On the solid state heat transport phenomena measurement

Koštial, Pavel; Špička, Ivo; Jančíková, Zora; Rusnák, Vladimír

doi:10.1002/mawe.201400380

Cited by 1 publication

(3 citation statements)

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“…To assess the suitability of a respective material, we will use the specific heat capacity, thermal conductivity and diffusivity as well as the density. These values were measured at room temperature by the LCM method described in [27].…”

Section: Resultsmentioning

confidence: 99%

“…Samples of fire clay and concrete were after its preparation heat treated in temperature 1100 °C, the sample of bauxite in temperature 900 °C. Thermal data obtained by method described in [27] are presented in Table 1. The tested material was fire clay (squeezed) with a composition of Al2O3 ≥ 36.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 5 represents fire clay DTA/TG curves. Thermal data obtained by method described in [27] are presented in Table 1. The tested material was fire clay (squeezed) with a composition of Al2O3 ≥ 36.…”

Section: Resultsmentioning

confidence: 99%

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Effective Ecological and Cheap Heating of Dwelling Spaces

et al. 2019

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The sustainability of human civilization depends largely on green energy management. This work represents one way to achieve this goal. The work is devoted to converting microwave radiation to heat. The article analyses different ways of heating residential and utility areas. Materials suitable for converting microwave radiation to heat from ceramic composites, concretes, fire clays, and bauxite with water glass are enclosed. For all materials we have measured DTA/TG (Differential Thermal Analysis/Thermogravimetric Analysis) curves, XRD (X-Ray Diffraction) patterns, chemical composition of samples, the specific heat capacity c p [J/kg.K], thermal conductivity k [W/m.K] and diffusivity α [m 2 /s -1 ]. The cooling curves of these materials after microwave heating are characterized in detail. The paper also presents a description and construction of a microwave reactor together with the parameters of the living space heating.Sustainability 2020, 12, 55 2 of 15 and oceans or the environment. The most suitable sources of this origin for heating modern homes are solar energy and energy from biomass. Wind energy is less advantageous; it can rather attract enthusiasts but its potential for family houses is not so great simply because such types need an open environment exposed to appropriate weather conditions. However, as mentioned, placing an object in such an environment increases the heat loss. The solution would be expensive and complicated, which would not pay off. Solar energy, on the other hand, is useable with a good potential in almost every family house or industry. The solar radiation after the impact on the surface area creates values from 1000 to 1250 kWh per year, thus using a photovoltaic panel or solar collectors can heat a household. Photovoltaic panels in the form of a sunroof have also entered the market, making use of two functions. There are also various collectors-window or wall. The window collector has a thickness of 20 to 30 cm and corresponds to a double window. Heat accumulated in the cavity is then consequently transferred to the storage tank by gravity or by a fan.Radiation heat has already been used for many centuries. A typical conventional heat is supplied, for instance, by a radiator or a typical electric heater (convector), through heating the air in its neighbourhood. At their surface temperature of 90 • C, infrared panel heaters radiate at the wavelength of approximately 9 to 10 µm, which is a suitable component for the human organism, influencing the growth of organism cells and psychological comfort.Microwave electromagnetic radiation represents another very efficient method of radiation heating. As opposed to other heating methods, higher temperatures can be achieved by a dielectric heating inside the heating body instead of on its surface [16][17][18].This paper contains an experimental analysis of the physical aspects of the conversion of microwaves to heat, while ensuring the safety of such a process. Specific ceramic materials were selected and experimentally checked for such a...

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%