Download or read book The Potential for Air Flow Reduction in Fume Hoods at Hanford written by and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Download or read book Energy and Cost Savings for Variable Air Volume VAV Laboratory Fume Hoods in Two University Research Buildings written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The volume of lab exhaust for Engineering Building 1 (EB-1) and Partners III, which are research labs located on North Carolina State University's Centennial Campus, is measured and analyzed. There are three main objectives. The first is to determine how the actual system exhaust compares to the total design capacity of the lab HVAC system. Next, the potential additional savings that would result from carefully keeping fume hoods closed when no one is working in the hood. Then, estimate the actual savings that result from using variable air volume (VAV) fume hoods in place of constant volume (CV) hoods. Lab buildings require much more energy for the HVAC system than other academic buildings because of their high minimum airflow set points, once-through air for supply, and high static pressures for the ventilation system. VAV fume hoods can reduce the HVAC energy requirements by reducing the hood exhaust flow to about one-fourth of the full flow when the fume hoods are closed. However, it is total lab exhaust that drives energy use, and the actual reduction in total exhaust cannot be assumed to be equal to a reduction in fume hood exhaust. This is true in EB-1 because minimum airflow set points are 10-12 air changes per hour (ACH), and a general exhaust box maintains this minimum. Thus, when all 70 fume hoods in EB-1 were closed on Friday evening before the Labor Day holiday in 2005 there was a drop of 14,166 CFM in fume hood exhaust. However, total exhaust dropped by only 8,156 CFM, which is 58% as much. Therefore, energy savings made possible by closing the fume hoods would be grossly overestimated if the drop in total lab exhaust had been assumed to be equal to the drop in fume hood exhaust. The total exhaust rate was determined to be almost constant at about 68% of the maximum design airflow for EB-1 during the trended period. The total exhaust was relatively constant over the trended period of about one month because most of the labs were controlled by the minim.
Download or read book Low Flow Fume Hood written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A fume hood is provided having an adequate level of safety while reducing the amount of air exhausted from the hood. A displacement flow fume hood works on the principal of a displacement flow which displaces the volume currently present in the hood using a push-pull system. The displacement flow includes a plurality of air supplies which provide fresh air, preferably having laminar flow, to the fume hood. The displacement flow fume hood also includes an air exhaust which pulls air from the work chamber in a minimally turbulent manner. As the displacement flow produces a substantially consistent and minimally turbulent flow in the hood, inconsistent flow patterns associated with contaminant escape from the hood are minimized. The displacement flow fume hood largely reduces the need to exhaust large amounts of air from the hood. It has been shown that exhaust air flow reductions of up to 70% are possible without a decrease in the hood's containment performance. The fume hood also includes a number of structural adaptations which facilitate consistent and minimally turbulent flow within a fume hood.
Download or read book Energy Efficient Laboratory Fume Hood written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The present invention provides a low energy consumption fume hood that provides an adequate level of safety while reducing the amount of air exhausted from the hood. A low-flow fume hood in accordance with the present invention works on the principal of providing an air supply, preferably with low turbulence intensity, in the face of the hood. The air flow supplied displaces the volume currently present in the hood's face without significant mixing between the two volumes and with minimum injection of air from either side of the flow. This air flow provides a protective layer of clean air between the contaminated low-flow fume hood work chamber and the laboratory room. Because this protective layer of air will be free of contaminants, even temporary mixing between the air in the face of the fume hood and room air, which may result from short term pressure fluctuations or turbulence in the laboratory, will keep contaminants contained within the hood. Protection of the face of the hood by an air flow with low turbulence intensity in accordance with a preferred embodiment of the present invention largely reduces the need to exhaust large amounts of air from the hood. It has been shown that exhaust air flow reductions of up to 75% are possible without a decrease in the hood's containment performance.
Download or read book Air Flow Characteristics in Laboratory Fume Hoods Under Minimum Airflow Conditions written by John Ellis Dawkins and published by . This book was released on 1965 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plutonium Finishing Plant pfp Stabilization Hanford Site Richland Benton County written by and published by . This book was released on 1996 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Design of a Dust controlled Vented Hood Utilizing Laminar Air Flow written by W. J. Whitfield and published by . This book was released on 1963 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes a laminar air flow vented clean hood and presents performance data for it. This open-front hood provides a clean work area for operations that require removal of particles or noxious gases. This hood provides dust levels of less than 1000 particles per cubic foot 0.32 micron and larger.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1973 with total page 1412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1989 with total page 1174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Simulation of Laboratory Fume Hood Airflow Performance written by Robert Reither and published by . This book was released on 1998 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Air Flow Measurements in a Laboratory Fume Hood Fisher Scientific Co Type 17 105 written by William F. Goddard and published by . This book was released on 1959 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy and Cost Savings for Variable Air Volume VAV Laboratory Fume Hoods in Two University Research Buildings written by Scott Michael Parker and published by . This book was released on 2006 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: HVAC, Exhaust, Trend, Airflow.
Download or read book Air Flow and Particle Transport Into Local Exhaust Hoods written by Sven Alenius and published by . This book was released on 1989 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reduced Worker Exposure and Improved Energy Efficiency in Industrial Fume hoods Using an Airvest written by and published by . This book was released on 1992 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reduction in the breathing zone concentration of an experimentally simulated pollutant, by factors ranging from 100 to 800, was observed with the device (called an airvest). With use of the airvest by the worker, the hood face velocity can be reduced, leading to substantial energy savings in conditioning of make up air in the building. The airvest works by elimination or ventilation of the eddy that develops in front of a worker when the worker stands in the open face of a fume hood. Normally this eddy draws some of the pollutant (commonly generated near and in front of the worker) towards the worker's breathing zone. Experiments sing a heated full-size mannequin were conducted with a full scale walk-in fume hood. Sulfur hexafluoride was used to simulate pollutant generation and exposure during a work situation. Flow visualization with smoke was also undertaken to evaluate the airvest qualitatively. 3 refs.
