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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. Rich Felker‏ @RichFelker Sep 10

      I want a dumb analog thermostat implementing the equivalent of: if (temp<A) heat_on(); else if (temp>B || humidity>C) cool_on(); else all_off(); (Yes, cycling back and forth at temp~=A until humidity<=C)

      2 replies 0 retweets 3 likes
    2. Robert Ou‏ @rqou_ Sep 10
      Replying to @RichFelker

      Shouldn't your algorithm have some hysteresis on the humidity too?

      1 reply 0 retweets 0 likes
    3. Rich Felker‏ @RichFelker Sep 10
      Replying to @rqou_

      The [A,B] isn't for hysteresis, it's just an acceptable/comfort range. Since there's never an operation to increase humidity, it doesn't need one.

      1 reply 0 retweets 0 likes
      Rich Felker‏ @RichFelker Sep 10
      Replying to @RichFelker @rqou_

      Although maybe if you lived in AZ you'd want logic to integrate with evaporative coolers to save energy. :-)

      10:36 AM - 10 Sep 2018
      • 1 Like
      • Matthew Hardeman
      2 replies 0 retweets 1 like
        1. New conversation
        2. Matthew Hardeman‏ @mdhardeman Sep 10
          Replying to @RichFelker @rqou_

          Another design consideration you might need to consider is that some systems are designed to support simultaneous operation of heat & cooling functions for dehumidification even while heating.

          1 reply 0 retweets 0 likes
        3. Rich Felker‏ @RichFelker Sep 10
          Replying to @mdhardeman @rqou_

          Yeah, I would assume systems designed for that are normally already setup with a thermostat/controller to make use of it, though, no?

          1 reply 0 retweets 0 likes
        4. Matthew Hardeman‏ @mdhardeman Sep 10
          Replying to @RichFelker @rqou_

          Sadly, there are a LOT of incompetent HVAC people pushing a lot of complex solutions terribly misconfigured.

          1 reply 0 retweets 1 like
        5. Rich Felker‏ @RichFelker Sep 10
          Replying to @mdhardeman @rqou_

          I totally believe it. I've never met one who wasn't pushing over-spec'd systems guaranteed not to dehumidify at all because they'll only run at 5-10% duty cycle.

          1 reply 0 retweets 1 like
        6. Matthew Hardeman‏ @mdhardeman Sep 10
          Replying to @RichFelker @rqou_

          Yes, by far that's the biggest sin, and it sucks because it essentially guarantees that clammy feeling. On the bright side, it's such a big problem that the manufacturers have been implementing better internal sensors and variable speed blower fans to help compensate.

          0 replies 0 retweets 0 likes
        7. End of conversation
        1. Matthew Hardeman‏ @mdhardeman Sep 10
          Replying to @RichFelker @rqou_

          And, indeed, to increase total humidity for those of us who peel like lizards when spending time in the desert. Yuck. I hate dry places.

          0 replies 0 retweets 0 likes
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