The
Heat-Meter (HM) readout project is a part of a heating logger system for
a Groundwater Heatpump. It allows to display and log current temperatures,
consumed AC power, generated Heating power, the status of the
groundwater wells, pressure in the groundwater pipes and some other
important informations.
(click
to
the picture)
The
HM readout PCB can directly be mounted onto an Allmess Echo CF-II
or a similar unit. Depending on the DIP-switch and some
jumpers, the HM result can either be read out selfcontained via a
standard RS232 connection or on request by a host via a seriall
(TTL) data stream, similar to RS232. There is a document which describes
the request and answer structure.
For
battery powered Heat Meters, it is important to disconnect the
batteries, because they are intended for not more than a single read
outs during an hour. The logger requests result any 30 seconds.
The pictures below show what to do to use the batteries just for backup.
(click
to
the pictures)
If
the HM board is a member of the heating logger system, the result of the
readout can be displayed on the screen of the logger controller as
current produced heat. If the AC power of the heatpump is also
available, the current COP (Coefficient Of Performance) can then be
calculated and displayed.
(click
to
the picture)
As
an example , the picture below shows different temperatures , AC power,
heating power and the current COP in a diagram. The used SW is RealView by Abacom.
