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: …
The Bell and Gossett System Syzer and Pump Affinity Laws – to resolve a field problem (Part 2)
Printer Friendly (PDF) Last week we used the Pump Affinity Laws to determine what size the impeller would be trimmed to in an oversized pump. …
The Bell and Gossett System Syzer and Pump Affinity Laws – to resolve a field problem
Printer Friendly (PDF) The Pump Affinity Laws are used to determine the system curve. If we know the point of operation on a pump curve, …
The Bell and Gossett System Syzer and Pump Affinity Laws
Hydronic heating system flow rates and pressure drops are related through a series of AFFINITY LAWS. Let’s examine the laws and how to use them …
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 …