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In our last two blogs, we discussed Part Load Efficiency Value (PLEV) from Bell & Gossett. Today we will discuss how using PLEV as the only criteria for selection can lead to HVAC pump selections that aren’t necessarily the best choice...
Read MoreIn our last blog post, we introduced the PLEV, or Part Load Efficiency Value from Bell and Gossett. This week we look at some selections and how to use PLEV.
PLEV was created to give a weighted average of the pump efficiency for the HVAC and plumbing industry. This new efficiency average gives the engineer or designer an efficiency that is most likely a better representation of the actual...
Read MoreAlthough the DOE’s new pump efficiency standards raise the bar for manufacturers to build more efficient pumps, its rating system should not be looked at as a shortcut to efficient pump selection. Careful consideration of part load efficiencies applied to realistic load profiles is still the only way ...
Read MoreUnder the DOE’s new efficiency standards for pumps, all Pump Efficiency Rating (PER) values use a full size or maximum impeller for a given pump and start at the pump’s best efficiency point (BEP). As you may recall from our last post, the new efficiency standard includes two versions of.....
Read MoreNow that the U.S. Department of Energy (DOE) has published the first ever Energy Conservation Standards for Pumps, let’s take a look at some of the finer details of that standard, starting with the associated terminology and what it means...
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