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Energies 2012, 5, 4726-4745; doi:10.3390/en5114726 OPEN ACCESS energies ISSN 1996-1073 /journal/energies Article Concept Development of Optimal Mine Site Energy Supply Monica Carvalho 1,* and Dean L. Millar 1,2 1 Energy Renewables Carbon Management Group, Mining Innovation Rehabilitation and Applied Research Corporation (MIRARCO), 935 Ramsey Lake Road, Sudbury, Ontario, P3E 2C6, Canada 2 Bharti School of Engineering, Laurentian University, 935 Ramsey Lake Road, Sudbury, Ontario, P3E 2C6, Canada; E-Mail: dmillar@ * Author to whom correspondence should be addressed; E-Mail: mcarvalho@; Tel.: +1-705-675-1151 (ext. 6613); Fax: +1-705-675-4838. Received: 13 August 2012; in revised form: 23 October 2012 / Accepted: 7 November 2012 / Published: 19 November 2012 Abstract: This paper reports on early work and concept development for Optimal Mine Site Energy Supply, where the specific energy supply requirements and constraints for mineral production operations are considered against methodologies that have been applied for other sectors and in other energy policy regimes. The primary motivation for this research is to help ensure that Canadian mineral producers will achieve reduced production costs through improvements in the efficiency with which they consume energy resources. Heat has not yet been considered for the mining sector in an integrated manner, which makes polygeneration of great interest. The methodology that optimizes configuration