Abstract
Due to global climate change and fossil fuel depletion, the rational use of thermal energy has attracted great research interest. Large differences between indoor and outdoor temperatures in cold regions results in huge amounts of heat waste and drop in indoor humidity. Ventireg, an adsorption method, has been often recommended for heat and humidity regeneration in cold countries. In this research work, VentireC, an advanced method employing two thermally coupled adsorbent beds is discussed. It allows the heat released during adsorption of moisture in one adsorber to be transferred to another adsorber to facilitate water desorption. The VentireC approach is comprehensively analysed and described in this paper. A composite adsorbent based on LiCl in silica gel pores, which can exchange up to 0.5 g-H2O/g-sorbent, is selected for VentireC processes under cold Western Siberia conditions. Mathematical simulation of humidity recuperation, employing the selected sorbent with and without thermal coupling, demonstrates the advantages of the VentireC process.
Highlights
Owing to enhanced living standards, heating and cooling (H/C) has become one of the biggest energy sectors, and is forecasted to remain so
The VentireC unit consists of two blocks of (DCHE + HS) beds, which operate in opposite modes (Figure 1b)
The dehumidification degree during the adsorption stage increases to 84%
Summary
Owing to enhanced living standards, heating and cooling (H/C) has become one of the biggest energy sectors, and is forecasted to remain so. Outdoor air passes in the opposite direction, extracts the stored heat and moisture, maintaining indoor temperature and humidity balance This approach reduces heat loss, avoids ice formation at the unit’s exit point, and humidifies the supplied air to ensure comfortable indoor conditions. The Ventireg is effective for regeneration of heat and moisture in ventilation systems [9], its performance is strongly restricted by (i) significant consumption of electric power for blowing of air through fixed Ad and HS beds, and (ii) increase in Ad bed temperature due to releasing of adsorption heat. Both these parameters reduce the efficiency of moisture and heat regeneration.
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