PFS Meta Controller

  • Current

    2023 Jul/08-Jul/26

    July/23: 

    Glycol: I=1.0

    July/23:
    The pump motor was replaced.
    This reduced the frequency of "flushing" events but did not eliminate them.
    The glycol supply remains about 0.15 [C] higher than the control value.

    Since July/20:
    The PLC temperature controller is acting up. The pump intermittently switches to full power. Under investigation ...

    July/18 (17:30):
    Re-enabled the meta-controller

    July/18 (13:00):
    Shut down the meta-controller on pfs@guanaco, testing for interference from a "guanaco clone" ... divergence ... ie. there is no other meta-controller running.

    Since July/11: 

    Glycol: Pg=2.0, I=0.3, F=-0.400+0.0470*(SetP-Tout)+"GTC"
    Since June/29: 
    Glycol: Pg=2.0, I=0.3, F=-0.400+0.0440*(SetP-Tout)+"GTC"
GTC = (glycol_supply-glycol_return-0.410)/2 - 0.021*MAX(0,Tout-17.0)
Air: Pa=15.0, Da=10.0
DHT = +0.270
PMT = -0.105
LN2(bank) = 0.75
LN2(cap) = 0.65