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International Conference on Innovative Applied Energy    

E-Proceedings ISBN: 978-1-912532-05-6

14-15 March 2019, Oxford, United Kingdom



Performance Analysis of a new Combined Organic Rankine Cycle and Vapor Compression Cogeneration and tri-generation and water desalination



Noureddine Toujani and Nahla Bouaziz

Université Tunis El Manar ,Unité de Recherche Energétique et Environnent, Ecole National d’ingénieur de Tunis, Tunisia


Paper Abstract

The new ORC-VCC combined system has been developed. It is an intelligent system that can operate in four modes depending on the type of energy.The novelty of our system appears essentially in: the development of new ORC-VCC combination architecture, the lowering of the ORC cycle temperature, the possibility of cold production by the ORC cycle upstream of the pumping phase, preheating of ORC cycle using VCC cycle fluid and new configurations based on the integration of heat recovery systems to improve overall system performance.  In addition, each installation mode has several configurations depending on the recovery points that will be integrated later, besides its adaptation to any energy source, where we can use biomass, solar and heat rejects of industry at low temperatures (60-130 ° C). This system could produce a negative and a positive cold. Although, thanks to its architecture, it is also characterized by many combination of selection  fluid for the ORC and VCC cycles it is not necessarily to have the same working fluid as the classic systems.In this study,Three configurations are examined and studied in terms of energy efficiency namely the performance of each configuration including net power, refrigeration capacity and overall efficiency, the thermal efficiency for ORC and the coefficient of performance for VCC. The used working fluids are N-Hexane for the ORC and R600 for the VCC. We also try to apply this new system to have the cogeneration with congelation temperatures.The results show that ,for cogeneration with negative cold, among the three configurations that we have developed, the cycle with recovery is preferable in which it has a better energy performance. For a hot spring of 1000 kW, this cycle can provide simultaneously, a maximum network of 17 KW and a maximum net cooling capacity of 160KW and an overall coefficient of the order of 0.3

Paper Keywords
Organic Rakine Cycle, Tri-generation , vapor compression cycle , desalination of sea water.
Corresponding author Biography

The International Conference on Innovative Applied Energy (IAPE’18)