The paper presents a probabilistic model to study security of supply in a gas network. The model is based on Monte-Carlo simulations with graph theory, and is implemented in the software tool ProGasNet. The software allows studying gas networks in various aspects including identification of weakest links and nodes, vulnerability analysis, bottleneck analysis, evaluation of new infrastructure et...

Employing wireless communications in gas sensing and air quality monitoring is essential in many industrial scenarios where wired networks cannot perform the task safely and effectively. In industrial environments, deploying wireless gas sensing networks becomes a major safety requirement. Hence, we consider the use of wireless networking in safety gas sensing applications. At the National Inst...

underbalanced drilling as multiphase flow is done in oil drilling operation in low pressure reservoir or highly depleted mature reservoir. correct determination of the pressure loss of three phase fluids in drilling annulus is essential in determination of hydraulic horsepower requirements during drilling operations. in this paper the pressure loss of solid-gas-liquid three-phase fluids flow in...

This report summarizes the recent findings on gas transport mechanisms in shale reservoir by pore network modelling. Multi-scale model was developed to accurately characterize structure. The single component established considering slippage and real property. systems were elaborated this basis. A multicomponent hydrocarbon further proposed influences of capillary pressure fluid occurrence fugacity...

The gas flow in shale matrix is of great research interests for optimized shale gas extraction. The gas flow in the nano-scale pore may fall in flow regimes such as viscous flow, slip flow and Knudsen diffusion. A 3-dimensional nano-scale pore network model was developed to simulate dynamic gas flow, and to describe the transient properties of flow regimes. The proposed pore network model accou...

Injection networks arise as a way to deal with the network partitioning problem in ad hoc networks. In this kind of networks, it is assumed that devices might have other communication interfaces rather than Wi-Fi and/or Bluetooth that allow them to connect to remote devices, such as GSM/UMTS. The problem considered in this work is to establish remote links between devices (called bypass links) ...

In the context of climate change, natural gas is becoming increasingly important for low-carbon development in China. The gap between the demand and supply of natural gas, domestically, and China’s high dependence on foreign sources, highlights the importance of ensuring a secure system for supplying natural gas in the country. This study applied ecological network analysis, a powerful systems-...

The concept of disaster resilience has received considerable attention in recent years and is increasingly used as an approach for understanding the dynamic response to natural disasters. In this paper, a new performance index measuring the functionality of a gas distribution network has been proposed, which includes the restoration phase to evaluate the resilience index of the entire network. ...