Imperial College London
Dr Oyeniyi Oyewunmi

Dr Oyeniyi Oyewunmi

Faculty of Engineering, Department of Chemical Engineering

Academic Visitor
 
 
 
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Contact

 

+44 (0)20 7594 1442oyeniyi.oyewunmi12

 
 
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Location

 

432Bone BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{White:2017,
author = {White, MT and Oyewunmi, OA and Haslam, A and Markides, C},
publisher = {ICHMT},
title = {Exploring optimal working fluids and cycle architectures for organic Rankine cycle systems using advanced computer-aided molecular design methodologies},
url = {http://hdl.handle.net/10044/1/48804},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - The   combination   of   computer-aided   molecular   design(CAMD)  with  an  organic  Rankine  cycle  (ORC)  power-systemmodel  presents  a  powerful  methodology  that  facilitates  an  in-tegrated  approach  to  simultaneous  working-fluid  design  andpower-system thermodynamic or thermoeconomic optimisation.Existing  CAMD-ORC  models  have  been  focussed  on  simplesubcritical,  non-recuperated  ORC  systems.   The  current  workintroduces  partially  evaporated  or  trilateral  cycles,  recuperatedcycles and working-fluid mixtures into the ORC power-systemmodel, which to the best knowledge of the authors has not beenpreviously  attempted.   A  necessary  feature  of  a  CAMD-ORCmodel  is  the  use  of  a  mixed-integer  non-linear  programming(MINLP) optimiser to simultaneously optimise integer working-fluid  variables  and  continuous  thermodynamic  cycle  and  eco-nomic variables.   In this paper,  this feature is exploited by in-troducing binary optimisation variables to describe the cycle lay-out, thus enabling the cycle architecture to be optimised along-side the working fluid and system conditions.  After describingthe models for the alternative cycles, the optimisation problemis  completed  for  a  defined  heat  source,  considering  hydrocar-bon  working  fluids.   Two  specific  case  studies  are  considered,in which the power output from the ORC system is maximised.These differ in the treatment of the minimum heat-source outlettemperature, which is unconstrained in the first case study, butconstrained  in  the  second.   This  is  done  to  replicate  scenariossuch as a combined heat and power (CHP) plant, or applicationswhere condensation of the waste-heat stream must be avoided.In both cases it is found that a working-fluid mixture can per-form better than a pure working fluid.  Furthermore, it is foundthat partially-evaporated and recuperated cycles are optimal forthe unconstrained and constrained case studies respectively.
AU  - White,MT
AU  - Oyewunmi,OA
AU  - Haslam,A
AU  - Markides,C
PB  - ICHMT
PY  - 2017///
TI  - Exploring optimal working fluids and cycle architectures for organic Rankine cycle systems using advanced computer-aided molecular design methodologies
UR  - http://hdl.handle.net/10044/1/48804
ER  -
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