1. Analytical calculation and numerical simulation verification for 100 kW hermetic turbine design of organic rankine cycle.
- Author
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Agustina, Lina, Wuwung, Vicky, Haq, Imaduddin, Ola, Kornelis Kopong, and Ismoyo, Budi
- Abstract
Organic Rankine Cycle (ORC) technology is promising to convert low enthalpy heat sources to electricity. The ORC system utilizes low enthalpy heat sources as the primary heat source to heat and evaporates secondary fluid, so-called working fluid, by using heat exchangers. Organic fluids like hydrocarbon fluids and refrigerants are used as the working fluid in the ORC system. This paper studied the application of the hermetic turbine in the ORC system. The system utilizes n-pentane as its working fluid. Because of its flammability, the turbine should be hermetically sealed to avoid leakage. The main objective of this study is to get the results of the numerical analysis of the 100 kW ORC hermetic turbine design. The design has been carried out and the geometry of a 2-stages turbine has been obtained. This design calculation is then validated by numerical simulation to obtain comparisons and corrections. From the results of this numerical simulation, there are differences in the properties and performance of the fluid per stage of the turbine. In general turbine performance, the CFD simulation with targeted pressure ratio has a smaller difference for -22.1% in power, 0.07% in pressure ratio, -0.26% in efficiency, and 17.05% in mass flow compared to the result of the CFD simulation based on targeted mass flow from the design analytical calculation. This difference indicates that the turbine geometry still need an improvement or optimization to achieve the design target of the analytical design calculation. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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