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ICS solar systems with two water tanks

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  • Tripanagnostopoulos, Y.
  • Souliotis, M.

Abstract

Integrated collector storage (ICS) systems are compact solar water heaters, simple in construction, installation and operation. They are cheaper than flat plate thermosiphonic units, but their higher thermal losses make them suitable mainly for application in locations with favourable weather conditions. Aiming to the achievement of low system height and satisfactory water temperature stratification, new types of ICS systems with two horizontal cylindrical storage tanks, properly mounted in stationary CPC reflector troughs are suggested. The non-uniform distribution of solar radiation on the two absorbing surfaces is combined with the seasonal sun elevation, resulting to effective water heating. In addition, the inverted absorber concept design can be applied to ICS systems with two storage tanks. In this paper, we present the design and performance of double tank ICS solar systems, which are based on the combination of symmetric and asymmetric CPC reflectors with water storage tanks. The analytical equations of the collector geometry of all models are calculated with respect to the radius of the cylindrical water storage tank and the reflector rim angles. Experimental results for the variation of the water temperature inside storage tanks, the mean daily efficiency and the coefficient of thermal losses during night are given for all experimental models. The tests were performed without water draining and the results show that the double tank ICS systems are efficient in water temperature rise during day and satisfactory preservation of the hot water temperature during night, with the upper storage tank being more effective in performance in most of the studied models.

Suggested Citation

  • Tripanagnostopoulos, Y. & Souliotis, M., 2006. "ICS solar systems with two water tanks," Renewable Energy, Elsevier, vol. 31(11), pages 1698-1717.
    • Handle: RePEc:eee:renene:v:31:y:2006:i:11:p:1698-1717
    DOI: 10.1016/j.renene.2005.08.028
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    References listed on IDEAS

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    1. Prakash, J. & Garg, H.P. & Datta, G., 1983. "Effect of baffle plate on the performance of built-in storage type solar water heater," Energy, Elsevier, vol. 8(5), pages 381-387.
    2. Tripanagnostopoulos, Y. & Souliotis, M., 2004. "ICS solar systems with horizontal cylindrical storage tank and reflector of CPC or involute geometry," Renewable Energy, Elsevier, vol. 29(1), pages 13-38.
    3. Tripanagnostopoulos, Y. & Souliotis, M., 2004. "ICS solar systems with horizontal (E–W) and vertical (N–S) cylindrical water storage tank," Renewable Energy, Elsevier, vol. 29(1), pages 73-96.
    4. Kalogirou, Soteris A., 1999. "Performance enhancement of an integrated collector storage hot water system," Renewable Energy, Elsevier, vol. 16(1), pages 652-655.
    5. Tripanagnostopoulos, Y. & Souliotis, M. & Nousia, Th., 1999. "Solar ICS systems with two cylindrical storage tanks," Renewable Energy, Elsevier, vol. 16(1), pages 665-668.
    6. Tripanagnostopoulos, Y. & Souliotis, M., 2004. "Integrated collector storage solar systems with asymmetric CPC reflectors," Renewable Energy, Elsevier, vol. 29(2), pages 223-248.
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    Cited by:

    1. Evangelos Bellos & Dimitrios N. Korres & Christos Tzivanidis, 2023. "Investigation of a Compound Parabolic Collector with a Flat Glazing," Sustainability, MDPI, vol. 15(5), pages 1-17, February.
    2. Azzolin, Marco & Mariani, Andrea & Moro, Lorenzo & Tolotto, Andrea & Toninelli, Paolo & Del Col, Davide, 2018. "Mathematical model of a thermosyphon integrated storage solar collector," Renewable Energy, Elsevier, vol. 128(PA), pages 400-415.
    3. Kessentini, Hamdi & Bouden, Chiheb, 2013. "Numerical and experimental study of an integrated solar collector with CPC reflectors," Renewable Energy, Elsevier, vol. 57(C), pages 577-586.
    4. Souliotis, Manolis & Papaefthimiou, Spiros & Caouris, Yiannis G. & Zacharopoulos, Aggelos & Quinlan, Patrick & Smyth, Mervyn, 2017. "Integrated collector storage solar water heater under partial vacuum," Energy, Elsevier, vol. 139(C), pages 991-1002.
    5. Devanarayanan, K. & Kalidasa Murugavel, K., 2014. "Integrated collector storage solar water heater with compound parabolic concentrator – development and progress," Renewable and Sustainable Energy Reviews, Elsevier, vol. 39(C), pages 51-64.
    6. Singh, Ramkishore & Lazarus, Ian J. & Souliotis, Manolis, 2016. "Recent developments in integrated collector storage (ICS) solar water heaters: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 270-298.

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