据SpaceDaily网2019年8月18日报道,NASA的“机器人加油任务3” (RRM3)计划完成了一组初始设备操作任务,将用来自其他世界的水冻冰或甲烷作为航天器燃料的设想进一步变为现实。这种储存和转移冷冻剂(超冷氢氧和甲烷)能力将有助于航天器向太阳系及更远的宇宙空间飞行。在空间站的“ 德克斯特 ”( Dextre )机器人操作下,“多功能设备2”松开致冷剂耦合器适配器并插入致冷剂耦合器端口,成功实现太空中液态甲烷从一个罐自动转移到另一个罐的机器人操作。

Robotic tool operations bring in-space refueling closer to reality
by Staff Writers
Greenbelt MD (SPX) Aug 19, 2019

NASA’s Robotic Refueling Mission 3 (RRM3) completed an initial set of tool operations, bringing the idea of using water ice or methane from other worlds as fuel for spacecraft one step closer to reality.

The ability to store and transfer cryogens (super-cold hydrogen, oxygen and methane) will help spacecraft journey father into our solar system and beyond.

The successful operations demonstrated the first of three tools designed by the Satellite Servicing Projects Division to robotically transfer liquid methane from one tank to another in space.

Operated by space station’s Dextre robot, the Multi-function Tool 2 unstowed the cryogen coupler adapter and inserted it into the cryogen coupler adapter port.

This operation would make it possible to then transfer cryogenic fuel using the remaining RRM3 tools. Additional RRM3 tool operations will be carried out later this year.

RRM3 launched to the International Space Station in December 2018. While the mission is no longer capable of transferring liquid methane due to a hardware issue in April, it has achieved several objectives.

RRM3 demonstrated the longest storage of a cryogen without loss due to a process called boil off. Boil off is a loss of fluid that occurs when the cryogen is not maintained at a low enough temperature.

Special coolers within RRM3 kept the liquid cold for four months.