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• An economic study of a solar collector investment project with specific aspects of energy saving

  121-124

  Zsolt Hollósy

  Nóra Hegedűsné Baranyai

  Arnold Gór

  Views:

  116

  The energy saving properi es of an exisi ng solar collector investment has been assessed based on factual data and stai si cal methods. The seasonality of electricity, water and gas consumpi on has been determined. The number of guest nights, the electricity and gas consumpi on showed a strong and a moderate correlai on. The costs saved did not live up to the expectai ons, which makes the return indicators signifi cantly worse. The discrepancy may be due to the system being designed to be bigger than reasonable or the great energy loss as well. The lat er may be because of the distance between the collectors and the hot water containers. The system may have calibrai on problems as well. The whole area brings about saving an amount of energy that equals to HUF 851000, which translates into 8788 m3 of natural gas. The decrease of CO2 emission should come to 16.26 t. on an annual average.

• Analysis of practice of sustainability reports

  43-52

  Edina Kulcsár

  Views:

  219

  The responsibility of companies to reduce the negative effects of climate change is obvious. The transition from a traditional linear economy to a circular economy means an increasing burden on companies. Besides the adequate financial performance, more and more emphasis is being placed on environmental performance. This study examines the non-financial sustainability reporting practices of 20 companies listed on the Bucharest Stock Exchange. The analysis used non-financial reports of companies with the highest market capitalization between 2020 and 2022. The analysis results support that the reports of environmentally sensitive companies are more extensive and detailed concerning investigated aspects. The details and length of the companies’ ESG (Environment, Social, Governance) reports increased during the three years examined. The environmental and social aspects of disclosed documents are more detailed for the banks, the oil extraction, and the telecommunication companies. In the company sample examined, it can be observed that most of the reports are prepared according to the GRI regulation. It can also be observed that the companies examined made more detailed and longer reports. The research results also support the fact that the aspects of the ESG report (E, S, G) also depend on the sector in which the companies operate.

• The possibilities of companies how to reduce their emmisions

  61-68

  Zsuzsa Gál

  Views:

  164

  The sustainability and its key element, the environmental awareness has been known for decades, however in general can be said that in the decision making the short term economic profit is still more dominant both on the individual and company levels. In last few years the rapid growth of CO2 emission is now not just risking the human life but the flora and fauna is in heavy danger. The concerns pay more attention on their short-term profits instead of the environmental protection. First of all with the change of the leadership attitude can reach the environmentally conscious organization that can support the reduction of the emissions, so the improvement of the atmospherical CO2 concentration. In my study I’m going to present what possibilities do the companies have to reduce their emissions and how these improvements could be harmonized with the profit interests (with the reduce of electricity-, water-, and gas consumption).

• Energy Resources of Unmanned Aircrat Vehicle

  92-100

  Márta Juhász

  Bertold Békési

  Views:

  152

  Aviai on is the quickest and most praci cal way of locomoi on, to which people have been paying at eni on for thousands of years. Today – on account of air traffi c, energy crisis and environmentalism – the power source of the aircrat became a key issue. In addii on to fl ight safety, there is a growing emphasis on environmentally friendly operai on. The ineffi cient burning of fossil fuels comes hand in hand with the signifi cant pollutant emission and noise pollui on which bother even those living far from the airports. Nowadays the most important objeci ve of researchers and developers is to create an effi cient, clean and quiet airplane, thus as a new idea they at empt to ui lize electricity in this form on board the aircrat . The ari cle presents some various energy resources through some example of unmanned aerial vehicle.