Holistic design of Organic Rankine Cycles(ORCs):Working Fluid and Process from one Optimization Problem
Organic Rankine Cycles(ORCs)are used to transform low temperature heat to power.Since low temperature heat sources are manifold(e.g.geothermal,solar,waste heat),each application requires the engineer to tailor the cycle to the specific application.Tailoring the cycle aims at maximizing the process performance by optimizing both key process parameters and the selection of a working fluid.Today,the selection of a working fluid and the process optimization are addressed separately in a two-step-approach employing heuristic knowledge leading to suboptimal solutions.We present a novel framework for the holistic design of ORCs enabling simultaneous optimization of the process and the working fluid.The simultaneous optimization exploits the rich molecular picture underlying the PC-SAFT equation of state.The new framework is used for the optimization of a geothermal ORC application in a case study.It is shown that the results from the simultaneous optimization allow for an in-depth study of the dependency of the ORC process performance on the molecular properties of the working fluid.A sound holistic design of ORC process and working fluid is achieved.
Organic Rankine Cycle (ORC) Working Fluid Selection Computer Aided Molecular Design (CAMD) Process Optimization PC-SAFT equation of state
Matthias Lampe Marina Stavrou Joachim Gross André Bardow
Institute of Technical Thermodynamics,RWTH Aachen University,Germany Institute of Thermodynamics and Thermal Process Engineering,Universit(a)t Stuttgart,Germany
国际会议
桂林
英文
1-10
2013-07-16（万方平台首次上网日期，不代表论文的发表时间）