نتایج جستجو برای: ucg
تعداد نتایج: 209 فیلتر نتایج به سال:
مدل‌سازی هندسی- تصادفی سه بعدی توده سنگ منطقه مزینو با هدف برآورد نشت گاز در استخراج به روش گاز کردن
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...
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...
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...
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...
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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