Studying optimal generator temperature of single effect NH3-H2O absorption refrigeration machine for ice-making

2016 ◽  
Author(s):  
Nghia-Hieu Nguyen ◽  
Hiep-Chi Le ◽  
Quoc-An Hoang
Keyword(s):  
Absorption Refrigeration ◽  
Single Effect ◽  
Refrigeration Machine

Thermoeconomic Analysis of a Cogeneration System of Compression Ignition Engine and Absorption Refrigeration Machine

2002 ◽  
Author(s):  
Ricardo Wilson Cruz ◽  
Silvia Azucena Nebra
Keyword(s):  
Cold Storage ◽  
Second Law ◽  
Compression Ignition ◽  
Absorption Refrigeration ◽  
Absorption System ◽  
Compression Ignition Engine ◽  
Aqua Ammonia ◽  
Cogeneration System ◽  
Ammonia Absorption ◽  
Refrigeration Machine

This paper is a first attempt to evaluate a refrigeration with cogeneration system focusing on a 915 kW genset/90 ton aqua-ammonia absorption system capable of supplying refrigeration, e.g. for cold storage warehouses for food conservation in the Northern Brazilian autonomous grid. The first and second law joined formulation, i.e. exergy, is used in order to determine irreversibilities and to address the exergetic and monetary costs of the system.

scholarly journals Numerical study of a Solar Absorption Refrigeration Machine

2020 ◽  
Vol 150 ◽  
pp. 01009
Author(s):  
J. Dardouch ◽  
M. Charia ◽  
A. Bernatchou
Keyword(s):  
Distillation Column ◽  
Operating Temperature ◽  
Numerical Study ◽  
Heating System ◽  
Coefficient Of Performance ◽  
List Type ◽  
Absorption Refrigeration ◽  
Solar Collectors ◽  
Solar Absorption ◽  
Refrigeration Machine

In this paper, we present a numerical study of a single-stage absorption refrigeration machine, operating with a couple of water-ammonia fluids, equipped with a distillation column and associated with a solar heating system using solar collectors. The study has showed the benefit of using the distillation column which is manifested by: The decrease of the operating temperature, The improvement of the coefficient of performance, Surface reduction of the solar collectors, The improvement of the solar coefficient of performance. The solar study shows that the absorption refrigeration machine equipped with a distillation column is better suited to solar energy with significantly better performance compared to the simple absorption refrigeration machine.

scholarly journals COP enhancement and comparison of different absorption cooling systems

2020 ◽  
Vol 330 ◽  
pp. 01032
Author(s):  
Nihel Ben Zid ◽  
Nejib Hajji ◽  
Mohamed El Ganaoui
Keyword(s):  
Good Alternative ◽  
Absorption Refrigeration ◽  
Entrainment Ratio ◽  
Cooling Systems ◽  
Absorption Cooling ◽  
Flash Tank ◽  
Single Effect ◽  
Simulation Results ◽  
Absorption Cycle ◽  
Better Than

The absorption refrigeration machines represent a good alternative to compression refrigeration machines but the major problem of this type of refrigeration lies in the COP, which seems to be less efficient. Several researches are carried out to improve the performances of these machines such as the combination with the technology of the ejectors. In this work, we are interested in the three ammonia-water absorption cycles: Single effect absorption, Ejector-absorption and Combined ejector-flash tank absorption cycles. A gas-gas ejector would be installed between the generator and the condenser. We suppose that adding a flash tank between the condenser and the evaporator could help improve the entrainment ratio of the ejector. We used simulations in order to compare the performances of these three different cycles. The simulation results demonstrate that the combined ejector-flash tank absorption cycle performs better than others.

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