2012 ASHRAE Handbook - Heating, Ventilating, and - download pdf or read online


ISBN-10: 1621980359

ISBN-13: 9781621980353

ISBN-10: 1936504251

ISBN-13: 9781936504251

This guide discusses a number of platforms and the apparatus (components or assemblies) they include, and describes good points and transformations. this knowledge is helping approach designers and operators in identifying and utilizing gear. This variation encompasses a new bankruptcy 18, Variable-Refrigerant-Flow platforms, which describes those structures, their elements, and acceptable criteria intimately, and encompasses a procedure layout instance and critical counsel on expenses, controls, and defense. This guide is a reference for engineers operating in HVAC&R and for pros in allied fields. ASHRAE, based in 1894, is a world association of a few 50,000 people. ASHRAE fulfills its challenge of advancing heating, air flow, air-con, and refrigeration to serve humanity and advertise a sustainable global via learn, criteria writing, publishing, and carrying on with schooling.

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

Example text

Many jurisdictions require monitoring, alarms, evacuation procedures, separating refrigeration and fuel-fired equipment, and high rates of purge ventilation. A proper operating environment for equipment and those maintaining it must also be provided. This may involve heating the space for freeze protection and/or cooling the space to prevent overheating motors and controls. , switchgear room, office space, generator room, pump room, machine shop). Where refrigeration equipment is installed, follow design requirements in ASHRAE Standard 15.

Sedentary versus transient). ) Separate perimeter heating can operate with any all-air system. However, its greatest application has been in conjunction with VAV systems for cooling-only service. Careful design must minimize simultaneous heating and cooling. See the section on Variable Air Volume for further details. Interior spaces have relatively constant conditions because they are isolated from external influences. Cooling loads in interior zones may vary with changes in the operation of equipment and appliances in the space and changes in occupancy, but usually interior spaces require cooling throughout the year.

Steel to support roof-mounted equipment, or a concrete pad and structural steel needed to locate equipment at or near grade) require evaluation. When locating a cooling tower at or near grade, the net positive suction head and overflow of condenser water out of the cooling tower sump should be studied if the tower is below, at, or slightly above the level of the chiller. Numerous variables should be considered when determining the optimum location of a central cooling or heating plant. , oversizing the central plant now for adding more primary equipment later, based on master planning of the facility) Architectural effect on the site Location of boiler chimney/flue Loading dock for materials and supplies Roadway and parking considerations Storage of fuel Electrical transformer location Underground and/or overhead utility and central cooling and heating system distribution around the central plant and to the building (s) Wind effect on cooling tower plume or other volatile discharges such as boiler emissions.

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

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