Indigenous fruits and vegetables storage using continuous adsorption refrigeration: A system modelling

2021 ◽  
Author(s):  
Kolthoum Missaoui ◽  
Slimane Gabsi ◽  
Nader Frikha ◽  
Abdelhamid Kheiri ◽  
Mohammed El Ganaoui
Keyword(s):  
Fruits And Vegetables ◽  
System Modelling ◽  
Adsorption Refrigeration ◽  
Continuous Adsorption ◽  
Indigenous Fruits

scholarly journals Study and Analysis by Numerical Simulation of a Solar Continuous Adsorption Chiller

2015 ◽  
Vol 773-774 ◽  
pp. 605-609
Author(s):  
Rabah Gomri ◽  
Billel Mebarki
Keyword(s):  
Solar Energy ◽  
Cooling System ◽  
Recovery Process ◽  
Cooling Capacity ◽  
Coefficient Of Performance ◽  
Solar Collectors ◽  
Adsorption Refrigeration ◽  
Continuous Adsorption ◽  
Adsorption Cooling System ◽  
Mass Recovery

Environment and energy problems over the world have motivated researchers to develop energy systems more sustainable, having as one of the possible alternative the use of solar energy as source for cooling systems. Adsorption refrigeration systems are regarded as environmentally friendly alternatives to conventional vapour compression refrigeration systems, since they can use refrigerants that do not contribute to ozone layer depletion and global warming. In this paper a performance comparison between a solar continuous adsorption cooling system without mass recovery process and solar continuous adsorption cooling system with mass recovery process is carried out. Silica-Gel as adsorbent and water as refrigerant are selected. The results show that the adsorption refrigeration machine driven by solar energy can operate effectively during four months and is able to produce cold continuously along the 24 hours of the day. The importance of the mass recovery is proved in this study by increasing the coefficient of performance and the cooling capacity produced. For the same cooling capacity produced, the required number of solar collectors with mass recovery system is lower than the required number of solar collectors in the case of the refrigeration unit without mass recovery. For the same cooling capacity the system with mass recovery process allowed lower generation temperature.

Awareness and Utilisation of Indigenous Fruits and Vegetables in Selected Southern Africa Countries

2016 ◽  
Vol 3 (2) ◽  
pp. 133-138
Author(s):  
Malebogo Lekgoa ◽  
M. S. Nnyepi ◽  
Fiji Phuti ◽  
Tumelo Seru ◽  
Fungai. M. Mthombeni
Keyword(s):  
Southern Africa ◽  
Fruits And Vegetables ◽  
Indigenous Fruits

Performance Study of a Solar Adsorption Refrigeration System

2013 ◽  
Vol 860-863 ◽  
pp. 223-229
Author(s):  
Yan Ling Liu ◽  
Xue Zeng Shi
Keyword(s):  
Air Conditioning ◽  
Adsorption System ◽  
Refrigeration System ◽  
Performance Study ◽  
Adsorption Refrigeration ◽  
Air Conditioning System ◽  
Continuous Adsorption ◽  
Refrigerant Circuit ◽  
Simulation Results ◽  
Solar Powered

This paper presents the simulation of a solar-powered continuous adsorption air-conditioning system with the working pair of silica gel and water. In order to make the adsorption system more suitable to use solar energy to supply cooling continuously during daytime, a new adsorption system without refrigerant valves is being developed in SJTU recently. By using this system, the problem such as pressure drop along refrigerant circuit can be resolved. The frequent switches of refrigerant valves can also be omitted. The daytime long simulation results (ranging from 6:00 to 18:00) demonstrate that the solar-powered adsorption system can supply a fairly steady cooling output all the time. Based on the results, parametric study is also undertaken to optimize the design.

scholarly journals Modelling and simulation of a cold storage room driven by a continuous adsorption refrigerator

2020 ◽  
Vol 330 ◽  
pp. 01024
Author(s):  
Kolthoum Missaoui ◽  
Slimane Gabsi ◽  
Nader Frikha ◽  
Abdelhamid Kheiri ◽  
Mohammed El Ganaoui
Keyword(s):  
Cold Storage ◽  
Fruits And Vegetables ◽  
Adsorption Process ◽  
Coefficient Of Performance ◽  
Cooling Load ◽  
Continuous Adsorption ◽  
Storage Room ◽  
System Components ◽  
Maximum Coefficient ◽  
Process Heat

The present work proposes a continuous solar adsorption refrigerator for a positive cold storage room of 231 m3 used for fruits and vegetables preservation and installed in the south of Tunisia. After the estimation of the storage room cooling load, which is equal to 13 kW, a parametric study, aims to improve, the performance of the chiller is done in order to achieve the storage room need and to estimate the required heat in the refrigerator generator. A theoretical model, based on the thermodynamics of the adsorption process, heat and mass transfer within the porous medium and energy balance in the system components, is developed and a simulation with Matlab/Simulink, is carried out. The model was established and validated with the literature experimental data. A maximum coefficient of performance of 0.52 and cooling load of 22 kW are reached at cycle time of 800 seconds, the inlet temperatures of heating, cooling and chilled water are 85°C, 22°C and 15°C, respectively.

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