Keresés

Keresési eredmények

• Six Sigma az előregyártásban: esettanulmány a betonacél megmunkálásnak fejlesztéséről

  49-60

  Pap Réka Zsófia

  Szűcs Edit

  Megtekintések száma:

  129

  A lean folyamatfejlesztések kulcsfontosságúak a termelési hatékonyság javítása érdekében. Kutatásunkban a DMAIC módszertan alkalmazásával vizsgálom az MEP üzem fejlesztését a lean six sigma jegyében. Kiemelve az előregyártott vasbeton gyártás kihívásait, a tanulmányom részletezi, hogyan segít a lean menedzsment a folyamatok hatékony tervezésében és méréseiben. A lean six sigma módszertan bevezetése folyamatok standardizálásával és hatékony fejlesztésével járul hozzá az üzem hatékonyságához.

• Role of Lean and Agile Supply Chain Models for Pellet Fuel Technologies

  119-130

  Szendrei János

  Kocsi Balázs

  Budai István

  Grasselli Gábor

  Szűcs Edit

  Megtekintések száma:

  163

  Business organisations constantly strive to improve their processes, both internal and external. Within the supply chain of a product, different strategies can be applied. This paper aims to answer the basic questions like what is the core of lean and agile SCM strategies, what are the differences of the two models, and how can they be combined. This paper examines further, which of these SCM models and what elements of them can be applied for wood pellet supply chains, also examining the possibility of their combination. The result of these examinations is, that even though fuel pellets can be considered as simple commodity and not a very innovative product, diversity in input characteristics, optimization of fuel pellet technology process variables and changes in output market qualities and quantities need sometimes agile, flexible answer from pellet fuel SCM. The basically lean character of pellet fuel technologies and SCM can further enhanced by implementing agile SCM model elements, as is the increased integration of suppliers into the supply chain.

• Role of Biomass in Urban Energy Management

  62-76

  Szendrei János

  Kocsi Balázs

  Szűcs Edit

  Megtekintések száma:

  147

  When making decisions on the use of energy, both on building and on city level, biomass plays certainly a role in looking for sustainable solutions. This study starts with highlighting some key points regarding urban energy management, including world urbanization trends, heat island effect of big cities and energy hierarchy in energy management. With these in mind, it is worth considering, how the shading effect of surrounding biomass can mitigate the heating needs as a wind barrier in the winter or decrease the cooling load as shadowing element in the summer, both for buildings and whole cities. These can be further enhanced by biomass integrated in the buildings’ envelope: green roofs and green walls can have significant energy conservation effects, according the characteristics of their different types. Lastly, urban disposal of biomass can lead to renewable energy generation, both in case of biogas production and waste incineration. These shading, covering and fuel possibilities all underline the importance of biomass in urban energy management.

• Model Calculations on the Use of Mobile and Stationary Units for Wood Pellet Production

  1-8

  Szendrei János

  Grasselli Gábor

  Kocsi Balázs

  Budai István

  Szűcs Edit

  Megtekintések száma:

  332

  This paper presents the model calculations made for supporting the decision making of different technology alternatives. Base cases were A) use of a mobile pelletizer and B) using pellet factories at fixed locations for the production of a new product, sheep wool pellets. Calculations were made for three alternatives for each base case. The results of the model were used to examine the energy, time and cost criteria of the alternatives. Based on the given preliminaries, results of the model calculations supported the recommendation to choose case B) for further technology management and supply chain management decisions.