Optimization and Analyzing of Subcritical Organic Rankine Cycle Using R1234ze(E) for Low and Medium Temperature Heat Source

To match for the different temperature of the geothermal resource and strengthen the flexibility of organic Rankine cycle, a variable capacity power generation superstructure based on flash and organic Rankine cycle for geothermal energy was proposed. A combined flash-binary experimental prototype is newly established to investigate thermodynamic performance both on system and equipment in this paper. Pressured hot water is adopted as the extensive worldwide existed hydrothermal geothermal resource, eliminating the influence of the used heat transfer oil on evaporating process. The experimental results show that there is an optimal mass-flow rate of R245fa under the condition of different heat source temperature. Flash and binary power subsystem dominate the flash-binary power system, respectively, when the heat source temperature is 120? and 130?. The isotropic efficiency of modified compressor just between 0.2 and 0.25. The power output of per ton geofluid are 0.78 kWh/t and 1.31 kWh/t, respectively, when the heat source temperature are 120? and 130?. These results will predict the operation data of flash-binary power plant driven by the low-medium temperature geothermal water for construction in western of China.

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Investigation on a small-scale pumpless Organic Rankine Cycle (ORC) system driven by the low temperature heat source

Applied Energy ◽

10.1016/j.apenergy.2017.03.082 ◽

2017 ◽

Vol 195 ◽

pp. 478-486 ◽

Cited By ~ 25

Author(s):

L. Jiang ◽

H.T. Lu ◽

L.W. Wang ◽

P. Gao ◽

F.Q. Zhu ◽

...

Keyword(s):

Low Temperature ◽

Heat Source ◽

Organic Rankine Cycle ◽

Rankine Cycle ◽

Small Scale ◽

Temperature Heat

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Energetic and exergetic assessment of a two-stage Organic Rankine Cycle with reactivity controlled compression ignition engine as a low temperature heat source

Energy Conversion and Management ◽

10.1016/j.enconman.2018.04.019 ◽

2018 ◽

Vol 166 ◽

pp. 215-232 ◽

Cited By ~ 6

Author(s):

Mehdi Mansoury ◽

Samad Jafarmadar ◽

Sharam Khalilarya

Keyword(s):

Low Temperature ◽

Heat Source ◽

Organic Rankine Cycle ◽

Rankine Cycle ◽

Compression Ignition ◽

Compression Ignition Engine ◽

Two Stage ◽

Reactivity Controlled Compression Ignition ◽

Temperature Heat

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Thermodynamic and economic optimization of a double-pressure organic Rankine cycle driven by low-temperature heat source

Renewable Energy ◽

10.1016/j.renene.2018.11.093 ◽

2020 ◽

Vol 147 ◽

pp. 2822-2832 ◽

Cited By ~ 13

Author(s):

Qingxuan Sun ◽

Yaxiong Wang ◽

Ziyang Cheng ◽

Jiangfeng Wang ◽

Pan Zhao ◽

...

Keyword(s):

Low Temperature ◽

Heat Source ◽

Organic Rankine Cycle ◽

Rankine Cycle ◽

Economic Optimization ◽

Temperature Heat

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.614-615.195 ◽

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.

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