The Clothing They Wear. Chemical feeders or “Pot-feeders” want to be fashionable too. Specifying a chemical feeder without a detail is like telling your son he should wear a suit to a special dinner. You assume he will wear socks and shoes, but can you be sure that he will?
Griswold Chemical Pot Feeders
“An old friend with several new twists” Chemical feeders or “Pot-feeders” have adorned mechanical equipment rooms for decades. R.L. Deppmann appreciates the specification and purchase of the Griswold 2 and 5 gallon feeders. Today, I’ll present a couple of the benefits both owners and installing contractors may enjoy when using the Griswold Feeders.
Heat Added to Chilled Water Systems Due to Pump Efficiency
We received an interesting question this week from a consultant engineer: “How much temperature increase will I get in the chilled water from the pump? My secondary chilled water pump has a capacity of 1400 GPM at 100 feet” Let’s look at the answer. ANSWER: Centrifugal pumps in hydronic systems do the work of moving gallons per minute of fluid against a differential head in feet. This work is defined as Brake Horsepower (BHP) also expressed in equation 1. [Read more…]
ITT Bell & Gossett Announcement
Printer Friendly (PDF) B&G Files in Revit 2010 Format You can now get NEW 3D Building Information Modeling files in Autodesk Revit 2010 format for: …
Selecting NeoTherm Boilers in High ΔT Systems
Printer Friendly (PDF) Over the last several weeks we outlined the use of primary secondary systems for high ΔT hydronic heating systems. This article will …
Selecting Laars NeoTherm Condensing Boilers
Printer Friendly (PDF) Over the last several weeks we outlined the use of primary secondary systems for hydronic heating systems. This article will address the …
Maximizing Delta T in Boilers
Printer Friendly (PDF) Last week, we created a chart showing the flow rates and temperatures in an example system so we could maximize the delta …
Increasing Delta T and Lowering Water Temperature in Hydronic Heating Systems
Printer Friendly (PDF) Last week, we used an AHU unit system example which showed the advantages of reducing the return water temperature at design, as …
Primary Secondary Tertiary Systems for High Delta T Hydronic Heating Systems
Printer Friendly (PDF) Last week the MMM article topic was primary secondary piping basics. Today we will describe some terms before looking at a more …
Primary-Secondary Systems with Different DeltaT
Condensing boilers become more efficient as the return water temperature becomes lower. To make the most of this investment in condensing boiler technology, the system …