Daylighting and energy analysis for air-conditioned office buildings |
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| Affiliation: | 1. Public Health Department, Federal University of Maranhão, São Luís, MA, Brazil;2. Department of Neuroscience and Behavior, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil;1. School of Physical Sciences and CAS Key Laboratory of Vacuum Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;2. Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;3. Department of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore;4. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore;5. CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China;6. Songshan Lake Materials Laboratory, Dongguan 523808, China;7. Department of Physics and Astronomy and Department of Electrical and Computer Engineering, Vanderbilt University, Nashville, TN 37235, USA;1. Department of Environmental Biological and Pharmaceutical Sciences and Technologies, Second University of Naples, Via Vivaldi 43, I-81100 Caserta, Italy;2. Institute of Pharmaceutical Sciences, Department Pharmacognosy, Karl-Franzens University Graz, Universitaetsplatz 4/1, 8010 Graz, Austria |
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| Abstract: | We propose a simple method for estimating the likely energy savings in electric lighting due to daylighting and the possible cooling penalty. Fractions of the working year and cooling season when daylighting alone is adequate to provide the indoor design illuminance are presented for on-off and top-up controls. Based on the simple average daylight factor method, energy savings in electric lighting have been estimated for a generic office building using measured outdoor illuminance data in Hong Kong. The daylight-induced cooling penalty is estimated using average solar heat gain factors. Our case study suggests that daylighting schemes can result in substantial energy savings in air-conditioned office buildings in Hong Kong. |
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