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A Qualitative Control Approach to Reduce Energy Costs of Hybrid Energy Systems: Utilizing Energy Price and Weather Data

Author

Listed:
  • Mehdi Taebnia

    (Department of Civil Engineering, School of Engineering, Aalto University, PO Box 12100, FI-00076 Aalto, Finland)

  • Marko Heikkilä

    (Sweco AB, Ilmalanportti 2, 00240 Helsinki, Finland)

  • Janne Mäkinen

    (FCG Finnish Consulting Group Oy, PO Box 950, 00601 Helsinki, Finland)

  • Jenni Kiukkonen-Kivioja

    (Sweco AB, Ilmalanportti 2, 00240 Helsinki, Finland)

  • Jouko Pakanen

    (Department of Civil Engineering, School of Engineering, Aalto University, PO Box 12100, FI-00076 Aalto, Finland)

  • Jarek Kurnitski

    (Department of Civil Engineering, School of Engineering, Aalto University, PO Box 12100, FI-00076 Aalto, Finland
    Department of Civil Engineering and Architecture, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia)

Abstract

Nowadays, many buildings are equipped with various energy sources. The challenge is how to efficiently utilize their energy production. This includes decreasing the share and costs of external energy—usually electrical energy delivered from the grid. The following study presents a qualitative approach with a combined control to solve the problem. The approach is demonstrated using a simulated residential building equipped with a hybrid energy system: a thermal energy storage combined with an electrical heater, a geothermal heat pump and a solar thermal collector. Consequently, the share of renewable energy was increased and, conversely, costs of the external energy from grid decreased by 12.2%. The results were based on a qualitative approach and the algorithm which predicts the need of energy of the building over the next 6 h with the aid of weather forecasting. This approach included a storage tank of 300 L. The energy costs can be further decreased 7.7% by increasing thermal storage capacity and modifying the control algorithm. In all cases, the indoor conditions were kept at a comfortable level. However, if the room temperature is temporarily allowed to slightly drop a few degrees during the heating season, the energy costs were further reduced.

Suggested Citation

  • Mehdi Taebnia & Marko Heikkilä & Janne Mäkinen & Jenni Kiukkonen-Kivioja & Jouko Pakanen & Jarek Kurnitski, 2020. "A Qualitative Control Approach to Reduce Energy Costs of Hybrid Energy Systems: Utilizing Energy Price and Weather Data," Energies, MDPI, vol. 13(6), pages 1-17, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:6:p:1401-:d:333502
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    References listed on IDEAS

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    1. Zhai, X.Q. & Qu, M. & Yu, X. & Yang, Y. & Wang, R.Z., 2011. "A review for the applications and integrated approaches of ground-coupled heat pump systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(6), pages 3133-3140, August.
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    Cited by:

    1. Juan Carlos Oviedo Cepeda & German Osma-Pinto & Robin Roche & Cesar Duarte & Javier Solano & Daniel Hissel, 2020. "Design of a Methodology to Evaluate the Impact of Demand-Side Management in the Planning of Isolated/Islanded Microgrids," Energies, MDPI, vol. 13(13), pages 1-24, July.
    2. Kumar Shivam & Jong-Chyuan Tzou & Shang-Chen Wu, 2020. "Multi-Objective Sizing Optimization of a Grid-Connected Solar–Wind Hybrid System Using Climate Classification: A Case Study of Four Locations in Southern Taiwan," Energies, MDPI, vol. 13(10), pages 1-30, May.

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