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A new version of the large pressure jump (T-LPJ) method for dynamic study of pressure-initiated adsorptive cycles for heat storage and transformation

Tokarev, M.M., Zlobin, A.A., Aristov, Yu.I.
Energy 2019 v.179 pp. 542-548
adsorbents, adsorption, desorption, heat, heat exchangers, lithium chloride, methanol, prototypes, silica, temperature
In this work, a new version of the Large Pressure Jump (LPJ) method was proposed for studying the ad/desorption dynamics on representative pieces of a real “adsorber - heat exchanger” (AdHEx) for adsorptive heat storage and transformation (AHST). The core of the new approach is a direct measurement of the temperature difference ΔT of a heat carrier at the inlet and outlet of the tested AdHEx fragment. This difference is caused by a jump/drop of the adsorptive pressure which has initiated adsorption/desorption process. The measurements are carried out for the working pair “methanol - composite LiCl/silica” under typical conditions of a new cycle “Heat from Cold” (HeCol).The new Thermal Large Pressure Jump (T-LPJ) method is advanced as compared with the common V-LPJ version as it provides useful information on the heat exchanged between the adsorbent bed and the heat carrier fluid. Such information is not available from the V-LPJ method. The T-LPJ is simple in realization and resembles the common procedure for dynamic evaluation of real pressure-initiated AHST units. The suggested method was verified by comparison with results previously reported for a HeCol prototype with the same adsorbent and cycle boundary conditions.