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http://www.space.com/28388-greenhouse-f … ssion.html
Four crewmembers simulating a mission on Mars dealt with a real-life emergency late last month — a greenhouse fire so strong that flames reached at least 10 feet (3 meters) high.
On Dec. 29, the first day of their mission, the crew noticed an unusual power surge in their habitat at the Mars Desert Research Station (MDRS), in the Utah desert near the small town of Hanksville. A few minutes later, somebody spotted smoke coming from the greenhouse.
Crew commander Nick Orenstein, an experienced camper who has built bonfires in the past, ran outside to take a look. He said he figured the group could take on the fire, because the smoke was blowing away from the habitat, and only one shelf inside the greenhouse was aflame. At that time, the fire was about the size of three overstuffed chairs. [Mock Mars Mission Photos: Life on a Simulated Red Planet]
"This is a moment where instinct took over, the instinct of fight or flight, and we had fight," Orenstein told Space.com. "There really wasn't a question at the moment."
It took the crew about half an hour to bring the fire under control. Orenstein and crew engineer Dmitry Smirnov used all available fire extinguishers on site, but even after the extinguishers were exhausted and the power cut, the fire was still not out.
[...]
This is unfortunate but actually probably a good learning experience. Hopefully the MDRS program recovers!
-Josh
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Post about fire in MDRS2.0
The second generation MDRS GreenHab Destroyed by Fire
For five seasons, the facility functioned as an experimental closed loop water recycling system, but testing ceased when it was concluded that the system was too small to maintain the Habitat with six full-time crew members.
http://www.marssociety.org/home/press/a … edirects=0
There is a link in the story to help rebuild the stations greenhouse....
Important notes on water useage in the station is that they typically use only a 3rd of what Nasa indicates that will be needed so we now know what size to target for mars to just do water filtration....
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The story finally hit the media.
An interesting lesson seems to have been learned here...
It took the crew about half an hour to bring the fire under control. Orenstein and crew engineer Dmitry Smirnov used all available fire extinguishers on site, but even after the extinguishers were exhausted and the power cut, the fire was still not out.
"We put out the rest by putting water on the flames," Orenstein recalled.
The four-person crew was barely able to deal with the emergency, he added. "Six or seven [people], to me, seems realistic as the adequate number of people to handle a situation like this most effectively."
It seems to me that this contingency needs to play an important role in mission planning. Firefighting is a major issue on ships at sea, there is no reason to believe spacecraft and surface habs would be any different. If you don't have sufficient manpower to fight the fire, everyone is dead. There is no "jumping overboard".
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While its a problem on earth a fire on mars would mean jumping inot a space suit, getting into the exit chamber and releasing the air in the cabin to the outside or flooding it with CO2....
"The GreenHab as a greenhouse wasn't cost-effective; we had to keep it heated and cooled. The idea is this will be much easier to maintain," Rupert said.
The Fisher GreenHab was the second greenhouse built at MDRS, after the first one collapsed under heavy winds. Built in 2003, the structure was first used for five years as an experimental water recycling system.
The GreenHab was reconfigured in 2009 for use as a greenhouse, after concerns were raised that the water-recycling system would not be able to support crews properly. Crops for crews were grown for three seasons. A "Zen Garden" was also available for crews inside the GreenHab, allowing for a small spot to retreat from the main habitat for privacy.
The Mars Society aims to have a replacement structure ready in time for the 2015-16 field season, which begins this fall.
Good that it will get replaced bad that its going to be more than $40,000 to do so.
Seems that we need a professionally designed struture to do the experiments within and to get the heating and cooling correct at the least amount of energy costs to boot....
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I am sure that after a period of cleanup it will be started up again....
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Do they crowdsource for funds for this kind of stuff at all?
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Welcome to NewMars Dexter2999.
I am not in the know as I am not a member but maybe one that is will reply....
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For SpaceNut (primarily) but all are welcome to comment ....
The top level comments/posts in this topic do not discuss or reveal the cause of the fire in the Mars Society test facility.
I am surprised that a fire of such magnitude was even possible.
Todo item: Find out cause of the fire and report it to the group via post.
Todo item: Reflect on the fire as it relates to RobertDyck's Large Ship or to a habitat on Mars.
(th)
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Fires in space as very simular to how you would go about them on a submarine. While small all hands on deck to extinguish but once thats not going to happen in that first minute as it grows one will evacuate the compartment to be able to close it and fill it with an atmosphere or removal of what is present that would put it out.
Other actions are to cut power to the compartment and fluids that can break down to give the fire more fuel to burn.
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For SpaceNut re #9
Thanks for adding value to this (ancient) topic ....
The ability to contain a fire as you have described depends upon the architect/designer .... and this forum ** has ** one! RobertDyck is hard at work (or rather, ** occasionally ** is hard at work) on design of Large Ship. Unlike the ocean going liner that is his inspiration, he is going to have to follow your lead and design for submarine environment and procedures. RobertDyck has one very significant advantage over a submarine designer! RobertDyck can follow your suggestion and build rapid decompression capability into modules. That is most definitely ** NOT ** an option for submarine designers.
***
Because this topic was started way back when (at the time of the fire in the desert facility) I would invite members with posting privileges to update the topic with news of any changes there were made to prevent such conflagration in the future.
If there is a Mars Society member who has experience in the MDRS facility, please consider Post #2 of Recruiting. At present (to the best of my knowledge) no one currently a member of this forum has experience living in or dealing with the test facility.
(th)
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tahanson43206,
In the Navy we used CO2 (electrical / paper / wood / clothing / dryer lint) or dry chemical (small grease or fuel oil fires like the deep fat fryers; PKP or "Purple K" was like flipping a light switch on grease fires, but not fun to inhale or clean up after; you are instantly persona-non-grata with the electricians and you will get questioned for using it, but it's still worth it when you need it) or water deluge (mainspaces or aircraft, with or without AFFF; they actually asked us why we didn't use AFFF on that stupid deep fat fryer fire instead of PKP, as if we had our own hose team and equipment laid out and on standby while we were preparing the next meal- this was during my first six months aboard my first ship while "mess cranking") to gain control over fires. Main spaces are also equipped with Halon systems, but those are not to be trifled with. You use Halon after you've exhausted other options, because anyone inside who is not wearing full FFE is likely to be killed.
Anyone who thinks an OBA is "light and comfortable to wear" has clearly never spent much time in a 160 degree fireroom as part of a hose team, nor babysitting a backup diesel generator pouring smoke into the ship. By the time I was aboard the nuclear powered aircraft carriers, we had SCBAs. The SCBAs were heavier, definitely more comfortable to wear, and slightly more complicated to use. I can't recall having any of those "thick leather gloves" for removing the canisters mentioned in that Wikipedia article, either. We had thin fire retardant cotton gloves and used a rag held by your partner to "catch the candle" as the canister was released. Sometimes a member of your damage control locker's hose team would use real firefighting gloves to catch them for you. You push the OBA away from your chest so you don't drop the hot canister on your crotch. The OBA canisters were surprisingly good at starting fires on their own, to the point that we never placed them on top of any sort of fabric or flammable substance. We would go to a clear deck area with no diesel or kerosene residue, preferably outside the skin of the ship, and place them on the deck to allow them to cool off, and have someone with a CO2 extinguisher watch over them for about 10 minutes. You'd also better be pretty thin if you want to fit through a hatch while wearing either the OBA or newer SCBA. The OBAs were much better for going through hatches than SCBAs (lean back and run your backside up against the lip of the hatch while you go through).
I'm partial to our trusty CO2 bottles. They're heavy, or at least the kind we used were, but they usually get the job done if you respond quickly and don't typically corrode the hell out of electrical stuff the way that dry chemical does. If you no longer care about whether or not anyone inside a compartment survives, then dog all doors and hatches, use Halon, and call it a day.
If a structure was already weakened by fire, then I would not want to rapidly decompress it, but that's just me. However, venting the atmosphere to space is a perfectly viable way of gaining control over a fire, and the net effect of doing that would be no different to anyone inside than using Halon. The primary issue I take with that approach is accidental decompression through loss of sealing.
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For kbd512 re #12
SearchTerm:Fire suppression aboard ship in oxygen atmosphere
SearchTerm:Halon use of to fight fire aboard ship
Since fires are a constant danger aboard the ISS (or any space craft in LEO or anywhere away from Earth), if anyone with posting privileges would be willing to investigate to see how fire danger and actual events are handled by space travelers, that would be welcome addition to this topic.
A note for kbd512 ...
The Large Ship will have full vacuum suits for all personnel, much as vessels (are supposed to) have life rings for all personnel.
These would be the natural choice for fighting a fire, although rapid action to suppress a fire might be required in space before there is time to don a suit.
A question for kbd512 ...
Since your experience was aboard multiple surface ships and NOT in submarines, the fire suppression methods you described might not necessarily apply to the submarine service, but some of them might.
A question for GW Johnson (who has reported exposure to a submarine in service) ... did you pick up any insights about fire fighting procedures for those?
It is possible that might not have come up in the time available to you aboard ship.
For all ... fire fighting aboard a flying vehicle might be somewhat similar to that activity in a space craft. Can anyone speak to that?
The CO2 cartridge mentioned by kbd512 might well be standard equipment in an aircraft.
(th)
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The trouble with all closed fired locations is that you need a means to get people to a safe haven location while the fires are fought.
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For SpaceNut re #13
This forum is one of the few places on Earth where mass transportation of people to Mars (or anywhere in the Solar
System) is under serious discussion.
I take it as a given that any deep space vessel will have a fully equipped and tested EVA suit for every person on board, just as I would expect to see a life ring on a ferry boat equal to the number of passengers.
However, a fire scenario would call for a different strategy.
Your "safe haven" idea seems reasonable, and well worth considering. however, in a rotating habitat ring, such as those planned by RobertDyck, kbd512 and tahanson43206, it seems to me that the greatest need is for an oxygen mask to be readily available to everyone. The greater risk inside a habitat ring would seem (to me at least) to be contaminated air, since open fires would be prohibited, but electrical fires could and probably ** would ** occur.
Just as in an airliner with drop down oxygen masks, I would expect a passenger carrying deep space vessel to be equipped with emergency breathing equipment short of a full EVA suit.
Thus, your "safe haven" would be an oxygen mask to protect passengers and crew while the noxious fumes are removed.
(th)
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To make the oxygen mask a fixed location means feeding the fire, which is something we would not want but a locker containing a mask attached to a canned air would allow for the individual to get out of an area that is smoke filled.
EVA suits take a period of time to get into them, but a modified set of fire insulated overalls sounds like a quick fix.
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For SpaceNut re #15 and topic ....
We (forum members) do not need to be speculating in an absence of information ....
Space vessels have been in regular service for a number of decades now.
It ** should ** be possible to discover the fire plans that have been put in place, including equipment and training.
We (Americans) got a severe wake-up call with the fire in Apollo 1, and (I understand) there have been non-fatal fire incidents in space since.
Your concern seems to be (as I understand it, subject to correction) that having oxygen masks spaced around the interior of a habitat would be a risk, but I offer the suggestion that unbreathable air would be far more likely than an open fire.
Every passenger, and certainly every crew person, would be trained to avoid activities that could cause an open flame.
Surely the many years of ISS occupation, MIR occupation before that, and the Chinese experience now would provide useful guidance for a space habitat designer.
You have helped the discussion along with some interesting ideas.
Let's see if anyone else has a contribution.
(th)
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Air fuels fire so giving fire more available air works against you as air removal will need to happen. If you must dawn a mask and its length of hose limits movement then you are not going to make it. Having a non tethered mask with small amount of canned air allows you to wear it and move away from it.
Having something like this for the personnel to escape with might be a bit large for tank size but not for the fire fighting team.
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For SpaceNut re #17 and topic in general
Thanks for the interesting find.
Your point about NOT wanting the oxygen equipment to be tethered is a good one.
Each resident in a rotating habitat is going to want (and need) to be able to find and don emergency air equipment within seconds of an alarm going off.
It seems to me a submarine is a possible model for the kind of environment space travelers will have ...
Fire would be a worry for folks inside a submarine, so whatever procedures have been put in place ought to be informative.
Can you fill in details about what you are thinking might burn?
It certainly is possible that carbon containing materials would be desired and deployed aboard ship, whether on Earth or in space.
Are there best practices for the ISS and other stations, to address the risks?
It seems to me unlikely that the experience of a home dweller on Earth is a good guide for living in space, or in habitats on Mars.
(th)
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Following up on the question of fire prevention and management in space, I asked Google, and (of course) it found a NASA document
Rather than print something from the document, I'll just note that it reports that the only significant fire in space occurred on a Russian vessel, where an oxygen generator caught fire, and since the device produced oxygen, the only recourse was to let it burn out.
The opening page of the NASA article mentions materials being studied for fire susceptibility before being carried to space.
However, that same page ** does ** refer to use of fire extinguishers.
The air inside a small volume space vehicle would load up pretty quickly with noxious fumes.
I am hoping that the article mentions breathing equipment beyond the first page.
Update a bit later:
The page at the link above is dated: 04.01.04
The link at the bottom of the page, offering the "full article" does not work.
Hopefully there is more recent documentation about fire prevention and management in space.
(th)
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The article mentioned in post #19 is about fire in space with microgravity.
The situation in a rotating habitat would be different for a variety of reasons, but mechanical circulation of air is going to be a factor in any space habitat.
The NASA article mentions turning off the air circulation systems.
(th)
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https://www.sciencedaily.com/releases/2 … 141606.htm
This article is about using a vacuum to suck up a fire ...
Science Newsfrom research organizations
New concept for novel fire extinguisher in space
Vacuum Extinguish Method (VEM): A fire extinguisher in space environments
Date:
April 18, 2019
Source:
Toyohashi University of Technology
Summary:
Researchers have developed a new concept of fire extinguishing, named Vacuum Extinguish Method. VEM is based on the 'reverse' operation of the conventional fire extinguishing procedure: It sucks the combustion products, even flame and the firing source itself, into a vacuum chamber to clean up the firing zone. This concept is advantageous for space use, as it prevents the spread of harmful combustible products throughout the enclosed cabin.
Share:
FULL STORY
A research team in the Department of Mechanical Engineering at Toyohashi University of Technology has developed new concept of fire extinguisher optimized for space-use, named Vacuum Extinguish Method (VEM).
(th)
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As we have seen from a fire that was set on a submarine MIAMI suffered a major fire while dry-docked at the Portsmouth Naval Shipyard, Kittery, Maine. The drydock was allowed to fill with water and it still burned internally for days.
Water will break down in the heat and becomes its own fuel. It burns even fire retardant materials once it's hot enough.
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Water will break down in the heat and becomes its own fuel. It burns even fire retardant materials once it's hot enough.
Water breaks down to hydrogen and oxygen. Hydrogen and oxygen burn to form water. This is a closed loop cycle. Each time it changes to/from water, there is energy loss. This cannot sustain fire. There must be some other fuel to act as an energy source to keep the fire going.
Wikipedia: Thermal decomposition of water
In thermolysis, water molecules split into their atomic components hydrogen and oxygen. For example, at 2200 °C about three percent of all H2O are dissociated into various combinations of hydrogen and oxygen atoms, mostly H, H2, O, O2, and OH. Other reaction products like H2O2 or HO2 remain minor. At the very high temperature of 3000 °C more than half of the water molecules are decomposed, but at ambient temperatures only one molecule in 100 trillion dissociates by the effect of heat. The high temperatures and material constraints have limited the applications of this approach.
Was the fire in the submarine hot enough to do this?
Last edited by RobertDyck (2022-08-28 10:26:30)
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For SpaceNut re submarine fire ....
As a point of clarification... if the drydock was filled with water, that does not mean the submarine was filled with water.
Do you have access to any data on why was burning, and (in particular) why the fire persisted?
Was Oxygen allowed to enter the submarine?
Was there a supply of Oxygen inside the submarine that fed the fire?
If water was NOT let into the submarine (as contrasted with the drydock) why not?
Thanks for this tantalizing but mysterious report!
(th)
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I believe this was a crazy Navy employee personnel painter a guy who was nuts and who wanted to go home early and started burning rags and causing an event that would get him sent home early, the rags might have started other fires for example the chemical oxygen generator, one initial fire can make a type of fire that generates its own oxygen. Chemical fires controlled are useful for air, they are dangerous fires we discussed these types of fires in one of the 'Mars Air' threads it kind of goes against your instincts because these fires make more air than they consume but can be used in a controlled method to chemically liberate oxygen as they burn and make more oxygen. I believe he went to jail and was ordered to pay the Navy 10 million.
'Oxygen Candles: Providing Emergency Air'
https://minearc.com/oxygen-candles-prov … gency-air/
Vika TGK oxygen generator discussion
https://newmars.com/forums/viewtopic.php?id=261
Last edited by Mars_B4_Moon (2022-08-28 11:46:15)
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