Calorimetric method for heat transfer coefficient measurement of thermal envelopes Conference Paper uri icon

abstract

  • A theoretical methodology is developed for UA measurement of thermal envelopes or enclosures by using a Short Term Average of the Measurement (STAM) parameters. This averaging period covers at least a one-day period, and criteria developed for selecting the averaging period ensure that the impact of driving forces before the averaging period on the enclosure temperature during the averaging period is the same as the impact of driving forces during the period on the enclosure temperature after the averaging period. The measurement can be carried out using either constant heat input or by maintaining a constant enclosure temperature. Application of the STAM in an outdoor test cell showed that the STAM can account for thermal storage due to variation of weather pattern, and reject the data when it is unsuitable for measuring the UA value.

author list (cited authors)

  • Liu, M., & Claridge, D. E.

publication date

  • January 1993