<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:14pt"><div id="yiv1952321863"><div style="color: rgb(0, 0, 0); font-family: times new roman, new york, times, serif; font-size: 14pt; background-color: rgb(255, 255, 255);"><div><span id="yiv1952321863yui_3_2_0_16_131675511048757"><font id="yiv1952321863yui_3_2_0_16_131675511048776" size="2" face="Arial"><font id="yiv1952321863yui_3_2_0_16_1316755110487100" face="Times New Roman">Keith Henson wrote:<br id="yiv1952321863yui_3_2_0_16_1316755110487129"> </font></font></span></div><div><span><font size="2" face="Arial"><font id="yiv1952321863yui_3_2_0_16_131675511048797" face="Times New Roman">> Dennis, there is a vast literature on the subjects you have been<br>> talking about, much of it where people actually worked the numbers.<br> </font></font></span></div><div
id="yiv1952321863yui_3_2_0_16_1316755110487122"><span><font size="2" face="Arial"><font id="yiv1952321863yui_3_2_0_16_1316755110487116" face="Times New Roman">> Re cooling, there is rule of thumb number anyone can calculate on the<br>> radiator area you need per kW of waste heat at room temperature.
I<br>> suggest you might want to look up the formula and calculate it.<br> </font></font></span></div><div id="yiv1952321863yui_3_2_0_16_1316755110487120"><span><font id="yiv1952321863yui_3_2_0_16_1316755110487124" size="2" face="Arial"><font face="Times New Roman">> There is a subtle problem with scaling down heaters like induction<br>> furnaces and scaling up radiators.</font></font></span></div><font id="yiv1952321863yui_3_2_0_16_1316755110487124" size="2" face="Arial"></font><div><span><font id="yiv1952321863yui_3_2_0_16_131675511048784" size="2" face="Arial"></font></span> </div><div><span><font id="yiv1952321863yui_3_2_0_16_131675511048788" size="2" face="Arial">Samantha Atkins wrote:</font></span></div><div id="yiv1952321863yui_3_2_0_16_131675511048778"><span id="yiv1952321863yui_3_2_0_16_131675511048765"></span> </div><div><span id="yiv1952321863yui_3_2_0_16_131675511048768">"This is so much of a snip that a catching up
reader </span></div><div><span id="yiv1952321863yui_3_2_0_16_1316755110487177">has no idea what is being discussed. Surely not optimal."</span></div><div><span id="yiv1952321863yui_3_2_0_16_1316755110487143"></span> </div><div id="yiv1952321863yui_3_2_0_16_1316755110487152"><span id="yiv1952321863yui_3_2_0_16_1316755110487146">I was discussing the fact that large surface area radiators </span></div><div id="yiv1952321863yui_3_2_0_16_1316755110487184"><span id="yiv1952321863yui_3_2_0_16_1316755110487182">are </span><span id="yiv1952321863yui_3_2_0_16_1316755110487157">required in space to reject accumulating heat.</span></div><div><span></span> </div><div><span>Back in 2006 I ran some numbers using the data from</span></div><div><span>radiators used on the International Space Station to</span></div><div><span>see what was required for a 3,000 megawatt space</span></div><div><span>station [Ice_Station on <span id="misspell-0"
class="mark">yahoogroups</span>].</span></div><div><span></span> </div><div><span>In my view the industrialization of space would</span></div><div><span>start out small doing demonstrator projects for</span></div><div><span>low-g mining and processing - done using remote</span></div><div><span>control and automated processing.</span></div><div><span></span> </div><div><span>Keith Henson has been providing the numbers for</span></div><div><span>powering and cooling a large scale manned nickel </span></div><div><span>mining process.</span></div><div><span></span> </div><div><span>My numbers were for cooling a mixed living quarters</span></div><div><span>light industrial city intended to be located near</span></div><div><span>mining and processing centers on low-g ice bodies.</span></div><div><span>That mining and processing would be done primarily</span></div><div><span>by automated and remote control means.
Ideally</span></div><div><span>large scale processing would be done on ice bodies</span></div><div><span>using the ice/water for a heat sink thus avoiding</span></div><div><span>the large overhead of building heat radiators. </span><span>The </span></div><div><span>Ice Station </span><span>rotates inside an ice shell providing </span></div><div><span>artificial gravity </span><span>and radiation protection.</span></div><div><span></span> </div><div><span>The Ice Station could be cooled by a large radiator,</span></div><div><span>an <span id="misspell-1"><span>umbilical</span></span> system to the ice body, or as Dan</span></div><div><span><span id="misspell-2" class="mark">Ust</span> suggested - rejecting <span id="misspell-3"><span>volatiles<var id="yui-ie-cursor"></var></span></span>.</span></div><div><span></span> </div><div><span>Dennis May</span></div><div><span></span> </div><div
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