Performance Analysis of Near-Critical and Subcritical Organic Rankine Cycle

Abstract:

In this paper, three typical working fluids were selected for the near-critical ORC and subcritical ORC. The difference of performance between the near-critical ORC and subcritical ORC was analyzed by establishing the thermodynamic model. The reason for difference was analyzed in terms of the thermophysical properties. The results indicate that the performance of the near-critical ORC is better than the subcritical ORC. The net absorbed heat, net power and efficiency of the near-critical ORC vary slowly with the vapor generation temperature, which means that the near-critical ORC has good off-design performance. The dry working fluid R236fa is best adapted for the near-critical ORC among the three working fluids. The singular performance of the near-critical ORC depends on the properties of latent heat and type of working fluid in near-critical region.

• Periodical: Applied Mechanics and Materials (Volumes 448-453)
• Pages: 3270-3276
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.448-453.3270
• Online since: October 2013
• Authors: Yu Ping Wang*, Yi Wu Weng, Ping Yang, Lei Tang
• Keywords: Low Temperature Heat Source, Near-Critical, Organic Rankine Cycle (ORC), Organic Working Fluid, Subcritical

References

[1] W. Gu, Y.W. Weng, Y.Z. Wang, B. Zheng: J. Power and Energy, Pro. IMechE Part A. Vol. 223(2009), p.523.

[2] W. Gu, S.Q. Sun, Y.W. Weng, Y.Z. Wang: Proceeding of the CSEE. Vol. 31(2011), p.20(In Chinese).

[3] L. Jing, P. Gang, J. Jie. 2010: Applied Energy. Vol. 87(2010), p.3355.

[4] H.J. Chen, D.Y. Goswami, M.M. Rahman, E.K. Stefanakos: Energy. Vol. 36(2011), p.49.

[5] E. Sauret, A.S. Rowlands: Energy. Vol. 36(2011), p.4460.

[6] W. Gu, Y.W. Weng Y.Z. Wang: Acta Energiae Solaris Sinica. Vol. 32(2011), p.662 (In Chinese).

[7] X.J. Zhou, Z.W. Lian, Z.H. Li, Y. Yao: Applied Thermal Engineering. Vol. 27(2007), p.988.

[8] C.R. Zhao, P.X. Jiang: Experimental Thermal and Fluid Science. Vol. 35(2011), p.1293.

[9] R. Rayegan, Y.X. Tao: Renewable Energy. Vol. 36(2011), p.659.

[10] M.T. Roman, K.D. Butrymowicz: Archives of Thermodynamics. Vol. 32(2011), p.55.

[11] L. H. Pan, H. X. Wang, W, X, Shi: Energy. Vol. 37(2012), p.281.

[12] W. Nowak, A. Borsukiewicz-gozdur S: Archives of Thermodynamics. Vol. 33(2012), p.77.

[13] B. Liu, K. Chien, C. Wang: Energy. Vol. 29(2004), p.1207.