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Steven Bodzin: Home energy :
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George Tsongas : Home energy :
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Fred S. Bauman, P.E. : HPAC :
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distribution (UFAD) systems. Proceedings of Indoor Air 2002, Monterey, CA. 8) CBE. (2000). Underfloor air technology Website, www.cbe.berkeley.edu/underfloorair. Center for the Built Environment, University of California, Berkeley. 9) CBE. (2003). CBE Website, http:// www.cbe.berkeley.edu/. Center for the Built Environment, University of California, Berkeley. 10) Bauman, F. (2003). Underfloor air distribution (UFAD) design guide. Atlanta: American Society of Heating, Refrigerating, and Air-Conditioning Engineers. 11) Skistad, H. (1994). Displacement ventilation. Taunton, Somerset, England: Research Studies Press. 12) REHVA. (2001). Displacement ventilation in nonindustrial premises (H. Skistad, ed.). Federation of European Heating and Air-Conditioning Associations (REHVA). 13) Loudermilk, K. (1999). Underfloor air distribution solutions for open office applications. ASHRAE Transactions, Vol. 105, Pt. 1. 14) Faulkner, D., Fisk, W.J., Sullivan, D.P, & Lee, S.M. (2002, June). Ventilation efficiencies of a desk-edge-mounted task ventilation system. Proceedings of Indoor Air 2002, Monterey, CA 15) Melikov, A.K., Cermak, R., & Majer, M. (2002). Personalized ventilation: evaluation of different air terminal devices. Energy and Buildings, 34, pp. 829-836. 16) Bauman, F., Pecora, P., & Webster, T. (1999). How low can you go? Air flow performance of low-height underfloor plenums. Berkeley Calif: Center for the Built Environment, University of California. 17) Matsunawa, K., Iizuka, H., & Tanabe, S. (1995). Development and application of an underfloor air conditioning system with improved outlets for a smart building in Tokyo. ASHRAE Transactions, Vol. 101, Pt. 2.
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)UFAD( . HVAC UFAD . . References 1) AEC (2000). Design brief: underfloor air distribution and access floors. Boulder, CO: Architectural Energy Corporation. 2) Bauman,F., & Webster, T. (2001, June) Outlook for underfloor air distribution. ASHRAE Journal, 6, 18-25. 3) Daly, A. (2002, May). Underfloor air distribution: lessons learned. ASHRAE Journal, 5, 21-24. 4) Loftness, V., Brahme, R., Mondazzi, M., Vineyard, E., & MacDonald, M. (2002). Energy savings potential of flexible and adaptive HVAC distribution systems for office buildings -- final report. Air Conditioning and Refrigeration Technology Institute 21-CR Research Project 605-30030. 5) Stanke, D., & Bradley, B. (2001). Turning air distribution upside down: Underfloor air distribution. TRANE Engineers Newsletter, Vol. 30, No. 4. 6) Webster, T., Bauman, F., & Reese, J. (2002, May). Underfloor air distribution: thermal stratification. ASHRAE Journal, 5, pp. 28-36. 7) Webster, T., Bauman, F., Reese, J., & Shi, M. (2002, June). Thermal stratification performance of underfloor air
Chimney And Gas Vent Systems ) (
manufacturers appliances meet efficiency standards. 8. As the number of appliances served by a common vertical vent or chimney increases, the precision of design decreases because of these factors and the need to allow for maximum and minimum input operations. 11. The chimney can serve as a passageway to carry flue gas to this type of control equipment. 12. These vent devices can be electrically, mechanically, or thermally actuated and can reduce energy consumption and improve the seasonal efficiency of gas and oil burning appliances. 13. When this type of chimney is used to serve an oilfired appliance, it should have a tile liner and should comply with applicable building codes such as NFPA Standard 211. 16. This type of gas vent is listed for vented wall furnaces certified as complying with the pertinent ANSI Standard.
Answer
ACROSS 3. This term includes specialized vent products such as gas vents. 4. All rooms or spaces containing fuel-burning equipment must have a constant supply of this type of air at adequate static pressure to ensure proper fuel to air mixing in the burner. 6. The equations and design charts typically used to determine vent or chimney sizes are based on this type of operating condition. 8. This is negative static pressure measured relative to atmospheric pressure (when this is positive, the static pressure is negative). 9. These vent pipe components connect gas appliances to the gas vent, chimney, or single-wall metal pipe. 10. This term refers to any furnace, boiler, or incinerator. 14. These prevent the vertical discharge of high-velocity cases in commercial chimney installations; however, these are preferred for residential gas-burning equipment flues/ vents because it is easier to exclude rain than to risk rainwater leakage at horizontal joins or to drain it. 15. This draft is the draft needed at the appliance outlet. 17. Along with winds, these currents around a building
affect the discharge of gases from vents and chimneys. 18. This gas is the mixture of gases discharge from the appliance and conveyed by the chimney or vent system. 19. This type of appliance requires venting and installation in accordance with ANSI/NFPA Standard 31. 20. This flow in a chimney or venting system may differ from that in the appliance, depending on the type of draft control or number of appliances operating in a multipleappliance system.
DOWN 1. This draft is the natural draft produced by the buoyancy of hot gases in the chimney relative to cooler gases in the atmosphere. 2. This chimney flue gas temperature difference is the difference in temperature between the flue and atmospheric gases. 5. This minimum system coefficient in a gas vent with a draft hood is always 1.0 because all gases must accelerate through the draft hood from almost zero velocity to vent velocity. 6. These design and sizing factors allow for uncertainties of vent and chimney operation. 7. Fan-assisted combustion systems used to help
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Jim Fitzgerald, Robert Nevitt, and Michael Blasnik : Home energy :
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! Rob deKieffer : Home energy :
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