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In our last blog we introduced the new HI Energy Rating System for clean water pumps. The HI Rating System not only helps engineers pick a more efficient pump, it also makes it easy for utilities to develop incentives that rewards owners for using HI Rated equipment. Several US utilities are already onboard…
Read MoreIt makes sense to select a pump based on a wide range of operating conditions, not just peak load. This will yield more savings than a pump selection based on the singular sweet spot of Best Efficiency Point (BEP). Instead of focusing on that point where the system curve intersects with the BEP, we need to look at a broader operating range, the boundaries of which form what is called an “Efficiency Island”. Efficiency Islands are....
Read MoreBalancing isn’t just about adjusting valves. Sometimes (very often in fact) it is about evaluating the performance of the pump(s) under real world operating conditions. Remember what ASHRAE 90.1 has to say about Hydronic System Balancing: “Hydronic systems shall be proportionately balanced in a manner to first minimizethrottling losses; then the pump impeller shall be trimmed or pump speed shall be adjusted to meet...
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