Comparison of the Utilization of 110 °C and 120 °C Heat Sources in a Geothermal Energy System Using Organic Rankine Cycle (ORC) with R245fa, R123, and Mixed-Ratio Fluids as Working Fluids

Abstract

Binary cycle experiment as one of the Organic Rankine Cycle (ORC) technologies has been known to provide an improved alternate scenario to utilize waste energy with low temperatures. As such, a binary geothermal power plant simulator was developed to demonstrate the geothermal energy potential in Dieng, Indonesia. To better understand the geothermal potential, the laboratory experiment to study the ORC heat source mechanism that can be set to operate at fixed temperatures of 110 • C and 120 • C is conducted. For further performance analysis, R245fa, R123, and mixed ratio working fluids with mass flow rate varied from 0.1 kg/s to 0.2 kg/s were introduced as key parameters in the study. Data from the simulator were measured and analyzed under steady-state condition with a 20 min interval per given mass flow rate. Results indicate that the ORC system has better thermodynamic performance when operating the heat source at 120 • C than those obtained from 110 • C. Moreover, the R123 fluid produces the highest ORC efficiency with values between 9.4% and 13.5%.

Analisis Perbandingan Respon Transfer Function Stirrer Tank Heater Dengan Variasi Fluida Menggunakan Simulink MATLAB

“…Aplikasi ilmu kontrol yang lebih komplek biasanya diterapkan di industri pembangkit [4,5] maupun skala laboratorium seperti yang dilakukan oleh Surindra et al [6,7]. Aplikasi dibidang perpindahan panas di heat exchanger sudah banyak dilakukan oleh Surindra [8][9][10][11][12] dalam penelitiannya di bidang ORC. Meskipun begitu pemodelan untuk memahami perpindahan panas dari sudut pandang control engineering masih sangat diperlukan untuk memberikan pemahaman didalam pembelajaran di bidang sistem pengaturan.…”

Investigation Study of Pressure Different Effect at Evaporator in Organic Rankine Cycle Simulator (ORCS) Using Low-grade Waste Heat

“…Efforts to obtain a working fluid according to the ORC system were carried out by mixing pure refrigerant R123 and R245fa. Surindra et al [9] have reported that they mix R123 and R245fa to operate the ORC system. R245fa 1:1 R123 (admixture R123 50% and 50% R245fa), R123 2:1 R245fa (admixture R123 66,6% and 33,3% R245fa) and R245fa 1:2 R123 (admixture R245fa 33,3% and 66,6% R123).…”

“…On the other hand, through research has just been published, Prasetyo et al [7] and Sarmiento [8] revealed R123 working fluid has been adopted to produce the highest ORC efficiency and environmental performance. Furthermore, in order to find alternative working fluid which appropriate with design challenge and complicated application, Surindra et al,2019 [9] established ORCS as simulator of Organic Rankine Cycle test bench with mixed-ratio of working fluid R123, and R245fa.…”

Special Issue: Modeling and Simulation of Energy Systems

“…Surindra, Caesarendra, Prasetyo, Mahlia, and Taufik [4] Organic Rankine cycles in geothermal energy systems.…”