Estimation of heat fluxes and temperature in a 1U cubesat using mathematical models

In this work, temperature and heat fluxes that affect KillaSat, the first 1U cubesat developed by the Peruvian Space Agency, are studied. To do so, node-reduced models are considered, assuming that heat transfer happens immediately. It is calculated the heat flux that is provided by each of the external sources, directly from the sun, IR radiation emitted by the earth, and albedo, on a single-node model. Then a three-node model is considered to study the heat flux between internal components, assuming that two internal faces that face each other have the same material, dimension, and temperature. Finally, the variation of temperature in the time is studied, considering different initial conditions.