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The MPLM (Mini Pressurized Logistic Module) is one of the Elements constituting the ISSA (International Space Station Alpha). With respect to the other Elements, the MPLM is not permanently attached to the ISSA, but it is transported by the Orbiter several times from/to the Earth, since its primary use is to resupply and return cargos. The MPLM capability to support the logistic flights is guaranteed during several mission phases (ground, Orbiter transportation, on-orbit docked to the Station). Since the installed cargo can be passive or active, the required MPLM functions are based on the actual flight. This paper presents an overview of the activities performed in Alenia Spazio to identify the criticality and peculiarity of the MPLM mission scenarios from the thermal point of view. The best technical solutions, foreseen up to now, have been implemented in the design to guarantee the reliability requested by such an important and unique Space Station Element.

The Automated Transfer Vehicle (ATV) is one of the major European contributions to the International Space Station Alpha (ISSA). The ATV will be launched with ARIANE 5 and will be used for servicing of ISSA with pressurized and unpressurized cargo as well as for ISSA refuelling and reboost. The ATV consists of a Core Module and a Cargo Module. The Core Module includes all major subsystems including the propellant tanks required for the automated flight to ISSA. Eight 400 N thrusters are accommodated on the bottom platform for orbit transfer and reboost of ISSA. Twenty 200 N thrusters, accommodated on the cylindrical shell of the core module, are provided for attitude control. The thermal control of the ATV consists of a passive subsystem supported by an electrical heater system. The waste heat of most of the avionics equipment is collected and transferred via conduction through the box baseplate to the avionics platform and further on to the cylindrical shell.