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.
There are many advantages to the traditional primary secondary chilled water design, overall simplicity being at the top of the list. So why has the industry leaned into variable primary…
Read MoreBy Chris Edmondson
There’s more than one way to pump a chiller or boiler system. In fact, there are five common approaches, and all but one includes some variation of our topic of late -- primary secondary pumping.
Variable Primary Pumping
Contemporary systems that do not utilize primary secondary pumping are typically known as variable primary systems. In this simple design, there is only one set of pumps (chiller or boiler pumps) creating flow for the entire system.
By Chris Edmondson
Piping in a primary secondary pumping systems as a whole can be quite complex, but when it comes to the “primary” part of the system, there are really only two approaches: Dedicated or Non-dedicated.
Figure 1 shows the chillers in a primary secondary system piped with one pump per chiller. If the chillers
By Chris Edmondson
Now that we know what happens when we vary flows and mix temperatures in a primary secondary pumping system, let’s explore these theories in some more realistic scenarios.
As discussed in a previous blogs, when it comes to primary secondary systems, one of three flow patterns is always in occurrence:
Read MoreBy Chris Edmondson
Low Delta T Syndrome. The terminology alone strikes fear in the hearts of anyone involved in chiller plant design or operation. We know Low Delta T Syndrome is bad. We know it wastes energy. The very topic has given rise to countless technical articles and white papers that most of us haven’t the time or patience read. But take heart because believe it or not, if you’ve read and understand Part 1 and Part 2 of this Series, you already have the building blocks to understand Low Delta T Syndrome. You just don’t know it yet.
Visit our Contact Page and let us know what information you'd like to receive.
Powered by Squarespace
