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Energy Efficient Laboratory Fume Hood

Lawrence Berkeley National Laboratory

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Technology Marketing SummaryFume hoods, used to protect the user from breathing harmful chemical vapors, consume large amounts of energy, estimated to be 1GW in California alone. This power load comes from the fan power need to move air out the hood, and to condition make-up air.DescriptionHelmut Feustel at Berkeley Lab has developed a promising new low-flow method that reduces this energy load in fume hoods, while still protecting workers' health. This new constant air volume system can reduce a laboratory's energy consumption and peak-power requirements for fan and make-up air conditioning energy. Because of this reduced make-up air requirement, air-conditioning equipment can also be downsized, which reduces initial equipment costs and space requirements for the air handler and the ductwork. The new Berkeley Lab fume hood also does not require the expensive control systems used to regulate air flow in VAV fume hoods.Benefits
  • Up to 75% energy savings over current fume hood systems
  • Allows use of small HVAC systems
  • Avoids expensive control systems required by VAV fume hoods
Applications and Industries
  • Laboratory Fume Hoods
More Informationhttp://ateam.lbl.gov/hightech/fumehood/fhood.html

http://ateam.lbl.gov/hightech/fumehood/Newsletter.html
Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Patent 6,428,408
Patent
6,428,408
Low flow fume hood
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.
Lawrence Berkeley National Laboratory 08/06/2002
Issued
Patent 6,089,970
Patent
6,089,970
Energy efficient laboratory fume hood
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.
Lawrence Berkeley National Laboratory 07/18/2000
Issued
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
IB-1205, 1473, 1593LicensedAvailable - Available for licensing in certain fields of use, including biological safety cabinets and clean benches, semiconductor manufacturing equipment and electronics assembly for use in clean rooms.06/15/201006/24/2010

Contact LBL About This Technology

To: Shanshan Li<ipo@lbl.gov>