By American Society of Heating Refrigerating and Air-Conditioning Engineers

This reference covers the apparatus and platforms for functions except human convenience, together with info on cooling, freezing, and storing nutrition; commercial functions of refrigeration; and low-temperature refrigeration. basically for the training engineer, this quantity is additionally helpful for an individual fascinated about cooling and garage of nutrition items. An accompanying CD-ROM includes the entire volume's chapters in either I-P and SI devices. The version comprises new chapters. bankruptcy three, Carbon Dioxide Refrigeration platforms, describes the heritage of this ''natural refrigerant'' and why it's the topic of renewed curiosity this day. bankruptcy 50, Terminology of Refrigeration, lists many of the universal phrases utilized in commercial refrigeration platforms. additionally new for this quantity, bankruptcy order and groupings were revised for extra logical circulation and use.

ASHRAE, based in 1894, is a global association of a few 50,000 folks. ASHRAE fulfills its project of advancing heating, air flow, air con, and refrigeration to serve humanity and advertise a sustainable international via learn, criteria writing, publishing, and carrying on with schooling.

The ASHRAE Handbooks are the layout general for regulate of outfitted environments with volumes on platforms and kit, HVAC purposes, Refrigeration and basics. each one is up-to-date each 4 years. as well as publishing layout counsel for engineers, architects, and facility managers, we additionally submit a sequence of texts for lecture room use.

a number of the components we put up in include:
-Energy Modeling and Auditing
-High functionality construction Design
-Indoor Air caliber and Environmental Quality
-Data heart power Efficiency
-Noise & Vibration Control
-Humidity Control
-HVAC for Healthcare Facilities

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Read or Download 2010 ASHRAE Handbook - Refrigeration (SI) (includes CD in I-P and SI Editions) (Ashrae Handbook Refrigeration Si (Systems-International)) PDF

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Additional resources for 2010 ASHRAE Handbook - Refrigeration (SI) (includes CD in I-P and SI Editions) (Ashrae Handbook Refrigeration Si (Systems-International))

Sample text

Therefore, positive oil return to the compressor must be ensured. There are many methods, including oil stills using both electric heat and heat exchange from high-pressure liquid or vapor. Some arrangements are discussed in Chapter 1. At low temperatures, oil skimmers must be used because oil migrates to the top of the lowpressure receiver. Build-up of excessive oil in evaporators must not be allowed because it rapidly decreases efficiency. This is particularly critical in evaporators with high heat transfer rates associated with low volumes, such as flake ice makers, ice cream freezers, and scrapedsurface heat exchangers.

System evacuation and charging procedures are similar to those for other systems. The system must be operating under normal conditions to determine the total required refrigerant charge. Liquid height is established by liquid level indicators in the low-pressure receivers. Calibrated, manually operated regulators should be set for the design conditions and adjusted for better performance when necessary. When hand expansion valves are used, the system should be started by opening the valves about one-quarter to one-half turn.

Angle or full-flow ball valves should be used. Using valves with horizontal valve spindles eliminates possible traps. Gas binding is more likely with high evaporating pressures. Installing discharge check valves prevents backflow. Relief valves should be used, particularly for positive-displacement pumps. Strainers are not usually installed in ammonia pump suction lines because they plug with oil. Strainers, although a poor substitute for a clean installation, protect halocarbon pumps from damage by dirt or pipe scale.

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