Capillary Pumped Diphasic Fluid Loop Passive Thermal Control Device with Thermal Capacitor

A closed circuit fluid coolant circulation thermal control device, capable of transferring heat from at least one so-called hot source to at least one so-called cold source, and comprising at least one capillary pumped diphasic fluid loop, which comprises an evaporator, intended to be placed in heat exchange relationship with said at least one hot source and supplied, through a microporous mass, connected to a liquid state diphasic fluid reserve, with liquid diphasic fluid intended to be vaporized in the said evaporator, connected by a vapour pipe to a condenser, intended to be placed in heat exchange relationship with said at least one cold source, to which heat is transmitted by the condensation in said condenser of vapour phase fluid into liquid phase fluid, which is returned to said evaporator by a liquid pipe connecting said condenser to said evaporator, wherein the device also comprises at least one thermal capacitor, in permanent heat exchange relationship with liquid phase fluid in said at least one diphasic fluid loop.