Thermal Capacity; Idle Temperature; Steam Production Capacity - Viessmann VITOSOL 100-F SV Technical Manual

Principles
(cont.)
Vacuum tube collectors
Vitosol 200-T, type SP2A
1
0.80
0.70
0.60
0.50
3
0.40
0.30
0.20
0 20 40
Temperature differential
(absorber – environment) in K
Vitosol 200-T, type SPE
1
0.80
0.70
0.60
0.50
3
0.40
0.30
0.20
0 20 40
Temperature differential
(absorber – environment) in K

Thermal capacity

The thermal capacity in kJ/(m 2 · K) indicates the amount of heat absor-
2
bed by the collector per m and K. This heat is only available to the
system to a limited extent.

Idle temperature

The stagnation temperature is the maximum temperature that the col-
lector can reach during insolation of 1000 W/m

Steam production capacity

The steam production capacity in W/m
at which a collector produces steam during stagnation and transfers it
to the system, when evaporation occurs.
VITOSOL
2
4
60 80 100
2
4
60 80 100
2 .
2
indicates the maximum output
Vitosol 300-T, type SP3B
1
0.80
0.70
0.60
0.50
3
0.40
0.30
0.20
0 20 40
Temperature differential
(absorber – environment) in K
If no heat is drawn from the collector, it will heat up until it reaches the
stagnation temperature. In this state, the thermal losses are of the
same magnitude as the radiation absorbed.
2
4
60 80 100
VIESMANN
9
1