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C.A. Calistru:
"Estimation of electrical lighting energy use in buildings: a method comparison";
Supervisor: A. Mahdavi; Institut für Architekturwissenschaften, Abteilung Bauphysik und Bauökologie, 2013; final examination: 2013-11-20.

To satisfy the requirements of users in buildings, the visual
environment needs to meet certain conditions. Specifically, adequate
illuminance levels must be maintained dependent on the rooms'
function and usage. Toward this end, electrical lighting must be
deployed in many instances. However, the use of electrical lighting
and the associated electrical energy use can be reduced by appropriate
utilization of daylight.
To estimate, in a convenient manner, the electrical energy use for
lighting in buildings, there are a number of simplified procedures. An
example of such a procedure involves the use of the indicator LENI
(Lighting Energy Numeric Indicator). Using this indicator, area-related
electrical energy use can be calculated on a room-by-room basis.
However, such procedures involve a significant number of
simplifications with regard to building geometry, properties of
relevant building components (e.g., windows, shading), climatic
context and occupancy.
In this context, the present master thesis has the purpose to explore the
reliability of these procedures and calculation methods presented in
the EN 15193 standard.
Toward this end, this study compares for a sample of rooms (e.g.,
lecture room, office space) the results obtained by simplified and
detailed calculation methods with results obtained using
measurements, in view of electrical energy demand for lighting in
buildings. The research results are expected to further define the
degree to which simplified calculation results could deviate from more
detailed estimations or measurements.

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