scholarly journals Investigation of a Solar Thermal Driven Refrigerated Warehouse in Tripoli-Libya using TRNSYS

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Mukhtar BenAbeid
Keyword(s):  
High Performance ◽  
Freezing Point ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Absorption Chiller ◽  
Load Model ◽  
Solar Fraction ◽  
Evacuated Tubes ◽  
Absorption Refrigeration System ◽  
Solar Powered

This paper, illustrates a design and simulation of a solar powered absorption refrigeration system preserves food above freezing point. The main system is modified from a commercial conventional system located at Tajoura, Libya. The target is to design and operate the system at high solar fraction and efficiency. The simulation is performed by TRNSYS to evaluate the annual thermal performance of the solar system that consists of 50-kW absorption chiller producing cold for three refrigerated rooms. The model could be classified into two main parts; refrigeration load model and solar powered refrigeration system model. The results demonstrated that the optimum system achieves 51% solar fraction consists of 48 m2 of high performance evacuated tubes solar collectors and 5000-litre thermal storage tank, in order to power a 50-kW absorption chiller that offers cold for three refrigerated rooms of vegetables.

scholarly journals Electrical conductivity of concentrated LiBr Ethylene-Glycol and water ternary system

2021 ◽  
Vol 2116 (1) ◽  
pp. 012069
Author(s):  
J Zheng ◽  
J Chiva ◽  
J Castro ◽  
Y Liu ◽  
A Oliva
Keyword(s):  
Electrical Conductivity ◽  
Ethylene Glycol ◽  
Empirical Relation ◽  
Experimental Result ◽  
Absorption Refrigeration ◽  
Mass Ratio ◽  
Refrigeration System ◽  
Absorption Chiller ◽  
Simple Method ◽  
Absorption Refrigeration System

Abstract LiBr/H2O as working pair in absorption chiller is widely used in the absorption refrigeration system, and the electrical conductivity is used as secondary properties as an empirical relation with temperature and concentration as a simple method to measure the concentration. In this paper, another working pair Carrol/H2O is chosen, more suitable for air-cooled cycles. Carrol contains ethylene glycol and LiBr with a mass ratio at 4.5:1 and has advantages of low risk of crystallization and reduce the LiBr charge. The working range for the LiBr/H2O solution is temperature 25-80°C, at concentration 50–64%, in term of Carrol/H2O system, the temperature range is 25-80°C, concentration range is 50%-75%. The electrical conductivity will be measured according to the working range and a typical used solution extracted from an absorption chiller prototype will also be measured to compare with the experimental result.

Performance analysis of solar powered absorption refrigeration system

2009 ◽  
Vol 46 (2) ◽  
pp. 137-145 ◽  
Author(s):  
Suleiman Qaseem Abu-Ein ◽  
Sayel M. Fayyad ◽  
Waleed Momani ◽  
Mamdouh Al-Bousoul
Keyword(s):  
Performance Analysis ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Absorption Refrigeration System ◽  
Solar Powered
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