Could you point me to your post on the thread about Mahe Heating
you are referring to? I couldn't find it.
I am quite interested what you did; we are now in the tropics with our new boat, after selling our Mahé; but in some time we will go to higher latitudes and will need a heating
. (of course I will sail at one moment to Norway
to visit you again.)
And while we had an Eberspacher air heater in our Mahé (a 4 KW which worked perfectly, and had a nice installation), for our new boat I consider a water heater.
More specifically, I understood that it is technically possible to couple a water heater to the hot water heater and the engine coolant
circuit, so that you can keep the one-loop hot water heater.
Is your information otherwise; or did you have other considerations?
And for MKB:
If the water would just be for washing
up the dishes, why not put the kettle on?
And somebody has on this thread already been considering a flow-through water heater on propane
, I remember.
I have considered making a coolant
fluid circuit, using a small pump, which extracts heat from part of the solar panels
and dumps it in the hot water heater.
I already calculated flow requirements for this, and found the right low-power pump for it.
There is some bottleneck in the weight of the copper plate to extract the heat from the solar
panel(s). Alternative is to go to aluminium, except for corrosion
I also put a temperature sensor on the panels
in bright sunlight; it easily reaches 55 centigrade. Ideally it should be over 60 seeing legionella.
But to do this through the single
loop of the hot water heater is not straightforward and requires probably some failure-prone one-way valves. (I would not like to endanger the reliability
of the cooling
of the engines for an experimental set-up)
Alternative would be to use cold water, pump it through the solar
panel heat-exchanger and pump it backwards into the hot water outlet of the hot water heater. This would of course not be sub-zero-temperature proof since it is water instead of coolant fluid.
So still some future engineering to do. Not with a high priority, we have so much to do on our "new" boat.....