摘要:
There is provided a heat pipe assembly 10 formed of dissimilar materials for the heat pipe 18 integrated with the host structure 16 in a manner that optimizes removal of unwanted heat generated by various devices on a space or terrestrial platform 14 . A conventional heat pipe construction 18 mounted within a circular cross-section channel 28 formed in a retaining block 26 leaving an annular gap 30 between the outside surface wall 33 of the heat pipe and the inside surface wall 32 of the channel 28 . A heat conductive fluid 40 is injected into the annular gap 30 permitting the dissimilar CTE materials to thermally expand and contract as the platform or structure 14 experiences extreme temperature changes.
摘要:
A spacecraft equipment panel (20) including heat pipes (HP1, HP2, HP3) operable in a zero-gravity environment for cooling the equipment (E1, E2, E3) mounted to the panel is not operable in an Earth-gravity environment because the two-phase working fluid in the heat pipes (HP1, HP2, HP3) tends to pool at the bottom of the heat pipe when the heat pipe is vertical. An apparatus and method for overcoming this condition employs infrared lamps (IR1, IR2, IR3) positioned on a mounting frame (120) to heat the bottoms of the heat pipes (HP1, HP2, HP3) to vaporize the working fluid therein, whereby the heat pipes (HP1, HP2, HP3) become operable for transporting heat while in a vertical orientation and under the influence of gravity.
摘要:
Described herein is a heater for space equipment that includes a heat pipe. The heater also includes a first layer applied to the heat pipe. The first layer may be made from an electrically non-conductive material. The heater additionally includes a resistance heater printed onto the first layer after the first layer is applied to the heat pipe. The heater includes a second layer adjacent the resistance heater. The resistance heater may be positioned between the first layer and the second layer, and the second layer may be made from an electrically non-conductive material.
摘要:
A solar rejection system includes an enclosure for housing a sensor, and a movable sunshade. The housing has an opening or aperture for admitting light to the sensor, and the sunshade is moved as needed to prevent harmful solar illumination of the sensor. The sunshade may be a flat panel. The sunshade panel is mounted to a hinge that is located on one side of a large diameter bearing that allows the shade to be rotated around the aperture of the sensor to always prevent the sun from illuminating the aperture. The hinge allows the shade to be tilted to either allow the sensor to see further off axis without obscuration or to block the sun when it moves in front of the sensor. Full closure of the sunshade on its hinge allows it to also function as an aperture door, blocking the opening or aperture.
摘要:
Eine Geräteträgertafel eines Satelliten mit zumindest einem Elektronikkasten (3), der elektrische und/oder elektronische Baugruppen aufnimmt, zeichnet sich dadurch aus, dass die Geräteträgertafel (1) eine Grundplatte (10; 11) aufweist, auf der der zumindest eine Elektronikkasten (3) anbringbar ist, und dass die Grundplatte (10; 11) zumindest bereichsweise mittels integrierter Wärmequellen und/oder Wärmesenken temperierbar ausgebildet ist.
摘要:
The invention relates to a telecommunications satellite (10), of the type which is stabilized on three axes, said satellite comprising a set of dissipative equipment, constituting the payload of the satellite, said satellite being of substantially parallelepipedal shape, the panels of which forming two opposite faces, termed East (16) and West (17), support data transmission antennas (19), and the panels forming two other opposite faces, termed North (14) and South (15), comprise on their external face radiator surfaces intended for cooling the electronic equipment of the satellite. The equipment installed on the North (14) and South (15) panels dissipate thermal power corresponding to less than 25% of the total power dissipated.