Ventilation Air Conditioning

Download 2012 ASHRAE Handbook - Heating, Ventilating, and by ASHRAE PDF

By ASHRAE

This instruction manual discusses numerous platforms and the apparatus (components or assemblies) they include, and describes beneficial properties and variations. this knowledge is helping method designers and operators in settling on and utilizing gear. This variation features a new bankruptcy 18, Variable-Refrigerant-Flow structures, which describes those structures, their parts, and acceptable criteria intimately, and contains a process layout instance and demanding counsel on bills, controls, and safeguard. This instruction manual is a reference for engineers operating in HVAC&R and for execs in allied fields. ASHRAE, based in 1894, is a global association of a few 50,000 people. ASHRAE fulfills its venture of advancing heating, air flow, air con, and refrigeration to serve humanity and advertise a sustainable international via examine, criteria writing, publishing, and carrying on with schooling.

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Additional info for 2012 ASHRAE Handbook - Heating, Ventilating, and Air-Conditioning Systems and Equipment (I-P Edition)

Sample text

Air-Handling UnitPsychrometric Processes............................. Air-Handling Unit Components................................................. Air Distribution ........................................................................ AIR-HANDLING SYSTEMS..................................................... Single-Duct Systems................................................................. Dual-DuctSystems................................................................... Multizone Systems....................................................................

If an energy analysis study is performed as part of the comparison between decentralized and centralized concepts, the resulting month-to-month energy data should be a good electronic document to benchmark actual energy consumption using the measurement and verification plan implementation. Ongoing commissioning or periodic recommissioning further ensures that the design intent is met, and that cooling and heating are reliably delivered after the warranty phase. Many central systems are designed and built with the intent to connect to facilities in a phased program, which also requires commissioning.

Some systems can maintain essentially constant space conditions. Removal and disposal of cold condensate from cooling coils, and capture and return of steam condensate from heating coils, is generally simpler and more practical in an all-air system. Operation and maintenance costs of central air-handling equipment are less than for many other terminal systems. Disadvantages Ducts installed in ceiling plenums require additional duct clearance, sometimes reducing ceiling height and/or increasing building height.

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