M&V Solar Water Heating Guideline - Eskom

Measurement and Verification Standard Guideline for Low Pressure Solar Water Heating Systems v1r1
Lunch tea 1.8 0 0.00 80 0.001167 96 16 90
EVENING 9 7.2 0.75 80 0.001167 96 16 90
Evening cooking 1.8 0 0.00 80 0.001167 96 16 90
Evening bath /sanitation 3.6 3.6 0.37 80 0.001167 96 16 90
Evening dishes washing 1.8 1.8 0.19 80 0.001167 96 16 90
Others 1 x 1.8 l 1.8 1.8 0.19 80 0.001167 96 16 90
Total per day 27 19.8 2.05 Total Baseline energy is 2.05 kWh
Mixing of Hot Water
The hot water of each kettle is mixed with cold water in a ratio of say 1:4 in order to be
usable for bathing , washing etc. This process is illustrated in Figures 24 and 25.
}
1 Kettle
Hot Water
1.8 l at 96 o C
}
4 Kettles
Cold Water
4 x 1.8 =7.2 l
at 16 o C
Figure 24: Mixing of hot water boiled by a kettle with cold water in ration 1:4 for further
usage by the household.
38
}
1 Bucket
Mixed Water
5 x 1.8 = 9 l
at 33.78 o C