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The article deals with the operation of biogas stations, especially in terms of power supply to a 22kV distribution grid. The article includes a draft model the objective of which is to simulate power supply to the aforementioned 22kV grid. The main objective of the model is to verify the stability of power supply. Furthermore, this model will be used for automatic analysis of the data obtained through...
The paper deals with utilization of a photovoltaic power plant, installed on the roof of buildings within the Technological Centre in Ostrava (TCO) for production of hydrogen through electrolysis of water. The hydrogen produced will be stored in pressure vessels and used as fuel in fuel cells. The whole system of electrolysers for hydrogen production, pressure vessels for its storage and fuel cells...
This paper focuses on modelling and subsequent comparisons of co-generation units with combustion engines. It provides substantial information about co-generation units. The document refers to a simulated co-generation unit delivering the power of 600kWe/657kWt, 1200kWe/1191kWt and 2000kWe/1990kWt.
This paper focuses mainly on performance analysis for three biogas stations situated within the territory of the Czech Republic. This paper contains basic details of the individual biogas stations as well as description of their types. It also refers to the general description of the measurement gauge involved, with specifications of its potential use. The final part of this paper deals with the analysis...
This article deals with general modelling of cogeneration units. It provides substantial information about cogeneration units. Development of cogeneration units has experienced an evident boom over the recent years. These are significant sources of both heat and electric power. That is the reason for seeking the fastest and the cheapest method to design a cogeneration unit with optimal performance...
The paper deals with consideration of potential means for control of electric output within a 22kV network using co-generation units cooperating with a photovoltaic power plant. The contents include comparison of individual methods for control of electric output using a co-generation unit with the output rating for 1 MW. The methods subject to comparison will include single-, two-, multi-stage and...
The paper describes the equipment and utilisation of the hydrogen technology laboratory included within the newly developed ENET technological centre for research of renewable energy sources and storage of electric power. The essential fittings of this laboratory comprise electrolyzers for production of hydrogen from de-mineralised water using electric power generated by photovoltaic panels, together...
The paper deals with utilisation of infrared thermography in the field of hydrogen fuel cells currently being implemented both in stationary and mobile applications. Completed thermovision measurements are used for evaluation of heating curves of particular type of fuel cells represented by the low-temperature cells with a proton exchange membrane (PEM). These cells form part of the experimental power...
This paper deals with the power analysis of co-generation units at a particular biogas station. The introductory section lists the co-generation units used to conduct measurements. Details of these measurements can be found in the section below. This part also provides a description of the measurement equipments used for measuring operations and recording of electric values, especially the data on...
This paper deals with research in the field of hydrogen production and consumption within the experimental fuel cells laboratory of VŠB-TUO to achieve optimization of operation and high efficiency. This system operates as an island system and it is powered from a photovoltaic power plant. Hydrogen is supplied from the electrolyzer Hogen GC600. The hydrogen produced then serves as fule for the fuel...
Biogas stations have become a significant renewable energy source over the recent years. Renewable energy sources are often characteristic for their unpredictable operation and they cause problems within the distribution network. That was why we focused on measurement conducted on a specific biogas station with evaluation of its operation. The measurement ran for two months and involved the automatic...
This paper describes the technological centre for research of renewable resources and accumulation of electric power that forms a part of the scheme ENET - Energy Units for Utilization of Non-Traditional Energy Sources. The centre will operate several systems for production and accumulation of electric power. One of them is a pyrolyzing unit for generation of gas from solid waste materials, which...
Because applications and operation of heat pump, especially air/water type, are connected with problem based on the principle of these heat sources, we designed methods for measuring complete heat pump energy balance. This will allow us clear up real operation characteristic of this type of heat pump and we gained real data for further analysis
This paper focuses on biogas plants with combined heat and power production and their impact on line voltage. It provides a description of a specific biogas plant subject to a longer measurement. The description reveals the course of measurement followed by essential statistical data pertaining to selected values. Further indicators include bar charts for voltage showing a certain asymmetry in the...
The paper deals with evaluation of co-generation units burning biogas. It presents a comparison of units delivering 1 MW, the so called small co-generation units. The types subject to comparison will include a combustion engine, an internal combustion turbine and a back-pressure turbine. Co-generation units (CGU) will be assessed mainly with respect to the supply of electric power. The assessment...
This paper deals with description of stochastic production of power in photovoltaic power plants and its impact on the distribution power grid. Stochastic production of power from these sources is characteristic for its hardly predictable and substantially dynamic course. That is due to its strong dependency on weather conditions, especially sunshine. The aim of this survey is to assess the extent,...
This paper deals with accumulation of electric power by means of hydrogen technology and reverse transformation of such power stored in hydrogen into electric power again. The crucial part of this paper comprises calculation of efficiency achieved by accumulation of power into hydrogen, including the efficiency of individual components forming the accumulation (storage) system located in the fuel...
At present, photovoltaic (PV) power plants are the fastest-growing renewable energy source in the Czech Republic. This rapid development of PV sources is having a negative effect on the electric power system control. One option for mitigating this effect is to store the energy generated by PV in times of excess power in the grid and supply it to the grid when required, i.e., during peak periods of...
The MCA8 supportive software was developed mainly for the purpose of the support of multi-criteria decision making in the field of electrical power engineering. The MCA8 offers six methods of multi-criteria analysis (MCA) for solving extensive multi-criteria decision making tasks. We can use this MCA8 software for comparison of the systems for storage of electrical energy gained from non-regulated...
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