M&V Solar Water Heating Guideline - Eskom

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Measurement and Verification Standard Guideline for Low Pressure Solar Water Heating Systems v1r1 Table 3: Example of Essential parameters extracted form SABS Test Report for a typical LPSWHS No Parameter determined by Test Report according to: SANS 6211- 1: (or part 2) 2003 22 Symbol Units Value as per SABS Test Report Coefficient 1 m 2 0.625150588 1 2 Coefficient 2 MJ/K -0.034373641 3 Coefficient 3 MJ 2.114795133 4 Heat capacity of the tank Cs MJ/K 307798.3 5 Heat loss coefficient Us W/K 0.482 6. Q-factor/value Q MJ 11.773 5.3 Accuracy and Errors of the Tests at SABS As evident from the extracts from the SABS test reports the standard error when determining the LPSWH system coefficients is high (often more than the value of the coefficient itself). However, the M&V process will consider that these tests are justifiable since they are the corner stone for participation in ESKOM’s and Government SWH Programmes [1] and [2]. 6 BASELINE OF LOW PRESSURE SOLAR WATER HEATING PROJECTS 6.1 Typical Site Description The LPSWHSs typically fall out in the rollout Programmes launched to the undeveloped communities. A typical such a site is shown in Figure 12.
Measurement and Verification Standard Guideline for Low Pressure Solar Water Heating Systems v1r1 Figure 12: Typical installation site foe LPSWH Systems The living environment and the underdeveloped infrastructure make the installation and more over the safety for the M&V equipment and personnel very difficult. Individuals should therefore take the necessary care to avoid any incidences and/or damage to property. Electrical connections in the low-cost houses might be very unconventional and unsafe as evident from Figure 13. Figure 13: Electrical Installations at RDP Houses pose hazards for the inhabitants of the houses and M&V teams. 23
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M&V Solar Water Heating Guideline - Eskom

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