Novel adsorption method for moisture and heat recuperation in ventilation: Composites “LiCl/matrix” tailored for cold climate

Alexandr Shkatulov; Larisa G. Gordeeva; Ilya S. Girnik; Henk Huinink; Yuri I. Aristov

doi:10.1016/j.energy.2020.117595

Novel adsorption method for moisture and heat recuperation in ventilation: Composites “LiCl/matrix” tailored for cold climate

Alexandr Shkatulov, Larisa G. Gordeeva (Corresponding author), Ilya S. Girnik, Henk Huinink, Yuri I. Aristov

Research output: Contribution to journal › Article › Academic › peer-review

19 Citations (Scopus)

Abstract

Nowadays, advanced technologies for rational use of energy in dwellings have aroused a considerable interest. In cold countries huge amounts of heat and moisture are wasted through the air infiltration due to the large difference between indoor and outdoor temperatures. In this work, an advanced adsorption approach to heat and moisture recuperation in ventilation, called VentireC, is suggested. In this approach, the moisture and sensible heat from outgoing air are absorbed on the adsorbent and heat storing beds and then withdrawn into the inflowing outdoor air, thus, maintaining the indoor temperature and humidity balance. Thermal coupling between two adsorbent beds, which work out of phase, allows latent and sensible loads to be managed separately to enhance the humidity recuperation. For harmonizing the adsorbent properties with the operating conditions of the VentireC process, the requirements for optimal sorbents are formulated based on the thermodynamic analysis of the process. New sorbents based on LiCl incorporated in four matrices with the various mesoporous structure are synthesized and investigated. The water sorption/desorption equilibrium for the most promising sorbent is reported. This composite exchanges over 0.5 g-H₂O/g under a typical VentireC cycle, which is promising for effective heat and moisture regeneration.

Original language	English
Article number	117595
Number of pages	10
Journal	Energy
Volume	201
DOIs	https://doi.org/10.1016/j.energy.2020.117595
Publication status	Published - 15 Jun 2020

Funding

The Russian authors thank the Russian Foundation for Basic Researches (project no. 19-53-53007 GFEN-a ) for partial financial support of this work. This work was conducted within the framework of budget project AAAA-A17- 117041110045-9 of the Boreskov Institute of Catalysis. The authors from the Netherlands thank the Dutch TKI Urban Energy program (project Cap4Heat, #1407201 ) for financial support. All the authors thank Sasol Germany GmbH for providing the alumina samples.

Funders	Funder number
Boreskov Institute of Catalysis
Sasol Germany GmbH
Russian Foundation for Basic Research	1407201, AAAA-A17- 117041110045-9, 19-53-53007 GFEN-a

Keywords

Adsorption
Composite sorbents “LiCl/Matrix”
Heat and moisture recuperation
Ventilation

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10.1016/j.energy.2020.117595

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abstract = "Nowadays, advanced technologies for rational use of energy in dwellings have aroused a considerable interest. In cold countries huge amounts of heat and moisture are wasted through the air infiltration due to the large difference between indoor and outdoor temperatures. In this work, an advanced adsorption approach to heat and moisture recuperation in ventilation, called VentireC, is suggested. In this approach, the moisture and sensible heat from outgoing air are absorbed on the adsorbent and heat storing beds and then withdrawn into the inflowing outdoor air, thus, maintaining the indoor temperature and humidity balance. Thermal coupling between two adsorbent beds, which work out of phase, allows latent and sensible loads to be managed separately to enhance the humidity recuperation. For harmonizing the adsorbent properties with the operating conditions of the VentireC process, the requirements for optimal sorbents are formulated based on the thermodynamic analysis of the process. New sorbents based on LiCl incorporated in four matrices with the various mesoporous structure are synthesized and investigated. The water sorption/desorption equilibrium for the most promising sorbent is reported. This composite exchanges over 0.5 g-H2O/g under a typical VentireC cycle, which is promising for effective heat and moisture regeneration.",

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AB - Nowadays, advanced technologies for rational use of energy in dwellings have aroused a considerable interest. In cold countries huge amounts of heat and moisture are wasted through the air infiltration due to the large difference between indoor and outdoor temperatures. In this work, an advanced adsorption approach to heat and moisture recuperation in ventilation, called VentireC, is suggested. In this approach, the moisture and sensible heat from outgoing air are absorbed on the adsorbent and heat storing beds and then withdrawn into the inflowing outdoor air, thus, maintaining the indoor temperature and humidity balance. Thermal coupling between two adsorbent beds, which work out of phase, allows latent and sensible loads to be managed separately to enhance the humidity recuperation. For harmonizing the adsorbent properties with the operating conditions of the VentireC process, the requirements for optimal sorbents are formulated based on the thermodynamic analysis of the process. New sorbents based on LiCl incorporated in four matrices with the various mesoporous structure are synthesized and investigated. The water sorption/desorption equilibrium for the most promising sorbent is reported. This composite exchanges over 0.5 g-H2O/g under a typical VentireC cycle, which is promising for effective heat and moisture regeneration.

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Novel adsorption method for moisture and heat recuperation in ventilation: Composites “LiCl/matrix” tailored for cold climate

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