caa a22 4500 463170199 CHVBK 20180406164811.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10450-007-9054-0 doi (NATIONALLICENCE)springer-10.1007/s10450-007-9054-0 Hauer A. Bavarian Center for Applied Energy Research (ZAE Bayern), Walther-Meissner-Str. 6, 85748, Garching, Germany aut Evaluation of adsorbent materials for heat pump and thermal energy storage applications in open systems [Elektronische Daten] [A. Hauer] The evaluation of solid adsorbents in open sorption systems for heating, cooling and thermal energy storage (TES) applications is crucial for the ecological and economical performance of these systems. An appropriate adsorbent has to reach the temperature limit given by the heating/cooling system of the consumer. It has to provide high energy efficiency and a high energy density for storage applications. A method for an easy evaluation of different adsorbents for a specific application has been developed. The method is based on the adsorption equilibrium of the adsorbent and water vapor. The crucial property for the discussed field of applications is the differential heat of adsorption. Criteria for the evaluation of the adsorbent are the breakthrough curves (responsible for the dynamics of the process), the possible temperature lift (or the dehumidification) of the air, the thermal COP and the storage capacity. Springer Science+Business Media, LLC, 2007 Water vapor adsorption nationallicence Open sorption systems nationallicence Zeolite nationallicence Thermal energy storage nationallicence Desiccant cooling nationallicence Q des : desorption energy, kJ nationallicence Q cond : condensation energy, kJ nationallicence Q ads : adsorption energy, kJ nationallicence Q evap : evaporation energy, kJ nationallicence Δ H d : differential heat of adsorption, kJ/kg(adsorptive) nationallicence Δ H ads : integral heat of adsorption, kJ/kg(adsorbent) nationallicence T in : air temperature at inlet, °C nationallicence T out : air temperature at outlet, °C nationallicence x in : water content per mass of dry air, at inlet, g/kg nationallicence x out : water content per mass of dry air, at outlet, g/kg nationallicence C ads : water content of adsorbent, after adsorption, kg/kg nationallicence C des : water content of adsorbent, after desorption, kg/kg nationallicence c p,air : specific heat capacity of air, kJ/(kg⋅K) nationallicence c p,sorb : specific heat capacity of dry adsorbent, kJ/(kg⋅K) nationallicence c p,H2O : specific heat capacity of air, kJ/(kg⋅K) nationallicence Δ F : change in free energy upon adsorption, kJ nationallicence Δ S : change in entropy upon adsorption, kJ/K nationallicence L ( T ) : heat of evaporation of water, kJ/kg nationallicence ρ Q : energy storage density of adsorbent, MJ/m3 nationallicence m sorb : adsorbent mass, kg nationallicence V sorb : adsorbent volume, m3 nationallicence COPth : coefficient of performance (theoretical), - nationallicence COPuseable : coefficient of performance (application conditions), - nationallicence Adsorption Springer US; http://www.springer-ny.com 13/3-4(2007-08-01), 399-405 0929-5607 13:3-4<399 2007 13 10450 https://doi.org/10.1007/s10450-007-9054-0 text/html Onlinezugriff via DOI 1 review-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10450-007-9054-0 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Hauer A. Bavarian Center for Applied Energy Research (ZAE Bayern), Walther-Meissner-Str. 6, 85748, Garching, Germany aut NATIONALLICENCE 773 0- Adsorption Springer US; http://www.springer-ny.com 13/3-4(2007-08-01), 399-405 0929-5607 13:3-4<399 2007 13 10450 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer