The Application of a MIP Model to Select the Optimum Auxiliary Fan and Operational Settings for Multiple Period Duties

Acuña, Enrique; Hall, Stephen; Hardcastle, Stephen G.; Fava, Lorrie

doi:10.3138/infor.48.2.095

Cited by 5 publications

(5 citation statements)

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“…Thus an optimization model can be completely described by the objective function, given by Eq. (21), and the constraints, given by Eqs. (22)-(25).…”

Section: Fig 3 Delta To Wye Conversionmentioning

confidence: 99%

“…Mine ventilation is crucial for safety reasons, because it is responsible for clearing out noxious and flammable gasses; and also provides a comfortable working environment underground. The rating of the fans that provide ventilation, depending on its use, can range from 100 kW [20] to about 3000 kW [21]. Thus, contribution by the ventilation fans towards the total power consumption is quite significant.…”

Section: Introductionmentioning

confidence: 99%

“…This study considers EE but not by application of VSDs. Optimization techniques are sometimes employed, e.g., [27,28] discuss the use of nonlinear programming methods to find the optimal flow rates in the branches such that the rating of the fan, required to supply the network, is minimized; [29] shows the use of genetic algorithms (GA) to decide on the optimum number, location, and size of booster fans/regulators in the network; [21] makes use of mixed integer programming (MIP) to find the optimal angles of the auxiliary fan blades, in order to match the varying flow rates throughout the different stages in a mine. These studies are all performed with the objective of minimizing energy consumption and/or related costs, but there is no consideration for the TOU or the application of VSDs.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of mine ventilation fan speeds according to ventilation on demand and time of use tariff

2015

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h i g h l i g h t s DSM techniques are applied to an underground mine ventilation network. A minimization model is solved to find the optimal speeds of the main mine fan. Ventilation on demand (VOD) leads to a saving of USD 213160. The optimal mining schedule, together with VOD, leads to a saving of USD 277035. According to a case study, a maximum of 2 540 035 kW h can be saved per year. a b s t r a c tIn the current situation of the energy crisis, the mining industry has been identified as a promising area for application of demand side management (DSM) techniques. This paper investigates the potential for energy-cost savings and actual energy savings, by implementation of variable speed drives to ventilation fans in underground mines. In particular, ventilation on demand is considered in the study, i.e., air volume is adjusted according to the demand at varying times. Two DSM strategies, energy efficiency (EE) and load management (LM), are formulated and analysed. By modelling the network with the aid of Kirchhoff's laws and Tellegen's theorem, a nonlinear constrained minimization model is developed, with the objective of achieving EE. The model is also made to adhere to the fan laws, such that the fan power at its operating points is found to achieve realistic results. LM is achieved by finding the optimal starting time of the mining schedule, according to the time of use (TOU) tariff. A case study is shown to demonstrate the effects of the optimization model. The study suggests that by combining load shifting and energy efficiency techniques, an annual energy saving of 2 540 035 kW h is possible, leading to an annual cost saving of USD 277035.

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“…Thus an optimization model can be completely described by the objective function, given by Eq. (21), and the constraints, given by Eqs. (22)-(25).…”

Section: Fig 3 Delta To Wye Conversionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimization of mine ventilation fan speeds according to ventilation on demand and time of use tariff

2015

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“…Havalandırma sağlayan fanların anma değerleri, kullanımına bağlı olarak 100 kW [49] ile yaklaşık 3.000 kW [50] arasında değişebilmektedir. Bu nedenle, havalandırma fanları toplam güç tüketimine oldukça önemli bir katkı sağlamaktadır.…”

Section: Fanların Enerji Tüketimine Etkisi (Effect Ofunclassified

Investigation of the Effects of Ventilation Performance on Energy Consumption in Subway Stations and Tunnels

GÜVEN,

AKTAŞ

2023

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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Büyük şehirlerde artan trafik yoğunluğu, bir ulaşım aracı olarak metro kullanımını arttırmaktadır. Her gün binlerce kişi ulaşımını metro kullanarak sağlamaktadır. Ancak metro ortamı partikül madde, karbondioksit, uçucu organik bileşikler ve kötü kokular başta olmak üzere birçok kirleticiyi barındırmaktadır. Bu kirleticilere maruz kalmanın uzun vadede birçok sağlık sorununa yol açacağı yapılan çalışmalar sonucunda kanıtlanmıştır. Metro istasyonlarında kirletici seviyelerini azaltarak yolcu ve personel konforunu sağlamak amacıyla havalandırma ve iklimlendirme sistemine gerek duyulur. Havalandırma sistemleri, metro ortamında sağlıklı bir iç hava kalitesi yaratırken büyük ölçüde enerji tüketen sistemlerdir. Fanlar, elektrik motorları, karbondioksit miktarı ve diğer ekipmanlarda oluşan kirlilik faktörü havalandırma sistemlerinin tükettiği enerjiye etki etmektedir. Bir ortamın sağlıklı iç hava kalitesine sahip olması, havalandırma sisteminin yeterli performans gösterdiği anlamına gelmektedir. Verimli havalandırma sistemlerinin tasarlanmasıyla ortamda yeterli iç hava kalitesi sağlanırken havalandırma sisteminin enerji tüketimi de azaltılabilir. Bu çalışmada bir metro istasyonunda havalandırma sisteminin nasıl çalıştığı, metro ortamındaki kirleticiler, havalandırma sisteminin tükettiği enerjiye etki eden faktörler incelenmiştir. Enerjiyi daha verimli kullanarak ortamdaki iç hava kalitesini iyileştirebilecek yöntemler önerilmiştir.

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“…The resistance of the auxiliary ducting systems will change over time as the working faces advance, as indicated by Acuña et al (2010) and Duckworth and Lowndes (2003). Nevertheless, as a first approximation, the savings are only proportional to the airflow requirements as the resistance can be considered constant for any interval period and ventilation system considered.…”

Section: Vod Benefitsmentioning

confidence: 99%

Considering ventilation on demand for the developments of the New Level Mine Project, El Teniente

Acuña¹,

Feliú²

2014

Proceedings of the International Conference on Deep and High Stress Mining

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The New Level Mine Project (NLMP) underground expansion represents the future of the El Teniente mines in Rancagua, Chile. With the expansion, the daily production rate is expected to be between 137 ktpd and a maximum of 180 ktpd. This represents an increase of slightly over 30% production for the project. The current plan consists of two multi-year development phases from 2012 to 2014 and from 2015 to 2017, with production planned to start in the end of 2017 or early 2018. The underground development of the NLMP starting from both surface and the current underground workings is already underway. However, the limited availability of airflow for development and energy to increase the mine's ventilation for the 2012 to 2014 period motivated the study of ventilation mitigation strategies such as ventilation on demand to determine if it is possible to expand the number of working faces available, in an attempt to optimise the use of the current resources of the project such as energy. The ultimate objective is to accelerate daily development rates, which will produce additional savings and an increase of the value of the New Level Mine project. This paper presents the results of a preliminary study to estimate the cost and benefits of implementing ventilation on demand to increase the number of working faces and their energy efficient operation for the 2012 to 2014 development phase. The mine's current ventilation strategy for the development of the NLMP is presented and used as the baseline to assess ventilation on demand. The results and decision are discussed in terms of the potential additional value generated by implementing the ventilation on demand strategy, considering energy savings, other benefits that are expected and the time required to pay for the initial capital cost. https://papers.acg.uwa.edu.au/p/1410_59_Acuna/ Considering ventilation on demand for the developments of the New Level Mine Project,

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The Application of a MIP Model to Select the Optimum Auxiliary Fan and Operational Settings for Multiple Period Duties

Cited by 5 publications

References 1 publication

Optimization of mine ventilation fan speeds according to ventilation on demand and time of use tariff

Optimization of mine ventilation fan speeds according to ventilation on demand and time of use tariff

Investigation of the Effects of Ventilation Performance on Energy Consumption in Subway Stations and Tunnels

Considering ventilation on demand for the developments of the New Level Mine Project, El Teniente

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