The Hydraulic Air Compressor (HAC) Demonstrator Project Dean - - PowerPoint PPT Presentation

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Jul 13, 2023 244 likes •413 views

The Hydraulic Air Compressor (HAC) Demonstrator Project Dean Millar B.Eng.(Hons), ARSM, PhD, FIMMM, CEM MIRARCO Mining Innovation, Bharti School of Engineering, Laurentian University Electrale Innovation Ltd Phone: 705-918-1613 Email:

SLIDE 1

The Hydraulic Air Compressor (HAC) Demonstrator Project

Dean Millar

B.Eng.(Hons), ARSM, PhD, FIMMM, CEM

MIRARCO Mining Innovation, Bharti School of Engineering, Laurentian University Electrale Innovation Ltd Phone: 705-918-1613 Email: dmillar@mirarco.org Find out more: www.electrale.com

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Q. What will be demonstrated?
A. Isothermal compressors that are easy to maintain will be cheaper to run

Shaded area = (Minimum) compression work

12% 12% 76% Equipment and installation Maintenance Electricity

US DOE: OFFICE OF INDUSTRIAL TECHNOLOGIES*

https://www.energystar.gov/ia/business/industry/compressed_air1.pdf

*50 kWe motor on the compressor, 2 shifts per day, 5 days per week, $0.05/kWh, 10 years

SLIDE 4

Modelled and measured processes are both nearly isothermal

2 4 6 8 10 12 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 Water discharge (m3/s) Temperature increase in downcomer (mK)

dT - BM38A dT - Pavese at al.

2 4 6 8 10 12 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 Water discharge (m3/s) Temperature increase in downcomer (mK)

dT - BM36A dT - Pavese at al.

SLIDE 5

Optimum compresion efficiencies are around 75 to 80%

25 50 75 100 125 150 175 200 225 250 275 300 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 Water discharge (m3/s) Free Air Delivery (Scfm) 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 Efficiency (%)

BM36A & BM38A FAD HAC Mk 14 FAD BM36A & BM38A Eff (%) HAC Mk 14 Eff (%)

25 50 75 100 125 150 175 200 225 250 275 300 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 Water discharge (m3/s) Free Air Delivery (Scfm) 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 Efficiency (%)

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As we explore the performance map of Dynamic Earth HAC we expect to obtain even better performance

0.01 0.1 1 10 100 0.001 0.01 0.1 1 10 QH/D Input mass flow rate of air (kg/s))

Ragged Chutes Dynamic Earth

SLIDE 7

We are thinking about HAC designs for mine installation

Integrated cooling No mixing head Sump in half of drift Raise forms riser Co-axial downcomer Open ended separator All instruments at base Simple PID loop

SLIDE 8

Detrainment occurs at low water flow rates

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~95% of the spend on the HAC Demonstrator was spent in Northern Ontario / Sudbury

SLIDE 11

The HAC Pack

Find out more: www.electrale.com 705-918-1613 dmillar@mirarco.org

SLIDE 12

The rubber lined pipe appears rougher than steel pipe

Literature value: 0.000150 m Our value: 0.000058 m Unlined steel pipe (low): 0.000045 m Unlined steel pipe (high): 0.000090 m

SLIDE 13

Zero pressure in the downcomer means water ‘free-fall’

1.00

0.00 1.00 2.00 3.00 200 400 600 800 1000 1200 1400 1600 Pressure (mH2O) Time (s) 600 rpm 700 rpm 650 rpm 750 rpm 800 rpm 850 880 rpm 0.27m

0.03m

0.15m

0.02m
0.07m
0.20m

P1P1 (@0.72 m below forebay base)

1.00

0.00 1.00 2.00 3.00 200 400 600 800 1000 1200 1400 1600 Pressure (mH2O) Time (s) 0.98m 0.50m 0.39m 0.21m

0.11m
0.07m
0.13m

P1P2 (@1.50m below forebay

1.00

0.00 1.00 2.00 3.00 200 400 600 800 1000 1200 1400 1600 Pressure (mH2O) Time (s) 1.62m 1.35m 1.24m 1.15m 0.97m 1.01m 0.90m P2P2 (@2.25m below forebay

1.00

0.00 1.00 2.00 3.00 200 400 600 800 1000 1200 1400 1600 Pressure (mH2O) Time (s) 2.23m 2.00m 1.87m 1.80m 1.64m 1.59m 1.47 P2P1 (@3.00m below forebay

SLIDE 14

1.00