- Author
- Burch, D. M. | Zarr, R. R.
- Title
- Evaluation of the Heat Flux Transducer Technique for Measuring the Thermal Performance of Walls.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Book or Conf
- In-Situ Heat Flux Measurements in Buildings Applications and Interpretations of Results. February 1991, 111-122 p., 1991
- Keywords
- tranducers | evaluation | heat flux | walls | test methods
- Abstract
- Four wall specimens were instrumented with heat flux transducers and tested in a calibrated hot box to determine the accuracy of the heat flux transducers. The heat flux transducers were installed at the interior surface of the wall specimens and exposed to different steady and dynamic (i.e., time-dependent) temperature differences of homogeneous and monolithic material layers, which yielded virtually one-dimensional heat flux. The other two wall specimens were composed of conventional wall construction with wood structural members, which yielded a two-dimensional heat flux pattern. The heat flux transducers were previously calibrated by exposing them to a uniform heat flux in a guarded hot plate. The steady-state and transient heat flux transducer measurements agreed within 5% of the calibrated hot box measurements. These results indicate that, when heat flux transducers are carefully calibrated and installed, they provide accurate measurements of heat flux in walls.