When the Rb clock is working, it needs a high temperature, isn't heat dissipation breaking the heat balance?Increased power consumption？
| | 李 | | 邮箱[email protected] | 签名由 网易邮箱大师 定制 On 10/23/2020 20:56, Bob kb8tq wrote: Hi I must admit, the longevity of the compressor based setup in the typical kitchen fridge continues to amaze me. :). ======= TEC’s have a fairly limited “pumping range”. It is not uncommon to discover you need to stack them to get this or that job done. We wound up with a stack of 5 to get one project working. In some designs the TEC / stack never does anything other than run at X current. If the goal is “take care of an Rb out in the (-10 to +45C) garage”, it’s going to see a lot of cycles … Fun !! Bob > On Oct 23, 2020, at 6:29 AM, Poul-Henning Kamp <[email protected]> wrote: > > -------- > >> TEC’s are indeed prone to wear out. That said, so is a compressor ….. > > The mechanism is almost entirely mechanical and running a TEC at a > stable current almost 100% mitigates it. > > The surefire way to force the wearout is to reverse the current > direction a lot. > > Whatever you use to control the TEC, needs to understand that there > is a 1:3 efficiency difference between the two directions, just > slapping a PI(D) on a TEC is guaranteed to kill it. > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > [email protected] | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
