forming limit curve (flc) is an important tool for evaluation of formability of sheet metals subjected to different loading. free bulge of aluminume tubes has been investigated numerically to obtain flc. to verify the numerical results one experimental setup has been manufactured which has the ability of controlling the internal pressure and axial feed. in this study, time and zone of bursting ...

This study estimates the life cycle greenhouse gas (GHG) emissions from the production of Marcellus shale natural gas and compares its emissions with national average US natural gas emissions produced in the year 2008, prior to any significant Marcellus shale development. We estimate that the development and completion of a typical Marcellus shale well results in roughly 5500 t of carbon dioxid...

Natural gas is increasingly being viewed as one of the most viable alternatives to gasoline. However, its vehicular application will only be widespread if safe and high-capacity methane stores are developed. In this work, we report an over 33% increase in methane uptake on a post-synthetically modified metal–organic framework. The underlying mechanism for this dramatic increase is due to lattic...

Merchants operations involves valuing and hedging the cash flows of commodity and energy conversion assets as real options based on stochastic models that inevitably embed model error. In this paper we quantify how empirically calibrated model errors about the futures price term structure affect the valuation and hedging of commodity storage assets, specifically the storage of natural gas, an i...

We develop a game theoretic model of a shared commodity storage facility whose injection/ejection and space resources have been allocated to multiple selfish firms. We assume a setting where each firms injectability and deliverability depend on overall inventory within the store. This is most common in settings that involve the storage of liquids or gases such as natural gas or oil. We analyze ...

We develop a game theoretic model of a shared commodity storage facility whose injection/ejection and space resources have been allocated to multiple selfish firms. We assume a setting where each firms injectability and deliverability depend on overall inventory within the store. This is most common in settings that involve the storage of liquids or gases such as natural gas or oil. We analyze ...

A collaborative effort between industry and government shows progress towards the goal of identifying productive natural fractures in gas reservoirs using seismic methods. Improved geological understanding of mature gas reservoirs in offshore Gulf of Mexico points towards unrecovered resource. A simple new technique to improve primary cement jobs has resulted in a 36 percent decrease in average...