EPG
In order to optimize the
efficiency of a solar collector it should have a higher absorptivity of solar
radiation and a lower emissivity of heat radiation. If a solar collector
possesses these properties it is referred to as spectrally selective, which can
be indicated by checking this box. The contribution of the sun to solar energy
systems can be determined by two distinct methods. Checking the current box will
only affect the calculations of method B if the collector type is a flat plate
covered with glass or plastic. If the flat plate does not have any covering,
then the calculations do not take into account the spectrally selective
property. The calculations will always include the spectrally selective property
if the collector type is a vacuum tube.
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EPG |
NEN 7120, paragraaf 19.6.3 Bijdrage zonneboilersysteem
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EPG |
NEN 7120, bijlage I.5 Bijlage I Rekenregels bepaling bijdrage actieve thermische duurzame energie aan warm tapwater en ruimteverwarming
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EPG
In case the solar collector generates electricity in
addition to heat; this can be specified in this box. This will reduce the amount
of heat generated by the collector which is quantified by the reduction factors
to be found in NEN 7120, Tables 20.3 and 20.4.
Upon clicking this box an
additional window appears in which the properties of the PV-panels can be
specified. For more information on these properties, please consult the input of
the PV-panels.
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EPG |
NEN 7120, paragraaf 20.3.2.2 Rekenregels PVT-systemen
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EPG
The collector type can be
specified in this field. The type is only taken into account in the calculations
if the solar contribution is determined in accordance to Appendix B (see
spectrally selective). The flat rate values of the collector types are presented
in NEN 7120, Tables I.2 and I.3.
•Flat plate
•Vacuum tube
EPG
The cover of the collector
type can be specified here. If the collector is a vacuum tube, the glass cover
is always used in the calculations. The cover is included in the calculation
only if the solar contribution is determined according to Appendix B (see
spectrally selective). The flat rate values of the collector types including
cover are presented in NEN 7120, Tables I.2 and I.3.
•None
•Glass
•Plastic
EPG
Percentage f the collector
area that has PV-properties. In most cases 100%
