heizungsbetrieb.de | Optimization1

Our optimization project: "old" heating system

The heating system in words and pictures
An overview of 10-years successful energy-saving in figures
Graphs of running the heating

The heating system until 2001

A look at the picture will show you that the boiler isn't exactly state-of-the-art (1985 model, we changed it in March, 2001). Since optimization began, no changes have been made to the house, and the inside temperatur was always 20ºC. It should be remembered that the boiler has to warm the hot water too.

View of system: burner and distribution

Measured against a 10-year average, we still managed to achieve

a reduction of 27.3% in oil consumption!

Since we started to look after things, one side-effect was the reduction in the switch on/off frequency

from 13627 times "ON" per year

to only 3420 times, which is 76% less or only one-quarter of what it was before! (A "normal" burner switches about 20'000 - 30'000 times a year.)

Changes of this kind naturally save oil and reduce CO₂, soot and pollution. The many other strategies we used in achieving this are our secret.

Data of the old system from 1985 - 2001

Multi-purpose system with water heating via a KL-MT 3.1

(Elco-) Klöckner cast-iron boiler, nominal heating power output 15kW

Oil burner KL 20.1

optimized burner output now with Werner nozzle 0.3 = 11kW.

Distribution: Mixing valve downstream of underfloor heating.

Special control and adjustment features

The combination of two sensors in the heating circuit forming one mean value (at the very top of the picture) is a tailor-made unit from Klöckner 1988 (thanks to Herr Pieck, because Klöckner had nothing like that in the standard range) this came out of an idea I got from Velta.

This mode of adjustment was the precursor of the Veltamat adjuster shown above, and has similar properties to the Klöckner adjuster used.
Ideal Graph of temperatures [Source: Velta]

Wear or rust?
Reducing the enormously high waste gas temperature (approx. 200°C or higher) was achieved using special metal inserts. No trace of corrosion could be found 14 years later, even though the system was always started near the dew point.

An overview of 10-years successful energy-saving in figures

Year	Outside temp. Mean{°C}	No. degree days 15/20{d*K}	Burner on/off	Burn time{h}	Oil used {L/m²} #10		What we did
1990	11.4	3147	measurable	measurable	10.98	12.14	15/9: Switch-on & running time counters built in
1991	10.5	3540	13627	1781	12.78	12.16	-
1992	10.9	3291	10055	1473	12.15	12.42	-
1993	10.4	3509	12011	2089	11.31	11.85	-
1994	11.3	3188	11070	1493	9.76	10.30	04/94 Data gathering unit built in
1995	11.3	3811	6289	1677	10.32	10.38	Min. running time & lower limit temp. changed
1996	9.3	3948	3626	1918	11.72	9.99	Jan.: Atomizer of 0.3/60º etc..
1997	11.1	3295	3274	1487.8	8.57	8.75	Heating pump control & warm water vacation switch installed
1998	11.0	3290	3749	1554.6	8.73	8.95	Test: boiler cleaned, when waste gas >220ºC
1999	11.6	3209.4	3234	1429	8.19	8.59	(Jan.: This table created :-) long time off in summer
2000	11.6	3049	2879	1340.4	7.97	8.80	reducing the burners on/off
10 years' total mean
1991-00	10.90	3366	6986.8	1624.34	10.20	10.30	18.54% annual running time of burner
Savings in 2000, baseline 1991-1993			75.8%		27.3%		170.-euro oil + 33.-euro tax

Key to the 10-years overview:

*
Temperatures
& statistics These data have been logged by us since installing the data logger. The years before we relied on external data recording.
Click on an annual mean temperature to see a graph showing the statistical break-down of temperatures over the year in a new window.

#10
Oil consumption The left-hand value is the consumption-to-surface ratio,
the right-hand value is the calculated mean requirement, standardized to a number of degree days over a 10-year period.
The 25-year mean of number of degree days (1973-1998) is 3498.

~
Current status All figures are for one year, the current status is the 1.3.2001