scholarly journals Performance of a 250 kW Organic Rankine Cycle System for Off-Design Heat Source Conditions

Energies ◽  
2014 ◽  
Vol 7 (6) ◽  
pp. 3684-3694 ◽  
Author(s):  
Ben-Ran Fu ◽  
Sung-Wei Hsu ◽  
Yuh-Ren Lee ◽  
Jui-Ching Hsieh ◽  
Chia-Ming Chang ◽  
...  
Keyword(s):  
Heat Source ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Cycle System

Selection of Working Fluids for Different Temperature Heat Source Organic Rankine Cycle

2012 ◽  
Vol 614-615 ◽  
pp. 195-199
Author(s):  
Guang Lin Liu ◽  
Jin Liang Xu ◽  
Bing Zhang
Keyword(s):  
Power Generation ◽  
Heat Source ◽  
Flue Gas ◽  
Thermal Power ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Source Power ◽  
Working Fluids ◽  
Cycle System ◽  
Temperature Heat

In the current paper, under the condition of different flue gas temperatures and constant flue gas thermal power, the influence of different organic working fluids on the efficiency of sub-critical organic Rankine cycle system were studied. The efficiency and other parameters of the simple system were calculated. The results show that the efficiency of sub-critical organic Rankine cycle system could reach maximum when the parameters of the working fluids in the expander inlet are dry-saturation. Flammability, toxicity, ozone depletion and other factors of the working fluids should be considered in the organic Rankine cycles. R245fa is considered a better choice for low-temperature heat source power generation, and the efficiency of the system is about 10.2%; for the high-temperature heat source, R601a can be considered; however, due to its high flammability, novel working fluids should be further discovered for power generation.

Analytical Study on Performance of a 250-kW Organic Rankine Cycle System under Off-Design Heat Source Temperatures by the Flow Rate Control Approach

2015 ◽  
Vol 764-765 ◽  
pp. 186-190
Author(s):  
Ben Ran Fu
Keyword(s):  
Heat Source ◽  
Flow Rate ◽  
Rate Control ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Control Approach ◽  
Cycle System ◽  
Flow Rate Control ◽  
Net Power Output

A 250-kW organic Rankine cycle system comprised of a preheater, evaporator, condenser, turbine, generator, and pump was used to study its off-design performance and operational control strategy by the flow rate control approach of the working fluid R245fa. The net power output was 243 kW, and the system thermal efficiency was 9.5% under design conditions. The analytical results demonstrated that the flow rate of the working fluid increased with increasing the heat source temperature (TW,in); higher TW,in yielded better heat transfer performance of the designed preheater as well as a higher requirement for the evaporator’s heat capacity; and the net power output increased linearly with increasing TW,in.

scholarly journals Experimental Investigation of a 560 Watt Organic Rankine Cycle System using R134a as Working Fluid and Plat Solar Collector as Heat Source

2021 ◽  
Vol 4 (3) ◽  
pp. 169-172
Author(s):  
Awaludin Martin ◽  
Muhammad Nur
Keyword(s):  
Energy Source ◽  
Solar Energy ◽  
Heat Source ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Maximum Efficiency ◽  
Working Fluid ◽  
Energy Sources ◽  
Small Scale ◽  
Cycle System

New and renewable energy sources such as solar, geothermal, and waste heat  are energy sources that can be used as a source of energy for Organic Rankine cycle system because the organic Rankine cycle (ORC) requires heat at low temperatures to be used as energy source. The experimental of Organic Rankine Cycle (ORC) systems with solar energy as a heat source was conduct to investigate a small-scale ORC system with R134a as a working fluid by varying the heat source at temperature 75⁰C-95⁰C. The experiment resulted a maximum efficiency, power of system is 4.30%, and 185.9 Watt, where the temperature of heat source is 95⁰C, the pressure and temperature of steam inlet turbine is 1.38 MPa and 67.9oC respectively. Solar energy as the main energy source in the ORC system can reduce energy use up to 49.9% or 4080.8 kJ where the temperature of the water as the heat source in the evaporator is 51°C.

Design and testing of a 340 kW Organic Rankine Cycle system for Low Pressure Saturated Steam heat source

Energy ◽  
2020 ◽  
Vol 210 ◽  
pp. 118380
Author(s):  
Dabiao Wang ◽  
Xiaoye Dai ◽  
Zhihua Wu ◽  
Wu Zhao ◽  
Puwei Wang ◽  
...  
Keyword(s):  
Heat Source ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Low Pressure ◽  
Saturated Steam ◽  
Cycle System ◽  
Design And Testing ◽  
Steam Heat

scholarly journals Experimental study of Organic Rankine cycle system by using R141b as working fluid

2020 ◽  
Vol 8 (1) ◽  
pp. 21-30
Author(s):  
Aya H.A .Kareem Kareem ◽  
Ali A. F. Al-Hamadan
Keyword(s):  
Experimental Study ◽  
Heat Source ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Operating Conditions ◽  
Hot Water ◽  
Working Fluid ◽  
Inlet Temperature ◽  
Cycle System ◽  
Energy And Exergy Analysis

Organic Rankine cycle (ORC) is one of the renewable energy to generate power at low temperatures; however, the thermal and physical properties data of the working fluid in this system are limited. In this regards, the experimental study by using R-141b as the working fluid and hot water (i.e. 50°C and 90°C) on the ORC system was conducted in order to evaluate the ORC performance via changing temperatures. Further, the air compressor was modified to act as a multi-vane expander in the ORC system. Energy and exergy analysis of ORC system was done by using Engineering Equation Solver (EES) program. It was found that the performance of the expander is acceptable and suitable for operating conditions. In addition, the heat source temperature has a direct effect on expander performance. The higher temperatures of the heat source led to an increase the expander inlet temperature. This system satisfied maximum thermal and exergy efficiency and they found equal to 1.8 % and 21%, respectively. Moreover, the rotation speed and power of expander are equal to 1200 RPM and 2.331 kW respectively. It was concluded that the working fluid R-141b is suitable for ORC system due to consider the working fluid that do not need high temperatures to evaporate.

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