Use Co- and Ni-free Air Electrode In Solid Oxide Cell Manufacturing For Electrolysis And Fuel Cell Applications

Composite materials for solid sorption heat pumps: Measurements, model calculations and consequences for system performance

The performance of adsorption heat pumps is strongly related to the properties of the used sorbents. Not only the pressure temperature relations that determine the operating window but also the heat and mass transfer properties, which determine cycling time and hence power density, are of great importance. The use of composite materials, such as...

Separating Azeotropes using Light and Nanoparticles

The azeotrope ethanol/water could not be broken by the use of nano-particles that are heated by light. Several insufficiently quantified parameters hampered exact mimicking of a reported breaking of the same azeotrope in the open literature. Normal rectification was observed which might also be the case in the aforementioned reported experiment....

Model calculations of a hybrid adsorption compression heat transformer

Design of a Hybrid Adsorption Compression System: Experimental Results and Model Calculations

Hybrid adsorption compression heat pump cycles can be applied to upgrade waste heat to process heat temperatures. Model calculations show a power density of 25 kW m-3 can be achieved with a COP on heat of 0.3. By optimizing reactor dimensions, cycle times and by introducing heat and mass recovery options, it is expected this performance can be...

Composite materials for solid sorption heat pumps: Measurements, model calculations and consequences for system performance

Experimental Setup for Determining Ammonia-Salt Adsorption and Desorption Behavior Under Typical Heat Pump Conditions: Experimental Results

For the aim of obtaining a better understanding of the performance of a salt-ammonia sorption reactor/heat exchanger a new test-rig was developed. This test-rig enables the measurement of the performance in adsorption and desorption mode of different sorption reactor designs. It measures the speed of uptake and release of ammonia gas of various...

Experimental Results and Model Calculations of a Hybrid Adsorption-Compression Heat Pump Based on a Roots Compressor and Silica Gel-Water Sorption

Thermally driven sorption systems can provide significant energy savings, especially in industrial applications. The driving temperature for operation of such systems limits the operating window and can be a barrier for market-introduction. By adding a compressor, the sorption cycle can be run using lower waste heat temperatures. ECN has...

Study of the reversible water vapour sorption process of MgSO4.7H2O and MgCl2.6H2O under the conditions of seasonal solar heat storage

dx.doi.org/10.1088/1742-6596/395/1/012069

Experimental results and model calculations of a hybrid adsorption-compression heat pump based on a roots compressor and silica gel-water sorption

Thermally driven sorption systems can provide significant energy savings, especially in industrial applications. The driving temperature for operation of such systems limits the operating window and can be a barrier for market-introduction. By adding a compressor, the sorption cycle can be run using lower waste heat temperatures. <p&amp...

Experimental setup for determining ammonia-salt adsorption and desorption behavior under typical heat pump conditions: A description of the setup and experimental results

Heat-driven heat pumps based on the principle of chemisorption have been researched worldwide. Such research typically focuses either on fundamental materials properties such as sorption isotherms, thermal conductivity and heat of sorption, or on the development and performance of complete systems. Also at ECN the research shows this typical...

Measurement results of a hybrid adsorption-compression heat pump based on a roots compressor and silica gel-water sorption cycle

Thermally driven sorption systems can provide significant energy savings, especially in industrial applications. The driving temperature for operation of such systems limits the operating window and can be a barrier for market-introduction. By adding a work-driven compressor, the heat-driven cycle can be made with waste heat at lower...

Thermodynamic properties of lithium chloride ammonia complexes under heat pump type II working conditions

Heat pumps type II can be used for upgrading industrial waste heat to above pinch temperatures, with a typical lift from 130oC to 180oC. At ECN such a heat pump is developed based on the reaction of ammonia with lithium chloride and magnesium chloride as respectively the low and high temperature salt. The thermodynamic properties of these salts...

Thermally driven ammonia-salt type II heat pump: development and test of a prototype

ECN developed together with Bronswerk Heat Transfer Inc. a thermally driven prototype heat pump that uses ammonia adsorption/desorption on the salts LiCl and MgCl2 for respectively low and high temperature reactor. Measurements on this prototype have been conducted to determine its peak power production, its achievable temperature lift and...

Method for determining effect of kinetics and heat-transfer on the adsorption rate of ammonia on LiCl

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Solid/vapour sorption heat transformer: Design and performance

A high temperature high lift solid sorption based heat transformer has been successfully designed and tested. The sorption reactor concept is based on a tube-fin heat exchanger where the heat exchanging fluids can flow through the hollow fins. The plates were brazed together with porous metal foam that was impregnated with either of the sorbents...

Haalbaarheidsonderzoek: ontwikkeling van een ethanolsensor t.b.v. opslag van fruit

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