نتایج جستجو برای: ucg

تعداد نتایج: 209  

ژورنال: مهندسی معدن 2017

در ایران بخش زیادی از ذخایر زغال‌سنگ در عمق واقع شده و یا ضخامت کمی دارند که برای استحصال و استفاده از این منابع، فناوری گاز کردن زیرزمینی زغال­سنگ (UCG) می‌تواند به­‌عنوان بهترین گزینه مطرح باشد. یکی از این ذخایر زغال­سنگ، زغال­سنگ­های منطقه مزینو طبس است. از جمله معیارها و عوامل تأثیرگذار بر امکان­پذی...

Journal: :Mathematics 2023

The Cavity Simulation Model (CAVSIM) is a 3D, parameterisable simulator of the Underground Coal Gasification Process (UCG) that serves as benchmark for UCG prediction. Despite yielding accurate outputs, CAVSIM has some limitations, which chiefly include inadequate graphical capabilities to visualise cavity geometry and gas production, time-ineffectiveness in terms parametrisation, i.e., it invo...

2017
H Demeyer Z Louvaris A Frei R A Rabinovich C de Jong E Gimeno-Santos M Loeckx S C Buttery N Rubio T Van der Molen N S Hopkinson I Vogiatzis M A Puhan J Garcia-Aymerich M I Polkey T Troosters

RATIONALE Reduced physical activity (PA) in patients with COPD is associated with a poor prognosis. Increasing PA is a key therapeutic target, but thus far few strategies have been found effective in this patient group. OBJECTIVES To investigate the effectiveness of a 12-week semiautomated telecoaching intervention on PA in patients with COPD in a multicentre European randomised controlled tr...

Journal: :Journal of Cleaner Production 2021

This study aims to improve the understanding of potential environmental impact underground coal gasification (UCG) process based on a numerical investigation gaseous and dissolved chemicals’ transport in strata surrounding UCG reactor. A coupled thermal-hydro-chemical (THC) model framework COMPASS code is employed further developed for this purpose. The compared against analytical solutions ver...

Journal: :Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 2021

Underground Coal Gasification (UCG) is thought to be the most favourable clean coal technology option from geological-engineering-environmental viewpoint (less polluting and high efficiency) for extracting energy without digging it out or burning on surface. UCG process requires only injecting oxidizing agent (O2 air with steam) as raw material, into buried seam, at an effective ratio which reg...

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