Jonathan T Wojack wrote: > > > The heat is from the sun. All orbiting satellites must have > > radiators > > and a cooling system to shed this excess heat. This is at least very "imprecise" statement. The spacecraft's radiators are used to dissipate internal thermal energy generated by electrical devices onboard and other systems generating waste heat (eg. fuel cells). External thermal input from Sun might be supressed by external thermal insulation (eg. gold-plated polyester film) and/or reradiated into space in slow rotation mode (AKA "barbecue mode"). The surface temperature rises on the lit side of spacecraft due to solar radiative warming and it drops on the shadowed side due to irradiance in cold space. > > Did the Apollo spacecraft have radiators, too, or did they 'only' rotate > the spacecraft to spread out the heat intensity over most of the hull > surface? > Yes, the radiators were located on cylindrical sides of Service Module (SM). Cooling of Command Module systems during launch and after SM separation was done by water evaporator (I must check in my archive wheter there was also ammonia boiler used durin early stages of flight and after parachute deployment, ie. in denser parts of atmosphere, where the efficiency of water boiler is rather low). > ------------------------------ > Jonathan T. Wojack tlj18@juno.com > 39.706d N 75.683d W > > 4 hours behind UT (-4) > > ________________________________________________________________ > GET INTERNET ACCESS FROM JUNO! > Juno offers FREE or PREMIUM Internet access for less! > Join Juno today! For your FREE software, visit: > http://dl.www.juno.com/get/tagj. > > ----------------------------------------------------------------- > Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' > in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org > http://www2.satellite.eu.org/seesat/seesatindex.html -- Mgr. Antonin Vitek, CSc. Office: Main Library, Academy of Sciences of the Czech Republic Narodni 3, CZ-11522 Praha 1 - Phone: +420(2)21403255, fax +420(2)24240611 Home: Kytin 127, CZ-25210 Mnisek p. B., Czech Republic Phone: +420(305)592865 - Coord.: 14.2194 deg E, 49.8488 deg N, 442 m ASL My satellite home page: http://www.lib.cas.cz/www/space.40/index.html ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www2.satellite.eu.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Thu Jun 07 2001 - 00:16:12 PDT