Design and experimental study of a small-sized organic Rankine cycle system under various cooling conditions

This paper experimentally studies the performance and feature of a kW-scale organic Rankine cycle system which was operated under various cooling conditions using R123 as working fluid. A self-designed radial inflow turbine was applied to this system in order to testing its performance. A test of th...

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Bibliographic Details
Published in:Energy (Oxford) 2017-07, Vol.130, p.236-245
Main Authors: Shao, Long, Ma, Xinling, Wei, Xinli, Hou, Zhonglan, Meng, Xiangrui
Format: Article
Language:English
Subjects:
Cooling
Cooling condition
Cooling rate
Cooling systems
Cooling water
Electric power generation
Energy efficiency
Evaporation
Exergy
Flow rates
Flow velocity
Fluid flow
Heat recovery systems
Inflow
Mass flow rate
Organic Rankine cycle
Radial inflow turbine
Rankine cycle
Thermal efficiency
Thermodynamic efficiency
Thermodynamics
Turbines
Water flow
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Summary:This paper experimentally studies the performance and feature of a kW-scale organic Rankine cycle system which was operated under various cooling conditions using R123 as working fluid. A self-designed radial inflow turbine was applied to this system in order to testing its performance. A test of the power generation system under various cooling conditions was conducted. The system performance and turbine operational state are distinctly influenced by the cooling water mass flow rate. The experiment results show the turbine performances for various rotational speeds, isentropic efficiencies, and thermal efficiencies. The maximum thermal efficiency 5.30% and a turbine isentropic efficiency 75.2% can be obtained with a water flow rate of 0.591 kg/s. The system net power increased from 889.47 W to 1242.67, with the flow rate of water increasing. With the increase of water flow rate, the exergy loss of evaporator increased, and those of condenser and turbine decreased. •A small radial inflow turbine is self-designed and the test bench is set up.•Effects of cooling water flow rate on the performance parameters are studied.•Correlativity between water flow rate and operating parameters is studied.•The performance of the turbine increases with the cooling water flow increasing.
ISSN:0360-5442
1873-6785
DOI:10.1016/j.energy.2017.04.092