JMP is excited to announce our new technical HVAC magazine! It is a great resource to get bite-sized educational pieces similar to the content featured in our seminars. Register to have the latest blog sent to your email address.
Over the last few weeks we've looked at pumping issues with parallel equal sized condensers and pumps. This week we will look at the parallel condenser systems where the condensers are different types or sizes.
Read MoreChilled water condensers are normally operated as constant flow devices and the pumps serving them are constant speed. Why would you ever use a variable speed drive for a pump in this application? This week we show you a couple of reasons...
Read MoreWe recently introduced the part load efficiency value (PLEV) aspect of the Bell & Gossett online pump selection tool. PLEV for pumps is based on flow rate while the Integrated Part Load Value (IPLV) for chillers is based on load. This final segment on PLEV will look at the difference.
Let’s begin by examining....
Read MoreIn our last blog we explained why in real life HVAC applications, variable speed pumps almost never operate at zero speed. Even at no flow, the impeller must be spinning enough to produce some amount of pressure at the 2-way valve in order to quickly establish full flow at the critical circuit IF demand suddenly occurs. Here's a silly way to think about it....
Read MoreIn variable speed pumping systems, does zero load ever result zero pump speed?
Practically speaking, the answer is no. In closed hydronic systems with 2-way valves there is almost always some amount of differential pressure created by continuous impeller rotation – even when....
Read More
Visit our Contact Page and let us know what information you'd like to receive.
Powered by Squarespace
