Click the Image to Visit Our Commissioning Resources Website
Category Archives: Retrocommissioning Findings
A Control Logic Exercise and a Way to Get Comfortable With Navigating SketchUp Models
As many of you know, I have been experimenting with using SketchUp models as a way to teach EBCx techniques. I frequently use them in my classes and also have started to post self-study exercises that are based on the … Continue reading
Cooling Tower Flow Distribution and Variable Flow in Condenser Water Systems
One of my current obsessions is how subtle details regarding how you pipe a cooling tower can make a huge difference in how the flow is distributed. I’ve been interested in that for a long time actually as the result … Continue reading
An Existing Building Commissioning Learning Opportunity
The picture above is a panorama I shot earlier this year in a recently renovated central chilled water plant serving a large high-rise office building in down town San Francisco. The people in the picture are students in the Existing … Continue reading
Posted in Retrocommissioning Findings
Leave a comment
The Persistence of the Benefits of Commissioning (Plus a Few Pictures of Legacy Instruments)
As you probably have noticed if you follow the blog, I love finding old instruments in my travels. I have even been lucky enough to save a few of them from the dumpster, like this resonant frequency-based tachometer … … Continue reading
Resources for the Resourceful – Utility Analysis Spreadsheet Tool
Authors Note: Since the point in time when I published this post, some of the links have expired. So, I have gone through it and renewed them and also made a few edits. Linking to the Weather Data Depot in … Continue reading
Pneumatic Controls Resources
Author’s Note: I originally published this post on March 3, 2013. At that time, all of the resources I mention below were loaded up in “the cloud” on a Google Drive. Since that time, I have created the commissioning resources … Continue reading
Condenser Water Systems, Air Entrainment, and Pump Cavitation
This post is the result of a discussion I was having as the result of a comment made on a previous post about commissioning a condenser water system. The initial question was to ask if the solution I had suggested … Continue reading
Retrocommissioning Findings: Reducing Boiler Purge Cycle Losses–How I Obtained My Results
This post expands on what I did in the final section of the last post to show how I arrived at the answers I arrived at. Before proceeding, I want to emphasize that what I am about to show is … Continue reading
Retrocommissioning Findings: Reducing Boiler Purge Cycle Losses
Greetings after another break in the action in terms of my posting rate. As those of you who follow this blog know, sometimes, I get pretty busy and since writing this is not exactly my “day job’, my posting rate … Continue reading
Aliasing and Other Factors Affecting the Accuracy of Field Data
One of the challenges we face when we work with building systems is capturing enough sufficiently accurate data to paint a true picture of what is going on. This is harder than it sounds for a number of reasons, including … Continue reading
A Field Perspective on Engineering 