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Numerical Study on Indoor Environmental Quality in a Room Equipped with a Combined HRV and Radiator System

Author

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  • Aminhossein Jahanbin

    (Department of Industrial Engineering—DIN, Alma Mater Studiorum-University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy)

  • Giovanni Semprini

    (Department of Industrial Engineering—DIN, Alma Mater Studiorum-University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy)

Abstract

Heat recovery ventilation (HRV) systems can be integrated with an additional air heater in buildings with low energy demand in order to cover space heating demand. The employment of coupled HRV-heater systems is, therefore, gaining increasing interest for the improvement of the indoor environmental quality (IEQ), as well as the reduction of ventilation energy loss. The present paper analyses the efficacy of a HRV system, coupled with a low-temperature radiator, in satisfying the IEQ indices inside a retrofitted dormitory room. A computational fluid dynamic (CFD) model based on the finite volume method is established to investigate IEQ characteristics including indoor air quality and thermal comfort condition. The presented CFD code provides a practical tool for a comprehensive investigation of the IEQ indices in spaces employing a coupled HVAC system. In an analysis of indoor air quality, parameters such as age of the air, air change efficiency, and ventilation efficiency in removal of gaseous contaminants, namely VOCs and CO 2 , are evaluated. The results obtained by the numerical model allow addressing the interaction between HRV and radiator systems and its effects on airflow field. The results show the decrease of the indoor operative temperature with increment of the supply air flow rate, which is mainly due to the decreased thermal efficiency of the HRV system. The obtained results indicate that, while higher ventilation rates can significantly decrease the age of the air and gaseous contaminants level, at the same time, it would cause a local discomfort in some parts of the room.

Suggested Citation

  • Aminhossein Jahanbin & Giovanni Semprini, 2020. "Numerical Study on Indoor Environmental Quality in a Room Equipped with a Combined HRV and Radiator System," Sustainability, MDPI, vol. 12(24), pages 1-22, December.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:24:p:10576-:d:463959
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    References listed on IDEAS

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    1. Omer, Abdeen Mustafa, 2008. "Renewable building energy systems and passive human comfort solutions," Renewable and Sustainable Energy Reviews, Elsevier, vol. 12(6), pages 1562-1587, August.
    2. Giacomo Chiesa & Silvia Cesari & Miguel Garcia & Mohammad Issa & Shuyang Li, 2019. "Multisensor IoT Platform for Optimising IAQ Levels in Buildings through a Smart Ventilation System," Sustainability, MDPI, vol. 11(20), pages 1-28, October.
    3. Francesco Mancini & Fabio Nardecchia & Daniele Groppi & Francesco Ruperto & Carlo Romeo, 2020. "Indoor Environmental Quality Analysis for Optimizing Energy Consumptions Varying Air Ventilation Rates," Sustainability, MDPI, vol. 12(2), pages 1-18, January.
    4. Lexuan Zhong & Jing Yuan & Brian Fleck, 2019. "Indoor Environmental Quality Evaluation of Lecture Classrooms in an Institutional Building in a Cold Climate," Sustainability, MDPI, vol. 11(23), pages 1-16, November.
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    1. Guillermo Efren Ovando-Chacon & Abelardo Rodríguez-León & Sandy Luz Ovando-Chacon & Martín Hernández-Ordoñez & Mario Díaz-González & Felipe de Jesús Pozos-Texon, 2022. "Computational Study of Thermal Comfort and Reduction of CO 2 Levels inside a Classroom," IJERPH, MDPI, vol. 19(5), pages 1-22, March.

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