M&V Solar Water Heating Guideline - Eskom

Measurement and Verification Standard Guideline for Low Pressure Solar Water Heating Systems v1r1
6.2.1 Installed Electrical Appliances at a Typical Low-cost House .................................. 24
6.2.2 Electricity Usage / Load Profiles at Low-cost Housing Environment ..................... 25
6.3 Installation of Dedicated M&V Equipment at Project Sites .......................................... 28
6.4 Base Line Methodology ................................................................................................. 29
6.4.1 Base Line Main M&V Question .............................................................................. 29
6.4.2 Interviews with the inhabitants .............................................................................. 29
6.4.3 Using Base Line Measurements by Dedicated SWH data Loggers after the
Retrofit .............................................................................................................................. 30
6.4.4 Measurements of the Electrical Energy Prior and after Retrofit at the Household
.......................................................................................................................................... 31
6.4.5 Recommendations for Baseline Procedure ............................................................ 32
7 Determination of the Savings .............................................................................................. 32
7.1 M&V RECOMMENDED OPTION ............................................................................................. 33
7.2 MAIN M&V QUESTION FOR DETERMINATION OF THE SAVINGS RESULTING FROM LOW PRESSURE
SOLAR WATER HEATING SYSTEMS ................................................................................................ 33
7.2.1 Scenario 1: Baseline energy in [kWh] is less or at least equal to the retrofit
(LPSWH system) energy output in [kWh] ......................................................................... 33
7.2.2 Scenario 2: Baseline energy in [kWh] is higher or at least equal to the retrofit
(LPSWH system) energy output in [kWh] ......................................................................... 34
7.2.3 Examples to illustrate the energy savings .............................................................. 34
8 Thermal Performance Model of Low Pressure Solar Water Heating Systems .................. 35
9 SUMMARY ............................................................................................................................ 36
10 A Worked Example for Development of the base Line AND DETERMINATION OF THE
ENERGY SAVINGS of a lpswh project ....................................................................................... 37
11 REFERENCES ....................................................................................................................... 44
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