Download 2008 ASHRAE Handbook - Heating, Ventilating, and by American Society of Heating PDF

By American Society of Heating

ISBN-10: 1601197950

ISBN-13: 9781601197955

ISBN-10: 193374233X

ISBN-13: 9781933742335

The 2008 ASHRAE guide - HVAC platforms and gear discusses a number of structures and the gear (components or assemblies) that contain them, and describes beneficial properties and changes. this knowledge is helping approach designers and operators in determining and utilizing apparatus. it's divided into seven sections:

  • Air-Conditioning and Heating platforms
  • Air-Handling apparatus and parts
  • Heating apparatus and parts
  • Cooling gear and parts
  • General elements
  • Packaged, Unitary and Split-System apparatus
  • General
    This identify has been lately up to date with 221 Digitized Graphs and a couple of Interactive Tables protecting potency, radiation warmth flux, functionality, warmth loss and plenty of different precious themes.

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    Read Online or Download 2008 ASHRAE Handbook - Heating, Ventilating, and Air-Conditioning Systems and Equipment (I-P Edition) PDF

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    Additional resources for 2008 ASHRAE Handbook - Heating, Ventilating, and Air-Conditioning Systems and Equipment (I-P Edition)

    Example text

    Indirect evaporation adiabatically cools outside or exhaust air from the conditioned space by spraying water, then passes that cooled air through one side of a heat exchanger. Air to be supplied to the space is cooled by passing through the other side of the heat exchanger. Chapter 40 has further information on this method of cooling. Indirect Evaporative Cooling Fig. 4 Supersaturated Evaporative Cooling Fig. 5 Steam, Hot-Water, and Electric Heating, and Direct and Indirect Gas- and Oil-Fired Heat Exchangers Chapter 6 of the 2005 ASHRAE Handbook—Fundamentals details the psychrometric process of these methods.

    Both initial and operating costs affect design decisions. For example, the designer should not arbitrarily design for a 500 fpm face velocity, which has been common for selecting cooling coils and other components. Filter and coil selection at 300 to 400 fpm, with resultant lower pressure loss, could produce a substantial payback on constant-volume systems. Chapter 36 of the 2007 ASHRAE Handbook—HVAC Applications has further information on energy and life-cycle costs. 3 in. of water). It provides a positive return and exhaust from the conditioned area, particularly when mixing dampers allow cooling with outside air in intermediate seasons and winter.

    Single Fan With Reheat. There are two major differences between this and a conventional terminal reheat system: (1) reheat is applied at a central point in the fan unit hot deck instead of at individual zones (Figure 11), and (2) only part of the supply air is cooled by the cooling coil (except at peak cooling demand); the rest of the supply is heated by the hot-deck coil during most hours of operation. This uses less heating and cooling energy than the terminal reheat system where all the air is cooled to full cooling capacity for more operating hours, and then all of it is reheated as required to match the space load.

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    2008 ASHRAE Handbook - Heating, Ventilating, and Air-Conditioning Systems and Equipment (I-P Edition) by American Society of Heating

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