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Assessing the Energy-Saving Potential of a Dish-Stirling Con-Centrator Integrated Into Energy Plants in the Tertiary Sector

Author

Listed:
  • Stefania Guarino

    (Department of Engineering, University of Palermo, 90133 Palermo, Italy)

  • Pietro Catrini

    (Department of Engineering, University of Palermo, 90133 Palermo, Italy)

  • Alessandro Buscemi

    (Department of Engineering, University of Palermo, 90133 Palermo, Italy)

  • Valerio Lo Brano

    (Department of Engineering, University of Palermo, 90133 Palermo, Italy)

  • Antonio Piacentino

    (Department of Engineering, University of Palermo, 90133 Palermo, Italy)

Abstract

Energy consumed for air conditioning in residential and tertiary sectors accounts for a large share of global use. To reduce the environmental impacts burdening the covering of such demands, the adoption of renewable energy technologies is increasing. In this regard, this paper evaluates the energy and environmental benefits achievable by integrating a dish-Stirling concentrator into energy systems used for meeting the air conditioning demand of an office building. Two typical reference energy plants are assumed: (i) a natural gas boiler for heating purposes and air-cooled chillers for the cooling periods, and (ii) a reversible heat pump for both heating and cooling. For both systems, a dish-Stirling concentrator is assumed to operate first in electric-mode and then in a cogenerative-mode. Detailed models are adopted for plant components and implemented in the TRNSYS environment. Results show that when the concentrator is operating in electric-mode the electricity purchased from the grid decreases by about 72% for the first plant, and 65% for the second plant. Similar reductions are obtained for CO 2 emissions. Even better performance may be achieved in the case of the cogenerative-mode. In the first plant, the decrease in natural gas consumption is about 85%. In the second plant, 66.7% is the percentage increase in avoided electricity purchase. The integration of the dish-Stirling system allows promising energy-saving and reduction in CO 2 emissions. However, both a reduction in capital cost and financial support are needed to encourage the diffusion of this technology.

Suggested Citation

  • Stefania Guarino & Pietro Catrini & Alessandro Buscemi & Valerio Lo Brano & Antonio Piacentino, 2021. "Assessing the Energy-Saving Potential of a Dish-Stirling Con-Centrator Integrated Into Energy Plants in the Tertiary Sector," Energies, MDPI, vol. 14(4), pages 1-23, February.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:4:p:1163-:d:503740
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