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One of the most complex structural transformation processes currently unfolding in Europe is the phase-out of coal mining and coal-fired power generation. This transition is embedded within the broader framework of international and European climate commitments and the ongoing energy transition, particularly under the environmental policies promoted by the European Union and the European Green Deal. The process entails profound economic, social, technical, and geopolitical implications, especially for single-indus...

The problem of industrial ventilation has arisen as a result of the serious pollution problems that arise both in the industrial and industrial environments. Before addressing an industrial ventilation study, the question should be raised whether there is no simpler means of reducing or eliminating the causes of pollution or of reducing pollution by modifying the production process or the design and construction of the actual ventilation system . The commissioning of an industrial ventilation system occurs wheneve...

Reducing the risk of occurrence of phenomena such as poisoning, as a result of the untimely penetration of a certain amount of toxic gases, inside a ventilation installation, is a priority, regarding the health and safety of workers, material assets and the negative influence on the environment, due to the possible problems caused by the occurrence of toxic atmospheres, formed by mixing air with toxic gases and vapors. In closed or semi-closed industrial and non-industrial buildings, effective ventilation is the p...

The ventilation network related to a mining unit for the exploitation of the useful mineral substance aims to ensure optimal microclimate conditions in underground. An ventilation network is made up of nodes and branches in order to establish its structure. In this sense, the mine ventilation must be seen as a source of life, in which the ramifications represent at the same time the arteries that transport the air to the working fronts and the evacuation of the poluted air to the surface. In order to establish the...

The energy crisis triggered globally in the last quarter of 2021, forced Romania to go through a winter with liberalized electricity and gas prices, a period unprecedented in terms of consumer prices, accentuated by the result of closing energy targets that coalfired operations as a result of the imposition of EU conditions for the restructuring of the mining and energy sector. The year before, 2020, the COVID-19 pandemic, with restrictions imposed, produced a decrease in electricity demand, a decline in coal-fire...

The Valea Jiului coal basin is the largest mining basin in Romania and includes from east to west the mining fields: Lonea, Lonea-Pilier, Petrila-Sud, Petrila, Livezeni, Salatruc, Dalja, Iscroni, Aninoasa, Vulcan, Paroseni, Lupeni , Lupeni-Sud, Barbateni, Uricani, Valea de Brazi and Campu lui Neag. The first opening works in the Lonea perimeter began with the excavation of the Rascoala gallery, in 1870, a gallery supported by brickwork. Also in the same period, the up-to-date exploitation of the outcrops from the ...

Mining is a very heavy industry. Every day miners take incredible risks to extract valuable ores and minerals from the earth's crust. In order to ensure the safe operation of the underground, adequate ventilation is required to ensure that the workplaces are permanently supplied with fresh air. By combining general ventilation with kilometers of secondary ventilation specific ventilation pipes, mining ventilation is a special area where errors can occur. Modeling and simulation of mining ventilation networks have ...

Anthropic activities involve the extraction of the transformation and use of natural resources. During the process of extraction at the surface or underground of useful minerals, particles or gases resulting from the natural rocking or release from the rock mass appear in the working environment. The process of transforming useful mineral substances is carried out on the surface in enclosed enclosures, involving the use of complex technological processes. During the course of these technological processes, explosi...

A ventilation system is defined by performing air exchanges between the indoor and outdoor environment with the purpose of creating environmental conditions as close to the required thermal comfort conditions. Before installing a fan, it is necessary to analyze the space in which it is to be used and the method of compensating the exhaust air (mechanically with another fan or naturally with dimensioned grids). The most important factors to consider when choosing a fan are: the volume of the space, the number of sh...

Applying iterative techniques to relatively simple ventilation networks, involves a considerable volume of mathematical calculations. For systems encountered in practice, the iterative methods become impracticable if the repeated calculations are to be performed manually. Computers can provide help in calculating mesh correction factors, respectively in calculating the branch flow rates. However, the number of iterations to be applied, along with organizational arrangements for mesh selection and network upgrading...

Industrial ventilation is an extremely complex area and involving deep knowledge of fluid dynamics in the modern version (CFD), three-dimensional propagation of heat, complex flow of fluids, steady state in transient conditions, operating problems, contaminants inside the industrial objective, and outside respectively. Ventilation and air-conditioning installations in industrial conditions are designed to ensure the purity of the air and the corresponding inside environment for man's activity and the nature of the...