ISO 9001
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ISO 9001
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ISO 9001
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ISO 9001
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ISO 9001
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HVAC CASE STUDIES
ISO 9001
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ISO 9001
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12. This area of a commercial building has the greatest concentration of noise, heat load, smoke, and odors so the ventilation is the chief means of removing these objectionable elements and preventing them from entering dining and other areas. 14. This type of heating system is separate from the cooling system and is preferable because air distribution devices can then be selected for a specific duty rather than as a compromise between heating and cooling performance. 16. Generous sizing of these return air devices lowers the percentage of circuit resistance attributable to the return air path. 17. This type of commercial public building usually includes both peripheral and interior zone spaces, with the peripheral zone extending 10 to 12 ft inward from the outer wall. 18. This design criterion is often expressed as an NC level. 20. Along with fire, this can easily spread through elevator shafts, stairwells, ducts, and other routes in a commercial public building.
Answer
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ISO 9001
ACROSS 2. This type of recreational center generally has little fenestration area and has the greatest period of use in the evenings or weekend daytime. It may also contain a bar, restaurant, children’s play area, offices, and locker rooms. 5. This is measured by considering temperature, humidity, air motion, air quality, noise, and vibration. It is not identical for all building occupant activities or uses of space. 6. These profile curves consist of appropriate energy loads plotted against the time of day. 9. These must be taken into account in design considerations of commercial buildings and are often written and enforceable at local, state, and national levels. 10. Airports, ship docks, and bus terminals fall under this type of commercial facility classification because they generally operate on a 24- hr/day basis and require appropriate heating and cooling load analysis for equipment sizing. 11. In this type of facility, people are seated and served at tables where the ambient atmosphere should be such that the air conditioning is not noticed. 13. Revolving doors are one feature that can help combat this when stack effect is a factor in a commercial building 15. These types of towers are generally the largest single piece of equipment required for air conditioning systems and can take as much as 1 sq ft of area per 400 sq ft of total building area and be as much as 13 to 40 ft high. 19. Transferring air from dining areas into the kitchen keeps
this out of the dining area. 21. These are sometime served by a separate HVAC system because they buffer the outside atmosphere and the building interior. 22. Providing commercial buildings with 100% of this type of air is seldom justified. 23. This design approach is essential for achieving optimum results for the air conditioning systems in commercial buildings. DOWN 1. These types of commercial centers include telephone terminal buildings, radio stations, and television stations, and they generally require critical analysis for the elimination of heat buildup and control of noise. 3. Along with the building shape, this is often determined by the building site, and certain variations in these factors can increase refrigeration load by 10% to 25% 4. This type of commercial building is used to store merchandise or equipment or material inventory in industrial facilities. They may be open to the public at times but are not generally air conditioned, yet they often have sufficient heat and ventilation to provide tolerable working environments. 7. This type of temperature control, when done properly, maintains occupant comfort during varying internal and external load periods. 8. A factor that takes into account the load swings and noncoincident energy use in certain areas.
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ISO 9001
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. . . . . . . . . . . References 1. Bauman, F. 2003. Underfloor Air Distribution Design Guide. American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. 2. Webster, T., F. Bauman, J. Reese. 2002b. “Underfloor air distribution: thermal stratification.” ASHRAE Journal, May. 3. YORK International. 1999, “YORK Modular Integrated Terminals: Convection Enhanced Ventilation – Technical Manual.” 4. Webster, T., R. Bannon, D. Lehrer. 2002. “Teledesic Broadband Center Field Study.” Center for the Built Environment, University of California, Berkeley. April. 5. Bauman, F., P. Pecora, T. Webster. 1999. “How low can you go? Air flowperformance of low-height under-floor plenums.” Center for the Built Environment, University of California, Berkeley. October. 6. Tate. 2003. “Raised Access Floors and Office Acoustics.” Tate Technical Bulletin #235.
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ISO 9001
Garry Chelette :
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ISO 9001
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ISO 9001
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References American Society of Heating, Refrigerating and Air- Conditioning Engineers, 1996 ASHRAE Handbook, HVAC Systems and Equipment. I- P Edition, pp.10.3- 10.5. ITT Fluid Handling Training and Education, Domestic Pump Product Application and Sizing Manual, Bulletin No. TES- 676, Revision 1, pp. 4- 10, 32- 40. ITT Fluid Handling Training and Education, Hoffman Steam Heating Systems, Design Manual and Engineering Data, Bulletin No. TES- 181, pp. 7. Hydraulic Institute, American National Standard for Centrifugal and Vertical Pumps for NPSH Margin, ANSI/ HI 9.6.1- 1998, pp. 5.
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John Siegenthaler :
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ISO 9001
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ISO 9001
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ISO 9001
ISO 9001
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ISO 9001
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ISO 9001
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ISO 9001
HVAC
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