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Increasing Solar Energy Usage for Dwelling Heating, Using Solar Collectors and Medium Sized Vacuum Insulated Storage Tank

Author

Listed:
  • Janar Kalder

    (Institute of Technology, Estonian University of Life Sciences, Kreutzwaldi 56, EE51006 Tartu, Estonia)

  • Andres Annuk

    (Institute of Technology, Estonian University of Life Sciences, Kreutzwaldi 56, EE51006 Tartu, Estonia)

  • Alo Allik

    (Institute of Technology, Estonian University of Life Sciences, Kreutzwaldi 56, EE51006 Tartu, Estonia)

  • Eugen Kokin

    (Institute of Technology, Estonian University of Life Sciences, Kreutzwaldi 56, EE51006 Tartu, Estonia)

Abstract

This article describes a method for increasing the solar heat energy share in the heating of a dwelling. Solar irradiation is high in summer, in early autumn, and in spring, but during that same time, the heat demand of dwellings is low. This article describes a solution for storing solar heat energy in summertime as well as the calculations of the heat energy balance of such a storage system. The solar heat energy is stored in a thermally insulated water tank and used in the heating period. The heat is also stored in the ground if necessary, using the ground loop of the heat pump if the water tank’s temperature rises above a certain threshold. The stored heat energy is used directly for heating if the heat carrier temperature inside the tank is sufficient. If the temperature is too low for direct heating, then the heat pump can be used to extract the stored energy. The calculations are based on the solar irradiation measurements and heating demand data of a sample dwelling. The seasonal storing of solar heat energy can increase the solar heat energy usage and decrease the heat pump working time. The long-term storage tank capacity of 15 m 3 can increase the direct heating from solar by 41%. The direct heating system efficiency is 51%.

Suggested Citation

  • Janar Kalder & Andres Annuk & Alo Allik & Eugen Kokin, 2018. "Increasing Solar Energy Usage for Dwelling Heating, Using Solar Collectors and Medium Sized Vacuum Insulated Storage Tank," Energies, MDPI, vol. 11(7), pages 1-9, July.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:7:p:1832-:d:157677
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    References listed on IDEAS

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    1. Sharma, Atul & Tyagi, V.V. & Chen, C.R. & Buddhi, D., 2009. "Review on thermal energy storage with phase change materials and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(2), pages 318-345, February.
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    Cited by:

    1. Dimitris Al. Katsaprakakis & Georgios Zidianakis, 2019. "Optimized Dimensioning and Operation Automation for a Solar-Combi System for Indoor Space Heating. A Case Study for a School Building in Crete," Energies, MDPI, vol. 12(1), pages 1-21, January.
    2. Yudi Wang & Guoqiang Xu, 2022. "Numerical Simulation of Thermal Storage Performance of Different Concrete Floors," Sustainability, MDPI, vol. 14(19), pages 1-19, October.
    3. Dimitris Al. Katsaprakakis, 2020. "Computational Simulation and Dimensioning of Solar-Combi Systems for Large-Size Sports Facilities: A Case Study for the Pancretan Stadium, Crete, Greece," Energies, MDPI, vol. 13(9), pages 1-30, May.
    4. Dimitris Al. Katsaprakakis & Georgios Zidianakis & Yiannis Yiannakoudakis & Evaggelos Manioudakis & Irini Dakanali & Spyros Kanouras, 2020. "Working on Buildings’ Energy Performance Upgrade in Mediterranean Climate," Energies, MDPI, vol. 13(9), pages 1-28, May.
    5. Li, Simon & Berrio, Denering & Fang, Yanda, 2022. "Heat balance modelling and simulation of non-mixing buffer tank design for hydronic heating applications," Energy, Elsevier, vol. 244(PB).
    6. Amaya Martínez-Gracia & Sergio Usón & Mª Teresa Pintanel & Javier Uche & Ángel A. Bayod-Rújula & Alejandro Del Amo, 2021. "Exergy Assessment and Thermo-Economic Analysis of Hybrid Solar Systems with Seasonal Storage and Heat Pump Coupling in the Social Housing Sector in Zaragoza," Energies, MDPI, vol. 14(5), pages 1-32, February.
    7. David Vérez & Emiliano Borri & Alicia Crespo & Gabriel Zsembinszki & Belal Dawoud & Luisa F. Cabeza, 2021. "Experimental Study of a Small-Size Vacuum Insulated Water Tank for Building Applications," Sustainability, MDPI, vol. 13(10), pages 1-11, May.

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