Full Description

Centrifugal pumps provide the primary force to distribute andrecirculate hot and chilled water in a variety of space-conditioning andplumbing systems. The pump provides a predetermined flow of water to the spaceload terminal units or to a thermal storage chamber for release at peak loads.The effect of centrifugal pump performance on the application, control, and operationof various terminal units is discussed in Chapter 13. Other hydronic systemsthat use pumps include (1) condensing water circuits to cooling towers(Chapters 14 and 40), (2) water-source heat pumps (Chapter 9), (3) boilerfeeds, and (4) condensate returns (Chapter 11). Boiler feed and condensatereturn pumps for steam boilers should be selected based on boilermanufacturer's requirements. Centrifugal pumps can also be found in watertreatment and service water-heating systems.

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

ISBN: 978-1-947192-52-2 (for I-P versions of chapters)
ISSN: 1078-6066 (for I-P versions of chapters)

Citation: 2020 ASHRAE Handbook -- HVAC Systems and Equipment