<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>contemporary343</author><text>If you insulate it in vacuum with an IR transparent window (unfortunately $$$) you can get substantially cooler than ambient: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.nature.com&amp;#x2F;articles&amp;#x2F;ncomms13729&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.nature.com&amp;#x2F;articles&amp;#x2F;ncomms13729&lt;/a&gt;</text><parent_chain></parent_chain></comment><story><title>Using a solar oven as a radiant refrigerator at night</title><url>http://solarcooking.org/radiant-fridge.htm</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>simonblack</author><text>Many years ago, I had an indoor swimming pool with solar heating. Some days in the middle of summer that water got too warm. So I&amp;#x27;d run the water through the black plastic solar collectors at night-time to throw away that excess heat.</text><parent_chain></parent_chain></comment><story><title>Using a solar oven as a radiant refrigerator at night</title><url>http://solarcooking.org/radiant-fridge.htm</url></story>