這將刪除頁面 "How is Carbon Dioxide Eliminated Aboard A Spacecraft?"。請三思而後行。
We produce carbon dioxide in our bodies when our cells break down meals and we release it once we exhale. In the atmosphere, carbon dioxide concentrations are approximately 0.04 percent. However, within the confined cabins of spacecraft, like the house shuttle or area stations, the carbon dioxide focus can get much greater, which poses an issue because carbon dioxide is toxic. On Earth, BloodVitals SPO2 plants remove carbon dioxide by the technique of photosynthesis. The plants take in carbon dioxide and launch oxygen. However, BloodVitals tracker in a spacecraft, carbon dioxide have to be removed from the cabin air by way of chemical processes. Most spacecraft rely solely on eradicating the carbon dioxide with canisters that contain powdered lithium hydroxide. When air containing carbon dioxide (CO2) will get handed by means of the canister, it combines with the lithium hydroxide (LiOH) to type lithium carbonate (Li2CO3) and water (H2O). Perhaps, probably the most well-known instance of using lithium hydroxide canisters occurred on the Apollo thirteen mission. After an explosion crippled the command module, the astronauts lived in the lunar module while the spacecraft returned to Earth.
The lunar module used spherical lithium hydroxide canisters, whereas the command module used square ones. With three astronauts respiration the air in an area designed for under two, BloodVitals SPO2 the lunar module canisters have been shortly used up, but the astronauts could not trade them readily because of the totally different shapes. So, engineers at Mission Control had to plan a option to adapt the air stream from the lunar module through the sq. lithium hydroxide canisters. They have been in a position to rig a system utilizing hoses, socks, BloodVitals SPO2 plastic luggage and duct tape -- saving the astronauts from carbon dioxide-induced death. Lithium hydroxide canisters aren't the one resolution -- keep studying to learn the way SCUBA equipment works in area. The International Space Station (ISS) uses lithium hydroxide canisters however it additionally has a newer know-how that makes use of molecular sieves to absorb carbon dioxide. SCUBA re-breathers and private oxygen models utilized by firefighters and miners must also take away carbon dioxide. Some rebreathers use lithium hydroxide canisters.
But others use a response involving potassium superoxide (KO2). So, you possibly can inform when it is accomplished because it stops heating up. This system has the added advantage of supplying oxygen as well as removing carbon dioxide. The U.S. Destiny lab portion and Node 3 portion of the ISS include a carbon dioxide removing meeting (CDRA). The CDRA uses molecular sieve expertise to remove carbon dioxide. The molecular sieves are zeolites, crystals of silicon dioxide and aluminum dioxide. The crystals arrange themselves to type tiny screens. The openings of the screens or pores are constant sizes that allow some molecules to enter and BloodVitals SPO2 get trapped in the sieves. Within the CDRA, there are four beds of two completely different zeolites. Zeolite 13x absorbs water, while zeolite 5A absorbs carbon dioxide. Each aspect of the CDRA contains a zeolite 13X linked to a zeolite 5A mattress. Because the air passes via the zeolite 13X bed, water gets trapped and BloodVitals SPO2 removed from the air.
The dried air goes into the zeolite 5A mattress where carbon dioxide gets trapped and eliminated. The outgoing air is then dry and free from carbon dioxide. Unlike lithium hydroxide canisters, which get used up and BloodVitals SPO2 discarded, the zeolites within the CDRA could be regenerated. Electrical heating elements within the beds heat up the zeolites and BloodVitals health free the trapped water vapor and carbon dioxide. The carbon dioxide gets vented into outer area, whereas the water vapor will get condensed and recycled. The CDRA is designed with impartial controls in order that one half is actively eradicating carbon dioxide and water from the air, BloodVitals SPO2 whereas the opposite half is regenerating. The 2 halves alternate. The CDRA is the first methodology by which carbon dioxide gets faraway from the ISS cabin air, BloodVitals SPO2 while lithium hydroxide canisters are used as backups. In October of 2010, a new system, referred to as the Sabatier, was installed on the ISS. It takes carbon dioxide (CO2) that is eliminated by the CDRA, combines it with the hydrogen gas (H2) generated by the Russian Elektron and U.S. Environmental Control and Life Support System (ECLSS) water electrolysis techniques, and forms liquid water (H2O) and methane gasoline (CH4). The methane will get vented into outer house. In the future, BloodVitals SPO2 NASA scientists hope to create oxygen and remove carbon dioxide aboard spacecraft and space colonies naturally by rising plants. The plants wouldn't solely supply breathable air, but also meals for the astronauts. For extra space-related data, see the hyperlinks on the following web page.
這將刪除頁面 "How is Carbon Dioxide Eliminated Aboard A Spacecraft?"。請三思而後行。