Re: Risposte alle pagine lunari
Inviato da justforfun il 4/5/2008 10:02:23
Sistema refrigerante per tute spaziali
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In Space Shuttle Extravehicular Mobility Units (EMUs), the cooling system consists of a network of small diameter water circulation tubes that are held close to the body by a Spandex® body suit. Heat released by the astronaut's body is transferred to the water where it is carried to a refrigeration unit in the suit's backpack. The water runs across a porous metal plate that is exposed to the vacuum of outer space on the other side. Small amounts of water pass through the pores where it freezes on the outside of the plate. As additional heated water runs across the plate, the heat is absorbed by the aluminum and is conducted to the exposed side. There the ice begins to sublimate, or turn directly into water vapor, and disperses in space. Sublimation is a cooling process. Additional water passes through the pores and freezes as before. Consequently, the water flowing across the plate has been cooled again and is used to recirculate through the suit to absorb more heat.
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http://nasaexplores.com/show_912_student_st.php?id=030107101821
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In Space Shuttle Extravehicular Mobility Units (EMUs), the cooling system consists of a network of small diameter water circulation tubes that are held close to the body by a Spandex® body suit. Heat released by the astronaut's body is transferred to the water where it is carried to a refrigeration unit in the suit's backpack. The water runs across a porous metal plate that is exposed to the vacuum of outer space on the other side. Small amounts of water pass through the pores where it freezes on the outside of the plate. As additional heated water runs across the plate, the heat is absorbed by the aluminum and is conducted to the exposed side. There the ice begins to sublimate, or turn directly into water vapor, and disperses in space. Sublimation is a cooling process. Additional water passes through the pores and freezes as before. Consequently, the water flowing across the plate has been cooled again and is used to recirculate through the suit to absorb more heat.
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http://nasaexplores.com/show_912_student_st.php?id=030107101821
Messaggio orinale: https://old.luogocomune.net/site/newbb/viewtopic.php?forum=13&topic_id=4284&post_id=117800