Energy storage comparison of sorption systems for cooling and refrigeration

Generation of Nanopores during Desorption of NH3 from Mg(NH3)6Cl2

“…Metal ammine complexes have been known for more than a century, but they still turn out to have new and interesting properties. Recently, they have, for example, been considered for separation of NH 3 from low-pressure ammonia plants and as sorption systems for refrigeration. , The latest suggestion is to use them as solid hydrogen storage materials . Metal ammine complexes, such as Mg(NH 3 ) 6 Cl 2 , can store 9.1% hydrogen in the form of NH 3 , which is relatively high compared to most solid hydrogen storage materials currently studied. , Hydrogen can be obtained by combining the metal ammines with an NH 3 decomposition catalyst. − …”

Universal relation between the boundary temperatures of a basic cycle of sorption heat machines

“…For pairs "water--SWS-1L (CaCl 2 /silica)'', "water--SWS-1A (CaCl 2 /alumina)'' and "water--SWS-2L (LiBr/silica)'' T 2cal is systematically smaller that T 2ex but the difference is minor (0.3--2.4 • C, Table 6). For water--silica Fuji RD (Table 1), methanol--TA90 (Table 3), methanol--CBV 901 Y (Table 6) and ethanol--ACF (Table 4) almost ideal agreement between T 2cal Table 1 Water--silica gel Fuji Davison RD Te, Table 2 Ammonia--carbon PX21 (MaxSorb) (Mugnier and Goetz, 2001) Table 3 Methanol--AC35 (Douss and Meunier, 1988) Te, Table 4 Ethanol--ACF (Saha et al, 2007) Te, Table 5 Water--zeolite 4A (Simonot-Grange and Hannouni, 1984) and T 2ex was observed. Thus, Eq.…”

“…Here we inspect the applicability of Trouton's rule for working pairs which are most commonly considered for AHMs: water--silica gel , water--zeolite 13X (Simonot-Grange and Hannouni, 1984), water--zeolite 4A (Gorbach et al, 2004), water--selective water sorbents (Gordeeva et al, 1998;Aristov et al, 2002), CO 2 --carbon (Goetz and Guillot, 2001), methanol--carbons (AC-35, TA90) (Douss and Meunier, 1988), methanol--hydrophobic zeolite CBV 901 Y (Tchernev, 1999), ethanol--ACF (Saha et al, 2007) and ammonia--carbon PX31 (Mugnier and Goetz, 2001). We found that for all the working pairs considered (except water--zeolite 4A) Trouton's rule is valid, at least, in terms of validity of Eq.…”

Chemical and adsorption heat pumps: Comments on the second law efficiency

“…For preliminary estimation we can consider for COP the value that is average between those given by Eqs. (11) and (12), namely, for cooling…”

“…(14) can be applied for simple estimation of the COP c for real 3T cycles of AHPs. We analyzed the accuracy of this estimation for various working pairs [11,12] with methanol, ammonia and water as adsorbates (Table 2). Regardless the nature of adsorbent and adsorbate, the COP calculated by Eq.…”