Press Release

Cool Power

Breakthroughs in solar panel cooling tech will help keep NASA’s Parker Solar Probe operating at peak performance — even while flying through the sun’s corona

Wed, 06/21/2017 - 11:10

As NASA’s Parker Solar Probe spacecraft begins its first historic encounter with the sun’s corona in late 2018 — flying closer to our star than any other mission in history — a revolutionary cooling system will keep its solar arrays at peak performance, even in extremely hostile conditions.

Every instrument and system on board Parker Solar Probe (with the exception of four antennas and a special particle detector) will be hidden from the sun behind a breakthrough thermal protection system (TPS) — an eight-foot-diameter shield that the spacecraft uses to defend itself against the intense heat and energy of our star.

Every system will be protected, that is, except for the two solar arrays that power the spacecraft. When the spacecraft is closest to the sun, the solar arrays will be receiving 25 times the solar energy they would while orbiting Earth, and the temperature on the TPS will reach more than 2,500°F (1,370°C). The cooling system will keep the arrays at a nominal temperature of 320°F (160°C) or below.

“Our solar arrays are going to operate in an extreme environment that other missions have never operated in before,” said the Johns Hopkins Applied Physics Lab’s Mary Kae Lockwood, spacecraft system engineer for Parker Solar Probe.