Title

Comparison of a duct system computer model with measured data in a residential attic with a duct system

Abstract

The purpose of this study was to compare a large set of high-quality laboratory measurements with computational predictions made by the FSEC 3.0 simulation model for air distribution systems located in building spaces, specifically attics in this study. Duct system tests were performed with controlled attic ventilation in a residential attic test module (RATM) located in a large-scale climate simulator (LSCS). The duct system in the RATM was attached to an independently controllable supply of conditioned air. Both summer and winter conditions were used in the LSCS, with the corresponding supply to the duct system either cool or warm air. Holes simulating air leakage sites at typical duct joints at the beginning, middle, and end of the duct system were opened and closed selectively to study the effect of air leakage into the attic space. Tests were conducted using both uninsulated and insulated ducts. Airflows and pressures in the duct system and temperatures in and around the RATM were monitored in all the tests. The comparison shows that the model predicts duct air temperatures, pressures, and leakage airflows well. The model can be used with good confidence to simulate the thermal performance of air distribution systems.

Publication Date

12-1-1998

Publication Title

ASHRAE Transactions

Volume

104

Issue

2

Number of Pages

1063-1073

Document Type

Article

Identifier

scopus

Socpus ID

0032308857 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0032308857

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