Year 2019, Volume 6 , Issue 2, Pages 31 - 38 2019-09-16

Thermal efficiency evaluation of an organic Rankine cycle with n-pentane as working fluid

Sadık Ata [1] , Ali Kahraman [2] , Remzi Şahin [3]


In this study, the effect of evaporation pressure and superheating temperature on system performance was determined in the Organic Rankine Cycle (ORC) model designed using n-pentane fluid. EES (Engineering Equation Solver) software design using 9 different conditions have been identified. In the first model where the evaporation pressure was between 250 kPa and 400 kPa, the efficiency of ORC was determined under five different constant superheating temperatures. In the second model, the evaporation pressure was determined as 4 different constant values and the temperature of the superheating temperature was changed between 0 oC and 20 oC. N-pentane, which is widely used in ORC geothermal applications, has been determined as working fluid. Within the scope of geothermal applications, the heat source temperature is assumed to be constant at 120 °C. Condenser pinch point temperature difference is taken as 3 oC. As a result of the study, the data obtained from two different models were evaluated separately. When the superheating temperature is not applied, turbine work increases by 35% as the evaporation pressure rises from 250 kPa to 400 kPa. In addition, thermal efficiency also increased by 26%. When the evaporation pressure is constant at 250 kPa, the turbine work increased by 7.32% due to the increase of the superheating temperature from 0 oC to 20 oC. However, with the increase of heat input, thermal efficiency decreased by 1.38%. In the ORC system using N-pentane, it is stated that application of the superheating temperature reduces the performance. In the study, the highest thermal efficiency (12.59%) was achieved at the evaporation pressure of 400 kPa in the case of not applying superheating. The main purpose of this study was to evaluate the thermal efficiency of n-pentane fluid used in the geothermal applications of ORC under different evaporation pressure and overheating temperatures.

Organic Rankine Cycle (ORC), Thermal Efficiency, superheating, n-pentane
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Primary Language en
Subjects Engineering, Mechanical
Journal Section Research Article
Authors

Author: Sadık Ata (Primary Author)
Institution: KTO KARATAY ÜNİVERSİTESİ, MÜHENDİSLİK FAKÜLTESİ
Country: Turkey


Author: Ali Kahraman
Institution: NECMETTİN ERBAKAN ÜNİVERSİTESİ, MÜHENDİSLİK VE MİMARLIK FAKÜLTESİ
Country: Turkey


Author: Remzi Şahin
Institution: KTO KARATAY ÜNİVERSİTESİ, MÜHENDİSLİK FAKÜLTESİ
Country: Turkey


Dates

Publication Date : September 16, 2019

Bibtex @research article { ijeat444464, journal = {International Journal of Energy Applications and Technologies}, issn = {}, eissn = {2548-060X}, address = {editor.ijeat@gmail.com}, publisher = {İlker ÖRS}, year = {2019}, volume = {6}, pages = {31 - 38}, doi = {10.31593/ijeat.444464}, title = {Thermal efficiency evaluation of an organic Rankine cycle with n-pentane as working fluid}, key = {cite}, author = {Ata, Sadık and Kahraman, Ali and Şahin, Remzi} }
APA Ata, S , Kahraman, A , Şahin, R . (2019). Thermal efficiency evaluation of an organic Rankine cycle with n-pentane as working fluid. International Journal of Energy Applications and Technologies , 6 (2) , 31-38 . DOI: 10.31593/ijeat.444464
MLA Ata, S , Kahraman, A , Şahin, R . "Thermal efficiency evaluation of an organic Rankine cycle with n-pentane as working fluid". International Journal of Energy Applications and Technologies 6 (2019 ): 31-38 <https://dergipark.org.tr/en/pub/ijeat/issue/48772/444464>
Chicago Ata, S , Kahraman, A , Şahin, R . "Thermal efficiency evaluation of an organic Rankine cycle with n-pentane as working fluid". International Journal of Energy Applications and Technologies 6 (2019 ): 31-38
RIS TY - JOUR T1 - Thermal efficiency evaluation of an organic Rankine cycle with n-pentane as working fluid AU - Sadık Ata , Ali Kahraman , Remzi Şahin Y1 - 2019 PY - 2019 N1 - doi: 10.31593/ijeat.444464 DO - 10.31593/ijeat.444464 T2 - International Journal of Energy Applications and Technologies JF - Journal JO - JOR SP - 31 EP - 38 VL - 6 IS - 2 SN - -2548-060X M3 - doi: 10.31593/ijeat.444464 UR - https://doi.org/10.31593/ijeat.444464 Y2 - 2019 ER -
EndNote %0 International Journal of Energy Applications and Technologies Thermal efficiency evaluation of an organic Rankine cycle with n-pentane as working fluid %A Sadık Ata , Ali Kahraman , Remzi Şahin %T Thermal efficiency evaluation of an organic Rankine cycle with n-pentane as working fluid %D 2019 %J International Journal of Energy Applications and Technologies %P -2548-060X %V 6 %N 2 %R doi: 10.31593/ijeat.444464 %U 10.31593/ijeat.444464
ISNAD Ata, Sadık , Kahraman, Ali , Şahin, Remzi . "Thermal efficiency evaluation of an organic Rankine cycle with n-pentane as working fluid". International Journal of Energy Applications and Technologies 6 / 2 (September 2019): 31-38 . https://doi.org/10.31593/ijeat.444464
AMA Ata S , Kahraman A , Şahin R . Thermal efficiency evaluation of an organic Rankine cycle with n-pentane as working fluid. IJEAT. 2019; 6(2): 31-38.
Vancouver Ata S , Kahraman A , Şahin R . Thermal efficiency evaluation of an organic Rankine cycle with n-pentane as working fluid. International Journal of Energy Applications and Technologies. 2019; 6(2): 38-31.