Experimental Investigations of Composite Adsorbent 13X/CaCl2 on an Adsorption Cooling System

Abstract

Featured Application: The study is mainly used in areas where water is scarce, adsorbents adsorb water from the air, and are then desorbed.Abstract: A new experimental device which tests the adsorption performance of the 13X/CaCl 2 composite adsorbent under vacuum conditions was established. In this device, heat transfer characteristics in the adsorbent bed have a great influence on the adsorbent performance, the temperature of the bottom outside bed is very close to the temperature of the bottom inside bed and the temperature difference between them at the end of heating and cooling are 5.66 • C and 0.303 • C, respectively. The following conclusions could be drawn: the equilibrium water uptake of composite adsorbent CA10X (zeolite 13X impregnated with 10 wt % CaCl 2 solution) was increased 5.7% compared with that of 13X, and the water uptake was 0.37 g/g. The composite adsorbent CA10X has a better performance in the adsorption refrigeration system.

Steady-State Investigation of Carbon-Based Adsorbent–Adsorbate Pairs for Heat Transformation Application

“…Many studies have been conducted for pressurized adsorption systems employing these refrigerants, i.e., ethanol, methanol, R-134a and R-32, which have a lower triple point temperature to achieve a lower cooling temperature [27][28][29][30]. Concerning refrigerants, a lot of effort has been made towards the development of new adsorbent materials [31][32][33][34] and the study of their interactions with various refrigerants under a wide range of operating pressures. A good adsorbent must have [35,36] (i) a large adsorption uptake at a relatively low temperature, (ii) a lower specific heat capacity, (iii) an ability to desorb the refrigerant completely under desorption conditions, (iv) a high thermal conductivity, (v) less deterioration of adsorbent with time and (vi) a low cost.…”