Chapter 5
Hot Water Systems
Publication: Premise Plumbing Modeling
Abstract
Hot water systems have different characteristics than cold water systems because they have hot water tanks and recirculation systems, which require various constraints such as energy use, water quality, scalding risk, and conservation issues. This chapter presents a comprehensive discussion of the special features required for dealing with hot water in premise plumbing systems, including hot water systems, recirculation systems, use of simulation modeling for energy use, and impacts of codes and standards. The state of California has a building energy efficiency standard that requires construction companies to demonstrate that a new building meets specific energy efficiency targets. The objective is to consider the impact of different types of building hot water use and distribution systems on performance in California's new buildings. The chapter also discusses the impact of codes and technology on Legionella risk, scalding risk, and energy efficiency in building water systems.
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References
Hiller, C. C. 2006. “Hot water distribution system piping time, water, and energy waste—Phase I: Test results.” ASHRAE Trans. 112 (1): 415. http://www.techstreet.com/cgi-bin/detail?product_id=1718782.
Hiller, C. C. 2008. “Hot water distribution system piping heat loss factors, both in air and buried—Phase II: Test results.” ASHRAE Trans. 114 (2): 109–118.
Hiller, C. C. 2011. “Hot-water distribution system piping heat loss factors—Phase III: Test results.” ASHRAE Trans. 117 (1): 727–742.
Klein, G., J. Lutz, Y. Zhang, and J. Koeller. 2021. Final report: Code changes and implications of residential low flow hot water fixtures. Final Project Report to the California Energy Commission. Publ. No. CEC-500-2021-043. Accessed August 22, 2023. https://www.energy.ca.gov/sites/default/files/2021-09/CEC-500-2021-043.pdf.
Zlatanovic, L., A. Moerman, J. P. van der Hoek, J. Vreeburg, et al. 2017. “Development and validation of a drinking water temperature model in domestic drinking water supply systems.” Urban Water J. 14 (10): 1031–1037.
Information & Authors
Information
Published In
Premise Plumbing Modeling
Pages: 87 - 98
Editors: Juneseok Lee, Ph.D., P.E., D.WRE, Jonathan B. Burkhardt, Ph.D., Steven Buchberger, Ph.D., P.E., Walter Grayman, Ph.D., P.E., D.WRE, Terranna Haxton, Ph.D., Robert Janke, Regan Murray, Ph.D., and William E. Platten III, Ph.D.
ISBN (Online): 978-0-7844-8510-1
Copyright
© 2023 American Society of Civil Engineers.
History
Published online: Oct 13, 2023
ASCE Technical Topics:
- Construction engineering
- Construction management
- Disaster risk management
- Energy efficiency
- Energy engineering
- Energy sources (by type)
- Engineering fundamentals
- Environmental engineering
- Equipment and machinery
- Hydro power
- Hydrologic engineering
- Hydrologic properties
- Hydrology
- Renewable energy
- Risk management
- Standards and codes
- Tanks (by type)
- Water and water resources
- Water circulation
- Water conservation
- Water management
- Water policy
- Water quality
- Water tanks
- Water treatment
Authors
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