S44 -- Centrifugal Pumps (SI)

Centrifugal pumps provide the primary force to distribute and recirculate hot and chilled water in a variety of space-conditioning systems. The pump provides a predetermined flow of water to the space load terminal units or to a thermal storage chamber for release at peak loads. The effect of centrifugal pump performance on the application, control, and operation of various terminal units is discussed in Chapter 13. Other hydronic systems that use pumps include (1) condensing water circuits to cooling towers(Chapters 14 and 40), (2) water-source heat pumps (Chapter 9), (3)boiler feeds, and (4) condensate returns (Chapter 11). Boiler feed and condensate return pumps for steam boilers should be selected based on boiler manufacturers requirements.

Chapter Table of Contents

Centrifugal Pumping
Construction Features
Pump Types
Pump Performance Curves
Hydronic System Curves
Pump and Hydronic System Curves
Pump Power
Pump Efficiency
Affinity Laws
Radial Thrust
Net Positive Suction Characteristics
Selection of Pumps
Arrangement of Pumps
Motive Power
Energy Conservation in Pumping
Installation, Operation, and Commissioning
Troubleshooting

ISBN: 978-1-936504-26-8 (for SI versions of chapters)
ISSN: 1930-7705 (for SI versions of chapters)

Citation: 2012 ASHRAE Handbook -- HVAC Systems and Equipment: Chapter 44, Centrifugal Pumps



Product Code(s): D-S442012SI