To place a point on the chart, you click on the Add a Point button in the Psychrometric Process window, which will add a row to the table and open a sub-window in the lower portion of the main window, which is where you will eventually enter you data. Once you have the window open you can adjust the size and column width if you want to by dragging and clicking the boarders of the window or the column dividers.Įven in the basic version of the chart, there are a number items you can manage in the psychrometric process window, including naming a point, controlling where the label sits relative to the point, the air flow you are dealing with for your process and its units of measure, and the type of process. To start, you need to open the Psychrometric Process window, which is accessible from the Analysis drop down menu. The Impact of Sensible Heat Ratio on Cooling Coil Leaving ConditionsĪs a starting point, let’s plot the “generic” ASHRAE standard space condition of 75☏ and 50% relative humidity and then read all of the other psychrometric parameters off of the chart.The Return to Contents like at the end of each section will bring you back here.

The links below will jump you to topics of interest, since this is another long post. (You remember paper, right?) Contentsįor this post, I thought I would focus on what the basic version of the chart can do by using an example. I also should mention that while I am writing this and using the PG&E electronic chart to illustrate things, the basic psychrometric concepts and techniques I discuss will work for any psych chart, including a paper one. So a big thank you to Ryan for making this available to the industry and to Hands Down Software for offering the discount. That’s about a 30% discount relative to what the Hands Down chart would cost if you just went and bought it on your own. pdf of your chart, and copy the image to your clipboard for use in a report or presentation.Īnd, if you find yourself using it a lot and wishing you had all of the features associated with the full blown version of the Hands Down Software chart, you can upgrade it for a one time licensing fee of $160. Once its up and running, you should have a window that looks like this.Įven though it is a limited version, it is still a very useful tool since it allows you to plot points, read the parameters associated with the location of your cursor, create a. You can get a copy at this link and a overview document that also includes the download link here. Ryan Stroupe of the Pacific Energy Center recently worked out a deal that allows him to provide a free limited capability version of Hands Down Software’s electronic psych chart.

Psychrometric chart excel