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

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

Pecnik, Rene (TU Delft Energy Technology)
Smit, S.H.H.J. (Student TU Delft)
Patel, A. (TU Delft Energy Technology)
Roekaerts, D.J.E.M. (TU Delft Fluid Mechanics)

2016

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%.

http://resolver.tudelft.nl/uuid:478725ee-cfce-4c89-add4-8d9778d81ddc

Proceedings of the 5th International Symposium - Supercritical CO₂ Power Cycles

5th International Supercritical CO2 Power Cycles Symposium, 2016-03-29 → 2016-03-31, San Antonio, Texas, United States

Institutional Repository

conference paper

© 2016 Rene Pecnik, S.H.H.J. Smit, A. Patel, D.J.E.M. Roekaerts