When using multiple parallel condensers with constant speed pumps, the flow rate at part load may be excessive and problematic. Our last blog on this …
Multiple Condenser Cooling Tower Pumps – “Solutions for Excessive Flow”
The design and flow balance in systems with multiple parallel condensers is straight forward. We should expect no issues at full capacity. What happens when …
Balancing Constant Speed Cooling Tower Pumps with Multiple Condensers
It is important to check the single pump operation when balancing parallel pumps for multiple constant speed cooling tower pumps. The condensers and pumps are …
Selecting Constant Speed Cooling Tower Pumps & Balance Valves with Multiple Condensers
It is important to check the single pump operation when selecting parallel pumps for multiple constant speed cooling tower pumps. In the last R. L. …
Constant Flow Cooling Tower Pumps & Variable Frequency Drives (VFD)
The blistering hot weather here in southeast Michigan caused me to turn my attention to cooling tower pumps and their control. Cooling tower pump control …
Hydronic Expansion Tank Location in High Rise Projects (Part 3)
Part 2 of this series on expansion tank locations showed the expansion tank in a high-rise hydronic system located at the top of the system. …
Hydronic Expansion Tank Location in High Rise Projects (Part 2)
Where should the hydronic expansion tank be in a tall high-rise hydronic system design? In part 1 of this article, I identified the size and …
Hydronic Expansion Tank Location in High-Rise Projects (Part 1)
We received an interesting question from an Ohio engineer working on the renovation of a 30-story high-rise hydronic heating system. This engineer was looking out …
Open Cooling Tower System Pumps – Balancing the Pump Using a Drive
Open cooling tower pumps are traditionally operated as constant speed. When balanced, the extra pump head or over-heading is throttled across the discharge balance valve …
Balancing & Trimming Hydronic Constant Speed Pumps
The HVAC hydronic system is proportionally balanced per ASHRAE 90.1 energy standards. The proportional balance, when properly completed, will result in all the extra pump …