OR-20-019 — Loss Coefficients for Internal Reinforcements Installed in a Phenolic Duct System (RP-1764)
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- ASHRAE
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An experimental program was conducted to measure thepressure loss attributed to internal reinforcements installed ina 22 × 22 in. (559 × 559 mm) phenolic duct system connected with four-bolt flanges and cleats, and having 10 ft (3.0 m) section lengths. It was determined that the zero-length loss coefficient for an individual internal cross reinforcement wasC= 0.080 for the specific geometry of the reinforcement and duct cross section considered, assuming that each reinforcement assembly contributed equally to the overall pressure loss in the test section. The reinforcement loss coefficient determined in this study was comparable to a value predicted using the ASHRAE Duct Fitting Database. When evaluated at thesame volume flow rate as unreinforced ducts, the presence of internal cross reinforcements more than doubled the measured pressure loss per unit length.
Citation: 2020 Winter Conference, Orlando, FL Technical Papers
Product Details
- Published:
- 2020
- Number of Pages:
- 7
- Units of Measure:
- Dual
- File Size:
- 1 file , 1.2 MB
- Product Code(s):
- D-OR-20-019
