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http://dx.doi.org/10.9726/kspse.2012.16.4.030

Design of Scroll Expander for Electric Power Generation System using Organic Rankine Cycle with Biomass Energy Source  

Moon, J.H. (Mechanical System Engineering Department, University of Incheon)
Yu, J.S. (Mechanical System Engineering Department, University of Incheon)
Kim, H.J. (Mechanical System Engineering Department, University of Incheon)
Cho, N.J. (Neonergy Co.)
Publication Information
Journal of Power System Engineering / v.16, no.4, 2012 , pp. 30-36 More about this Journal
Abstract
A scroll expander has been designed to produce a shaft power from a R134a Rankine cycle for electricity generation. Heat was supplied to the Rankine cycle through a heat exchanger, which received heat from another cycle of water. In the water cycle, water was heated up in a boiler using biogenic solid fuel. The designed scroll expander was a horizontal type, and a trochoidal oil pump was employed for oil supply to bearings and Oldham-ring keys. For axial compliance, a back pressure chamber was created on the backside of the orbiting scroll base plate. Numerical study has been carried out to estimate the performance of the designed scroll expander. The expander was estimated to produce the shaft power of about 2.9 kW from a heat supply of 36 kW, when the temperature of R134a was $80^{\circ}C$ and $35^{\circ}C$ at the evaporator and condenser of the Rankine cycle, respectively. The expander efficiency was about 70.5%. When the amount of heat supply varied in the ranges of 7.5~55 kW, the expander efficiency changed in the range of 45.6~70.5%, showing a peak efficiency of 70.5% at the design shaft speed.
Keywords
Scroll Expander; Organic Rankine Cycle; Shaft Power; Biomass;
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  • Reference
1 Nagata, H., Kakuda, M., Sekiya, S., Shimoji, M., and Koda, T., 2010, "Development of a scroll expander $CO_2$ refrigerant cycle", international Compressor Engineering Conference at Purdue, No. C-1157
2 Kim, H. J., 2010, "Scroll expander design for low temperature cycle of a steam powered co-generation system", University of Incheon, Technical Report.
3 Hall, DD., 1983, "Biomass for energy in developing countries", GeoJournal, Vol. 7, No. 1, pp. 5-14.
4 Hung, TC., Shai, TY., Wang, SK., 1997, "A review of organic rankine cycle for the recovery of low-grade waste heat", Energe, Vol. 22, No. 7, pp. 664-667
5 Zanelli, R., and Favart D., 1994, "Experimental investigation of a hermetic scroll expander-generator", International Compressor Engineering Conference at Purdue, pp. 459-464.