Added a webpage with Pneumatic Control Resources. These resources were originally located on a different "cloud" but I moved them to here to improve access and make them easier to organize and maintain. I have also added a little silent movie that provides an overview of pneumatic hardware that I have encountered on my EBCx projects along with animations that illustrate how one and two pipe pneumatic controllers work and a few bottom lines on the topic of pneumatic control and actuation.
Added my NCBC 2015 presentation about how to operate filters for best life cycle cost and the benefits associated with that approach, along with the ACEEE paper that I wrote with Mike Chimack on the same topic.
Added install files for older versions of SketchUp to the SketchUp Models page so that people with older machines that will not support the current 64 bit version of SketchUp can still work with the models if they want to.
Updated the models for the Chilled Water System Diagram exercise to the latest version of the models. The new models are not fundamentally different from the models that were there previously, but have more detail.
Added the most recent version of anEBCx Skills Guidebook that we use as a resource for a number of the technical classes that I teach. It is structured around the framework of the ten key commissioning skills that I discuss in my blog post titled Key Retrocommissioning Skills.
Added a 10 Skills Learning Objectives Checklist tool that complements the guidebook by providing a list of learning objectives for each of the skills that you can use to track your progress if you undertake a self study effort focusing on commissioning skills, in particular, existing building commissioning skills.
Added the materials from the PEC class last month titled RCx 101.
Added a cooling tower image slide show to the "What's That Thing" home page. I still need to add information describing the various images to the actual cooling tower page, but this is a start.
Fixed the problem I mentioned previously (see the 2017-05-22 "Head's Up") about the axis being mislabeled in the pump curve examples and in the sample Plot Digitizer Spreadsheet. I think I have all of them fixed now and a new version of the spreadsheet uploaded.
I managed to miss-label the axis on the pump curves and related images that I recently uploaded to the website; The Y axis should be head in ft.w.c. and the X axis should be flow in gpm. I have them the other way around; couldn't see the forest for the trees I guess. Specifically, the issue exists with the images on the Square Law formulas page, the Pump Digitizer Pump Curve Example page, and in the curves in the Pump Digitizer Spreadsheet tool you can download from that page. I will be fixing that and uploading new versions of the files, but I probably will not get to that for a day or two and wanted to let you know. The issue is purely a labeling issue with the axis and you can change it yourself if you have already downloaded a copy of the spreadsheet too. My apologies for the error, and my thanks to Sabastian St. John and Jay Cmiel for pointing it out to me.
A pump optimization case study that looks at how the dynamics of piping systems that have large pumps in parallel serving long, common headers can be leveraged to save energy.
A copy of a magazine article that I wrote for Consulting Specifying Engineer that looks at condenser water system piping design issues, where things are literally a game of inches. This item as well as the pump optimization case study complement a blog post I wrote about pump cavitation.
A Fisher Controls bulletin that discusses control valve cavitation that I reference in a blog post I wrote about pump cavitation.
A Plot Digitizer Pump Curve example, which is a spreadsheet that illustrates a pump curve created in Excel using Plot Digitizer data and which can serve as a template for creating your own Plot Digitizer generated pump and fan curves.