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• European best practises for district heating

  47-49

  Zoltán Eperjesi

  Views:

  211

  In my current article I deal with the broadening extension of district heating that is highly beneficial from environmental and climate protection aspects. I present the energy efficient and environment friendly district heating upon some outstanding European best practises.
  District heating is of utmost importance concerning sustainable and secure energy supply because the share of the renewable energy sources continuously and gradually increases against the fossil energy sources (natural gas, crude oil) within the total energy consumption due to the directives for heat production of the European Union. As a consequence of that import energy dependency and coal-dioxide emission decrease in several countries like Hungary as well.

• The possibilities of biomass utilization in the field of spatial development

  59-63

  József Antal

  Gábor Grasseli

  Views:

  96

  By joining the European Union, Hungary made a commitment to increasingly utilize renewable energy sources. Keeping in view the agricultural circumstances of Hungary, we can state that biomass utilization has, overall, the greatest range of possibilities to use its products as ‘energy sources’. Biomass raw materials are useful in meeting emission control regulations for environment protection and to reduce climate change. The role of biomass production in spatial and rural development and in rural employment, and also in the decrease of Hungary’s energy dependence, supports development in biomass energy use. My aim in studying biomass utilization is the creation of a micro-regional level, decentralised, agro-energetic system-model for the use of plant and animal biomass for energy purposes, whether naturally or by anthropogenic activity, on agro- and sylvicultural areas, and on animal breeding farms. This model simulation method serves as a planning base for policy-makers during the spatial planning processes. The examination is presently in the stage of data collection. The collection of the basic data of the examination area and the purchase of the necessary equipment, materials and maps has already started. Contact has been made with local stakeholders, municipalities, municipality associations and micro-region managers.

• Investigation of soils of stubbles of winter wheat and winter peas in conventional and reduced tillage systems

  95-99

  Géza Tuba

  Györgyi Kovács

  József Zsembeli

  Views:

  214

  The effect of reduced and conventional tillage on soil compaction, soil moisture status and carbon-dioxide emission of the soil was studied on a meadow chernozem soil with high clay content in the soil cultivation experiment started in 1997 at Karcag Research Institute. Our investigations were done on stubbles after the harvest of winter wheat and winter peas after the very droughty vegetation period of 2014/2015.

  We established that the soil in both tillage systems was dry and compacted and the CO2-emission was very low. The positive effects of reduced tillage could be figured out only in the soil layer of 40–60 cm in the given weather conditions of that period.

• Measurement of the degradation of abandoned turf

  145-149

  Krisztina Varga

  István Csízi

  Views:

  228

  With the decreasing number of grazing livestock in Hungary, the role of the turf cultivation is also significantly decreasing. The proportion of the under- and non-utilized turf is increasing. In the research conduced at the University of Debrecen, IAREF Research Institute Karcag, we studied four types of turf utilization in three replicates on a salt field with timothy grass. We determined the flora composition of the experimental area, measured the soil moisture and the carbon-dioxide content of the soil.

• Competitiveness of the biomethane opposite with the CHP technology of biogas by definite plant size

  5-9

  Ilona Barta-Juhász

  Views:

  133

  The biogas sector has never before aroused so much attention as it does today. Combined heat and power (CHP) reliable and cost-effective technologies that are already making an important contribution to meeting global heat and electricity demand. Due to enhanced energy supply efficiency and utilisation of waste heat renewable energy resources, CHP, particularly together with district heating and cooling (DHC), is an important part of national and regional Green House Gas (GHG) emission reduction strategies.

  During my work I am going to use the basic data of a certain biogas plant than I assemble one model from that. Against the CHP technology I am going to plan a biogas cleaning-equipment. During my research it revealed, that in the case of a 1 MW output power plant it is not worthy to deal with biogas cleaning between national conditions. Investigating the quantity of heat recovery in the CHP technology it is obvious, that the net income at 1 m³ biogas is at least 72 times more than the cleaning technology (heat recovery is 0%).