The influence of radiative transfer on the turbulent flow inside solar absorbers operating with supercritical CO2

Conference paper (2016)

Authors

Rene Pecnik Energy Technology - Mechanical, Maritime and Materials Engineering
S.H.H.J. Smit Student
A. Patel Energy Technology - Mechanical, Maritime and Materials Engineering
D.J.E.M. Roekaerts Fluid Mechanics - Mechanical, Maritime and Materials Engineering
Research Group
Energy Technology (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2016 Rene Pecnik, S.H.H.J. Smit, A. Patel, D.J.E.M. Roekaerts
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Published Date

2016

Language

English

Reuse Rights

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Energy Technology

Abstract

In this paper we investigate and compare two dierent solar receiver technologies for concentrated solar power plants operating with supercritical CO2. The rst receiver is based on conventional surface absorbers, while the second receiver is based on an innovative idea to use volumetric receivers where sunlight is transmitted through a transparent pipe and directly absorbed by nanoparticles
dispersed in supercritical CO2. The optical properties of the nanoparticles and the CO2 at high pressures and temperatures have been rst estimated and then used in a Navier-Stokes solver that has been coupled to a radiative transfer solver. The results indicate that for temperatures up to 700C the volumetric receiver achieves thermal collector eciencies up to 65% as compared to
surface receivers with 50%.

Files

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(.pdf | 6.3 Mb)