@ARTICLE{Zapałowicz_Zbigniew_Experimental_2019,
 author={Zapałowicz, Zbigniew and Walterowicz, Anna},
 volume={vol. 40},
 number={No 3},
 journal={Archives of Thermodynamics},
 pages={181-194},
 howpublished={online},
 year={2019},
 publisher={The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences},
 abstract={Effective use of energy in various branches of economy is one of world trends in development of power engineering. Relevant energy consumption occurs during exploitation of buildings, so there is still potential to diminish it as far as heating, ventilation, and air conditioning are concerned. Particularly in summer season, the choice of respective roofing colour can play a decisive role for the heat flux transferred to the inside of the object. Decrease of heat flux causes a lower heat burden to the building and lower power consumption by the air conditioning systems. In winter, on the contrary, heat flux transferred to building’s interior should be higher, as a result, demand of energy for heating will be lower. However, calculations of the heat flux require that energy balance must be made for the object. Unfortunately, not all producers of roofing covers inform about the values of reflectivity and thermal emissivity of their products, which is, in turn, necessary for calculations. In the present paper, research methodology elaborated by authors is proposed for determination of thermal emissivity of roofing covers. The paper presents test stand, methodology, and research results for roofing paper in blue colour (as an example) for which the thermal emissivity is an unknown parameter.},
 type={Article},
 title={Experimental estimation of thermal emissivity for the roofing paper in blue colour},
 URL={http://www.czasopisma.pan.pl/Content/113496/PDF/10_paper.pdf},
 doi={10.24425/ather.2019.130000},
 keywords={Blue roof cover, Thermal emissivity of roof, Reflectivity of roof, Energy balance for roof},
}