- Author
- Zarr, R. R. | Burch, D. M. | Faison, T. | Arnold, C. | O'Connell, M.
- Title
- Calibration of the NBS (National Bureau of Standards) Calibrated Hot Box.
- Coporate
- National Bureau of Standards (NEL), Gaithersburg, MD
- Journal
- Journal of Testing and Evaluation, Vol. 15, No. 3, 167-177, 1987
- Keywords
- residential buildings; heat transfer; reprints
- Identifiers
- hot boxes; calibration; energy balance; uncertainty; us nbs
- Abstract
- A series of calibration tests was conducted in the laboratory in order to determine the overall experimental error and uncertainty for the NBS calibrated hot box. For these tests, 4 in (0.1m) and 8 in (0.2m) thick polystyrene wall specimens having known thermal resistances were installed in a support frame and sandwiched between the climatic and metering chambers. The metering chamber was operated at a typical indoor condition for a residence, while the climate chamber was operated at selected steady outdoor winter conditions. For each of the tests, an energy balance was performed on the metering chamber. The residual for an energy balance of the metering chamber was compared to the predicted flanking loss determined using a finite-difference heat-transfer model. In addition, a special series of measurements was conducted to determine the accuracy of equipment used to measure the energy removed by the cooling coil of the metering chamber.