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Energies 2014, 7(11), 6837-6855;

A New System to Estimate and Reduce Electrical Energy Consumption of Domestic Hot Water in Spain

Department of Computer Sciences, Polytechnic School, University of Alcala, Road Madrid-Barcelona, Km 33.6, Alcala de Henares 28871, Spain
Faculty of Organization and Informatics, University of Zagreb, Pavlinska 2, Varazdin 42000, Croatia
Author to whom correspondence should be addressed.
Received: 16 May 2014 / Revised: 7 October 2014 / Accepted: 17 October 2014 / Published: 24 October 2014
(This article belongs to the Special Issue Energy Efficient Building Design and Operation 2014)
PDF [961 KB, uploaded 17 March 2015]


Energy consumption rose about 28% over the 2001 to 2011 period in the Spanish residential sector. In this environment, domestic hot water (DHW) represents the second highest energy demand. There are several methodologies to estimate DHW consumption, but each methodology uses different inputs and some of them are based on obsolete data. DHW energy consumption estimation is a key tool to plan modifications that could enhance this consumption and we decided to update the methodologies. We studied DHW consumption with data from 10 apartments in the same building during 18 months. As a result of the study, we updated one chosen methodology, adapting it to the current situation. One of the challenges to improve efficiency of DHW use is that most of people are not aware of how it is consumed in their homes. To help this information to reach consumers, we developed a website to allow users to estimate the final electrical energy needed for DHW. The site uses three estimation methodologies and chooses the best fit based on information given by the users. Finally, the application provides users with recommendations and tips to reduce their DHW consumption while still maintaining the desired comfort level. View Full-Text
Keywords: estimation; methodology; residential buildings; water consumption estimation; methodology; residential buildings; water consumption

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Gutierrez-Escolar, A.; Castillo-Martinez, A.; Gomez-Pulido, J.M.; Gutierrez-Martinez, J.-M.; Stapic, Z. A New System to Estimate and Reduce Electrical Energy Consumption of Domestic Hot Water in Spain. Energies 2014, 7, 6837-6855.

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