Download PDF by American Society of Heating Refrigerating and: 2010 ASHRAE Handbook - Refrigeration (SI Edition)

By American Society of Heating Refrigerating and Air-Conditioning Engineers

ISBN-10: 1613446683

ISBN-13: 9781613446683

ISBN-10: 1933742828

ISBN-13: 9781933742823

This instruction manual covers the refrigeration gear and platforms for purposes except human convenience. This publication comprises info on cooling, freezing, and storing foodstuff; commercial functions of refrigeration; and low-temperature refrigeration. basically a reference for the working towards engineer, this quantity is usually invaluable for a person interested in cooling and garage of foodstuff items. This version comprises new chapters. bankruptcy three, Carbon Dioxide Refrigeration platforms, describes the background of this "natural refrigerant" and why it's the topic of renewed curiosity this day. The bankruptcy comprises dialogue and diagrams on CO2 refrigerant purposes, procedure layout, apparatus, security, lubricants, commissioning, operation, and upkeep. bankruptcy 50, Terminology of Refrigeration, lists a few of the universal phrases utilized in commercial refrigeration structures, quite platforms utilizing ammonia because the refrigerant.

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Additional info for 2010 ASHRAE Handbook - Refrigeration (SI Edition)

Example text

Rotor arrangements include positive rotary, centrifugal, and turbine vane. Positive rotary and gear pumps are generally operated at slow speeds up to 900 rpm. Whatever type of pump is used, take care to prevent flashing at the pump suction andor within the pump itself. Centrifugal pumps are typically used for larger volumes, whereas semihermetic pumps are best suited for halocarbons at or below atmospheric refrigerant saturated pressure. Regenerative turbines are used with relatively high pressure and large swings in discharge pressure.

Another concern is that more energy is required to compress refrigerant to a given condenser pressure as the suction gas gains more superheat. This can be seen by examining a pressure-enthalpy diagram for a given refrigerant such as R-22, which is shown in Figure 2 in Chapter 30 of the 2009 ASHRAE Handbook-Fundamentals. As suction superheat increases along the horizontal axis, the slopes of the constant entropy lines of compression decrease. This means that a greater enthalpy change must occur to produce a given pressure rise.

V. 1970. Pumps and piping in liquid overfeed systems. ASHRAE Symposium Bulletin KC-70-3 : Liquid overfeedsystems. Slipcevic, B. 1964. The calculation of the refrigerant charge in refrigerating systems with circulation pumps. KaItetechnik4:1 11. B. 1970. Control of evaporators in liquid overfeed systems. ASHRAE Symposium Bulletin KC-70-3 : Liquid overfeedsystems. E. 1956. Improving refrigeration systems by applyingestablished principles. Industrial Rebigeration (June). 0 2010, American Society of Heating.

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2010 ASHRAE Handbook - Refrigeration (SI Edition) by American Society of Heating Refrigerating and Air-Conditioning Engineers

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