Tjyven Is thermosymphon in general slower than dipper? (La San Marco is dipper)
Probably the opposite, water carries a lot of heat and efficiently transfers it…the water in the thermopsyphon is at boiler temperature….until the machine is used and cold water floods in. Of course there is the open themosyphon idea, where the incoming feed is from the boiler directly and the dipper single tube etc…
All intended to try and warm the group, by conduction or convection….it’s quite likely the true traditional dipper is the slowest of them all unless you flush lots of water through when up to temp (pointless with a closed themrmosyphon of course because it refills with cold water).
The heater cartridges in the group is the ideal method, as are twin boilers, because:
- fastest method (15m)
- divorces steaming and brewing (removes the inevitable compromise)
- maintains stable brew temps
- can change brew temps in minutes
- only heating the water you need
- don’t have to run the steam boiler all the time (lower internal, temperatures
- saves energy (heat loss is a 4th power law).
- you can actually tun the machine off if not using for a while, because a 15m warm up is not particularily long (saves energy)
Of course the various purveyors of simple lever machines would have you think their machines are magic, rather than using science to give the best results.