Instrumentation for the in-situ measurement of building envelopes
This paper discusses the types of instrumentation that can be used for the in-situ measurement of the thermal resistance of building components. Four types of instrumentation are described: noncontact spot radiometers, contact heat flow transducers, portable calorimeters, and a type of portable guarded hot plate device developed by Lawrence Berkeley Laboratories, called an envelope thermal testing unit. A brief description of each device is given along with a description of how the device is used to measure in-situ thermal properties of building components. A theoretical justification of the use of long-term averaging of the heat flow and temperature data for estimating the thermal resistance is also presented. The accuracy of each in-situ measurement method is accessed.
- Research Organization:
- Building Physics Div., Center for Building Tech., National Bureau of Standards, MD
- OSTI ID:
- 5590321
- Report Number(s):
- CONF-850606-
- Journal Information:
- ASHRAE Trans.; (United States), Vol. 91:2B; Conference: American Society of Heating, Refrigerating and Air-Conditioning Engineers' semiannual meeting, Honolulu, HI, USA, 23 Jun 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
47 OTHER INSTRUMENTATION
BUILDINGS
THERMAL CONDUCTIVITY
CALORIMETERS
ACCURACY
USES
RADIOMETERS
MEASURING METHODS
TRANSDUCERS
CALCULATION METHODS
COMPARATIVE EVALUATIONS
HEAT FLOW
LAWRENCE BERKELEY LABORATORY
PLATES
TEMPERATURE MEASUREMENT
MEASURING INSTRUMENTS
NATIONAL ORGANIZATIONS
PHYSICAL PROPERTIES
RADIATION DETECTORS
THERMODYNAMIC PROPERTIES
US AEC
US DOE
US ERDA
US ORGANIZATIONS
320100* - Energy Conservation
Consumption
& Utilization- Buildings
440300 - Miscellaneous Instruments- (-1989)