Controlling building indoor temperature and reducing heating cost through night heating electric stove |
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| Affiliation: | 1. School of Electrical and Computer Engineering, Shiraz University, Shiraz, Iran;1. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China;2. Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China;1. Department of Civil and Structural Engineering, School of Engineering, Aalto University, PO Box 12100, FIN-02015 Espoo, Finland;2. College of Construction Engineering, Jilin University, Changchun 130026, PR China;1. LACES (Laboratório de Catálise e Energia Sustentável) – Instituto de Química da Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 149, bloco A, Ilha do Fundão, RJ, CEP:21941-909, Brazil;2. Laboratorio de Catalise Heterogênea – Instituto de Química da Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 149, bloco A, Ilha do Fundão, RJ, CEP:21941-909, Brazil;3. Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, Berlin 14195, Germany;4. Laboratoire de Synthèse, Réactivité Organiques et Catalyse, Institut de Chimie, UMR CNRS 7177, Université de Strasbourg, 1 rue Blaise Pascal, 67000 Strasbourg Cedex, France;1. School of Electrical and Electronics Engineering of University of Manchester, Oxford Rd, Manchester M13 9PL, UK;2. Department of Electrical and Computer Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, WI 53706, USA |
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| Abstract: | This paper investigates the use of massive electric stove as a thermal storage in order to reduce the heating cost associated with maintaining indoor comfort condition in building. The control of electric stove takes advantage of low night-time electrical rate by shifting heating loads from day-time to night-time. A general numerical modelling of thermal behaviour of building envelope, electric stove and indoor air under the condition of outdoor variation is presented in detail. The resultant non-linear system of the heat balance equations, partial differential equations, is solved numerically. Besides the modelling work, attention is put on the control of electric stove’s night heating in such way that the stove-stored energy is released during day-time without sacrifice of indoor comfort. A simple control algorithm is given. Model applications show that the night heating with a proper size massive electric stove as a building thermal storage is cost-effective for buildings with night electrical rate benefit, while maintaining a comfortable indoor temperature in the building. Simulation also illustrates that up to 28% heating cost saving can be obtained compared with conventional direct heating. |
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