Abstract
A method has been developed for measuring heat losses from insulated systems in the field. While the measurements are not as precise as those made under laboratory conditions, they are more indicative of actual in service conditions.
Extensive field tests have been carried out in petrochemical plants and power plants throughout the country. Some insulating materials have been found to lose up to 60% of their insulating value after a few years in service. Calcium silicate insulations were found to be the most durable.
Harr, K. S.; Hutto, F. B., Jr. (1979). In-Situ Thermal Conductivity Testing Using a Portable Heat Flow Meter. Energy Systems Laboratory (http://esl.tamu.edu). Available electronically from
https : / /hdl .handle .net /1969 .1 /93844.