Some corrected thoughts.
For the secondary circuit only one flow meter is needed, and two
thermometers. For the primary circuit, input and output flow meters
should be used, and two thermometers. It is important not to assume
the pump outputs at a constant rate against all pressures into the E-
cat. Knowing both primary circuit flow rates, which can be very
different, due to the water storage capacity of the E-cat, provides
some information about what is happening inside the E-cat, and
decouples the output flow and pressure from the input. If only one
primary side flow meter is available it should be on the output of
the condenser, where heat measurement is most critical. A
comparatively inexpensive manually read accumulating water meter
could be used on the input side, for verification purposes and to
manually diagnose problems like low input flow.
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/
