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Highlights of Revisions for 2008
The 2008 ASHRAE Handbook鈥擧VAC Systems and Equipment discusses various systems and the equipment (components or assemblies) that comprise them, and describes features and differences. This information helps system designers and operators in selecting and using equipment.
This edition includes two new chapters, described as follows:
Chapter 16, Ultraviolet Lamp Systems, includes a review of the fundamentals of UVC germicidal energy鈥檚 impact on microorganisms; how UVC lamps generate germicidal radiant energy; common approaches to the application of UVGI systems for upper-air room, in-duct, and surface cleansing; and a review of human safety and maintenance issues.
Chapter 17, Combustion Turbine Inlet Cooling (CTIC), provides a detailed discussion of how CTIC is used to help improve combustion turbine performance.
Some of the revisions and additions to the remainder of the volume are as follows:
Chapters 1 to 5 have each been revised to include new system and process flow diagrams, plus new discussion content on commissioning, building automation, maintenance management, sustainability/green design, security, and various systems (e.g., underfloor air distribution, chilled beams).
Chapter 7, Combined Heat and Power Systems, formerly entitled Cogeneration Systems and Engine and Turbine Drives, was reorganized, as well as updated for new technology.
Chapter 11, District Heating and Cooling, has new guidance on construction cost considerations, central plants, and distribution systems.
Chapter 12, Hydronic Heating and Cooling, has revised text and figures on all aspects of system design, including design procedure, water temperatures, heat transfer, distribution losses, constant- and variable-speed pumping, sizing control valves, and terminal units.
Chapter 18, Duct Construction, has new guidance for installation of flexible ducts.
Chapter 19, Room Air Distribution Equipment, was reorganized to coordinate with its companion chapter in HVAC Applications, with added content on equipment for stratified and partially stratified systems.
Chapter 24, Mechanical Dehumidifiers and Related Components, has new content on installation and service, indoor pool dehumidifiers, and application considerations for various equipment types.
Chapter 30, Automatic Fuel-Burning Systems, extensively reorganized and revised, contains updated information on new technology and code requirements.
Chapter 31, Boilers, has new material on condensing boilers, burner types, and operating and safety controls.
Chapter 32, Furnaces, has been thoroughly revised to reflect new technology and code requirements.
Chapter 34, Chimney, Vent, and Fireplace Systems, has been reorganized for clarity and has new content on designing fireplaces and their chimneys.
Chapter 36, Solar Energy Equipment, has been reorganized and has new content on photovoltaic systems and testing/rating.
Chapter 37, Compressors, has been reorganized and has updates on bearings and variable-speed drive technology.
Chapter 38, Condensers, contains revised content on air-cooled condensers, particularly on type descriptions, heat transfer, pressure drop, testing/rating, and installation and maintenance.
Chapter 40, Evaporative Air Cooling Equipment, has a rewritten section on indirect coolers.
Chapter 42, Liquid-Chilling Systems, has new discussion on both refrigerant selection and variable-flow chilled-water systems, as well as new and improved figures.
Chapter 44, Motors, Motor Controls, and Variable-Speed Drives, has updates for new technology and codes.
Chapter 48, Unitary Air Conditioners and Heat Pumps, has new content on multisplit units, variable-refrigerant-flow (VRF) equipment, certification, and sustainability.
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