The article presents an overview of experimental layout design solutions and the general operation scheme combined heat power systems with a high-temperature solid oxide fuel cell (SOFC). This system is environmentally friendly energy-saving way to produce electricity heat. use SOFCs makes it possible obtain electrical efficiency 45–55%. Combining electrochemical mechanical can increase total by up 60–65% in hybrid plant. discusses structure relationship between components plant various...

This contemporary experiment examines heat transfer and friction factor of liquid (water) going in a double pipe exchanger with twisted tape (TT) insert. Effect DPHE inserts dimple configuration by providing protrusion surface only on the front face hole placed adjacent to it over tube length 1500 mm diverse diameter (D) diameter-to-depth ratio (D/H) proceeding factor(f) characteristics are analysed this work. Twist for all cases is 5.5 each twist, range Reynolds number (Re) 6000–14,000, D...

Fuel cells are a promising source of clean energy. To find optimal parameters for their operation, modeling is necessary, which quite difficult to implement taking into account all the significant effects occurring in them. We aim develop previously unrealized model COMSOL Multiphysics that, on one hand, will consider influence electrochemical heating and non-isothermal fluid flow temperature field reaction rates, other demonstrate operating mode Solid Oxide Cell (SOFC) carbonaceous fuel....

The process of establishing relay protection and automation (RPA) settings for electric power systems (EPSs) entails complex calculations operating modes. Traditionally, these are based on symmetrical components, which require the building equivalent circuits various sequences. This approach can lead to errors both when identifying modes modeling RPA devices. Proper measuring transformers (MTs), component filters (SCFs), connected them effectively solves this problem, enabling configuration...

Currently, the key challenge of oil-refining industry worldwide is to produce environmentally friendly fuel in large volumes meet market demand, which due strict environmental standards governing permissible sulfur content fuel. Natural gas, refinery and coal gas contain acid gases such as hydrogen sulfide carbon dioxide. These compounds must be removed from stream because toxicity H2S prevent gas-induced corrosion pipelines facilities. Hydrogen released a result various industrial...

Modern electric power systems (EPSs) experience an increase in the number of distributed generation plants. These plants can be located far from center consumption, which "narrows" areas static aperiodic stability, determining possibility existence operating mode system. Since there variations conditions and changes it is necessary to use adaptive control algorithms. The presented methods are based on equations limit conditions. Reliable convergence iterative processes ensured by specifying...

This study involved the creation of a mathematical model and research "reforming-fuel cell" system with aim obtaining optimal operating parameters for solid oxide fuel cell. Based on results reforming modeling in ASPEN PLUS simulation software, exergy efficiency reformer was calculated. The were used to determine steam conversion process hydrocarbon fuels. Also, ANSYS software package, technical cell operation calculated - temperature at outlet anode, current density cell, as well...

A solid oxide fuel cell (SOFC) is an electrochemical energy conversion device that provides higher thermoelectric efficiency than traditional cogeneration systems. Current research in this field highlights a variety of mathematical models. These models are based on complex physicochemical and reactions, enabling accurate simulation optimal control cells. However, these require substantial computational resources, leading to high processing times. White box gray unable achieve real-time...

The article is devoted to the issues of utilization hydrogen-containing gas wastes in oil refining deep processing. Gas consist hydrogen, methane, ethane, propane, butane, other saturated and unsaturated C5-C7 hydrocarbons, sulfur compounds, carbon monoxide, dioxide, nitrogen oxygen. use a hybrid power plant for efficient conversion potential energy mixture into electrical thermal proposed. It shown that waste from production has net calorific value comparable natural (46 49 MJ/kg,...

A promising method of energy storage is the combination hydrogen and compressed-air (CAES) systems. CAES systems are divided into diabatic, adiabatic, isothermal cycles. In diabatic cycle, thermal after air compression discharged environment, scheme implies use organic fuel. Taking account prospects decarbonization industry, it advisable to replace natural gas in with obtained by electrolysis using power-to-gas technology. this article, SENECA-1A project considered as a high-power hybrid...

An analysis of the methods used in Bulgaria for estimating CO2, SO2 and dust emissions has been conducted.The first methodology, which is officially by all energy auditors at Agency Sustainable Energy Development targets efficiency combustion devices installed mainly industrial enterprises.The second Ministry Environment Water, more comprehensive can be applied to thermal power plants, small plants as well systems.In recent years, many projects related renewable projects, including hydrogen...

Currently, the process of creating industrial installations is associated with digital technologies and must involve stage developing models. It also necessary to combine different properties, functions, operational principles into a single system. Some tasks require use predictive modeling creation “digital twins”. The main processes during fuel cell electrochemical transformations as well movement heat mass flows, including monitoring control processes. Numerical methods are utilized in...

Currently, the problem of utilization landfill gas (LFG) released in landfills and municipal solid waste is becoming increasingly urgent. This due to environmental pollution and, as a consequence, level increase incidence population. The article provides an overview currently existing methods utilization. authors present have conducted research on from by cocombustion with hydrogen. Some experimental data were obtained influence various factors stable combustion mixture. advantage proposed...

The power output of photovoltaic modules operating under certain field conditions decreases over the time. module degradation factor depends not only by physical properties material but also change parameters environment where PV panels operate. time reflects on which is in a close relation with revenues from purchased electricity produced modules.The process normal accompanying operation panels. This result increased losses linear connections; relative humidity ambient air, and moisture...

Holography and high-speed filming were used to reveal movements deformations of the capillary porous material, allowing calculate thermo-hydraulic characteristics boiling liquid in structures. These structures work at joint action mass forces, which are generalised form dependences calculation for oil coolers thermal power plants (TPP). Furthermore, mechanism process field forces is explained. The development water steam formation mesh working gravitational investigated. Certain regularities...

The studies of the ultimate thermal flows have been carried out in metallic and poorly heat-conducting porous structures, which operate when gravitational capillary forces act jointly cool various devices power plants order to create a scientific methodology. mechanism destruction metal vaporizing surfaces coatings low porosity made natural mineral media (granite) has described on basis problem thermoelasticity experimental data. Thermal flow dependences time their action depth penetration...

It was shown that liquid boiling processes occur in the porous cooling systems of elements heat and power installations crisis situation exchange wall overheating may at high thermal conditions.An experimental installation assembled whose schematic conditions experimentation were represented paper studying crisis.A mechanism developed.The gravitational potential aids destruction steam conglomerates a structure, facilitating transport an underheated liquid.A surplus system creates directional...

Abstract The presented paper reveals the analyses of green energy potential in university building’s roofs, assessed through possibility installation commercial photovoltaic systems. studied roofs are part existing buildings University Ruse “Angel Kanchev”, Bulgaria. Extensive electricity consumption and production made, based on recent accounting, measurements, forecasted data. estimated from proposed plant 2, 9, 10 UPZ RU is amount 1 212 MWh/year, which constitutes 68.2% consumed 2019....

The burning of all fossil fuels is accompanied by the production large quantities nitrogen oxides. Nitrogen oxide from coal combustion formed molecular in air and contained fuel. In accordance with mechanism formation nitric fuel, it desirable to increase concentration dust flame. thermal regime accelerates release volatiles, flames spreading out coke residue contributes chemical reduction NOx. this work we consider specific issues NOx fuel ways reduce their atmospheric emissions. Presented...