Download Air Conditioning System Design Manual, Second Edition by ASHRAE Press PDF

By ASHRAE Press

The air-con guide used to be written to help entry-level engineers within the layout of air-conditioning platforms. it's also suable - in conjuction with primary HVAC&R resourcee fabric - as a senior- or graduate-level textual content for a school path in HVAC process layout. The handbook was once written to fill the void among conception and perform - to bridge the distance among real-world layout practices and the theoretical caluclations and analytical approaches or at the layout of parts.

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Sample text

Ventilation is not the only means of limiting contaminant levels, and it should not be considered a cure-all. 4. Source control, where practicable, is most effective. Building materials, such as carpet and wall coverings, should be selected for low emission of volatile organic compounds. Physical containment or segregation of emission sources may be appropriate. Indeed, control of some sources may be beyond the capabilities of even a well-designed ventilation system. The objectives and capabilities of a proposed ventilation system should be understood by all who are concerned with the construction and operation of the building.

Contaminant concentrations vary spatially as well as over time. These variations add further nonuniformity to pollutant concentrations. 1 provides the designer with a means of determining ventilation rates needed to achieve acceptable indoor air quality. The standard offers the designer two procedures for determining the required ventilation rate—the ventilation rate procedure and the indoor air quality procedure. The ventilation rate procedure provides prescriptive rates, usually on the basis of cfm [L/s] of outdoor air per occupant and unit area of floor, for an array of applications.

1 provides the designer with a means of determining ventilation rates needed to achieve acceptable indoor air quality. The standard offers the designer two procedures for determining the required ventilation rate—the ventilation rate procedure and the indoor air quality procedure. The ventilation rate procedure provides prescriptive rates, usually on the basis of cfm [L/s] of outdoor air per occupant and unit area of floor, for an array of applications. Unless unusual pollutants are present, these rates are intended to produce acceptable indoor air quality.

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