Buildings research using infrared imaging radiometers with laboratory thermal chambers

Brent T. Griffith; Dariush Arasteh

doi:10.1117/12.342320

19 March 1999 Buildings research using infrared imaging radiometers with laboratory thermal chambers

Brent T. Griffith, Dariush Arasteh

Proceedings Volume 3700, Thermosense XXI; (1999) https://doi.org/10.1117/12.342320
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

Infrared thermal imagers are used at Lawrence Berkeley National Laboratory to study heat transfer through components of building thermal envelopes. Two thermal chambers maintain steady-state heat flow through test specimens under environmental conditions for winter heating design. Infrared thermography is used to map surface temperatures on the specimens' warm side. Features of the quantitative thermography process include use of external reference emitters, complex background corrections, and spatial location markers. Typical uncertainties in the data are plus or minus 0.5 degrees Celsius and 3 mm. Temperature controlled and directly measured external reference emitters are used to correct data from each thermal image. Complex background corrections use arrays of values for background thermal radiation in calculating temperatures of self-viewing surfaces. Temperature results are used to validate computer programs that predict heat flow including Finite-Element Analysis (FEA) conduction simulations and conjugate Computational Fluid Dynamics (CFD) simulations. Results are also used to study natural convection surface heat transfer. Example data show the distribution of temperatures down the center lines of an insulated window.

Citation Download Citation

Brent T. Griffith and Dariush Arasteh "Buildings research using infrared imaging radiometers with laboratory thermal chambers", Proc. SPIE 3700, Thermosense XXI, (19 March 1999); https://doi.org/10.1117/12.342320

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available