Infiltration Velocity and Thickness of Flowing Slag Film on Porous Refractory of Slagging Gasifiers

Two analytical formulations that describe the fluid interactions of slag with the porous refractory linings of gasification reactors have been derived. The first formulation considers the infiltration velocity of molten slag into the porous microstructure of the refractory material that possesses an inherent temperature gradient in the direction of infiltration. Capillary pressures are assumed to be the primary driving force for the infiltration.

The Flip Side of Metcalfe’s Law: Multiple and Growing Costs of Network Exclusion

The study of networks and network science has grown in the last decade, but most network models fail to capture the costs or loss of value of exclusion from the network. Intuitively, as a network grows in size and value, those outside the network face growing disparities. This new direction is relevant too for the design of policy interventions as well as for shifting the scholarly research agenda toward greater focus on inequality and exclusion.

Utilisation of rice residues for decentralised electricity generation in Ghana: An economic analysis

This publication enlighten the reader about how ectricity can be produced using the rice husk at Ghana.Developing countries, especially in Sub-Saharan Africa, face large challenges to achieve universal electrification Using the case of Ghana, this study explores the role that rice residues can play to help developing countries meet their electrification needs In Ghana, Levelised Electricity Costs (LEC) of a grid-connected 5 MWe straw combustion plant ranged between 116 and 130 UScents/kWh, based on region of implementation .Rice straw combustion is a viable grid-connected option in all regi

An explicit J–V model of a solar cell for simple fill factor calculation

The J–V equation of a solar cell is implicit and requires iterative calculation to determine the fill factor and the maximum power point. Here an explicit model for J–V characteristic is proposed which is applicable to a large variety of solar cell. This model allows an easy estimation of fill factor from four simple measurements of the bias points corresponding toVoc, Jsc, and any two voltage values lying between 0 and Voc, where Voc is the open circuit voltage and Jsc is the short circuit current density.

Climate Policy and the Poor: Some Perspectives

The article explores the effects that India's climate policy will have in the context of the country's existing development problems India is expected to face severe challenges as a result of climate change and these will disproportionately affect the poor and the most vulnerable The country's current climate policies nevertheless adopt an approach that seems unlikely to improve conditions for the poor, unless it shifts from a top-down, growth-oriented strategy towards prioritizing access to basic goods and services as a primary policy goal.

Ab initio Simulations Of A Novel Sodium Superionic Conductor

In the current study, using first-principles simulations, we present a case for a novel composition: Na10GeP2S12 (NGPS), for application in room-temperature Na-S batteries.Solid electrolytes can enable safer and high-energy density batteries than liquid electrolytes .Sodium solid electrolytes can help in reducing the shuttling effect , which causes capacity loss in the newly emerging room-temperature Na-S batteries.

Sustaining Engineering Informatics: Toward Methods and Metrics for Digital Curation

Ensuring the long-term usability of engineering informatics (EI) artifacts is a challenge, particularly for products with longer lifecycles than the computing hardware and software used for their design and manufacture.Addressing this challenge requires characterizing the nature of EI, defining metrics for EI sustainability, and developing methods for long-term EI curation.In this paper we highlight various issues related to long-term archival of EI and describe the work towards methods and metrics for sustaining EI We propose an approach to enhance the Open Archival Information System (OAI