Easing Transitions between Flat Plate and Chiller: Strategies to Reduce Surge and Maintain Building Load Efficiently
Transitions between waterside economizer mode (flat plate heat exchanger) and mechanical cooling mode (chiller) in a chilled water plant are a common challenge facing facility teams, controls contractors, and mechanical designers. Due to these difficulties many economizers are underutilized or abandoned entirely.
In this session, attendees will learn strategies to:
1) reduce chiller surge at low load and low ambient temperature.
2) place demand limits preventing unnecessary stage-up.
3) optimize and maximize waterside economizer operation.
4) ease the transitions between chiller and economizer modes.
We will review operational strategies to reduce the stress and impact of mode transitions and improve winter and shoulder season operation. Our focus is a plant piping configuration with the heat exchanger and chillers sharing a condenser water sump and the heat exchanger is piped in series with the chillers.
Chris Jackson, PE, LEED-AP, is Vice President of Business Development/Principal Engineer at ETC Group. Chris is the key member in establishing and driving ETC Group’s Arizona branch, which represents nearly 50% of the company’s project work since 2016 and helped one Arizona client cut more than $10 million/year in energy cost.
Chris graduated with B.S. in Chemical Engineering from the University of Utah in 2005 and earned MBA from the University of Utah in 2007. Chris is a licensed Professional Engineer in 4 states and was recently named a 2021 recipient of Consulting-Specifying Engineer’s 40 Under 40 Award.