Assessment of temperature parameters in the heated and unheated part of the hall object

Abstract

The article is aimed at the assessment of the temperature of the indoor environment in the heated and unheated part of the mechanic-repair hall object. Examined hall was provisionally separating by PVC hinge in the middle (dividing the hall into a heated and unheated part), with a view to reducing the cost of heating it, which was provided by two hot air heaters. In the paper, we assessed the effect of the PVC hinge to the temperature of the indoor environment. The measurements were carried out during winter temperature extremes. In the monitored hall, the surface temperatures of the floor construction were permanently recorded in 5 minute intervals during 24 hours with the surface temperature detector DT 10 and the air temperatures by the Dataloggers Comet and then there were statistically evaluated their interdependencies. By regression analysis it was detected a significant dependence between air temperature and floor temperature at all three measuring points F1 F3 (P < 0.05), in the heated part of the hall. The degree of dependence R was between 0.68 and 0.87. Similarly, it was also assessed an unheated part of the hall, where regression analysis of the results showed that there is very high dependence (P < 0.05) between the air temperature and the floor temperature at the measuring points F4 and F5 what is also evident from the time course of the recorded temperatures. The degree of dependence R was between 0.86 and 0.92. There were statistically compared the temperatures of the air in the heated and unheated part using the Tukey HSD test, where statistically significant differences were found, which was also confirmed by statistical analysis of F-test (P < 0.05). By measuring the internal air temperature, it was found that the critical point of heat leakage was the uninsulated sheet metal gate, where the lowest temperatures from -2.5 to 5 °C were measured. Due to large heat losses, the entrance gates were also separated from the heated part of the hall with PVC tarpaulin. For this reason, we focused on this part of the hall in which we statistically assessed the internal air temperature in the heated and unheated part of the hall at the entrance gates, where there were found significant differences from the statistical analysis of F-test and also by the Tukey HSD test (P < 0.05). In the part at the entrance gates the PVC curtain prevented a large leakage of heat. In the heated part of the hall, where was reached more stable temperature, were not recorded extreme values, as opposed to the unheated part of the hall, where occurred relatively high temperature fluctuations. Based on the results it was detected significant effect of PVC curtain on the temperature course in the hall.