S12 -- District Heating and Cooling (SI)

District heating and cooling (DHC) or district energy (DE) distributes thermal energy from a central source to residential, commercial, and/or industrial consumers for use in space heating, cooling, water heating, and/or process heating. The energy is distributed by steam or hot- or chilled-water lines. Thus, thermal energy comes from a distribution medium rather than being generated on site at each facility.

Whether the system is a public utility or user owned, such as a multibuilding campus, it has economic and environmental benefits depending somewhat on the particular application. Political feasibility must be considered, particularly if a municipality or governmental body is considering a DHC installation. Historically, successful DHC systems have had the political backing and support of the community.

Chapter Table of Contents

Economic Considerations
CENTRAL PLANT
Heating and Cooling Production
Distribution Design Considerations
DISTRIBUTION SYSTEM
Hydraulic Considerations
Thermal Considerations
Methods of Heat Transfer Analysis
Expansion Provisions
Distribution System Construction
CONSUMER INTERCONNECTIONS
Components
Heating Connections
Chilled-Water Connections
Temperature Differential Control
Metering
Operation and Maintenance

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

Citation: 2012 ASHRAE Handbook -- Systems and Equipment: Chapter 12, District Heating and Cooling



Product Code(s): D-S122012SI