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Performance Assessment of a Solar-Assisted Desiccant-Based Air Handling Unit Considering Different Scenarios

Author

Listed:
  • Giovanni Angrisani

    (Department of Engineering, University of Sannio, Piazza Roma 21, Benevento 82100, Italy)

  • Carlo Roselli

    (Department of Engineering, University of Sannio, Piazza Roma 21, Benevento 82100, Italy)

  • Maurizio Sasso

    (Department of Engineering, University of Sannio, Piazza Roma 21, Benevento 82100, Italy)

  • Francesco Tariello

    (Department of Engineering, University of Sannio, Piazza Roma 21, Benevento 82100, Italy)

  • Giuseppe Peter Vanoli

    (Department of Engineering, University of Sannio, Piazza Roma 21, Benevento 82100, Italy)

Abstract

In this paper, three alternative layouts (scenarios) of an innovative solar-assisted hybrid desiccant-based air handling unit (AHU) are investigated through dynamic simulations. Performance is evaluated with respect to a reference system and compared to those of the innovative plant without modifications. For each scenario, different collector types, surfaces and tilt angles are considered. The effect of the solar thermal energy surplus exploitation for other low-temperature uses is also investigated. The first alternative scenario consists of the recovery of the heat rejected by the condenser of the chiller to pre-heat the regeneration air. The second scenario considers the pre-heating of regeneration air with the warmer regeneration air exiting the desiccant wheel (DW). The last scenario provides pre-cooling of the process air before entering the DW. Results reveal that the plants with evacuated solar collectors (SC) can ensure primary energy savings (15%–24%) and avoid equivalent CO 2 emissions (14%–22%), about 10 percentage points more than those with flat-plate collectors, when the solar thermal energy is used only for air conditioning and the collectors have the best tilt angle. If all of the solar thermal energy is considered, the best results with evacuated tube collectors are approximately 73% in terms of primary energy saving, 71% in terms of avoided equivalent CO 2 emissions and a payback period of six years.

Suggested Citation

  • Giovanni Angrisani & Carlo Roselli & Maurizio Sasso & Francesco Tariello & Giuseppe Peter Vanoli, 2016. "Performance Assessment of a Solar-Assisted Desiccant-Based Air Handling Unit Considering Different Scenarios," Energies, MDPI, vol. 9(9), pages 1-24, September.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:9:p:724-:d:77740
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    References listed on IDEAS

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    Cited by:

    1. Shuo Liu & Chang-Ho Jeong & Myoung-Souk Yeo, 2020. "Effect of Evaporator Position on Heat Pump Assisted Solid Desiccant Cooling Systems," Energies, MDPI, vol. 13(22), pages 1-21, November.
    2. Gao, D.C. & Sun, Y.J. & Ma, Z. & Ren, H., 2021. "A review on integration and design of desiccant air-conditioning systems for overall performance improvements," Renewable and Sustainable Energy Reviews, Elsevier, vol. 141(C).
    3. Yunlong Ma & Suvash C. Saha & Wendy Miller & Lisa Guan, 2017. "Comparison of Different Solar-Assisted Air Conditioning Systems for Australian Office Buildings," Energies, MDPI, vol. 10(10), pages 1-27, September.
    4. Saedpanah, Ehsan & Pasdarshahri, Hadi, 2021. "Performance assessment of hybrid desiccant air conditioning systems: A dynamic approach towards achieving optimum 3E solution across the lifespan," Energy, Elsevier, vol. 234(C).
    5. Chen, Liu & Tan, Yikun, 2020. "The performance of a desiccant wheel air conditioning system with high-temperature chilled water from natural cold source," Renewable Energy, Elsevier, vol. 146(C), pages 2142-2157.
    6. Piero Bareschino & Francesco Pepe & Carlo Roselli & Maurizio Sasso & Francesco Tariello, 2019. "Desiccant-Based Air Handling Unit Alternatively Equipped with Three Hygroscopic Materials and Driven by Solar Energy," Energies, MDPI, vol. 12(8), pages 1-20, April.
    7. Yunlong Ma & Suvash C. Saha & Wendy Miller & Lisa Guan, 2017. "Parametric Analysis of Design Parameter Effects on the Performance of a Solar Desiccant Evaporative Cooling System in Brisbane, Australia," Energies, MDPI, vol. 10(7), pages 1-22, June.
    8. Pedro J. Martínez & Carlos Llorca & José A. Pla & Pedro Martínez, 2017. "Experimental Validation of the Simulation Model of a DOAS Equipped with a Desiccant Wheel and a Vapor Compression Refrigeration System," Energies, MDPI, vol. 10(9), pages 1-15, September.

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