Completed Research -- February 2014
The final reports for the following research projects are available for free for ASHRAE members. Visit www.ashrae.org/research and log in to gain access. The ASHRAE Transactions papers are available for $5 for ASHRAE members at www.ashrae.org/bookstore.
1488-RP, Laboratory Testing of Flat Oval Tees and Laterals to Determine Loss Coefficients, measures pressure loss coefficients for several straight body flat oval tees and laterals common in use today. The project presents experimental main and branch fitting loss coefficient data on these diverging and converging fittings. Four fittings are presented for additions to the current ASHRAE Duct Fitting Database. In every instance the tests were performed in accordance with ASHRAE Standard 120-2008, Method of Testing to Determine Flow Resistance of HAVC Ducts and Fittings. Technical papers published in ASHRAE Transactions (Vol. 118 (1), CH-12-037) and ASHRAE HVAC&R Research Journal (Vol. 17(5), October 2011) are available.
1488-RP, Laboratory Testing of Flat Oval Tees and Laterals to Determine Loss Coefficients, was sponsored by TC 5.2, Duct Design.The principal investigator was Stephen Idem with Tennessee Technological University.
1596-RP, Ventilation and Indoor Air Quality in Retails Stores, set out to optimize ventilation to balance energy use and IAQ in U.S. retail buildings. The project monitored 14 retail buildings and reviewed the published literature to characterize the relationship between ventilation rates and/or pollutant concentrations in these retail stores. The study found about half of stores tested met or exceeded ASHRAE Standard 62.1-2010 ventilation rates which did not necessarily negate the presence of pollutants above their suggested concentration limits. Two papers on this project have been submitted for future publication in ASHRAE HVAC&R Research Journal.
1596-RP, Ventilation and Indoor Air Quality in Retails Stores, was sponsored by TC 4.3, Ventilation Requirements and Infiltration.The principal investigator was Jeffrey Siegel with the University of Texas.
Coatings have long been used in cool roof applications but are also more recently being used to provide thermal insulation for pipes, ducts, and tanks. These have been on the market for a number of years but the technical data required to properly specify the materials is not available, even in the ASHRAE Handbook. 1550-RP, Thermal Performance of Selected Insulating Coatings for Piping and Ductwork, tested the thermal properties (conductivity, diffusivity, specific heat, and heat flux) of three coatings used in industrial applications as thermal insulation. Two of the coatings tested were white in color with ceramic particles while the third product was translucent with nano-particle content. Thermal performance was measured at various conditions and are presented in the final report. A technical paper has been submitted for future publication in ASHRAE Transactions.
1550-RP, Thermal Performance of Selected Insulating Coatings for Piping and Ductwork, was sponsored by TC 1.8, Mechanical Systems Insulation.The principal investigator was David Yarbrough with R&D Services.
1517-RP, Validation of a Low-Order Acoustic Model of Boilers and its Application for Diagnosing Combustion Driven Oscillations, presents a model and procedure to significantly reduce design and development time for high efficiency, lower emission boilers. Troubleshooting combustion-drive oscillation and the associated tonal noises common with this equipment can often delay development by several months. The final report suggests text for inclusion in the ASHRAE Handbook for a design process to prevent, diagnose and solve combustion oscillation problems. Three technical papers published in ASHRAE Transactions (Vol. 119 (2), DE-13-034 & DE-13-037, Vol. 120 (1), NY-14-023) are available. 1517-RP, Validation of a Low-Order Acoustic Model of Boilers and its Application for Diagnosing Combustion Driven Oscillations, was sponsored by TC 6.10, Fuels and Combustion.The principal investigator was David Herrin with Secat Inc.