Abstract
A significant proportion of the total energy consumption in office buildings is attributable to lighting. Enhancements in energy efficiency are currently achieved through strategies to reduce artificial lighting by intelligent daylight utilization. Control strategies in the field of daylighting and artificial lighting are mostly rule-based and focus either on comfort aspects or energy objectives. This paper aims to provide an overview of published scientific literature on enhanced control strategies, in which new control approaches are critically analysed regarding the fulfilment of energy efficiency targets and comfort criteria simultaneously. For this purpose, subject-specific review articles from the period between 2015 and 2020 and their research sources from as far back as 1978 are analysed. Results show clearly that building controls increasingly need to address multiple trades to achieve a maximum improvement in user comfort and energy efficiency. User acceptance can be highlighted as a decisive factor in achieving targeted system efficiencies, which are highly determined by the ability of active user interaction in the automatic control system. The future trend is moving towards decentralized control concepts including appropriate occupancy detection and space zoning. Simulation-based controls and learning systems are identified as appropriate methods that can play a decisive role in reducing building energy demand through integral control concepts.
Highlights
Buildings are responsible for more than one third of the world’s energy demand [1,2]
While some previous work tended to focus on energy savings, Ding et al observe a trend toward integrating visual comfort and energy efficiency in their review article on control logics for office lighting [42]
The growing importance of proper controls of daylight- and artificial lighting systems, which allow optimizing a building’s energy efficiency while considering visual and thermal comfort is underpinned by the results of the reviewed literature
Summary
Buildings are responsible for more than one third of the world’s energy demand [1,2]. Action plans for the renovation of the existing building stock are proposed In this context, Economidou et al provide an overview of the development of energy efficiency policies on new buildings and building renovations in the European Union and the related instruments to promote these measures [3]. Economidou et al provide an overview of the development of energy efficiency policies on new buildings and building renovations in the European Union and the related instruments to promote these measures [3] It identifies progress and challenges as well as potentials that could promote energy savings in buildings. Several studies show an energy savings potential of integrated daylight and artificial lighting controls to be 30–80% in artificial lighting energy [4,5,6] and 3–43% savings in heating, ventilation, and air conditioning (HVAC) energy demand [7]
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