When the space station is on the sunshine side  its  having + 200 Fahrenheit  temperature environment (+ 93.3 Celcius) . When it is in the  shadow of the earth, on the night side, its environemnet is  – 200 Fahrenheit , that means – 128.9 Celcius   degrees.  Thats one reason  why  the system, stabilizing  temperature of the module   is important.

The Changis in Kelvin is from   95,2 K to 366 K  (Change is  about 272 degrees in  Kelvin scale)

The Changes  in Celcius from -177.8 C to 93.3 C. Change is  about 272 degrees  in  Celcius  scale)

The Degrees in fahrenheit  from – 200 F to + 200 F ( Change is   400 F degrees in Fahrenheit scale)

Space Station orbit  is 92 minutes at the altitude of   260  miles 8 That is  418 km).

Orbital Sciences’ Cygnus spacecraft, atop its Antares rocket, now will launch no earlier than mid-January.

  • The postponement of the Antares launch will allow ample time for the station crew to focus on repairing a faulty pump module that stopped working properly on Dec. 11.
  • NASA currently plans for two Expedition 38 astronauts to venture outside the space station Dec. 21, 23 and 25. NASA astronauts Rick
  • Mastracchio and Mike Hopkins will remove a pump module that has a failed valve.
  • They will replace it with an existing spare that is stored on an external stowage platform. The pump is associated with one of the station’s two external cooling loops, which circulate ammonia outside the station to keep both internal and external equipment cool.
  • Each of the three spacewalks will begin at 7:10 a.m. and is scheduled to last six and a half hours. NASA TV coverage will begin at 6:15 a.m.

(Inside crew modules, the active thermal control system uses water for heating and cooling. Air passes heat to the internal system in the air conditioner, which also collects water from the air’s humidity for system reuse.

The 2010 a pump failure in Loop A involved replacement of the pump during three spacewalks that August.

“That was a failure to be able to move the ammonia,” said Kenny Todd, ISS Mission Operations Integration Manager.)

  • “Here we have a failure in controlling the temperature of the ammonia.  The valve is basically a mixing valve, which helps regulate the temperature of the circulating ammonia. While it’s in the same pump module, it’s in a different area,” Todd said.
  • “Everything we can do is being done,” Todd said. “The system is good and stable. The crew is in good shape. All the right folks on the ground are looking at the problem and trying to assess exactly what the root cause is and what our options are to continue moving forward.”
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