M&V Solar Water Heating Guideline - Eskom
M&V Solar Water Heating Guideline - Eskom
M&V Solar Water Heating Guideline - Eskom
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Measurement and Verification Standard <strong>Guideline</strong> for Low Pressure <strong>Solar</strong> <strong>Water</strong> <strong>Heating</strong> Systems v1r1<br />
Table 3: Example of Essential parameters extracted form SABS Test Report for a typical<br />
LPSWHS<br />
No<br />
Parameter determined by Test<br />
Report according to: SANS 6211-<br />
1: (or part 2) 2003<br />
22<br />
Symbol<br />
Units<br />
Value as<br />
per SABS<br />
Test Report<br />
Coefficient 1 m 2 0.625150588<br />
1<br />
2 Coefficient 2 MJ/K -0.034373641<br />
3 Coefficient 3 MJ 2.114795133<br />
4 Heat capacity of the tank Cs MJ/K 307798.3<br />
5 Heat loss coefficient Us W/K 0.482<br />
6. Q-factor/value Q MJ 11.773<br />
5.3 Accuracy and Errors of the Tests at SABS<br />
As evident from the extracts from the SABS test reports the standard error when<br />
determining the LPSWH system coefficients is high (often more than the value of the<br />
coefficient itself). However, the M&V process will consider that these tests are justifiable<br />
since they are the corner stone for participation in ESKOM’s and Government SWH<br />
Programmes [1] and [2].<br />
6 BASELINE OF LOW PRESSURE SOLAR WATER HEATING<br />
PROJECTS<br />
6.1 Typical Site Description<br />
The LPSWHSs typically fall out in the rollout Programmes launched to the<br />
undeveloped communities. A typical such a site is shown in Figure 12.
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