Thinking Beyond Plate & Frame Heat Exchangers for Waterside Economizing

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By Chad Edmondson

  “What type of heat exchanger is best for my waterside economizer application?”

 It’s a question we get asked a lot.  With the increased requirement for either an air or waterside economizing in ASHRAE 90.1 – 2010, we expect to get asked even more – especially since the DOE expects states to adopt the revised standard into their non-residential building codes by as early as next month.

 U-Factor Versus Real-World-Factor

Conventional engineering logic has always leaned toward plate and frame technology for waterside

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Pump Affinity Laws Are Key To Saving Money in a Hydronic System

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What are the pump affinity laws and why are they so important? 

Pump affinity laws define the mathematical relationship that exists between pump speed, flow, total head, and power consumption.

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Designing Waterside Economizer Piping to Meet ASHRAE 90.1 - 2010

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By Chris Edmondson 

Gone are the days of optional air or waterside economizing.  Gone also are the days of waterside economizers piped in parallel.  In other words, the “either/or” operation of the chillers and economizers that we’re all accustomed to will soon be a thing of the past.

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ASHRAE Pipe Sizing Requirements Are Changing – System Syzer Makes It Easy!

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Bell & Gossett’s System Syzer does all the piping calculations necessary to meet ASHRAE 90.1 and 189.1 requirements. JMP is committed to getting all our customers up-to-speed on ASHRAE 90.1 – 2010. We’ve already covered some of these topics in previous blogs, including changes to pressure booster design.  Today’s blog focuses on the portions of 90.1 - 2010 that dramatically impact the selection of pumps and associated piping.

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ASHRAE (and DOE) Get More Specific About Economizer Requirements

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By Chris Edmondson

It’s time we all start economizing – and no, we’re not talking about budget.

ASHRAE 90.1 – 2010, which officially becomes part of U.S. commercial building codes in less than one year dictates that henceforth all cooling systems shall include either an air or water economizer per Sections 6.5.1.1 through 6.5.1.4. The only areas in the U.S. where this will not apply are the southernmost tip of Florida and south/southwest portions of Arizona where the respective climates do not favor economizing.

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