LAPSE:2019.0362
Published Article
LAPSE:2019.0362
Profitability Variations of a Solar System with an Evacuated Tube Collector According to Schedules and Frequency of Hot Water Demand
Carlos J. Porras-Prieto, Susana Benedicto-Schönemann, Fernando R. Mazarrón, Rosa M. Benavente
February 27, 2019
The use of solar water heating systems with evacuated tube collectors has been experiencing a rapid growth in recent years. Times when there is demand for hot water, the days of use and the volumes demanded may determine the profitability of these systems, even within the same city. Therefore, this paper characterizes the behavior of a solar system with active circulation with the objective of determining the profitability variations according to the timing and schedule of demand. Through a simplified methodology based on regression equations, calculated for each hour of the day based on data from an experimental facility, the useful energy is estimated from the time and frequency of the demand for hot water at 60 °C. The analysis of the potential profitability of the system in more than 1000 scenarios analyzed shows huge differences depending on the number of days when the water is demanded, the time when demand occurs, the irradiation and the average price of energy. In cities with high irradiation and high energy prices, the system could be profitable even in homes where it is used only on weekends. The study of profitability in a building of 10 homes shows that by applying an average European household’s profile for hot water demand, levels close to full potential would be reached; for this, it is necessary to optimize the collection surface.
Keywords
active solar water-heating system, evacuated-tube collector, hot water, profitability, schedule of demand
Suggested Citation
Porras-Prieto CJ, Benedicto-Schönemann S, Mazarrón FR, Benavente RM. Profitability Variations of a Solar System with an Evacuated Tube Collector According to Schedules and Frequency of Hot Water Demand. (2019). LAPSE:2019.0362
Author Affiliations
Porras-Prieto CJ: School of Agricultural, Food and Biosystems Engineering, Agroforestry Engineering Department, Technical University of Madrid, 28040 Madrid, Spain
Benedicto-Schönemann S: School of Agricultural, Food and Biosystems Engineering, Agroforestry Engineering Department, Technical University of Madrid, 28040 Madrid, Spain
Mazarrón FR: School of Agricultural, Food and Biosystems Engineering, Agroforestry Engineering Department, Technical University of Madrid, 28040 Madrid, Spain [ORCID]
Benavente RM: School of Agricultural, Food and Biosystems Engineering, Agroforestry Engineering Department, Technical University of Madrid, 28040 Madrid, Spain
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Journal Name
Energies
Volume
9
Issue
12
Article Number
E1053
Year
2016
Publication Date
2016-12-14
Published Version
ISSN
1996-1073
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Original Submission
Other Meta
PII: en9121053, Publication Type: Journal Article
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LAPSE:2019.0362
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doi:10.3390/en9121053
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Feb 27, 2019
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CC BY 4.0
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Feb 27, 2019
 
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Feb 27, 2019
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Calvin Tsay
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