CoolSim 5.4 changelog

CoolSim 5.4.180

What changed in CoolSim 5.4.180 since CoolSim 5.4.177. It was never a download of its own: it reached customers inside the previews below, starting with preview 2 on October 2, 2026, and every preview carries these changes.
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Changed

Can make a model solve to a different answer than before.

OK in the Room Editor skipped re-fitting the room

CoolSim 5.4.180 made OK in the Room Editor quicker when the room’s length, width and external-flow setting are unchanged, which matters most in external-flow models, where rebuilding the room took a long time. By mistake, it also skipped the step that fits objects to a changed floor, ceiling or plenum and works out rack, server and PDU airflows again for a changed air density, on every OK. Preview 12 keeps the quicker OK and puts that step back: see The Room Editor re-fits the room on every OK.

New

Rotate a PDU from its editor

The PDU editor has a Rotate button. Each click turns the PDU a quarter turn clockwise, and its supplies and returns turn with it.

Reverse a PDU's airflow from its editor

The PDU editor has a Reverse Flow Direction button. It turns the PDU’s airflow around, so a unit placed facing the wrong way blows the other way without being moved or rebuilt. The reversed direction reaches the solver.

Improved

Negative sizes are refused

A negative length, width or height typed into the editor for a rack row, tile row, block, grille, cable cutout, PDU or velocity inlet or outlet is ignored, and the object keeps the size it had. A negative start point for a cable cutout, or a negative spacing between racks, becomes 0. A room’s length and width must be more than 0.

A baffle’s negative end points also became 0, which kept a baffle placed by its end points from reaching down into a raised floor. Preview 12 fixed that: see Baffles placed by end points reach into a raised floor.

Plug-fan outlets carry their cooling unit's name

The plug-fan outlets of a cooling unit go to the solver named after the unit, in place of a number for its place in the room’s list of cooling units. The job file also has room for up to 10 plug fans on one cooling unit, up from 7.

Previews built on 5.4.180

  1. Preview 12

    11 changes6 changed · 2 new · 3 improved

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  2. Preview 11

    3 changes1 new · 2 improved

  3. Preview 9

    2 changes2 improved

  4. Preview 8

    2 changes2 new

  5. Preview 7

    2 changes2 improved

  6. Preview 6

    15 changes5 changed · 1 removed · 2 new · 7 improved

  7. Preview 5

    25 changes7 changed · 1 removed · 6 new · 11 improved

  8. Preview 4

    7 changes7 improved

  9. Preview 3

    11 changes1 changed · 1 removed · 1 new · 8 improved

  10. Preview 2

    7 changes1 changed · 2 new · 4 improved

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Something working differently?

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