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

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...

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Published inEnergies (Basel) Vol. 17; no. 22; p. 5801
Main Author Koper, Piotr
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.11.2024
Subjects
Accuracy
Air flow
control
decentralised ventilation
Efficiency
Heat exchangers
Heat recovery
Heat recovery systems
Methods
Sensors
single duct
Thermocouples
Turbines
Ventilation
Working conditions
Poland
United States > US
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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.
AbstractList 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.
Audience Academic
Author Koper, Piotr
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StartPage 5801
SubjectTerms Accuracy
Air flow
control
decentralised ventilation
Efficiency
Heat exchangers
Heat recovery
Heat recovery systems
Methods
Sensors
single duct
Thermocouples
Turbines
Ventilation
Working conditions
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Title Influence of Control Strategy on Heat Recovery Efficiency in a Single-Duct Periodic Ventilation Device
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