Chris Friesen wrote:
HeyBub wrote:
Here's a table of coffee temperatures according to various experts.
The serving temperature ranges from 83°C to 98°C (190°F to 208°F)

http://hypertextbook.com/facts/2003/DianaGendler.shtml

Most of the items in that chart (as well as the text below it) refer
to the brew temperature, not the serving temperature.

According to this study
(http://ift.confex.com/ift/99annual/t...racts/3583.htm) a
serving temperature between 140 and 160 was preferred over both warmer
and cooler coffee.

So design a machine that works according to that model and make yourself
rich.