Am 31.10.2011 21:17, schrieb Jed Rothwell:
Peter Heckert wrote:
I cannot imagine this heating energy being compressed on some m^3
small space without becoming very hot.
There must be an air flow of 4 m^3 / s if 20° air is heated to 100°
(without thermal expansion of air being considered)
I cannot imagine that either, but what is your point? The heat is not
being confined or compressed in a small space.
480 kW is enough to heat the big St Thomas Church in winter. They use
many spatial distributed heaters to heat the church.
Compared to this the heating source in Rossis system is compressed to a
footprint of some m^2.
It is outdoors. It is being blown into the air. The amount of heat and
fans and radiators are roughly the same size as those on the diesel
locomotive parked in a railroad station. When you walk by a locomotive
you feel a blast of hot air but the air is not confined and the
platform does not get hot.
The use some splywood boards like Rossi and build these airtight around
the locomotive, this way that the flow of cold input air is inhibited,
set the locomotive to 470 kW power and see what happens.
Modern diesel electric locomotives range from 3 to 5 MW. They produce
a lot more waste heat than that when they are underway. When they are
sitting at the platform after a trip, cooling down, I suppose they
emit roughly 1 MW of heat.
- Jed
