Control model of energy flow in agricultural biogas plant using SCADA software
The article presents a model of controlling the flow of energy in agricultural biogas plant. Control model was made on the basis of a shared project biogas power plant. Biogas plant control algorithm modeled using SCADA software and an analysis of cost performance and life of the investment have been presented.
An IoT-based Framework for an Optimal Monitoring and Control of Cyber-Physical Systems: Application on Biogas Production System
Among the possible conversion processes for biomass is Anaerobic Digestion (AD) that produces a valuable energy known as biogas. However, the instability of biogas production is challenging due to the complex process of the AD that requires a precise environmental conditions as well as different bacteria populations. Hence, monitoring and controlling these conditions and tracking the bacteria behaviour inside the digester is the way to overcame this challenge and enhance the biogas production. We address these challenges by proposing an IoT-based framework that aims to implement an End-to-End secure Cyber-Physical System (CPS) for biogas plants. The proposed framework encloses three layers: the perception layer which is mainly the industrial network, the network layer that develops the IT network inside the plant where the supervision and control is being conducted. In addition, the application layer which is defined by the IoT platform and software sensor to enable predictive analysis. To show the effectiveness of the proposed solution, we deployed the framework implementation on GNS3 that fully simulates the real conditions.
Right coronary artery stenosis associated with tricuspid valve ring annuloplasty
A 70-year-old man with severe symptomatic functional mitral valve regurgitation underwent successful mitral valve repair combined with tricuspid valve ring annuloplasty. Pre-operative coronary angiography (CAG) showed no significant stenosis. One-and-a-half years later, the patient presented with an acute exacerbation of heart failure. Repeat CAG demonstrated tight stenosis in the right coronary artery (RCA) with arterial kinking that corresponded to the same point as the stenosis where the RCA is the closest to the tricuspid valve ring. The new lesion probably occurred as a consequence of the tricuspid valve ring annuloplasty.