Energy Savings (Actual results using VOD)
Mining method: Long-hole transverse stoping
Tonnage: 3,400 tpd
Airflow: 1,350,000 CFM
Energy cost: CAD $0.075/kWh
Life of mine: 9 years
Direct operating savings: CAD $2.44/t
Net LOM savings including cost of ownership: CAD $1.63/t
Simple payback: 0.8 years
Mining method: Long-hole longitudinal & transverse
Tonnage: 3,500 tpd
Airflow: 600,000 CFM
Energy cost: CAD $0.05/kWh
Life of mine: 9 years
Direct operating savings: CAD $2.07/t
Net LOM savings including cost of ownership: CAD $0.77/t
Simple payback: 1.2 years
Mining method: Long-hole longitudinal retreat
Tonnage: 4,000 tpd
Airflow: 1,700,000 CFM
Energy cost: USD $0.18/kWh
Life of mine: 9 years
Direct operating savings: USD $2.09/t
Net LOM savings including cost of ownership: USD $0.94/t
Simple payback: 0.5 years
Ventilation on Demand (VOD) is a technology which has been undergoing continuous evolution since early implementations during a period of rising energy prices in the early 2000s. Howden is now able to release results from case studies of Ventilation on Demand systems at three typical underground mines.
The results are based on real data from the operating VOD systems for two of these mines. The third example represents the savings estimated at the feasibility stage to demonstrate improved metrics for a development project.
Achieving cost savings with Ventilation on Demand (VOD)
The net energy savings presented by a VOD system including up-front capital costs typically are on the order of 1% of total mining and milling costs on a per-tonne basis. Therefore, considering the average mine's profitability the implementation of VOD can increase net profit by 10% or more.
In addition, if VOD is considered at the feasibility stage or in concert with a major capital development project involving ventilation, there are often opportunities to reduce project capital costs by reducing fan and airway size.
Howden is an integrated manufacturer of hardware and software for mine ventilation control and automation. The VentSim™ CONTROL product line provides a complete Ventilation on Demand solution to help underground mines be more competitive.
For product enquiries or to request a technical visit, please contact: firstname.lastname@example.org
Full List of Case Study pages
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Howden completed a retrofit of VARIAX ID fans on the 640MW unit 5 at Asn?s Power Station, Denmark.
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Berre Petrochemical Cluster, which includes polypropylene and polyethylene plants, trusted Howden to reduce its power costs by 7% within a 3 year return on investment.
VentSim? CONTROL technologies result in impressive cost and energy savings while also raising productivity at Goldcorp Eleonore gold mine.
Fresnillo mine is one of the most technologically advanced deep mines in the world, and incorporates VentSim? CONTROL ventilation management.
UPTIME provides advanced compressor performance analysis at Gunvor Petroleum in the Netherlands
Howden worked with a North American hard rock mine to introduce a Ventilation on Demand system using VentSim? CONTROL technology.
Installing a bigger hub at Herningv?rket, reducing installation costs and future service expenses.
The understanding and knowledge provided by Howden is an essential factor when installing additional equipment on your compressors.
New integrally geared compressor (IGC) results in power savings up to 31MW/h a day
Replacement of primary plate heaters with Howden custom designed rotary air preheaters.
200 bar to 300 bar hybrid compressor retrofit for helium capacity filling
At Millmerran Power Station, Howden provides a tailored service that supports their needs of the plant to prepare for their upcoming major outage.
New boiler and FGD processes called for a total change of the ID booster fan at a power plant in Plzen
Howden develop method to drastically reduce the cylinder repair time of reciprocating compressors.
Upgrade your reciprocating compressor with our innovative coated liner solution.
The introduction of Howden's HC element to the air preheater resulted in extended operational times.
Huge savings were realised by using Howden's turnkey service to reduce heater leakage and running costs.
A large chemical plant on the east coast of the United States contacted Howden to perform a full Turnkey project on their critical path air preheaters.
Howden expertise solves long lasting problems with an axial fan at Uniper's Franken plant.
During the first few months after the deployment of Uptime, VEAS experienced two distinct challenges where the benefits of Uptime were clearly demonstrated.
VentSim? CONTROL case study for three typical mining projects.
Replacement of existing blades at the Wangqu Thermal Power Station
Building the world?s biggest reciprocating compressor - a white paper and video.
Efficient engineering solves impeller failures at the Wibank coalfield.
At Tarmac (Dunbar cement plant, UK), their existing Raw Mill fan was replaced with an enhanced Howden design in 2007.
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