PS ASHRAE November Chapter Meeting

Hydronic Loops: Why design & modeling data don’t always match a building’s actual performance

Energy and hourly building models often include erroneous assumptions about the operation of hydronic coil control valves and associated devices. By understanding these assumptions, we can obtain a more realistic view of their actual performance. This presentation will examine the impacts of improper valve sizing, unstable system pressures and balancing device selection on hydronic systems, including the physical effects of poor valve authority and coil degradation. 

Date: November 11th 2015 – 11:30 am – 1 pm 
Location: Gameworks, Upstairs Room
1511 7th Ave Seattle, WA 98101  
Lunch Price: $35 members, $40 Guest, Students FREE

Outline: Hydronic Loop Performance:  Design vs. Installed

  • Design and Modeling Assumptions 
  • Hydronic heat transfer at the coil
  • Performance Problems
  • Valve Sizing
  • Static vs. Dynamic Balancing
  • Coil Performance
  • Potential Solutions
  • Pressure Independent Valves
  • Critical Zone Reset Strategy
  • Delta T Limiting strategies


Speaker Bio:

John Thorpe’s career encompasses both field technical and professional engineering experience spanning over forty years.  This experience includes 12 years of experience as an MEP engineering consultant, five years in electrical demand side management, five years as industrial process control field service technician, and four years as an ordnance mechanical in the United States Navy.

John graduated with a BSME from Portland State University in 1989, maintains a professional engineering license in the State of Washington, and is a past president of the ASHRAE Puget Sound Chapter (2004-2005) and Puget Sound Engineering Council (2003-2004).


November 11th, 2015 from 11:30 AM to  1:00 PM
1511 7th Ave
Gameworks, Upstairs
Seattle, WA 98101-98105
United States
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Event Fee(s)
Member $35.00
Guest $40.00
Student $0.00

Please provide some questions that you would like to be covered in the meeting.

Chapter Meeting Questions
Chapter Meeting Questions