Modeling the performance of two-bed, sillica gel-water adsorption chillers

The electro-adsorption chiller: a miniaturized cooling cycle with applications to micro-electronics

“…The multi-sorption-bed configuration in such a modular assembly would actually improve the quality of cooling since swings in T evap would be moderated significantly [6]. For micro-electronic cooling applications, compared to existing solutions, the electro-adsorption chiller can offer significantly lower temperatures at elevated efficiency (COP).…”

“…The equations adopted here for the time-dependent behavior of the chiller components and their mutual interactions have been derived and validated in previous studies (a) thermoelectric behavior, in [3] (b) adsorption and desorption, in [6] (c) heat exchanger dynamics, in [6], and are summarized in the Appendix and Table 1. We have solved the complete set of coupled energy and mass transfer equations numerically to yield predictions of the key performance variables of the electro-adsorption chiller, as well as their sensitivity to several practical controls.…”

“…Adsorption chillers [6] (Fig. 2) might appear to offer an additional option, because adsorption and desorption are primarily surface, rather than bulk, processes.…”

“…where subscript f denotes the fluid phase; superscript refr denotes refrigerant; the temperature dependence of the refrigerant's (water's) specific heat is accounted for; and the overflow control is zero when the heat-exchange surface area on the vapor side of the condenser is saturated with condensate while dq des /dt 40, and unity otherwise [6]. Since the pressures and temperatures change in tandem, the adsorbent-adsorbate system follows an isosteric thermodynamic path.…”

“…Since the pressures and temperatures change in tandem, the adsorbent-adsorbate system follows an isosteric thermodynamic path. For the evaporator [6] …”