Designing Waterside Economizer Piping to Meet ASHRAE 90.1 - 2010
/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.
ASME Hydropneumatic Tanks Play An Important Role in Pressure Booster Systems
/“Do I really need a hydro-pneumatic tank on my variable speed pressure booster?”
It’s a question many engineers will ask, particularly after ASHRAE 90.1 – 2010 takes effect in commercial building codes as early as October of this year. As we discussed in an earlier blog on variable speed pressure boosting, the new ASHRAE standard no longer permits pressure reducing devices to reduce the pressure of water supplied by booster system pumps. This essentially puts an end to constant speed pressure boosting, which brings variable speed to the forefront. But since the whole point of variable speed pumping is to more accurately align demand with supply, why would hydro-pneumatic tank still be required?
ASHRAE Pipe Sizing Requirements Are Changing – System Syzer Makes It Easy!
/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.
Read MoreASHRAE (and DOE) Get More Specific About Economizer Requirements
/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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