Energy and exergy analysis of solar energy-integrated, geothermal energy-powered Organic Rankine Cycle

2019 ◽  
Vol 137 (2) ◽  
pp. 659-666 ◽  
Author(s):  
Merve Senturk Acar ◽  
Oguz Arslan
Keyword(s):  
Solar Energy ◽  
Geothermal Energy ◽  
Exergy Analysis ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis

scholarly journals Energy and Exergy Analysis of Combined Organic Rankine Cycle-Single and Dual Evaporator Vapor Compression Refrigeration Cycle

2019 ◽  
Vol 9 (23) ◽  
pp. 5028 ◽  
Author(s):  
Pektezel ◽  
Acar
Keyword(s):  
Exergy Analysis ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Refrigeration Cycle ◽  
Vapor Compression ◽  
Exergy Destruction ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Vapor Compression Refrigeration

This paper presents energy and exergy analysis of two vapor compression refrigeration cycles powered by organic Rankine cycle. Refrigeration cycle of combined system was designed with single and dual evaporators. R134a, R1234ze(E), R227ea, and R600a fluids were used as working fluids in combined systems. Influences of different parameters such as evaporator, condenser, boiler temperatures, and turbine and compressor isentropic efficiencies on COPsys and ƞex,sys were analyzed. Second law efficiency, degree of thermodynamic perfection, exergy destruction rate, and exergy destruction ratio were detected for each component in systems. R600a was determined as the most efficient working fluid for proposed systems. Both COPsys and ƞex,sys of combined ORC-single evaporator VCR cycle was detected to be higher than the system with dual evaporator.

Thermal Analysis of a Solar Powered ORC in Libya

2015 ◽  
Vol 789-790 ◽  
pp. 391-397
Author(s):  
Ratha Z. Mathkor ◽  
Brian Agnew ◽  
Mohammed A. Al-Weshahi ◽  
Saleh Etaig
Keyword(s):  
Exergy Analysis ◽  
Heat Engine ◽  
Organic Rankine Cycle ◽  
Weather Conditions ◽  
Rankine Cycle ◽  
Parabolic Trough ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Solar Powered ◽  
Exergy Losses

The paper presents a study of a thermal assessment of an Organic Rankine Cycle (ORC) energized by heat absorbed from a parabolic trough collector (PTC) located in Derna, Libya. Both the ORC and PTC are modeled using the IPSEpro software. The simulation results are used to evaluate the system performance using energy and exergy analysis. The study showed the PTC collector was the main contributor of the energy and exergy losses within the PTC system and the evaporator within in the ORC. At this specific weather conditions, the ORC was able to produce about 3 MW electrical powers from the powered PTC heat. Moreover, exergy efficiency of the PTC was 47.7 %, the heat engine was 23.3 % and for the overall system (PTC and ORC) was 11.1 %.

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