In many ways, Psychrometrics is like a Rubik’s Cube. Change one thing, and you automatically change something else. But instead of shifting colored cubes around, …
Calculating Humidification Loads for Economizer Cycle Systems: Humidification Basics Part 5
Now that we’ve learned how to calculate a basic humidification load, we need to understand how to do the same when an economizer cycle is …
Calculating Natural and Mechanical Loads: Humidification Basics Part 4
How do we determine how much moisture should be added to the air for a given application? In other words, how do we calculate the …
Psychrometrics Made Easy: Humidification Basics Part 3
What is psychrometrics? It’s a big and intimidating word to be sure and the common definition, the study of the physical and thermodynamic properties of gas-vapor …
Humidification Basics Part 2: Mastering Humidification Terms
Humidification is one of those areas where the terminology can often be a roadblock to understanding the topic. After all, we’re not all meteorologists! Since …
Humidification Basics: Why We Humidify in Building Design
Ever hear the phrase, “It’s not the heat, it’s the humidity”? It’s all about humidification in this Monday morning Minute series. In the commercial HVAC …
Parallel Pumping: 2-Position Control Valves on Multiple Cooling Towers (Part 5)
Over the last few weeks the Monday Morning Minutes posts have looked at pumping issues with multiple condensers and pumps. One of our most-received questions …
Parallel Pumping with Unequal Condensers (Part 4)
Over the last few weeks our Monday Morning Minutes posts have looked at pumping issues with parallel, equal-sized condensers and pumps. This week we will look …
Parallel Pumping in Condenser Applications: Automatic Differential Pressure Control (Part 3)
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 …
Parallel Pumps in Condenser Applications: Limiting the Flow Rate (Part 2)
In part 1 of this series we offered an example condenser water pumping system. The design of this example is 800 GPM per condenser for …