Category Archives: Retrocommissioning Findings

These posts follow various retrocommissioning findings from discovery through implementation, verification and persistence.

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

Posted in Chillers and Chilled Water Systems, Operations and Maintenance, Retrocommissioning Findings, System Diagrams | Tagged , , | Leave a comment

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

Posted in Boilers, Hot Water Systems, and Steam Systems, Data Logging, Excel Techniques, HVAC Calculations, Retrocommissioning Findings | Leave a comment

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

Posted in Data Logging, Excel Techniques, HVAC Calculations, HVAC Fundamentals, Operations and Maintenance, Retrocommissioning Findings | Leave a comment

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

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Using Scatter Plots to Assess Building Performance–Part 7

A number of these posts have focused on a data cloud for an office/training facility located in Monterey California.  Much of the work associated with the examples I have used occurred as a part of a field class where we … Continue reading

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Using Scatter Plots to Assess Building Performance–Part 6

While teaching a class earlier today, I realized that there were a couple of useful techniques that I had yet to illustrate in terms of working with scatter plots.  These techniques are particularly useful in that they allow you to … Continue reading

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Using Scatter Plots to Assess Building Performance–Part 4

This post and several that follow will round out the video clips and information in the preceding posts in the string by providing a few additional examples of how interval data and scatter charts can be used to perform building … Continue reading

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