If historical past has taught us one factor, it’s that science fiction typically offers technique to science reality. Contemplate the Star Trek communicator and the rise of flip telephones within the late Nineteen Nineties and early 2000s, or how 2001: A Area Odyssey predicted orbiting house stations and reusable house planes – just like the International Space Station (ISS) and the Space Shuttle. And who can neglect Jules Verne’s traditional, From the Earth to the Moon, and the way it anticipated that people would sooner or later stroll on the Moon? Virtually a century later, this dream could be realized with the Apollo Program.
The most recent comes from Cornell College, the place a staff of researchers has developed a novel in-suit urine collection and filtration system impressed by the fits the Fremen wore in Frank Herbert’s Dune. As soon as built-in into NASA’s customary spacesuit—the Extravehicular Mobility Unit (EMU)—this technique has the potential to offer astronauts with further water whereas lowering the chance of hygiene-related medical occasions. Briefly, the stillsuit expertise has the potential to allow longer-duration missions on the floor of the Moon, Mars, and orbit.
The analysis staff was led by scholar researchers Sofia Etlin, Luca Bielski, and Julianna Rose, specialists in house drugs, ornithology, and plant science at Cornell College. They have been joined by a number of colleagues from the Division of Biology and the Weill Cornell Graduate School of Medical Sciences at Cornell College. Their paper that described their system appeared on July eleventh in Frontiers in Space Technologies. As they point out of their examine, astronauts have been conducting extravehicular actions (EVAs) aboard the ISS utilizing the identical spacesuits as their Apollo predecessors.
These fits embrace a disposable diaper, the Maximum Absorbency Garment (MAG), which collects urine and feces throughout EVAs lasting as much as 8 hours. In accordance with a report by the Office of the Chief Health and Medical Officer (OCHMO), astronauts are anticipated to have seven urination and two defecation occasions every day, however the frequency varies throughout spacewalks. Primarily based on the 37 EVAs carried out aboard the ISS between 2021 and 2023, NASA recorded a median spacewalk length of 6 hours and 26 minutes, whereas the longest lasted 8 hours and 56 minutes.
Publicity to waste for prolonged intervals results in hygiene issues that might become urinary tract infections (UTIs) and gastrointestinal misery. As well as, the present EMU comes with a 0.95 liter (0.25 gallon) In-suit Drink Bag (IDB). In accordance with NASA guidelines, this quantity is roughly 25% to 35% of what an astronaut must eat every day – 3.7 liters (1 gallon) for males and a pair of.7 liters (0.71 gallons) for ladies. On condition that missions on the lunar floor and Mars are anticipated to ivolve long-duration EVAs, neither of those methods is adequate for NASA’s Moon to Mars mission structure. As Etlin informed Universe At present by way of electronic mail:
The subsequent-generation spacesuits, often called the Axiom Extravehicular Mobility Unit (AxEMU), have been designed to replicate the just lately up to date Extravehicular Exercise (EVA) hydration guideline of roughly 240 mL (~8 oz) per hour – successfully rising the go well with’s water provide to 2 liters (0.5 gallons). However as Etlin informed Universe At present by way of electronic mail, these designs nonetheless fall brief within the hygiene division. “Within the new technology of spacesuits, that are at the moment being produced by the corporate Axiom Area, the system that offers with urine is being left because it was within the unique fits from the 70s,” she stated.
To deal with this, the staff developed a novel in-suit urine assortment and filtration system that addresses each issues. Not solely will it be sure that astronauts have a reserve provide of water that’s replenished as they conduct long-duration EVAs. It additionally addresses the problem of well being and hygiene by stopping the astronauts from remaining in touch with their urine. As Etlin defined, the inspiration got here from the Fremen stillsuits featured in Frank Herbert’s Dune, which she learn as an undergrad in 2022:
“Within the novel and movie diversifications, the stillsuit is a full-body go well with worn by the Fremen, the individuals of the desert planet Arrakis. It collects all water produced by their physique—primarily sweat and urine—and filters it into ingesting water, serving to them survive on their water-scarce planet. As I dove extra into house, I got here throughout Dr. Chris Mason via his guide, The Subsequent 500 Years, and determined to cold-email him, presenting my stillsuit thought. We had the possibility to satisfy a few months later, and his first thought was: ‘Why not construct this right into a spacesuit for astronauts?’”
Nevertheless, as an alternative of constructing a full-body go well with to accommodate this new system, the staff designed a module targeted particularly on urine assortment and filtration that may match into present spacesuits. In time, a multidisciplinary staff that included Mason, Bielski, and Rose was assembled, and from this, their stillsuit expertise was born! As Elfin defined, the brand new system consists of two components: the Urine Assortment System (UCD) and the Urine Filtration System (UFS):
“The primary a part of our design would substitute the diaper, or MAG, that the astronauts at the moment put on with a garment that sucks urine away from the physique when the astronaut begins to urinate. The important thing operate of that is to keep away from extreme publicity to urine, which causes a few of the hygiene points we define within the paper. Subsequent, the urine goes via a two-stage filtration system that makes use of ahead osmosis coupled with reverse osmosis to provide pure water whereas minimizing power use, which is one other huge concern in spacesuits. This clear water is then brough to the in-suit drink bag to be consumed.”
The urine assortment garment (see above) maintains a diaper-like portion for feces, which Elfin and her colleagues hope to deal with sooner or later. The entire equipment is meant to be positioned in a pouch weighing about 8 kg (17.6 lbs) and measuring 38 x 23 x 23 cm (15 x 9 x 9 inches). This pouch might be mounted on the again of the AxEMU together with the go well with’s transportable life assist system (aka the backpack), which gives air, heating and cooling, meals, and water. The staff emphasizes that the slight enhance in weight and bulk will likely be offset by the elevated consolation and useful resource effectivity supplied by the system.
This technique and its successors might turn out to be a daily characteristic in spacesuits worn by Artemis astronauts as they discover the lunar floor. The power to stay wholesome, hydrated, and comfy for longer intervals will be sure that NASA and its worldwide and business companions can construct the required infrastructure to permit for a “sustained program of lunar exploration and growth.” Mentioned Elfin:
“Spacewalks are going to turn out to be longer, extra frequent, and extra bodily demanding after we return to the Moon and within the a long time following as we try to ascertain a extra everlasting presence there. After trying on the present spacesuit designs, we expect they might be inadequate to maintain the astronauts wholesome and acting at a excessive stage via these rising challenges. The elevated water out there to astronauts would make them extra productive and reduce the dangers of any well being problems throughout the spacewalk itself, whereas the urine assortment part of our system would higher protect their well being and morale in the long run.”
Additional Studying: Frontiers in Space Technology
