If you like Hopper Cooling, you'll love screen cooling 
I actually prefer the two tank system, with a convection riser, like the old timey hydronic heating systems. No parasitic mechanical loss, much less water loss, and convection doesn't start until the system reaches operating temperature. Like having a thermostat, without the pressure drop. Here's a picture of a system from 1919, after a mechanical fan was added, but before a circulating pump was added to create the "modern system".
https://strollingamok.files.wordpress.com/2013/12/thermosyphon_new.jpgThe cooling side component doesn't need to be a radiator, it just needs to have sufficient surface area to provide enough cooling, like the tank shown in the picture shown here.
https://kk.org/cooltools/listeroid-diese/ The beauty of an open system, is that the much greater heat acceptance potential in the phase change, should the water start to boil, provides a fail safe, although you probably wouldn't want to plan to run that way, unless your water is super pure.
Not very practical for vehicles, but would be awesome for heating your house on waste heat from your Listeroid powered generator in the winter, and heating your greenhouse with the waste heat in the summer.
Topic: Some Vintage Films For All Vintage Fanatics (Read 1833 times)