DOING ESCOM A FAVOUR: OUTCOME
Some time back I published the article: “ DOING ESCOM A FAVOUR”. The reaction from readers seemed mixed with some for and others against while some stood on the sidelines.
What was forgotten by some commenter is that the geyser
Retains most of the heat in the water of that geyser but it will lose its heat after a period and the entire heating process will be repeated and electrical energy will be wasted.
My article stipulated about 2 hours heating period and the off period will also be in the vicinity of 2 hours approximately.
Tests on the geyser (200 litres) indicated that the 2 hours was sufficient to heat the water to a desired temperature. It is difficult to measure the power consumption during the on period and standard and acceptable meters were used and timed against the temperature. A figure was computed for the power usage of a normally running geyser to the point of switch-off.
After a full operation for a month it was found that the entire savings was about 52% against the normal 44% in a geyser of that size. It must be realised that the difference is due to the geyser switching off by its own thermostat. While the thermostat is switched off the contents of the geyser will cool down before it switches on again and this aspect, in itself leads to geyser inefficiency.
Should the geyser controller be constructed the costs would be around R1000 while other options like an automatic multi-timer may be cheaper but dependent on daily examinations of its settings.
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