M&V Solar Water Heating Guideline - Eskom

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