Abstract: Satellites cope with harsh environment when working in the orbit so they require heat management by varios methods such as heat pipes, louvers, pumped fluid loop, etc… to improve stability, durability and longevity. The pumped fluid loop (PFL) is one of the most significant components as it is more efficient than other passive thermal control as it can deal with environmental extremes or to accommodate equipment dissipating high power. Carbon nanotube (CNT) is known as the material that has high thermal conductivity (kCNT = 2000W/mK), so it is possible to use as nano-additive for enhancing thermal conductivity of fluids. In this report, we present some results on simulation of heat dissipation for a satellite using carbon nanotube nanofluids. These results open the potential application of CNTs in nanofluids for heat management in PFL of satellites.