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Passive vent damper. Final report

Author
Savery, C. W.
Published
United States : [publisher not identified], 1981
Springfield, Va.: National Technical Information Service, [approximately 1981]
Physical Description
microfiche : negative ; 11 x 15 cm

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Summary
Seven concepts upon which a passive vent damper device could be based were generated during the early phase of the project. The concepts are: von Karman vortex street phenomena, turbulence amplifier in parallel with flow over a body, flow stability with heat transfer effects, temperature dependent flow oscillation effects, temperature controlled jet deflection, vortex valve, and separation phenomena to reduce drag. After the fluid mechanical approach to developing a passive vent damper was exhausted, the outside combustion vent was identified as a passive concept related to vent dampers which is amenable to development. Calculations and literature search indicated that up to 10% fuel savings were possible with an outside combustion vent. A breadboard design of a residential system was generated; one was constructed; and a field test with the investigator's forced air furnace was conducted. Based upon tests, the outside combustion vent produced energy savings of 0.4 x 10/sup 6/ Btu/month. This was estimated to result in about 30.00 seasonal fuel savings. The design, during a total of about 20 hours of operation in the field, operated safely and reliably with no problems. The outside combustion vent was proved feasible, and to have adequate performance, reliability, safety and economics. The few steps remaining to complete the commercialization of the device as a conversion for installed and new furnace applications are identified and outlined.
Report Numbers
DE85009168; DOE/R3/06097-T1
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: FG43-79R306097
OSTI Identifier 5915582
Research organization: Savery (C. William), Portland, OR (USA).
View MARC record | catkey: 47352097