ESATAN-TMS, Systema, Thermica, Thermisol" />

Worst-case selection using real Earth albedo and temperature data

Determination of the extreme thermal cases for an orbit with known altitude and start date.
The conventional approach uses a set of values (S0,alb,OLR) for the Summer and Winter solstice. The developed method uses SYSTEMA/Thermica's parametric modelling capabilities and an Earth map of albedo and temperature values.

The conventional approach returns an overdimensioned (>10%) set of operating constraints. The method outlined reduces both the radiator area and the required heater power.
Variable Earth albedo and OLR

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Junction-Case-Board temperature mapping

Temperature mapping on electronics board and components' cases and junctions/chips. An accurate simulation taking into account the case-to-board and junction-to-case thermal resistances.
Note how the chip temperature may differ substantially from the component's case temperature. Performed in ESATAN-TMS.
Junction vs Case temperature

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Modelling of electronics boxes in vacuum

Design and simulation of electronic boxes, boards and components with varying complexity. The examples are from ESATAN-TMS.
Space conditions - without convection-aided cooling - require a well-thought thermal design for the electronics. Simple E-box model E-box model E-box model visualization

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Liquid cooling

Short animation of two GSE (ground support equipment) mounting plates cooled by one liquid loop in a vacuum chamber. The simulation takes the liquid properties and mass flow into account.
Liquid cooled plate

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Solar panel model with temperature-dependent cell efficiency

Thermal model of a solar panel with temperature-dependent cell efficiency.
The implementation is in SYSTEMA/Thermisol language, with an assumed 0.30 [%/degC] cell degradation, and an efficiency of 29.5% at max. power, 28 [degC], AM0.
For a temperature excursion of 120 [K], it results in a 36 [%] efficiency variation.

Click image to play animation

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Launch profile Falcon 9

Trajectory simulation of a Falcon 9 launching from Vandenberg's SLC-4E launch pad into a Sun-synchronous orbit. The example shows the trajectory only; additional code in the TMM allows an accurate calculation of the environmental fluxes.

Click image to play animation

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