Mirarco NHEET project Numerical Simulation

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A preliminary CFD simulation was completed on a particle-resolved packed bed with a mixture model to study the effects of humidity.

Engineering

Particle-Resolved Simulation with a
Mixture Model to Study the Effects
of Humidity
A preliminary steady-state CFD simulation was
completed in ANSYS Fluent 2021R2 on a particle-resolved
packed bed of spherical particles. Defaults were selected
for the phase interaction drag coefficient and
evaporation-condensation models.

Fluid Temperature
Fluid temperature decreased through the packed bed
due to a prescribed particle wall temperature
distribution.
Flow

Psychrometric Process
The psychrometric chart shows the approximate
upstream and downstream humidity content.
Chart created using http://www.flycarpet.net/en/psyonline

Performance
100% humidity
When compared against dry-air simulations, the preliminary
humid-air coefficient of performance is within 10%.
Although a 10% performance difference may be considered
nominal, the increase in liquid content merits further
investigation.
This preliminary study identifies an opportunity of future
work that can be completed on our Natural Heat Exchange
Engineering Technology for Mines project. We are currently
seeking investors to support the research. Please see
https://nheet.ca for details.

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Mirarco NHEET project Numerical Simulation

1. Particle-Resolved Simulation with a Mixture Model to Study the Effects of Humidity A preliminary steady-state CFD simulation was completed in ANSYS Fluent 2021R2 on a particle-resolved packed bed of spherical particles. Defaults were selected for the phase interaction drag coefficient and evaporation-condensation models.

2. Fluid Temperature Fluid temperature decreased through the packed bed due to a prescribed particle wall temperature distribution. Flow

3. Psychrometric Process The psychrometric chart shows the approximate upstream and downstream humidity content. Chart created using http://www.flycarpet.net/en/psyonline

4. Air Volume Fraction

5. Water-Vapour Volume Fraction

6. Water-Liquid Volume Fraction

7. Performance 100% humidity When compared against dry-air simulations, the preliminary humid-air coefficient of performance is within 10%. Although a 10% performance difference may be considered nominal, the increase in liquid content merits further investigation. This preliminary study identifies an opportunity of future work that can be completed on our Natural Heat Exchange Engineering Technology for Mines project. We are currently seeking investors to support the research. Please see https://nheet.ca for details.

Mirarco NHEET project Numerical Simulation

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