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.
Chilled 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 MoreIn Part 1 of this series we offered an example of a condenser water pumping system with 800 GPM per condenser for a total of 1600 GPM with the third condenser serving as standby. The tower elevation or lift is 10 feet, the condenser (with the 2-way valve and balance valve) has 20 feet of pressure drop, and the common piping with any safety factor has 30 feet of pressure drop. But there was a problem....
Read MoreApplying a single constant speed pump for each condenser in a chilled water application is a normal design for the HVAC engineer. Some chiller manufacturers suggest piping the pumps with a common header and activating each pump as the condensers are staged on. However, there is a hidden issue with this approach, which, if not addressed may cause major problems....
Read MoreIn 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 More
Visit our Contact Page and let us know what information you'd like to receive.
Powered by Squarespace
