Exhaust Dispersion technical papers
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Saving Energy in Lab Exhaust Systems
Carter, J.J., B. C. Cochran, and J. D. Reifschneider. American Society of Heating, Refrigerating and Air Conditioning Engineers, Inc., ASHRAE Journal, June, 2011
Abstract: In this feature article, the often-neglected topic of external exhaust as a source of indoor pollution is addressed in the context of laboratories and their exhaust/intake designs.
Exhaust Contamination of Hidden vs. Visible Air Intakes
Petersen, R.L., J.J. Carter, and J.W. LeCompte.
Abstract: A wind tunnel dispersion modeling study was conducted to investigate exhaust contamination of hidden versus visible air intakes. Overall, the study has shown what designers suspected: placing air intakes on building sidewalls is beneficial when stacks are on the roof. Significant concentration reductions were found when air intakes are placed right below the building roof edge on the building sidewall. The farther down the building sidewall the air intake is placed, the larger the reduction. However, the largest relative reduction between a visible and hidden intake is achieved by just moving the intake a few feet from the edge of the building roof to a point just around the corner on the building sidewall.
Petersen, R.L., J.J. Carter, and B.C. Cochran. Laboratories for the 21st Century, May 2005
Abstract: This guide provides general information on specifying acceptable exhaust and intake designs. It offers various quantitative approaches (dispersion modeling) that can be used to determine expected concentration (or dilution) levels.
Specifying Exhaust and Intake Systems
R.L. Petersen, B.C. Cochran, and J.J. Carter, American Society of Heating, Refrigerating and Air Conditioning Engineers, Inc., ASHRAE Journal, August, 2002
Abstract: This article discusses the factors that affect building exhaust behavior and steps that can be taken in the design phase to mitigate problems that can be caused by exhaust re-entering the building that produced it, entering air intakes or operable widows of surrounding buildings, or affecting surrounding pedestrian-level areas.
Specifying Exhaust Systems That Avoid Fume Entry and Adverse Health Effects
Petersen, R.L, B.C. Cochran, and J.W. LeCompte, American Society of Heating, Refrigerating and Air Conditioning Engineers, Inc., ASHRAE Transactions, V.108, Pt2., 2002
Abstract: This paper provides general information regarding the need for good exhaust system design and discusses issues that should be considered when designing exhaust stacks and intakes, such as applicable standards, analytical methods, plume rise, architectural screens, and entrained air exhaust stacks. Whether conventional or entrained air exhaust systems are used, the paper discusses why exhaust specifications (i.e., stack height, volume flow, location, and exhaust velocity) should be based on ensuring acceptable concentrations at air intakes and other appropriate locations.
Influence of Architectural Screens on Rooftop Concentrations Due to Effluent from Short Stacks
R.L. Petersen, J.J. Carter, and M.A. Ratcliff, American Society of Heating, Refrigerating and Air Conditioning Engineers, Inc., ASHRAE Transactions, V.105, Pt.1, 1999
Abstract: This paper describes the wind tunnel study conducted on behalf of the American Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE) to evaluate and quantify the effect of architectural screens on rooftop concentration levels due to effluent from short stacks. An equivalent stack height (ESH) concept is introduced, which is used to develop a stack height reduction (SHR) factor that my be used in conjunction with existing stack height design procedures.
R.L. Petersen, Journal of the Air Pollution Control Association, Vol. 36, No. 12, pp. 1347-1352, January 1987
Abstract: This paper is directed to those persons interested in predicting concentrations downwind of platform-type structures associated with oil or gas facilities that operate on the Outer Continental Shelf. The purpose of this study was to determine the effect of platform-type structures on the dispersion of pollutant plumes and to assess the adequacy of the building wake algorithm included in the Offshore and Coastal Dispersion (OCD) Model.
