Design and testing of high temperature micro-ORC test stand using Siloxane as working fluid

1st International Seminar on Non-Ideal Compressible-Fluid Dynamics for Propulsion & Power

物理学;力学

Turunen-Saaresti, Teemu^1 ; Uusitalo, Antti^1 ; Honkatukia, Juha^1

School of Energy Systems, Lappeenranta University of Technology, Finland^1

关键词: Biomass power plants;    Combustion engines;    Generate electricity;    High critical temperature;    High molecular weight;    Mobile applications;    Organic Rankine cycles;    Radial inflow turbine;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/821/1/012024/pdf
DOI  :  10.1088/1742-6596/821/1/012024

学科分类：力学，机械学

来源: IOP

【 摘 要 】

Organic Rankine Cycle is a mature technology for many applications e.g. biomass power plants, waste heat recovery and geothermal power for larger power capacity. Recently more attention is paid on an ORC utilizing high temperature heat with relatively low power. One of the attractive applications of such ORCs would be utilization of waste heat of exhaust gas of combustion engines in stationary and mobile applications. In this paper, a design procedure of the ORC process is described and discussed. The analysis of the major components of the process, namely the evaporator, recuperator, and turbogenerator is done. Also preliminary experimental results of an ORC process utilizing high temperature exhaust gas heat and using siloxane MDM as a working fluid are presented and discussed. The turbine type utilized in the turbogenerator is a radial inflow turbine and the turbogenerator consists of the turbine, the electric motor and the feed pump. Based on the results, it was identified that the studied system is capable to generate electricity from the waste heat of exhaust gases and it is shown that high molecular weight and high critical temperature fluids as the working fluids can be utilized in high-temperature small-scale ORC applications. 5.1 kW of electric power was generated by the turbogenerator.