Analysis of influence thermal performance of windows on the state room climate during the heating period

Authors

  • I. O. Kolesnik Ph D, Ukraine
  • V. O. Petrenko Cand. Sc. (Tech.), Ph D, Ukraine
  • I. L. Vetvitskiy Cand. Sc. (Tech.), Ph D, Ukraine
  • D. O. Vetvitskaya stud., Ukraine

Keywords:

, microclimate, construction materials, walling, thermal performance

Abstract

Abstract. Purpose. Analysis buildings heat balance showed that their heat loss are: through walls - 30%; through the window - 30%; through the basement and attic floor - 10%; for ventilation - 30%. The existing regulations regulate the minimum allowable thermal resistance of windows, which makes up for the I temperature zone of 0,75 m2·° C / W, which is 4.4 times less than the minimum thermal resistance of the walls. It is clear that it is impossible to equate THERMOPHYSICAL thermal resistance of transparent windows and opaque walls, heat-shielding properties can be increased by using various heaters. But, despite this, you can reduce the heat loss through the translucent structures by various methods: the correct orientation to the cardinal, the various technological and design solutions. And when you consider that the main potential for energy saving in Ukraine is contained in the existing fund of buildings and structures, and can easily be implemented by replacing the old "cold" energy-efficient windows, it becomes clear the urgency of the matter consideration. Methodology. Theoretical and experimental studies were carried out on the basis of fundamental knowledge in the field of thermal processes and techniques for solving problems of heat transfer, modeling of dynamic processes, methods and analysis of random processes, methods of mathematical statistics and forecasting. Findings. On the basis of studies to provide thermal insulation properties of buildings and structures necessary to use PVC windows with at least twochamber sash and triple-glazed windows, where the distance between the panes up to 16 mm. Keep in mind that while you should regularly ventilate the room to normalize humidity conditions, or install mechanical ventilation. To save energy, be sure to consider the recovery of ventilation air. Originality. The relationship influence the thickness and the number of vertical air layers on the heatshielding properties of the window frames (thermal resistance) for the case when the temperature in the layer is unknown or changes during the heating period from positive to negative. This allows you to specify the necessary thermal insulation properties at the design stage. Practical value. According to DBN V.2.6-31:2006 "Thermal іzolyatsіya budіvel" shows that the increase in thicknesses air gap does not significantly increase its thermal resistance. Heat transfer air gap due to thermal conduction, radiation and convection. With increasing an increasing proportion of convective heat transfer. We have an increase in the thermal resistance of the two layers and thus reduction of heat loss in a 1.88-fold compared with single layer of equivalent thickness. And an increase in the thermal resistance of the three layers and thus reduction of heat loss by 2.7 times compared to the same layer of equivalent thickness.

Author Biographies

I. O. Kolesnik, Ph D

Department of heating, ventilation and air quality, State Higher Education Establishment "Pridneprovsk State Academy of Civil Engineering and Architecture", 24-A, Chernishevskogo st., Dnepropetrovsk 49005, Ukraine

V. O. Petrenko, Cand. Sc. (Tech.), Ph D

Department of heating, ventilation and air quality, State Higher Education Establishment ―Pridneprovsk State Academy of Civil Engineering and Architecture‖, 24-A, Chernishevskogo str., Dnipro 49600, Ukraine

I. L. Vetvitskiy, Cand. Sc. (Tech.), Ph D

Department of heating, ventilation and air quality, State Higher Education Establishment "Pridneprovsk State Academy of Civil Engineering and Architecture", 24-A, Chernishevskogo st., Dnepropetrovsk 49005, Ukraine

D. O. Vetvitskaya, stud.

darya.vetvitskaya@mail.ru

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Published

2016-09-27

Issue

Section

Energy, ecology, computer technology in construction