Mighty River Power Ltd - Geothermal
Vent Silica
Analysis – Kawerau
Duration:
6 months
Project Description:
Being a major player in the Power Supply market
in both the Hydro and
Geothermal fields our client had drilled two
experimental geothermal vents.
These were drilled to ascertain whether
the steam being produced out of the
ground was of sufficient quality
to be used for a proposed geothermal power
station.
Our engineering team assisted the clients design department to create
a
control solution that would test the silica scale occurring in
the flow tubes
and record historical data in a SCADA system.
A feature of the system was that once operational no staff would
be present
on site. For this reason an auto dialler and modem were
employed to reach
the on-call staff member by cellphone in case of
a component failure or an
out of specification problem.
Work carried out included:
Adapt one shipping container
in our workshop to include a control cabinet and all of the required
cable entry exit points and junction boxes. The equipment installed
in this container is the control centre for the operators on
this site.
Freight container to site and install
overhead catenaries for cable supports to each field instrument.
Install field bus network for multiple
instruments and flow tubes in the field.
The
remaining instruments were of analogue type and were connected
to a Honeywell PLC and a SCADA system.
Design
control cabinet layout and mechanical assembly. Assemble and
mount control devices, power distribution and PLC components
Commission installation
and assist client’s automation engineers.