Originally Posted by s/v Jedi
If I would build it today, I would do it exactly the same. The energy consumption
is dependent on box volume, insulation
conditions and on how much warm stuff is put in to cool, NOT on which model Frigoboat. Choose the Frigoboat components on alculated maximum cooling
needed and switch to bigger unit when the math shows close to max. With smaller unit. For example: the BD50 has 5 speeds and will be better efficiency on low speed than a BD35 maxed out.
Good to hear from you and thanks for the feedback. I think my boxes sizes are on the borderline between the BD50 and BD35 compressors or F160 or F200 evaporators and either could work. In the attached links there is a test that that shows that the BD35 could be a better choice. The BD50 has 25% greater capacity but it comes with a 40% increase in consumption.
I'll wait till the Italian Frigoboat are back from the holidays and see what they say. By the way, which evaporators did you use? I can't make it out from the pics.
How is your system doing when it comes to evaporator frosting? How often do you defrost in the tropics?
Here in Malaysia
my home fridge needs defrosting every few days which is a major PIA. The ice in on the evaporator insulate it and it keeps the compressor
going all the time.
I am thinking of installing a foil heater in the space between the evaporator and the box wall. Frigoboat has a thermostat with defrost function that can control it.
I have worked on walk in large refrigeration
plants and they all have defrosting system. Without it the plants don't work well and it is impossible to reach very low temps (-20 or lower)
In my case the energy loss for defrosting is not a problem as at mid day I will have plenty of spare energy from solar
. Even if I did not I could defrost any time I motor
I don't understand why Frigoboat or others don't offer defrosting kits.