M&V Solar Water Heating Guideline - Eskom

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Measurement and Verification Standard Guideline for Low Pressure Solar Water Heating Systems v1r1 3.3 Influence of the Local Climatic Conditions on the SWH System Performance 3.3.1 Climatic Zones in South Africa The performance of any SWH system is influenced in a great deal by the geographic location of the installation site and it is extremely seasonal. Thus, the actual installation site will be a dominant factor in the system thermal performance and related energy savings from the retrofit. The average annual solar energy potential per day is shown in Figure 6 and 7. It is evident that the South African solar potential could be simplified if the country is divided into six regions according to the availability of solar incoming energy as presented in Figure 8. Obviously, the same type of SWH system will perform differently if it is installed on different climatic regions. Figure 6: Southern Africa average annual solar energy potential per day in [ kWh/m 2 ] Source [8] 12
Measurement and Verification Standard Guideline for Low Pressure Solar Water Heating Systems v1r1 Figure 7: Southern Africa average annual incoming solar power potential per day in [ kW/m 2 ] Source [8] Figure 8: South Africa’s solar energy radiation zones 13
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M&V Solar Water Heating Guideline - Eskom

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