The radiator is assumed to be 10°C above ambient, so net heat flow is *from* radiator *to* environment.
Out of curiosity, I ran the figures through
this
For one side only, at 40°C surface and 30°C amb, heatloss through radiation only:
ALUMINIUM SURFACE: 1.9W
MATT BLACK SURFACE: 8.5W
Black surface emits 6W more, which is 10% of 60W. (CQFD
)
Edit(addition, whatever
): Found a practical way of adding fins. Now at 1.95m2 surface area (twice as much as the - ahem - competition
)
Comments, criticism, ideas and suggestions all welcome (apart from why the aluminium doesnt actually look like aluminium
)