M&V Solar Water Heating Guideline - Eskom

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Measurement and Verification Standard Guideline for Low Pressure Solar Water Heating Systems v1r1 Figure 10: Principle of operation of a LPSWS employing an evacuate d tube solar collector Figure 11: LPSWS employing evacuated tubes solar collector 16
Measurement and Verification Standard Guideline for Low Pressure Solar Water Heating Systems v1r1 Low pressure SWH systems can be equipped with an electric back-up element in a similar manner as the High-pressure SWH systems. However, for the purposes of this Guideline which serves ESKOM’s Low Pressure Solar Water Heater Roll-out Programme the Lowpressure SWHs will be considered without any electrics back-element. 4 LOW PRESSURE SOLAR WATER HEATING SYSTEMS AS RETROFIT PROJECTS OR AS GREENFIELD PROJECTS 4.1 Retrofit projects These Projects are based on existing systems that are already in operation, and are either replaced with more energy efficient ones or operated in an altered fashion to deliver DSM impacts. The systems exist prior to the EEDSM intervention and allow for baseline metering [9]. 4.2 Greenfield Projects Greenfield Projects (also referred to as new construction projects) deals with systems that are not in operation at time of the EEDSM proposal [9]. The proposed energy conservation measures for the DSM programme are consequently integrated into the design and construction of new systems. The systems do not exist to allow for baseline metering. [9] Thus, the fundamental difference between the M&V of Retrofit and Greenfield projects is related to the system baseline that is used as a reference point from which project impacts are determined.[9] 4.3 Low Pressure Solar Water Heating Systems as Retrofit Projects Low Pressure Solar Water Heating EEDSM Projects could fall into the scope of the Greenfield Projects since the LPSWHS (or similar dedicated water heating unit ) did not exist before the retrofit . However, due to the M&V fundamental reporting methodology applicable the EEDSM projects, the projects are to be classified as Retrofit Projects. The main reason for this is the fact that prior the Retrofit, the projects had a base line determined by taking into account ONLY the electrical energy used for heating of water at the households prior the retrofit. 5 TESTING OF LOW PRESSURE SOLAR WATER HEATING SYSTEMS. 17
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M&V Solar Water Heating Guideline - Eskom

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