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Selection of organic Rankine cycle working fluids in the low-temperature waste heat utilization

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Abstract

In the current study, simulations based on the engineering equation solver (EES) software are performed to determine the suitable working fluid for the simple organic Rankine cycle system in different temperature ranges. Under the condition of various temperatures and a constant thermal power of the flue gas, the influence of different organic working fluids on the efficiency of the subcritical organic Rankine cycle power generation system is studied, and its efficiency and other parameters are compared with those of the regenerator system. It is shown that the efficiency of the subcritical organic Rankine cycle system is the best when the parameters of the working fluid in the expander inlet are in the saturation state. And for the organic Rankine cycle, the R245fa is better than other working fluids and the efficiency of the system reaches up to 10.2% when the flammability, the toxicity, the ozone depletion, the greenhouse effect and other factors of the working fluids are considered. The R601a working fluid can be used for the high-temperature heat source, however, because of its high flammability, new working fluid should be investigated. Under the same condition, the efficiency of the organic Rankine cycle power generation system with an internal heat exchanger is higher than that of the simple system without the internal heat exchanger, but the efficiency is related to the properties of the working fluid and the temperature of the heat source.

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Authors and Affiliations

  1. School of Energy and Power Engineering, Shandong University, Jinan, 250061, China

    Dian-xun Li  (李殿勋), Shu-sheng Zhang  (张树生) & Gui-hua Wang  (王桂华)

  2. School of Reronautics, Shandong Jiaotong University, Jinan, 250357, China

    Shu-sheng Zhang  (张树生)

Authors
  1. Dian-xun Li  (李殿勋)
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  2. Shu-sheng Zhang  (张树生)
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  3. Gui-hua Wang  (王桂华)
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Corresponding author

Correspondence to Shu-sheng Zhang  (张树生).

Additional information

Biography: LI Dian-xun (1974-), Male, Ph. D. Candidate

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Li, Dx., Zhang, Ss. & Wang, Gh. Selection of organic Rankine cycle working fluids in the low-temperature waste heat utilization. J Hydrodyn 27, 458–464 (2015). https://doi.org/10.1016/S1001-6058(15)60504-2

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  • DOI: https://doi.org/10.1016/S1001-6058(15)60504-2

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