Influence of Control Strategy on Heat Recovery Efficiency in a Single-Duct Periodic Ventilation Device

Piotr Koper ()
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Piotr Koper: Faculty of Energy and Environmental Engineering, Silesian University of Technology, 44-100 Gliwice, Poland

Energies, 2024, vol. 17, issue 22, 1-14

Abstract: The subject of the research was a single-duct, decentralised periodic ventilation unit, using accumulative heat exchanger for heat recovery (also called single-core fixed-bed regenerator). It can achieve high efficiency of heat recovery but is vulnerable to pressure differences between the interior of the building and the outside. To counter this, two control strategies were proposed: adjustment of the fan speed based on an air flow sensor and adjustment of the working cycle length based on temperature sensors. The strategies were tested experimentally in actual working conditions. Due to the use of cheap and simple sensors, it was possible to retain the low price of the device. Both control strategies proved to be successful in equalising the amount of supplied and removed air in a single cycle. Moreover, the heat recovery efficiency increased by more than 10% compared to the default working mode.

Keywords: ventilation; control; heat recovery; single duct; decentralised ventilation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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