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Pollack Periodica
Authors: Ivana Marko, Réka Csicsaiová, Jaroslav Hrudka, Ivona Škultétyová, Štefan Stanko, and Paula Brandeburová

areas. Furthermore, the composition of the rainwater depends on the type of paved area on which it will fall. Usual rain contains the following parameters: chlorides, sulfates, nitrates, potassium, calcium, and magnesium in concentrations up to 10.0 mg

Open access

different base fluids (i.e. water, Ethylene Glycol (EG) and oil). Finally, these examined tests were affected by the different volume or weight concentrations and variable mass or volume flow-rate [ 10 ]-[ 12 ]. The numerical side took more attention

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characteristics, dissolved oxygen concentration, biomass amount). It has a long tradition to use Activated Sludge Models (ASM) model family [ 10 ], therefore a lot of experience is gained in model calibration and validation procedure. These models focus on

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During the production of natural gas one of the major problems is the formation of hydrate crystals in the pipeline. The forming hydrate crystals can form hydrate plugs in the pipeline. The hydrate plugs lengthen production outages and result in financial losses for the producer, because the removal of the plugs is a time consuming procedure. One of the solutions used to prevent hydrate formation is the injection of modern compositions to the gas flow. The modern compositions help to dehydrate the gas, thus, the size of hydrate crystals does not increase. The substances, used in low concentrations, have to be locally injected, at the gas well sites. Inhibitor dosing depends on the amount of gas hydrate present. In the article a neural network based predictive detection solution is presented, which uses four factors.

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usually expressed by the CO 2 concentration in the space and the air ventilation rate [ 12 ]. This study presents the evaluation of a typical existing social house design in Algerian hot and dry climate region, which represent the major part of the

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.C. , Jenkins D. , Parker D. S. Relationship between organic loading, dissolved oxygen concentration and sludge settle-ability in the completely-mixed activated sludge process , Journal Water Pollution Control Federation , Vol. 52 , No. 10

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Pollack Periodica
Authors: Gábor Rózsás, György Bognár, Gábor Takács, and Balázs Plesz

conventional photovoltaic systems, concentrator photovoltaics use large surface concentrators, which are lenses and/or curved mirrors, to focus sunlight onto small, but highly efficient, multi-junction solar cells [ 2 ]. Depending on the level of concentration

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1st October to 30th April, [°C] 4.4 Indoor air quality Indoor Air Quality (IAQ) is considered as the final outcome of both air pollutants and existing ventilation that decreases them. CO 2 concentration level is the main indicator of IAQ and

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Code’ in the field of comfort-energy-environment. The evaluation is done in the following sub-categories: thermal (operative temperature) and visual comfort (daylight factor), air quality (CO 2 -concentration), energy demand, origin of energy supply and

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Pollack Periodica
Authors: Mohammad Reza Ganjali Bonjar, Bálint Baranyai, Kristóf Roland Horváth, and István Kistelegdi

temperature control is complemented by an exhaust air temperature regulation via Proportional Integral (PI) control and return air CO 2 -concentration is controlled with a smoothed proportional PI controller, combined with a mixing-box economizer that

Open access