Performance Study and Advantages of a Novel Activated Carbon Adsorption Cycle Run by Sunlight
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RESEARCH ARTICLE–PHYSICS
Performance Study and Advantages of a Novel Activated Carbon Adsorption Cycle Run by Sunlight Mohammed Ali Hadj Ammar1 · Boubaker Benhaoua2 · Khelifa Salhi3 Received: 2 August 2020 / Accepted: 26 October 2020 © King Fahd University of Petroleum & Minerals 2020
Abstract Adsorption cycle can produce cooling generation efficiently by exploiting sunlight. The study aims to analyze the performance and advantages of the adsorption cycle run by sunlight working with a novel activated carbon. The latter is CarboTech A35/1. A new model equation of the cycle is based on the adsorption thermodynamic at a constant temperature. For the proposed study, a simulation program was developed to solve the model equation predicting the best cycle performance. The main obtained results were validated with simulated and experimental data and revealed considerable concordance. The study showed that, under a typical operating temperature, the best coefficient of performance and the produced ice were 0.778 and 13.87 kg, respectively. Also, those results indicate that the produced ice is improved by reducing the temperature water inside a water tank. In comparison with the non-solar refrigeration cycle, the advantages of the novel one, concerning the daily saving electricity and avoiding penalty tax for CO2 emissions, were 25.42 kWh and 1.13 e, respectively. Keywords Adsorption cycle · Refrigeration · Advantages · CarboTech A35/1 · Performance
List of Symbols
Greek Letters
C Cp Q L m T P m R qSt
m Cycled mass of the methanol (kg/kg) ρ Density (kg/m3 )
B
Specific heat (J/kg K) Specific heat at constant pressure (J/kg K) Heat energy (kJ) Latent heat (J/kg) Adsorbed mass (kg/kg) Temperature (°C) Pressure (Pa) Mass (kg) Gas constant (J/mol K) Isosteric heat of adsorption/desorption (kJ/kg)
Mohammed Ali Hadj Ammar [email protected]
1
Department of Physic, Hamma Lakhdar University, P. O. Box 789, 39000 El-Oued, Algeria
2
Unité de Développement des Energies Renouvelabledans dans les Zones Arides (UDERZA), El-Oued, Algeria
3
Centre de Développement des Energies Renouvelables (CDER), BP. 62, Route de, l‘Observatoire, Bouzaréah, 16340 Algiers, Algeria
Subscripts l tube amb ad Con ev s min max ice fus cycle
Liquid Tube Ambient Adsorbent Condensation Evaporation Saturation Minimum Maximum Ice Fusion Cycle
Abbreviations SAR Solar adsorption refrigeration
123
Arabian Journal for Science and Engineering
COP Coefficient of performance AC Activated carbon Toe Tonne of oil equivalent
1 Introduction The non-solar refrigeration cycles utilize electricity so as to power its traditional mechanical vapor compressor. Therefore, they have high electricity consumption costs and use CFCs and HCFCs refrigerants which are responsible for greenhouse gas emissions [1–3]. Recently, the adsorption refrigeration cycle exploiting sunlight has attracted an increasing attention because of the use of natural refrigerants (methanol, ammonia, and water). The solar adsorption refrigeration (SAR) cycle seems to be a promi
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