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Overturf M.,Nadan Energy LLC | McKnight D.,IAI Inc.
Energy Engineering: Journal of the Association of Energy Engineering | Year: 2012

Business managers have few tools with which to determine whether their firm's energy productivity is getting better or worse.We propose a sustainable energy index (ENDX) that• tracks the energy productivity of a business• characterizes the description of energy risk on business operations• supports the continuous improvement of energy productivity• disassociates energy investments from cognitive biasA positive change of this index means that a business is improving its relative cost position and reducing its energy risk. A negative trend implies the opposite. Source

Chrosny W.,Natural Power Solutions LLC | Stine R.,Natural Power Solutions LLC | Overturf M.,Nadan Energy LLC
Distributed Generation and Alternative Energy Journal | Year: 2012

Managing energy costs in mid-size industrial and commercial firms is a complex problem that often focuses on the direct costs of energy resources (electrical energy, gas and oil), to exclusion of other components of the total life cycle-cost of owning and running a business operation. Such a system life-cycle cost is affected over time by commodity and energy costs, energy availability and reliability, operation and maintenance costs/investments and the costs of emissions. More recent publications focus real cost models of energy management and take into account cost control, risk reduction and efficiency improvement. Costs and investments associated with reliability and demand pricing are often over-simplified or not included in the costing models. This article explores methods for extending the real options and cost models to include costs of reliability, demand pricing, emissions pricing and commodity pricing to allow the real cost models to be used as comprehensive methods for energy efficiency management. Note ownership or financial costs are typically included in the demand cost-which is often considered a capital recovery factor. Costs of reliability of different microgrid configurations are discussed and numerical examples for microturbine and cogeneration scenarios are presented. Source

Overturf M.,Nadan Energy LLC | Chrosny W.,NPS Inc | Stine R.,NPS Inc
Distributed Generation and Alternative Energy Journal | Year: 2011

Mid-sized industrial and commercial firms consume between 300 to 30,000 MWh of electrical and thermal energy per month. Energy managers in these firms seek to minimize costs, both in terms of absolute expense and the indirect costs of variances from expected quality.While many business managers negotiate direct utility costs, few firms have a continuous improvement process that structure cost control, efficiency improvement, and risk reduction. A complete management process requires planning, quantifying and exercising options, and variance analysis of efficiency and risk measures. The methods to accomplish this are not well understood.We describe how an Energy Index is used in the context of the Deming cycle with sufficiency-inclusive private energy portfolios, usually implemented as a microgrid. We discuss valuation, planning techniques, and show how business can institute a process that can be used to drive both energy cost and variance to zero over time. Source

Overturf M.,Nadan Energy LLC | Flynn B.,Nadan Energy LLC
Distributed Generation and Alternative Energy Journal | Year: 2012

Arbitrage is the exploitation of a commodity price differential in two or more markets. Energy Sufficiency is an element of an energy portfolio that makes use of just-in-time electrical or thermal generation or conversion. Energy Sufficiency Arbitrage requires the use of a sufficiency-inclusive private energy portfolio, characterized by a non-zero Energy Index (ENDX™) [2].A sufficiency-inclusive energy portfolio for consumers of large amounts of energy, specifically with high energy density (>70W/m2, for example), can be implemented using a private micro-grid, which creates a local energy market: a microgrid converts one form of energy into a more useful one at a certain cost. Arbitrage pricing opportunities are created in the pricing differential between microgrids and macrogrids, with a resulting cost reduction, often significant, for the portfolio owner.We discuss in this paper how a Sufficiency Arbitrage advantages are created and managed as part of the Sufficiency Kaizen continuous improvement process [3]. Source

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