This guide discusses a variety of platforms and the apparatus (components or assemblies) they contain, and describes good points and variations. this data is helping approach designers and operators in picking out and utilizing gear. This variation features a new bankruptcy 18, Variable-Refrigerant-Flow platforms, which describes those structures, their parts, and acceptable criteria intimately, and incorporates a approach layout instance and significant suggestions on expenditures, controls, and protection. This guide is a reference for engineers operating in HVAC&R and for execs in allied fields. ASHRAE, based in 1894, is a world 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 resources for 2012 ASHRAE Handbook - Heating, Ventilating, and Air-Conditioning Systems and Equipment (I-P Edition)
Supply water reset may be used when peak capacity is not needed, potentially reducing energy consumption. This reduces chiller power input, but those savings may be offset by increased pump power input because of a higher water flow rate with higher supply temperature. Also, raising chilled-water temperatures diminishes the latent removal capacity of cooling and dehumidification equipment, and may adversely affect control of interior humidity. Energy implications on the whole system must be considered.
Org). Building air systems can be designed to provide complete sensible and latent cooling, preheating, dehumidification, and humidification capacity in air supplied by the system. No additional cooling or humidification is then required at the zone, except for certain industrial systems. Heating may be accomplished by the same airstream, either in the central system or at a particular zone. In some applications, heating is accomplished by a separate heat source. The term zoneimplies the provision of, or the need for, separate thermostatic control, whereas the term room implies a partitioned area that may or may not require separate control.
10 2012 ASHRAE Handbook-HVAC Systems and Equipment filed electronically in the central plant computer server for quick reference. Original basis of design and design criteria should be posted as a constant reminder of design intent, and to be readily available in case troubleshooting, expansion, or modernization is needed. As with all HVAC applications, for maintainable, long-term design success, building commissioning should include the system training requirements necessary for building management staff to efficiently take ownership and operate and maintain the HVAC systems over the useful service life of the installation.