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Experimental Validation of the Simulation Model of a DOAS Equipped with a Desiccant Wheel and a Vapor Compression Refrigeration System

Author

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  • Pedro J. Martínez

    (Departamento de Ingeniería Mecánica y Energía, Universidad Miguel Hernández, Avda. de la, Universidad, s/n, 03202 Elche, Spain)

  • Carlos Llorca

    (Departamento de Ingeniería Mecánica y Energía, Universidad Miguel Hernández, Avda. de la, Universidad, s/n, 03202 Elche, Spain)

  • José A. Pla

    (Departamento de Ingeniería Mecánica y Energía, Universidad Miguel Hernández, Avda. de la, Universidad, s/n, 03202 Elche, Spain)

  • Pedro Martínez

    (Departamento de Ingeniería Mecánica y Energía, Universidad Miguel Hernández, Avda. de la, Universidad, s/n, 03202 Elche, Spain)

Abstract

A dedicated outdoor air system (DOAS) can be designed to supply 100% of the outside air and meet the latent load of the room with dry air. The objectives of this study were to develop a model of a DOAS equipped with a desiccant wheel and a vapor-compression refrigeration system, build a prototype, validate the model with experimental data, and gain knowledge about the system operation. The test facility was designed with the desiccant wheel downstream of the cooling coil to take advantage of the operating principles of cooling coils and desiccants. A model of the DOAS was developed in the TRNSYS environment. The root mean standard error (RMSE) was used for model validation by comparing the measured air and refrigerant properties with the corresponding calculated values. The results obtained with the developed model showed that the DOAS was able to maintain an indoor humidity ratio depending on outdoor conditions. Laboratory tests were also used to investigate the effect of changes in the regeneration air temperature and the process airflow rate on the process air humidity ratio at the outlet of the wheel. The results are consistent with the technical literature.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:9:p:1330-:d:110807
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    References listed on IDEAS

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    1. Panaras, G. & Mathioulakis, E. & Belessiotis, V. & Kyriakis, N., 2010. "Theoretical and experimental investigation of the performance of a desiccant air-conditioning system," Renewable Energy, Elsevier, vol. 35(7), pages 1368-1375.
    2. 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.
    3. Beccali, Marco & Finocchiaro, Pietro & Nocke, Bettina, 2012. "Energy performance evaluation of a demo solar desiccant cooling system with heat recovery for the regeneration of the adsorption material," Renewable Energy, Elsevier, vol. 44(C), pages 40-52.
    4. 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.
    5. Ruivo, Celestino R. & Angrisani, Giovanni & Minichiello, Francesco, 2015. "Influence of the rotation speed on the effectiveness parameters of a desiccant wheel: An assessment using experimental data and manufacturer software," Renewable Energy, Elsevier, vol. 76(C), pages 484-493.
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    Cited by:

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    2. 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.

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    Keywords

    DOAS; desiccant wheel; TRNSYS;
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