Energy-saving potential of dedicated outdoor-air system assisted by vacuum-based membrane dehumidifier

The proposed research presents a dedicated outdoor-air system (DOAS) integrated with a vacuumbased membrane dehumidifier (VMD). The primary objective of this study was to evaluate the energy-saving potential of the proposed VMD–DOAS combination. VMD–DOAS comprised a membrane-energy exchanger (MEE),...

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Bibliographic Details
Published in:E3S web of conferences 2019-01, Vol.111, p.1087
Main Authors: Cheon, Seong-Yong, Yoon, Soo-Yeol, Liu, Su, Jeong, Jae-Weon
Format: Article
Language:English
Subjects:
Air conditioners
Air temperature
Ceilings
Dehumidification
Energy
Energy conservation
Energy recovery
Enthalpy
Evaporative cooling
Radiant cooling
Sensible heat
Temperature requirements
Vacuum
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Summary:The proposed research presents a dedicated outdoor-air system (DOAS) integrated with a vacuumbased membrane dehumidifier (VMD). The primary objective of this study was to evaluate the energy-saving potential of the proposed VMD–DOAS combination. VMD–DOAS comprised a membrane-energy exchanger (MEE), dew-point indirect evaporative cooler (DP-IEC), and VMD. VMD possessed a characteristic by virtue of which the dehumidification process was isothermal; i.e., no temperature change was observed during the VMD process. While VMD served to control the dry-air supply, the required target temperature (i.e., 17 °C) was maintained via DP-IEC operation. The remaining sensible heat of the conditioned zone was controlled by the ceiling radiant cooling panel (CRCP). The load of the conditioned zone was driven by TRANSYS 18, and an engineering equation solver (EES) was used for evaluating the energy-saving potential of the proposed system with CRCP by comparing it against the variable-air-volume (VAV) system. Results of this study demonstrated that the proposed DOAS with CRCP consumed 37% less operating energy compared to the VAV system. This observed energy-saving potential of the proposed system was driven by reducing the dehumidification load and subsequent energy recovery by MEE.
ISSN:2267-1242
2555-0403
2267-1242
DOI:10.1051/e3sconf/201911101087