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M. Krajčík, L. Kudiváni, A. Mahdavi:
"Energy Saving Potential of Personalized Ventilation Applied in an Open Space Office under Winter Conditions";
Applied Mechanics and Materials, 861 (2017), 417 - 424.

Mixing and displacement air distribution are the main ventilation principles applied in
both residential and non-residential buildings. Recently, personalized ventilation when the fresh air
is delivered directly to the occupants at a high ventilation effectiveness has become an alternative.
Despite of this fact, little research has been carried out to quantify the energy saving potential of
personalized ventilation. This study aimed to quantify the effect of ventilation effectiveness and
control strategy on the energy performance and thermal comfort for an open plan office equipped by
different types of ventilation systems, including mixing ventilation with constant air volume,
demand control ventilation and personalized ventilation. A model was created in a program for
dynamic energy simulations TRNSYS, representing one floor of a typical office building divided
into four zones with different orientations and a core. Space heating and cooling were provided by
ceiling fancoil units recirculating the room air, thus the tasks of ventilation and air conditioning
were provided by two separate systems. The potential of personalized ventilation to save energy for
fans and for the heating coil of the ventilation system presented about 70% compared to constant air
volume mixing ventilation, however, the overall saving was only 20% when also the energy demand
for space heating was considered. The energy benefit of demand control ventilation and
personalized ventilation depends on the energy need for space heating and cooling, system
configuration and operation, and occupancy.

(no english version) Mixing and displacement air distribution are the main ventilation principles applied in
both residential and non-residential buildings. Recently, personalized ventilation when the fresh air
is delivered directly to the occupants at a high ventilation effectiveness has become an alternative.
Despite of this fact, little research has been carried out to quantify the energy saving potential of
personalized ventilation. This study aimed to quantify the effect of ventilation effectiveness and
control strategy on the energy performance and thermal comfort for an open plan office equipped by
different types of ventilation systems, including mixing ventilation with constant air volume,
demand control ventilation and personalized ventilation. A model was created in a program for
dynamic energy simulations TRNSYS, representing one floor of a typical office building divided
into four zones with different orientations and a core. Space heating and cooling were provided by
ceiling fancoil units recirculating the room air, thus the tasks of ventilation and air conditioning
were provided by two separate systems. The potential of personalized ventilation to save energy for
fans and for the heating coil of the ventilation system presented about 70% compared to constant air
volume mixing ventilation, however, the overall saving was only 20% when also the energy demand
for space heating was considered. The energy benefit of demand control ventilation and
personalized ventilation depends on the energy need for space heating and cooling, system
configuration and operation, and occupancy.

Computer Simulation, Ventilation, Office Building, Indoor Environment, Control Strategy