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Advantages of variable driving temperature in solar absorption chiller

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  • Petela, Karolina
  • Manfrida, Giampaolo
  • Szlek, Andrzej

Abstract

The study described in this paper results from the observation that, when dealing with solar-driven absorption chillers, a compromise situation very likely exists between the collector efficiency and the coefficient of performance (COP) of the absorption cycle. An idea of a control strategy pursuing this objective, and thereby increasing the solar fraction for a solar absorption cooling cycle is consequently presented. The advantage of operating the solar chiller on a variable driving temperature is demonstrated. The theoretical analysis considers a solar chiller operated under moderate climate conditions of Poland. The model of the ammonia-water absorption chiller is described in detail, and the main assumptions of the iterative control procedure are explained. The effects of its application are computationally tested for one location and one type of solar collector, for representative days of three months during the cooling season. The results of the simulation are compared with the reference case of fixed driving temperature. According to the simulation results, it is possible to increase the cooling power yield at various levels, up to 34 W per 1 m2 of solar collector, by adjusting the chiller driving temperature throughout the cooling season. The same, it is possible to more than double the cooling effect for some hours, with respect to fixed-temperature control operation.

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  • Petela, Karolina & Manfrida, Giampaolo & Szlek, Andrzej, 2017. "Advantages of variable driving temperature in solar absorption chiller," Renewable Energy, Elsevier, vol. 114(PB), pages 716-724.
    • Handle: RePEc:eee:renene:v:114:y:2017:i:pb:p:716-724
    DOI: 10.1016/j.renene.2017.07.060
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    References listed on IDEAS

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    1. Al-Sulaiman, Fahad A. & Hamdullahpur, Feridun & Dincer, Ibrahim, 2012. "Performance assessment of a novel system using parabolic trough solar collectors for combined cooling, heating, and power production," Renewable Energy, Elsevier, vol. 48(C), pages 161-172.
    2. Eicker, Ursula & Pietruschka, Dirk & Haag, Maximilian & Schmitt, Andreas, 2015. "Systematic design and analysis of solar thermal cooling systems in different climates," Renewable Energy, Elsevier, vol. 80(C), pages 827-836.
    3. Shirazi, Ali & Taylor, Robert A. & White, Stephen D. & Morrison, Graham L., 2016. "Transient simulation and parametric study of solar-assisted heating and cooling absorption systems: An energetic, economic and environmental (3E) assessment," Renewable Energy, Elsevier, vol. 86(C), pages 955-971.
    4. Li, Z. F. & Sumathy, K., 2000. "Technology development in the solar absorption air-conditioning systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 4(3), pages 267-293, September.
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    Cited by:

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    2. Petela, Karolina & Szlek, Andrzej, 2019. "Energy and exergy analysis of solar heat driven chiller under wide system boundary conditions," Energy, Elsevier, vol. 168(C), pages 440-449.
    3. Toghyani, S. & Afshari, E. & Baniasadi, E. & Shadloo, M.S., 2019. "Energy and exergy analyses of a nanofluid based solar cooling and hydrogen production combined system," Renewable Energy, Elsevier, vol. 141(C), pages 1013-1025.
    4. Harkouss, Fatima & Fardoun, Farouk & Biwole, Pascal Henry, 2019. "Optimal design of renewable energy solution sets for net zero energy buildings," Energy, Elsevier, vol. 179(C), pages 1155-1175.
    5. Arabkoohsar, A. & Andresen, G.B., 2019. "Design and optimization of a novel system for trigeneration," Energy, Elsevier, vol. 168(C), pages 247-260.
    6. Kheir Abadi, Majid & Davoodi, Vajihe & Deymi-Dashtebayaz, Mahdi & Ebrahimi-Moghadam, Amir, 2023. "Determining the best scenario for providing electrical, cooling, and hot water consuming of a building with utilizing a novel wind/solar-based hybrid system," Energy, Elsevier, vol. 273(C).

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