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  • Author or Editor: L Szabó x
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Energy saving in buildings is one of the most important research directions in the building sector. Energy saving solutions should not lead to decreased indoor environment quality. Because of the increased number of summer heat waves, cooling systems are widely used to assure thermal comfort in buildings. In this paper, ceiling cooling and wall cooling systems were tested and compared from the thermal comfort point of view using 24 subjects (12 women and 12 men). The cooling ceiling and wall surface and the supply/return temperatures were similar. Analysing the obtained subjective answers, no significant differences were obtained on average or by gender. However, significant differences were obtained between the subjective answers and the calculated PMV values. Furthermore, the occupant’s reaction was different after switching off the ventilation and cooling systems.

Open access

It is a prime aim to ensure a suitable comfort level in case of office buildings. The productivity of office employees is directly influenced by the comfort. Thermal discomfort and poor indoor air quality deteriorate the intensity and quality of human work. We investigated the comfort in office buildings with on-site measurements during the summer season. The office buildings were operating with different HVAC (Heating, Ventilating and Air-Conditioning) systems: ducted fan-coil with suspended ceiling, installation, non-ducted fan-coil with floor-mounted installation, active chilled beam with fresh air supply.

We evaluated the thermal comfort under PMV (Predicted Mean Vote), PPD (Predicted Percentage of Dissatisfied), the local discomfort based on DR (Draught Rate) and the IAQ (Indoor Air Quality) based on carbon dioxide concentration. The comfort measurements were evaluated. The measurements were evaluated with scientific research methods, comfort categories based on the requirements of CR 1752. The results of this comparison were presented in this article.

Open access

Solar power is the conversion of sunlight into electricity, using photovoltaic (PV) solar panels. This paper introduces the solar power station in Fish Country, in Hungary. The examined solar power station (50 kWp) consists of 200 pieces of polycrystalline silicon Kyocera solar panels. The efficiency of this power station was measured and calculated in order to determine its amortization period and the amount of prevented CO2 emission as a consequence of this technology. The results of the measurement and calculation of the efficiency demonstrate that the facility fulfils the committed requirements. Nowadays, the air pollution is considered as one of the major causes of the global warming. This is reflected by the EU restriction of the emissions. The solar power station, which was built by Aranyponty Halászati Ltd., contributed to reduce the local CO2 emission, but it has impact on the global level as well, because circa 50 tons of carbon dioxide is prevented to be emitted into the atmosphere per year.

Open access

Abstract

The beneficial effects of hippotherapy lie in the transmission of the horse's movements to the patient. The aim of our work was to create a measurement method for objective evaluation that can be used in natural settings without interfering with therapy.

Methodology/Principal findings

Our measurement system consists of three treble axis accelerometers connected to a data logger. Software was developed for data analysis and post processing. A commercial DVD recording camera was used to document the hippotherapy session. In this paper we present the results obtained in pilot measurements on ten children with cerebral palsy. For reference, a skilled rider was measured on the same horse using a passive following seat.

Conclusions

The acceleration diagrams show common characteristics useful to the interpretation of the movement transfer during hippotherapy as well as individual patterns indicating alterations in the movement reactions of different patients.

Restricted access