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Christian Brosig, Eberhard Waffenschmidt,
"Energy autarky of households by sufficiency measures",
10th International Renewable Energy Storage Conference (IRES 2016),
Düsseldorf, 15.-17.3.2016.
A consciousness about being independent from energy suppliers is spreading
due to several reasons. Many authors already analyzed PV battery systems
with a focus on the grade of autarky and self-consumption. But what
if someone really wants to be autarkic? How could this person influence
the personal grade of satisfaction and with what does the person have
to cope with?
To quantify these questions, a new parameter is introduced: the sufficiency
indicator. It describes the qualitative rate of self-sufficiency and
involves personal ratings of devices. It is expected to express the
user's contentment and two measures are identified to maximize it: shifting
of loads and prioritized shutdown of devices. As contentment is a very
personal value, a survey was conducted, where 150 people indicated their
personal values bound to devices and their ability to shift their use.
They are classified into groups of standard households. These households
are simulated as PV battery systems taking load shift and prioritized
shutdown into account. The results are used to characterize the sufficiency
indicator, to visualize abandonment and to expose the potentials of
the sufficiency measures.
As a conclusion, the sufficiency indicator can be proved as meaningful
to visualize how sufficiency measures affect the contentment of the
household. Shifting of devices does not always lead to more contentment,
as important devices, such as lighting, cannot be shifted. Prioritized
shutdown brings more contentment, but reduces the grade of self-sufficiency
in general.
The publication is based on the Master
Thesis of Christian Brosig.
> Pre-print of the proceding: PDF-Document
(1.3 MB)
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Load profile (top) and renunciation (bottom, energy
which is missed) of a typical household.with PV system and battery storage.
The PV generates the amount of yearly needed energy and the battery
can store halve of the average daily demand. The horizontal axis corresponds
to the day of the year and the vertical axis to the hour of the day.
The color indicates the related value.
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