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Verification of the underground coal gasification (UCG) in laboratory conditions can brings same knowledge for effective control of this process. Automated process monitoring and control during gasification sometimes requires intervention of the expert personnel, which is not still available on operation. In this contribution are proposed same oppo...
Citations
... In UCG technology, there are various types of process parameters which to be required to monitor for successful operation [3,6,7]. The control and monitoring of important UCG process parameters are: ...
Underground coal gasification (UCG) is a complex process as it depends on many factors such as geological and geo-hydrological analysis of strata, physical and chemical properties of coal, operational process parameters, seismic events, analysis of produced gases in real-time. This paper mainly identifies the process parameter variations due to underground coal gasification. This scientific study could help us to choose appropriate sensors, and design and develop suitable monitoring units for the control, monitoring and precaution during coal gasification. In this article, one experimental work is carried out in laboratory scale with the help of developed system. This paper also described individual control and monitoring techniques of different operational process parameters required for successful UCG operation. This is helpful for successful operation in the actual field and reducing its complexity.
... Una de las herramientas de bajo costo para acceder de manera remota a un laboratorio que requieran de conexión a un computador es el software TeamViewer el cual permite acceder a un computador de manera remota y controlarlo a distancia. Entre los casos de aplicación del software TeamViewer tenemos que en (Popescu & Paraschiv, 2013) los autores presentan una solución de operación remota de un laboratorio de control mediante el software TeamViewer, en (Kačur et al., 2011) se utiliza el software como parte de una estrategia de monitoreo remoto en un proceso automatizado de gasificación, y en (Kurukunda et al., 2020) los autores presentan la interconexión de TeamViewer, LabVIEW, Matlab y Arduino para permitir a los estudiantes realizar experimentos en un motor de corriente continua. Sin embargo, TeamViewer es una herramienta que es beneficiosa siempre y cuando la comunicación con el equipo se realice a través de un computador, por ejemplo, en el área de control de sistemas se utilizan programas especializados como Matlab o LabVIEW para la programación de controladores los cuales se comunican con una tarjeta de adquisición de datos a la máquina real, así se tiene de intermediario a la computadora entre el usuario y la máquina. ...
En este artículo se presenta la adaptación remota del laboratorio de la asignatura Control Entrada-Salida, el cual tiene como objetivo principal que el estudiante aplique los conceptos de la teoría de control, a la vez que, adquiera habilidades de lógica de programación mediante el software LabVIEW para generar soluciones propias ante un problema real de control. Para la adaptación a modalidad remota se tuvo en cuenta que: se requiere de acceso a un computador con LabVIEW para comunicarse con las plantas y se necesita de una persona que encienda las plantas. Además, dado que solo se cuenta con dos plantas HVAC(Heating, Ventilation and Air Conditioning) y dos plantas VTOL(Vertical Take-Off and Landing), no es posible que los estudiantes se lleven las plantas para sus casas. Inicialmente, se analizaron todas las sesiones de laboratorio que debían ser implementadas, para identificar las necesidades de hardware y/o software en cada una de ellas. De esta manera se realizaron los diseños e implementaciones necesarias para adecuar las prácticas existentes según los requerimientos. En cuanto a la implementación de la adaptación remota del laboratorio de Control: Entrada-Salida, se utilizó el software TeamViewer para solucionar el problema del control remoto de los computadores con LabVIEW. Las adaptaciones remotas de las siete prácticas de laboratorio se implementaron en el periodo 2020-2. Finalmente se realizó una encuesta a los estudiantes para conocer su opinión sobre el trabajo remoto. Se tabularon y analizaron los resultados para darle continuidad al trabajo remoto durante los semestres que sea necesario debido a la contingencia actual.
... Before starting the UCG process at the site, a laboratory scale investigation on the this technique in a practical scenario is necessary. Monitoring system plays vital role for successful operation of UCG process and reduces its complexity [28,29]. For this purpose an experimental set-up has been established at Indian Institute of Technology (Indian School of Mines), Dhanbad in India. ...
Energy demand will continue rising in India due to increasing pressure of population; continuing urbanization; significant expansion of better living standards of the middle class peoples; electrification in more and more villages; and modernization of agriculture, infrastructure and manufacturing sectors. In India, coal is the most abundant and major fossil fuel which is going to play big role in meeting its energy demand. A major part of this requirement can be met by proper utilization of deep-seated coal. Underground coal gasification (UCG) process is a clean coal technology for utilization of unminable coal. In this article, a novel simple laboratory model of UCG is developed with advanced real-time control and monitoring. The experimental study is carried out on a high-ash single coal block for 48 h period. In this experiment, synthesis gases are produced by the gasification of coal block by using oxygen and steam as the main oxidising agents. Observation and analysis are made on the characteristic of produced gases, coal-tar, cavity-growth under variable process conditions. This laboratory-based experimental study will play a vital role for prediction on practically-difficult UCG process for successful operation in actual field by reducing its complexity.
... The number of values of the cost equation are gained on the basis of values recorded during the boring process, respectively part of the economic character values are substituted on the basis of a qualified estimate. The course of the cost equation is complemented by a fifth-order polynomial model, while there is a coefficient of determination R 2 =0,9997 (it is approaching the ideal theoretical course of the cost equation)[10,11,12,13]. ...
Current information technologies and their subsequent applications in the industry enable a new view on already well-known processes, actions, phenomena and approaches, the realizations of which were very hard or not possible to accomplish nearly a decade ago due to difficult technical and economic conditions. This applies particularly to those areas of the processes industry, which are characterized by massive ecological and environmental load from mining, the metallurgy and the chemical industry. Current information technologies enable us to sense and record data from these processes in hard operation conditions by using new technical remedies in real time, the subsequent storing of the measurement data, their processing and evaluation in situ or in a laboratory. The article describes the use of a full profile tunnel boring machine Wirth TB-II-330H/M using TBM technology during the boring of an exploration gallery of the tunnel Branisko from the east side. According to the used technology it is a very expensive construction and that is the reason that is needed to ensure the fluent and fast course of work progress by maximum mechanism performance and effective work time use. During the boring the tunnel boring machine passed through many geological formations while recording variables like downforce, revolution, the torque of the boring head, power consumption and boring length. The system's monitoring of input and output variables of a tunnel boring machine-rock process system and calculating its key performance indicators (KPI) enable a contribution to the development, design and subsequent evaluation of static and dynamic system models. The indicators of the technological process were designed for visualization in an operator system in order to promptly evaluate, verify, and access data provided by the individual models. The visualization of the boring process on different levels of the operator system, the division of user competences of the system, means defining the competences necessary to control the monitoring process. By defining each user role a hierarchy of managing levels is created and its interconnections enable us to achieve the desired outputs related to the specific level of managing. The technological process control of the boring process using the HMI principles used in the process industry become a new approach in the area of industry automatization.
... From the viewpoint of content the research is directed toward to increasing heating capacity of syngas. In the period of 2006 -2010, the research was focused on improving complex mutually influenced processes of the underground coal gasification and their optimal control [19][20][21][22][23][24]. The basic research methods have used in research are mathematical modeling of processes and experiments in laboratory conditions. ...
The idea of the transformation of coal in underground into synthetic gas so called syngas has interesting in world more centuries. The principal advantage claimed for Underground Coal Gasification (UCG) over mining is that it will be able to use coal that is not economically available through shaft or strip mining from a variety of reasons. UCG is both a coal recovery and a coal conversion technology. The syngas is possible to use either in chemical or energy industry but it depends on its composition. If syngas will be used as raw for chemical industry, the syngas should contain a higher or maximal reached amount of carbon monoxide. In case if syngas is fuel for producing electrical power by its combustion, the UCG should produce the syngas with higher concentration of methane because the methane has the highest calorific value from individual compounds of syngas. Today, similarly to all other countries in the world also in Slovakia there is an interest in the revival and perfection of the UCG technology. Therefore the UCG laboratory was built in Technical University of Kosice by aim to study syngas composition and its calorific value. The goal of this study is to gain greater understanding of the evolution of syngas composition in gasification channels, and from it to extract knowledge useful for the practitioner of UCG in situ. In pursuit of this goal, the research has been bases on two approaches: experiments in UCG laboratory and mathematical modeling, including of simulation studies. Both approaches have helped to discover complicated relationships during UCG and they will be subject of this lecture.
... Therefore, it is necessary to be concerned with optimising of them for the purpose of transport expense reduction. Problems of process optimising and controlling have been continuously handled by number of authors (Laciak et al., 2011; Hatala, 2007; Topal and Ramazan, 2010; Wang and Wang, 2010). Several works of them are also devoted to transport optimising in quarries (Burt and Caccetta, 2007; Ercelebi and Bascetin, 2009; Krause and Musingwini, 2007; Mena et. ...
One of basic conditions of transport optimising in a quarry is effective use of machinery and minimising of downtimes to be occurred. This condition may be reached good organisation and operation management of loading and transporting. Expenses for optimum management and organisation of transport are growing with increasing mining capacity and amount of mechanisms used within the transporting system. For larger installations, there is a request for use of computer applications to solve tasks related to optimisation of the transport system. In this paper a proposal is presented for transport optimisation in a particular quarry operation using electronic information collection to be performed by means of PDA device and applied software developed for transport management needs.
... Finally, the newest articles [18] [19] [20] provide first knowledge and experience from developing of UCG control. Monitoring and control of the process temperature conditions, allow to obtain a gas mixture with the desired functional properties, [21] [22] indicate the necessity of 248 978-1-4799-3528-4/14/$31.00 ©2014 IEEE improvement, broadly defined the process of monitoring, including the development of measurement tool [23] [24] that enable to determine the changes of temperature conditions in georeactor. These articles have not solved negative influences around georeactor. ...
— Underground coal gasification (UCG) appears as an efficient method for the conversion of the world's coal resources into energy, liquid fuels, and chemicals has attracted lots of attention in recent years. There are not known negative thermal impacts on rocks and surface. 2D temperature model is developing for studying temperature’s fields in overburden of UCG. Mathematical model is based on Fourier’s partial equation but expanded by heat exchange between solid and liquid phase. The liquid phase is represented by underground water flows. The dynamical model will allow simulating temperature fields in coal, rock and heat flows from UCG to surface through overburden (necessary for understanding of changes in the rock structure under the influence heat from UCG cavity).
... Finally, the newest articles [18][19][20] provide first knowledge and experience from developing of UCG control. Monitoring and control of the process temperature conditions, allow to obtain a gas mixture with the desired functional properties, [21][22] indicate the necessity of improvement, broadly defined the process of monitoring, including the development of measurement tool [23][24] that enable to determine the changes of temperature conditions in georeactor. These articles have not solved negative influences around georeactor. ...
... The orientation and sign of elements, specific heat flows are shown in fig. 3. The specific heat flows are given by (19 -22) formulas: (22) where q i,k , q v i,k are specific heat flows by conduction, streaming underground water, x is the dimension of i th element, is the time step. ...
Underground coal gasification (UCG) appears as an efficient method for the conversion of the world's coal resources into energy, liquid fuels, and chemicals has attracted lots of attention in recent years. There are not known negative thermal impacts on rocks and surface. 2D temperature model is developing for studying temperature's fields in overburden of UCG. Mathematical model is based on Fourier's partial equation but expanded by heat exchange between solid and liquid phase. The liquid phase is represented by underground water flows. The dynamical model will allow simulating temperature fields in coal, rock and heat flows from UCG to surface through overburden (necessary for understanding of changes in the rock structure under the influence heat from UCG cavity).
... Reliability indicators help designers and technologists more accurately determine the time and cause of the damage for the subsequent chisels replacement. There is a number of theories that describe the wear and dulling of rolling chisels, but the values obtained from monitoring can reveal new connections between input variables and the number of replaced chisels [14][15][16][17]. ...
The article deals with the calculation of reliability indicators of system dynamics, between the tunnel boring machine and the rock during the tunnel boring of the exploratory tunnel Branisko. The background deals with a design of a tunnel boring machine as a whole where the observed parts are rolling chisels in relation to the length of tunnel boring, as well as physical and technological properties of disintegrated rock.
This article deals with the creation of dynamic models in the form of transient characteristics obtained from the monitoring system boring machine-rock used in tunneling Branisko using the tunnel boring method (TBM). The rating system is the creation of statistical models and their approximation of the measured, respectively, monitored values. As a starting point a statistical model was used that was obtained by transient characteristics. The statistical model was then replaced by a new model by approximation. The objective is to design a model that would ensure that the output variable accurately monitors changes in input, and that the suppressed disturbance variables affect the output variable. To assess how the solutions to this goal are being approached, it is necessary to choose some quantitative indicators and indicators of the quality and accuracy of the model. The quality requirements for the model are expressed using quality indicators, respectively, selected criteria. The quality indicators model enables us to judge several variants of solutions and choose the most appropriate one. The following quality parameters of the model will be based on an analogy for the synthesis of control loops. The accuracy of the model is given by the deviation of the steady-state system in the course of a given type of input and a disturbance variable. The advantage of using these quality indicators for the model is their explicitness and that gives direct information on the timing of the reporting process. The disadvantage of these quality parameters of the model is that not all of them fully describe the whole course of the transient response. For these reasons, we have chosen an integral quality criterion for the model system.
