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Energy Saving in an ETC Solar System to Produce High Temperature Water

Author

Listed:
  • Carlos J. Porras-Prieto

    (Agroforestry Engineering Department, School of Agricultural, Food and Biosystems Engineering, Universidad Politécnica de Madrid, 28040 Madrid, Spain)

  • Juan Lizcano

    (Agroforestry Engineering Department, School of Agricultural, Food and Biosystems Engineering, Universidad Politécnica de Madrid, 28040 Madrid, Spain)

  • José L. García

    (Agroforestry Engineering Department, School of Agricultural, Food and Biosystems Engineering, Universidad Politécnica de Madrid, 28040 Madrid, Spain)

  • Fernando R. Mazarrón

    (Agroforestry Engineering Department, School of Agricultural, Food and Biosystems Engineering, Universidad Politécnica de Madrid, 28040 Madrid, Spain)

Abstract

The use of solar water heating systems (SWHS) based on evacuated tube collectors (ETC) has experienced rapid growth in the residential sector. In contrast, the implementation of these systems in the industrial sector is very limited, due in part to the demand of a higher temperature in water. Taking into account that the final energy of the industrial sector is similar to the residential sector, to increase the generation of renewable energy and energy saving in cities, efforts in this sector should be redoubled. Therefore, the present work characterises the behaviour of a SWHS-ETC with active circulation to produce hot water at 90 °C, determining its performance, energy saving and profitability in different scenarios in Europe. The annual energy savings generated by the SWHS Range between 741 and 435 kWh m −2 (reduction of emissions between 215 and 88 kg CO 2 m −2 ). The results of the analysis of profitability, studying the variation of the conventional energy price, the cost of the investment, the useful life and the energy supplied, in thousands of scenarios, are a valuable tool for correct decision making, as they can be of great utility to increase the implementation of these systems in the industrial sector.

Suggested Citation

  • Carlos J. Porras-Prieto & Juan Lizcano & José L. García & Fernando R. Mazarrón, 2018. "Energy Saving in an ETC Solar System to Produce High Temperature Water," Energies, MDPI, vol. 11(4), pages 1-14, April.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:4:p:840-:d:139548
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    References listed on IDEAS

    as
    1. Sokhansefat, Tahmineh & Kasaeian, Alibakhsh & Rahmani, Kiana & Heidari, Ameneh Haji & Aghakhani, Faezeh & Mahian, Omid, 2018. "Thermoeconomic and environmental analysis of solar flat plate and evacuated tube collectors in cold climatic conditions," Renewable Energy, Elsevier, vol. 115(C), pages 501-508.
    2. Carlos J. Porras-Prieto & Susana Benedicto-Schönemann & Fernando R. Mazarrón & Rosa M. Benavente, 2016. "Profitability Variations of a Solar System with an Evacuated Tube Collector According to Schedules and Frequency of Hot Water Demand," Energies, MDPI, vol. 9(12), pages 1-15, December.
    3. Ayompe, L.M. & Duffy, A. & Mc Keever, M. & Conlon, M. & McCormack, S.J., 2011. "Comparative field performance study of flat plate and heat pipe evacuated tube collectors (ETCs) for domestic water heating systems in a temperate climate," Energy, Elsevier, vol. 36(5), pages 3370-3378.
    4. Gang Pei & Guiqiang Li & Xi Zhou & Jie Ji & Yuehong Su, 2012. "Comparative Experimental Analysis of the Thermal Performance of Evacuated Tube Solar Water Heater Systems With and Without a Mini-Compound Parabolic Concentrating (CPC) Reflector( C," Energies, MDPI, vol. 5(4), pages 1-14, April.
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