Simulation aided development of a façade-integrated air handling unit with a thermoelectric heat exchanger

Authors

  • Vojtech Zavřel University Centre for Energy Efficient Buildings | CTU Prague | Czech Republic
  • Petr Zelenský University Centre for Energy Efficient Buildings | CTU Prague | Czech Republic
  • Jordi Macia Thermal Energy and Building Performance Group | IREC – Catalonia Institute for Energy Research | Spain
  • Angelos Mylonas Thermal Energy and Building Performance Group | IREC – Catalonia Institute for Energy Research | Spain
  • Jordi Pascual Thermal Energy and Building Performance Group | IREC – Catalonia Institute for Energy Research | Spain

DOI:

https://doi.org/10.34641/clima.2022.207

Keywords:

PLURAL, local ventilation, façade unit, thermoelectric cell, design, simulation, TRNSYS

Abstract

The paper presents a simulation aided development of a new type of a façade-integrated air handling unit for local ventilation of rooms. The unit is developed as a part of the Plug-and-Use (PnU) concept within the H2020 project PLURAL. Unlike conventional local ventilation units designed solely for ventilation, the developed air handling unit has a two-stage heat recovery that combines a passive and an active heat exchanger. The active heat exchanger consists of an array of thermoelectric elements and provides the flexible and energy efficient capability of temperature control of supplied ventilation air. The paper demonstrates the practical use of building energy simulations for the development of the unit. A combined simulation approach was used, while the IDA ICE software addressed the indoor CO2 concentration and related ventilation volume flow rates used for the TRNSYS software, which predicted energy performance and indoor thermal conditions. In the TRNSYS, a numerical representing the initial prototype of the air handling unit was prepared. This sub-model was integrated into the TRNSYS building model of the real installation demo site, namely, the Terrassa building, Barcelona, Spain. A variant numerical analysis was performed with two different compositions of the building envelope (pre- and post-renovation) and several ventilation control strategies and air handling unit operation settings. The performed simulations were capable to predict the performance of the innovative device in the real-case arrangement, under various scenarios, on the scale of the entire building. The simulation analysis demonstrated that the façade integrated air handling unit can clearly improve the IAQ conditions and reduce the overheating in the case when no other cooling system is available. The simulations provided an important navigation for the design team to further develop the innovative device.

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Published

2022-05-16

How to Cite

Zavřel, V. ., Zelenský, P. ., Macia, J. ., Mylonas, A. ., & Pascual, J. . (2022). Simulation aided development of a façade-integrated air handling unit with a thermoelectric heat exchanger. CLIMA 2022 Conference. https://doi.org/10.34641/clima.2022.207