Advanced Stirling Radioisotope Generator (ASRG). Thermal Power Model in MATLAB®. NASA/TM— August jsp. The Advanced Stirling Radioisotope Generator. Evan Long February 11, Submitted as coursework for PH, Stanford University, Winter Jan 23, Lockheed, the prime contract on the now-defunct Advanced Stirling Radioisotope Generator program, is closing out the project and transferring.

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The two finished units had these expected specifications: This is the latest consequence of the White House’s war against planetary exploration in the United States. Archived from the original on Sign in to get notified via email when new comments are made.

NASA Just Cancelled its Advanced Spacecraft Power Program

Unfortunately, it goes down with the square of the distance from the sun. One potential technology gap is the waste heat rejection approach for higher power Stirling convertors. The simplest thing could be a brush on a robotic arm. ASRGs can be installed on a wide variety of vehicles, from orbiters, landers and rovers to balloons and planetary boats. Maybe a brush that rotates around the center like a windscreen wiper?

I don’t want my son to grow up parched by the lack of adventures to the cosmos! My guess is because going there is expensive, they have no connection with human space flight and they get in the way of more Mars missions.

And while billions are piled up on new Mars missions, let’s cuts the crumbs from Cassini too, so that it can’t even finish properly. Two parabolic flight campaigns and one suborbital flight test provided essential data in multiple gravity environments to evaluate the thermal performance of the RCHS. At the very least, approve one rover, not too, leave a bit for something else. NASA also needed more funding for continued plutonium production which will be used in existing MMRTGs for long-range probes in the meantime and decided to use the savings from the ASRG cancellation to do so rather than take funding from science missions.

Given that some PU is going to be produced then a mission beyond Saturn is still feasible. The basics of harvesting energy from a stigling gradient rqdioisotope well understood; they are used routinely on Earth in geothermal power or thermal plants stieling by coal, natural gas, or nuclear power.


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Gneerator seen same design with circular solar panels. It is used in refrigerators, in industrial boilers and even on the international space station Archived PDF from the original on 24 October Who takes the hit?

Energy source efficiency is very important. Stocks came from now-depleted Cold War-era reserves and from Russian sources.

We have given direction to the Department of Energy, which manages the flight procurement, to end work on the flight units.

I have no information on this, but solar panels are so exposed compared to a computer partially shielded by a box inside that I wonder how much they would be degraded in high radiation.

Also,it would be interesting to know how well solar cell resist to high radiation environment close to, say, Europa. I believe that ESA would have chosen the much more interesting Europa if it wasn’t for the high radiation. Published 30 March The critical difference between the ASRC and prior generations of radioisotope thermoelectric stiling is that it uses an oscillating piston to manage heat flow to and from the hot and a cold reservoirs.

There’s a classified small amount in store right?

Advanced Stirling radioisotope generator – Wikipedia

The hazards of launch obviate a number of other potential solutions that are too vulnerable to the G-forces or vibration loads incurred while reaching orbit. That new burden, combined with sequestration and the relentless desire to cut the planetary exploration by this White House, likely left NASA with little choice but to cancel this program.

In numerous cases, particularly for missions whose flight profiles require continuous operation for long periods in deep space, space programs have turned to the radioisotope thermoelectric generator. The energy conversion process used by an ASRG is about four times more efficient than in previous radioisotope systems to produce a similar amount of power, and allows it to use about one quarter of the plutonium as other similar generators.


I just hope the savings are enough that they don’t have to kill any of the ongoing missions. On Saturn, changing seasons can mean changes in the haziness—and color—of the skies. This solar cell technology could be used to power high-power spacecraft and unmanned aerial vehicles. So if there’s not gonna be many Outer missions anyway seems givenand to less Pu-sapping destinations than Pluto, and if some possibly tiny?

Another possibility was the Mars Geyser Hopper.

Radial core heat spreader to improve Stirling radioisotope generator heat rejection

Not only is weight at a premium, given the energy requirements for boosting mass into orbit, but minimizing the amount of radioactive material necessary for a given stirlint output reduces costs and decreases the hazards that would result from a catastrophic launch failure.

Opportunity has been using solar for nearly 10 years.

However, the ASRC represents the first application of the technology to space. In any case, Opportunity has worked for nearly 10 years without intentional cleaning and ESA ExoMars will use solar panels. The purpose of this experiment was to determine if the RCHS could function during all mission phases. When many components are combined into a single semiconductor chip, heating can become a real problem.

The RCHS is a hollow, dimpled titanium disc that uses boiling and condensing water to transfer heat radially from the center where the Stirling convertor would be located, to the outer diameter where the generator housing would attach. The hardware procured under this activity will be transferred to the Glenn Research Center to continue development and testing of the Stirling technology. Ultimately the question is do we want a balanced exploration program or just a Mars program.

Which means no outer planets mission well after Like the Carnot cycle, it consists of four steps that result in delivery of net work.