant Heat Exchange Plates Different Sizes Equation and Calculator

Heat Transfer Engineering
Engineering Physics

Radiant heat exchange for two isothermal (constant temperature) parallel flat black plates of different sizes equation and calculator.

Heat Loss From an Insulated Electric Wire Equation and Calculator

ALL calculators require a Premium Membership

Preview: Radiant heat exchange for two parallel flat black plates different size calculator

The heat flow (q) from the plate is calculated as:

q = 56.69 x 10-9 x VF(1-2) x L12 x (T14 - T24 )

Where 56.69 x 10-9 is the average Stefan-Bolzmann constant, L1is the area of the plate, T1 is the plate 1 temperature and T2 is the plate 2 temperature. The view factor VF(1-2) (also known as radiation shape factor, angle factor, and configuration factor) is defined as:

Length of plate 1 divided by the distance between the plates (L 1 / D) must be greater than 0.2 for this calculation.

radiation shape factor


x = (C) x ( 1 +E )
y = (C) x ( 1 - E )
C = L1 / D
D = L2 / L1
W = Plate Width (W)
D = Spacing (m)
T1 = Plate 1 Temperature (K)
T2 = Plate 2 Temperature (K)
VF1-2 = View Factor
q = Radiated Heat Flow (W)


Rosenow, W. M., J. P. Hartnett, Y. I. Young, Handbook of Heat Transfer , 3rd Ed., McGraw-Hill Handbooks, New York, 1998. p. 7.3 - 7.19, 7.81.

Contribute Article
Spider Optimizer

© Copyright 2000 - 2017, by Engineers Edge, LLC www.engineersedge.com
All rights reserved
Disclaimer | Feedback | Advertising | Contact

User Reviews/Comments:

There are currently no comments available.

Add a Comment (you must be logged in to post comment Register):
Email: (Optional)