Zoltán Szamosi

• Doctor of Philosophy
• Professor (Associate) at University of Miskolc

Geothermal energy is increasingly promising for residential use due to rising energy costs and environmental awareness. This work experimentally examines the impact of pipe distribution on the heat pump's performance at varying temperatures for both the incoming water and the ground. The pipes are buried in the soil, distributing them on layers of...

This study examines the integration of emerging engineering technologies into STEM education with a focus on the green energy transition. Using a mixed-methods approach, including an international student survey conducted via Google Forms, the research identifies key factors influencing the demand for an innovative Master's program in Green Energy....

Összefoglalás. Ipari környezetben, ahol az alapanyagok között por alapanyagú termékek találhatóak, felmerül a porrobbanás lehetősége, ez alól az energiaszektor sem kivétel. Ebben az iparágban is megjelentek a biomasszák mint energiahordozók, amely termékekről számos esetben bebizonyosodott, hogy porrobbanás-veszélyesek, ezért szükséges védelmi inté...

The appropriate storage, transportation, and utilization of wood-based fuels, including woodchips, pellets, and sawdust, in the energy production process, depends on their efficient drying. Traditional drying methods include limitations such as high thermal losses, inefficient heat transfer, and sustainability issues. These barriers, coupled with t...

The world is moving towards decarbonization policies in the energy and industrial sectors to bring down carbon dioxide release and reach net zero emissions. Technologies to capture CO2 and use it as a feedstock to produce CO2-based chemicals and biofuels via chemical or biochemical conversion pathways can potentially reduce the amount of CO2 releas...

The aim of this research to determine how the different parameters influence the quality of the final product of alternative gases. The meaning of the alternative gases is a gas which released during heat treatment in inert atmosphere. We present a method which different kind of wooden spacies are heat treated to different heat treatment time but i...

Fuel quality is an important measure to assess as conventional fuel resources have been depleted at an alarming rate over recent years. For centuries, wood-based biofuels have been used extensively as the primary fuel source for boilers or heating plant operations. In a heating plant scenario, operating temperature, moisture content, gas usage, emi...

The depletion of conventional energy resources has created a bunyanesque energy problem in the current world order. In this article, the byzantine issues of optimisation i.e. modelling, simulations, sustainability assessment and economic analysis examples are discussed briefly. Life span analysis and associated capital costs for various solar dryin...

The future of conventional fuels has limited sustainability and creates disquietude because of the ubiquitous energy crisis worldwide. The judicious use of biomass or wood-based fuels is inevitable. The quality of wood fuels depends on the moisture content, and subsequently, solar drying solutions can play a vital role in adequately storing and con...

In the last decades, the EPS (expanded polystyrene) and the XPS (extruded polystyrene) have become the most frequently used thermal insulation. Furthermore, the XPS has step resistant thermal insulation with higher strength. Nowadays in our current economic situation, the circular economy plays a significant role. That means we need to intend makin...

The mixing of slurry in an anaerobic digester (AD) is one of many key parameters, which have a significant effect on specific biogas yield (BY) and volatile solid (VS) removal rate. The determination of the optimum mixing regime in a digester is very complex as it depends on a large number of internal and external factors such as microbial communit...

The European transport sector is evolving rapidly, and so do the challenges associated with its fuel needs. The advanced biofuels of second and third generations based on Lignocellulosic (LC) and microalgae biomass have emerged as promising alternative biofuels producers. The paper reviews the renewable energy scenario and its contribution to the t...

The transition towards using renewable sources of energy from traditional sources is inevitable in the 21st century. Many agro-based industries are now developing innovative solutions to transform their energy utility. These modern approaches are not only energy saving but economical also. In this study, the authors investigated the potential role...

The appropriate mixing system and approach to effective management can provide favorable conditions for the highly sensitive microbial community, which can ensure process stability and efficiency in an anaerobic digester. In this study, the effect of mixing intensity on biogas production in a lab-scale anaerobic digester has been investigated exper...

The effect of slurry mixing in an anaerobic digester on biogas production was intensively studied in the last few years. This subject is still debatable due to fact that this process involves three phases, solid-gas-liquid, along with the involvement of microbes during biochemical reactions, which are highly vulnerable to changes in hydrodynamic sh...

This article aims to present some opportunities for improved solar energy utilization by raising the share of renewables in energy generation in the Visegrád Countries (Poland, Czech Republic, Slovakia, and Hungary). The analysis is based on the status of the renewable energy targets in the member countries and their future possibilities. This pape...

Solid biofuels such as woodchips have always been a significant source of fuel in the field of renewable energy. However, the drying of wood chips has been a challenge in preparing biofuels and other applications. The moisture content of below 25% in the wood chips of grade EN 14961 is considered the premium wood chip material. Solar drying emerged...

Solar drying has emerged as a potential drying solution for agricultural products in many developing nations. The drying behavior of the product to be dried depends on many parameters of the dryer. A box-type natural convective solar dryer was developed to analyze the drying performance of Wood chips. Experiments revealed promising drying results w...

Adequate mixing is one of prominent factors which can enhance the biogas production. Uniform distribution of velocity and viscosity at lower impeller speeds is biggest challenge. Correspondingly, in this study CFD simulations of Rushton turbine, anchor impeller and disc mixer were carried out using SC tetra program. The rotational speed of the mixe...

Punjab state has huge potential of conversion of biomass to energy that can produce estimated 3172 MW power which is the highest among all the states in India. All the developing countries are struggling with increasing energy demand and the environmental pollution. The renewable and sustainable energy resources are the best substitute to the conve...

This paper is a critical evaluation of the effect of mixing on the biogas production rates in an anaerobic digester. Mixing plays a pertinent role in the efficiency of the anaerobic digestion process. This review analyzes the miscellaneous effects of mixing (microbial community, methane content and volatile fatty acids) at various mixing intensitie...

Mixing is a very crucial factor which has a significant effect on the efficiency of anaerobic digester. Mixing in digester is affected by various internal and external factors such as hydrodynamics of digester and impellers, viscosity of slurry, temperature and total solid content. In this study, various methods and techniques have been described t...

The environmental performance of a building used for living or working depends to a large extent on its design and structure, but the total impact has additional influencing factors as well. The role of masonry elements is especially important when taking the entire life cycle of a building into consideration. This paper aims to analyze the environ...

The Life Cycle Assessment for concrete is an important part of the total LCA of buildings. The composition of the concrete is more interesting when part of the cement is replaced by fly ash and expanded perlite. With application of LCA software GaBi 8 thinkstep for the concrete formulas, their environmental efficiency can be determined. One of the...

An absolute analysis was brought on the outcome of fusing the biogas production in an anaerobic digester by targeting the impeller geometry and mixing modes. Agitation, the most prominent factor, undeviatingly determines the consequences of an anaerobic digester operated at higher solid content. The sustainability of homogeneity of substrate for so...

The aircrafts are responsible for emitting several types of pollutants, especially the pollutants in the form of NOX, CO2, CO, UHC, SOX and Particulate Matter PM (smoke/soot). The impact of aviation emissions on the global is well known, where these emissions modify the chemical and microphysical properties of the atmosphere resulting in changes of...

Operational parameters can be easily controlled at lab scale experiments for an anaerobic digestion process. Our aim is to design a lab-scale digester equipped with an impeller to investigate how the geometry of impeller and different mixing modes effect the biogas yield of digester. Further, the methods of measuring the gas volume, gas composition...

Operational parameters can be easily controlled at lab scale experiments for an anaerobic digestion process. Our aim is to design a lab-scale digester equipped with an impeller to investigate how the geometry of impeller and different mixing modes effect the biogas yield of digester. Further, the methods of measuring the gas volume, gas composition...

Torrefaction is a method for upgrading raw biomass to produce solid fuels that exhibit higher energy density relative to that of the raw material. In countries that produce significant amounts of agricultural residues, torrefaction may facilitate the utilization of waste in the energy sector by adding value to the raw fuel and opening pathways for...

This paper has been written to call attention to a potential danger what may occur in Kaplan turbine refurbishments. In Tiszalök hydropower plant, Hungary, the shaft sealing of the refurbished turbine was damaged. In searching for the reasons it was assumed that due to increased internal velocities in the turbine, the pressure at the hub clearance...