CoolSim 5.4 changelog

In CoolSim 5.4.180, File → Import → Rack Heat Loads (CSV) never changed the job: a rack row’s load went to a field the solver does not read. On a row set rack by rack, 0 kW became 1,000 W and a blank became −1,000 W, which the solver treats as a heat sink, and each rack’s airflow stayed sized for its old load.

The preview sets every rack in a row you name, recomputes each rack’s airflow from its expected temperature rise as the rack editor does, and ends with a list of every line it left alone and why. Results change for any model whose heat loads came from this import.

• The menu bar is File, Edit, View, Simulation, Help.
• File → Open Recent lists your last projects. The 5.4.180 list lost its oldest entry each time it was read.
• Edit has Copy, Paste, Duplicate, Delete, Group and Ungroup. Anything you can’t use at that moment is greyed out.
• View and Simulation hold the Design toolbar’s tools. Post Processing Parameters is now Simulation → Plot Setup.
• Ctrl+O opens a project; in 5.4.180 it did nothing. Ctrl+N starts a new one.
• Right-click Hide, Nearly Hide and Show list the object types directly, without the By Type step.

In 5.4.180, Sensor Connections opened only in beta mode, so VFD settings sent you to a window you might not be able to open. It is now under Simulation → Sensor Connections and on a cooling unit’s right-click menu for everyone.

It lists the cooling units with a line each saying what it follows, such as “VFD · 2 pressure sensors”, and you tick the sensors the picked one reads. Ctrl-click picks several to paste sensors or VFD settings into at once. VFD Settings says which sensors the fan follows and which reading it holds, and checks the set point and airflow as you type.

• CRAC Parameter Variation has a tab for the baseline and one for each variation, each a table with a row per cooling unit.
• Plot Setup has one Customize result plots switch; with it off, a note says which standard plots you get.
• Energy Calculation asks whether you use measured power or estimate from a COP, and shows only that method’s fields. Other heat load is now Other power in the room, which is how the report uses it.

View → Power View colors each rack by its heat load in watts: its own, or the total of its servers, including any share to liquid. A key in the corner of the 3D view counts the racks in each band and keeps up as you edit loads; Edit range… on the key sets your own range. In 5.4.180 the color came from the watts per cubic meter of one server in each rack.

Turning Power View on and off, or saving while it is on, leaves the model as it was. In 5.4.180, turning it off made see-through objects solid, and saving while it was on stored the faded objects at 20% opacity, so the model reopened faded.

Two faults in CoolSim 5.4.180 could leave a .csp that CoolSim could no longer open:

• Sending a job again for a model you had already sent, and answering No to Save as new model?, could write the model over its .csp as plain text instead of a package.
• A save that failed part-way, for example on a full disk or a dropped network share, had already deleted the old .csp.

The preview always writes a real package and replaces the old file only once the new one is complete. If a save fails, your last saved copy stays where it was and the model stays marked as unsaved.

The object library runs on Firebird 5 in place of Firebird 2.5, which has had no updates since 2019.

• The first start after installing takes about 10 seconds.
• Library pages show every column. Columns with names longer than 27 characters were missing.
• Adding parts works on Windows set to use a decimal comma.
• The preview keeps its own index of library parts. It picks up parts added, changed or removed in your current CoolSim the next time it starts, which takes about half a minute. Your current CoolSim does not see parts added or removed in the preview.

• Undoing a group move puts every member of the group back.
• Undo works after Redo.
• A new edit clears the Redo history, so Redo can no longer replay an old change on top of new work.
• Undo keeps recording after you cancel a Save or Open.
• Undo with nothing left to undo no longer shows an error.
• Changes made in an object’s properties dialog can be undone.
• Undo and Redo from the menu now update the 3D view.