Psycometric chart software

Also, create custom labels anywhere on the chart. Email a list of all the points and their properties for a completed chart, along with a PDF of the chart itself.

Create an unlimited number of psychrometric chart projects. Also, you can create templates that you can reuse over and over again. Zoom in or out of the chart by "pinching" the iPad screen to view items in detail. Purchase Understanding Psychrometrics, 3rd ed. Understanding Psychrometrics serves as a lifetime reference manual and basic refresher course for those who use psychrometrics on a recurring basis and provides a four- to six-hour psychrometrics learning module to students; air-conditioning designers; agricultural, food process, and industrial process engineers; meteorologists and others.

However as one of my aims with this tool is to highlight the differences between using relative and absolute humidity, I would argue that it is a widely used term that, as long as the units being used to measure it are clearly displayed, is sufficiently well understood to warrant its use as a lexical counterpoint to relative humidity.

Each of these overlays are generated as contours of an underlying grid of comfort values calculated over the whole chart. Additional parameters that govern these comfort values are displayed as dynamic sliders immediately beneath the selector. Press and drag any slider to adjust its value or double-press to display a numeric value editor as a popover.

In addition to comfort data, you can also overlay lines that represent standard psychrometric processes such as sensible heating and cooling or humidification, etc. These lines project from the current indicator position and update automatically and dynamically whenever the indicator position is changed.

You can also add and edit your own points within the chart to create custom annotated process lines. These can be created manually, saved or imported back in. Do this for each process point to create the line you require.

The app also allows some customisation and refinement of how it is displayed and some of the visual presentation. This includes being able to set the chart extents, titles and data scales, as well as padding and grid cell gaps. This is the small cursor that you can interactively drag around the chart to show the psychrometric conditions at that point.

When off, the data values shown in the top-left of the chart are also hidden. The displayed points then show the average hourly values over the currently selected period. Updated the Show Daily Outline overlay so that it shows hourly data points averaged over the current date period.

Previously, selecting this overlay would lock the date range to a single day. Now selecting this overlay will automatically set the date range to a single day, but you can then choose a multi-day time range using the date range buttons Year, Month, Day or by dragging the handles in the date range selector.

When displaying a comfort overlay with data points loaded, you can now generate a short report showing the number and percentage of points inside and outside the displays comfort band s. Added the P key as a keyboard shortcut for adding a new process point at the current indicator position. This editor allows you manually enter values for each slider using the system keyboard or small calculator buttons.

Fixed an issue with touch input where dragging the indicator to a new position after adding a process point moved the previously added point as well as the indicator. This and your other projects are great examples of high diligence and skill at presenting a confusing subject. Thanks for the effort. Very helpful in my efforts to seek paths toward moderation in air conditioning use here in SE Asia. One question: is there some info on data format to import spreadsheet data from non EnergyPlus sources?

As you say, you can load in CSV data by simply pasting it into the text area in the import dialog. To do this, it is important that the data only has a single header line defining all the columns, such as:. Also, you must have a full annual hourly data set with at least lines for it to load automatically. Then, any unassigned hours will default to zero values. First of all, great tool - look forward to using it! Wanted to give you some feedback on IP units to use.

Vapor pressure would be inches of mercury. Please reach out if you have other questions - would love to help! Once I was mostly done, I was looking around for a way to check and validate my changes when I noticed that the people who wrote PsychroLib had just done pretty well exactly the same thing in late November, and had unified SI and IP units together. I thought about just referencing their libraries, but there were a couple of optimisations I wanted to keep and I needed to calculate dew point without requiring a specific dry-bulb.

The reason it takes so long is that there is a heap of work to do with both the comfort and data overlays. Having gone back through everything with a fine tooth comb, I have a couple of potentially interesting or potentially embarrassing questions that you or someone else may be able to answer.

Why are temperature lines in some charts not vertical? Motor Starters. Fan Monitoring Systems. Gravity Ventilators. Kitchen Ventilation Products.

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