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Validation and optimization of generalized porous media property relation for their use in volumetric solar receiver

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Abstract

Recently, the use of generalised correlations to calculate drop in pressure and transfer of heat in reticulated porous structure is proposed. Generalized correlations developed using Kelvin structures are used to study the flow of fluid and heat transfer in volumetric solar receivers and applicability of generalized correlations are validated. In conjunction with the local thermal non-equilibrium model, the volume average simulation approach is used to estimate the fluid flow and heat transfer in volumetric solar receivers. The results show that generalized property relations are valid for volumetric solar receivers. A parametric study on solar receiver using generalized property relations is performed and presented in this study. It is found that higher porosity with low Reynold’s number structures is preferable to enhance the heat transfer of the porous volumetric solar receiver for a given material.

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Abbreviations

A :

Absorptivity (–)

ρ :

Density of air (kg/m3)

A f :

Fluid flow cross-sectional area (m2)

C f :

Inertial coefficient (–)

m :

Mass flow rate (kg/s)

x :

Penetration depth (m)

K :

Permeability (m2)

p :

Pressure (Pa)

K r :

Radiative Conductivity (W/m K)

Re:

Reynolds number (–)

I :

Radiation Intensity (W/\({\text{m}}^{2}\))

n :

Refractive index (–)

d :

Pore diameter (m)

T :

Temperature (K)

U :

Velocity (m/s)

DPLS:

Direct pore level simulation

GIS:

Grid independence study

LTNE:

Local thermal non-equilibrium

RPS:

Reticulated porous structure

SES:

Solar energy system

VSR:

Volumetric solar receiver

VAS:

Volume average simulation

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Authors and Affiliations

  1. Aerospace Research Laboratory, Department of Mechanical Engineering, NITK Surathkal, 575025, Surathkal, India

    S. Madhukara, S. Rambabu & P. Parthasarathy

Authors
  1. S. Madhukara
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  2. S. Rambabu
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  3. P. Parthasarathy
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Correspondence to S. Madhukara.

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Madhukara, S., Rambabu, S. & Parthasarathy, P. Validation and optimization of generalized porous media property relation for their use in volumetric solar receiver. Int J Adv Eng Sci Appl Math 15, 103–109 (2023). https://doi.org/10.1007/s12572-023-00336-5

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  • DOI: https://doi.org/10.1007/s12572-023-00336-5

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