Operative conditions
The experiments have been conducted for a standard usage of the three cups moka, which is considered tobe a 150 g of water filling of the tank, and a 15g of coffee filling of the funnel. The coffee employed is a 100% Coffea arabica L. blend with a medium roasting degree (total weight loss 16%), coarsely ground powder for stovetop coffee makers. An electrical stove has been used to heat the coffee maker for two different values of heating power. Two series of 10 experiments at 400W and 600W have been made.