Graphs

Graphs of the DHW system

I wrote an own program to read the control's sensor data, and upload it to the WWW. You can see two curves if my laptop is switched on - usually it is when the weather is good enough that I can expect to get some informative data, there's no reason to let the computer run for nothing worth looking at...

detailed data of the last 8 hours (if the logging computer is switched on)

Translation of the items in the chart legend
German	English	Sensor position in 'System Schematics'
Kollektor	Collector (Panel)	S1
Speicher oben	Top of Reservoir	S3
Vorlauf	Advance Flow/Inflow (?)	S5
Vorlauf (Pumpengruppe)	Advance Flow/Inflow (?) (Solar Station)	S4
Ruecklauf	Back Flow/Outflow	S2
Durchfluss	Fluid Flow
Pumpe EIN/AUS	Pump ON/OFF
Pumpendrehzahlstufe	Pump speed
Leistung (Modul)	Momentary power, calculated by control
Leistung (berechnet)	Momentary power, calculated by myself

Result

The following graph shows how much the oil consumption went down. In addition to the DHW system, we bought a stove that we use as additional heating. The graph shows

The effects of the stove, bought in August 2004
And the DHW system, installed at the end of march in 2004

Monthly results

Oil consumption graph

Monthly results (gliding mean value)

Oil consumption graph The vertical axis shows the time the bruner was working (hours per day). It went down significantly, although mostly due to the wood stove, of course.