Many seasoned engineers and contractors have retired or slowed down over the last four years. Our industry is blessed with many newer additions to …
Turndown Ratio in Condensing Water Tube vs. Fire Tube Boilers (Part 2)
Turndown Ratios may have two different meanings to engineers designing a hydronic heating system for building or process systems. The normal turndown is defined as …
Water Tube vs. Fire Tube Condensing Boilers (Part One)
The commercial condensing boiler market is flooded with choices. Once choice is obviously the manufacturer. But before you even get there the question could be, …
Chilled Water Coil Temperature Reset in Cold Winter Months
Many facilities require cooling during the cold winter months. Northern climates such as Michigan or Ohio may not have any latent load in the cold …
Primary-Secondary CHW Loops with Unequal Flow Rates
Primary-secondary hydronic system loops have a common pipe that facilitates flow in both directions when the two loops have different flow rates. That same common …
Water Side Economizers Part 11: Summary of Design Thoughts
We can conclude the series on waterside economizers with a summary of suggestions for the engineer to consider. ASHRAE 90.1 Energy Standards require this energy-saving …
Water Side Economizers Part 10: Heat Exchanger Fouling & Maintenance
Waterside economizer heat exchanger fouling can lead to significant operational cost for the owner of the commercial chilled water system. The water side economizer system …
Water Side Economizers Part 9: Heat Exchanger Pressure Drop
The water side economizer pressure drop is an important point for the engineer to consider. The ASHRAE 90.1-2013 energy standard requires the pressure drop of …
Water Side Economizers Part 8: The Heat Exchanger Approach
The gasketed plate heat exchanger and the capacities it should be scheduled at is the subject of today’s blog. The first seven parts of this …
Happy July Fourth Week – A few HVAC Facts from the Revolutionary Times
Happy Fourth of July! The celebration of the American Independence Day. Today’s Monday Morning Minutes from R. L. Deppmann will celebrate the fourth by sharing …