EXPERIMENTAL INVESTIGATION OF THERMAL CONDUCTIVITY AND HEAT CAPACITY OF COAL-WATER FUEL

2016 ◽  
Vol 17 (2-4) ◽  
pp. 165-185 ◽  
Author(s):  
Valeriya A. Pinchuk ◽  
T. A. Sharabura ◽  
Andrey V. Kuzmin
Keyword(s):  
Thermal Conductivity ◽  
Experimental Investigation ◽  
Heat Capacity

Experimental Investigation on Lightweight and Lime Stabilized Earth Composites

2015 ◽  
Vol 666 ◽  
pp. 31-45 ◽  
Author(s):  
Stefania Liuzzi ◽  
Pietro Stefanizzi
Keyword(s):  
Thermal Conductivity ◽  
Experimental Investigation ◽  
Heat Capacity ◽  
Sorption Capacity ◽  
Bending Strength ◽  
The Other ◽  
Vapour Permeability ◽  
Final Performance ◽  
Mechanical Strengths ◽  
Measured Thermal Conductivity

An experimental investigation on different clay-based plasters with straw (lightweight plaster) and lime (stabilized plaster) was carried out. The aim of the study was to increase the knowledge on earthen materials in terms of final performance in building applications. In the first part of the study different thermal and hygric parameters were measured: thermal conductivity, specific heat capacity, sorption capacity, water vapour permeability. Furthermore, in order to test the suitability of the unfired clay as mortar, an analysis on the mechanical strengths was carried out, measuring the compressive and the bending strength. The results show, on one hand, that when straw is added to the basic mixture a significant improvement of the sorption capacity occurs, while, the addition of lime enhances the thermal properties. On the other hand, no significant improvement of mechanical strengths can be appreciated when using these additives. Nomenclature

scholarly journals Applying Active Thermography in the Non-Destructive Investigation of Historical Objects/ Zastosowanie Termowizji Aktywnej Do Badań Nieniszczących Obiektów Zabytkowych

2015 ◽  
Vol 17 (2) ◽  
pp. 105-115
Author(s):  
Henryk Nowak ◽  
Paweł Noszczyk
Keyword(s):  
Thermal Conductivity ◽  
Experimental Investigation ◽  
Heat Capacity ◽  
Building Envelope ◽  
Practical Application ◽  
Wall Model ◽  
Historic Building ◽  
Active Thermography ◽  
Historical Objects ◽  
Non Destructive

Abstract The paper pertains to the problem of historic building envelope investigation with the use of active thermography. Mainly emphasized is its application in the detection of different material inclusions in historic walls. Examples of active thermography in the reflective mode application and a description of the experimental investigation has been shown on a wall model with the inclusion of materials with significantly different thermal conductivity and heat capacity, i.e. styrofoam, steel and granite. Thermograms received for every kind of envelope are compared and analyzed. Finally, the summary and conclusion is shown along with the prospects of development and practical application of this kind of investigation in historic construction.

Free and Forced Air Precooling of Perishable Food Products: Experimental Investigation

2020 ◽  
Vol 12 (4) ◽  
pp. 517-523
Author(s):  
Taliv Hussain ◽  
Shahzeb Ansari
Keyword(s):  
Thermal Conductivity ◽  
Experimental Investigation ◽  
Heat Capacity ◽  
Thermal Diffusivity ◽  
Free Convection ◽  
Forced Convection ◽  
Food Products ◽  
Convection Cooling ◽  
Forced Air ◽  
Thermo Physical Properties

An experimental investigation has been performed in order to compare the thermo-physical properties of spherical and cylindrical shaped food products during forced and free convection cooling. The specific heat capacity increases with the increment in the percentage of moisture quantity as in cucumber, it was 96% and in banana, it was 74%. The thermal conductivity of cucumber was found to be 18.7%, 7.6%, 5.1% more than that of banana, orange, capsicum respectively in case of free convection cooling but it was 18.7%, 7.8%, 5.3% more than that of banana, orange, capsicum respectively in case of forced convection cooling. In free convection cooling, the value of thermal diffusivity of cucumber was noted to be 9.02%, 2.96%, 3.85% more than that of banana, orange, capsicum respectively while in case of forced convection cooling, it was 76.06%, 62.62%, 20.19% more than that of banana, orange, capsicum respectively.

Experimental investigation of the isobaric heat capacity and thermal conductivity of N2O4-no solutions in the liquid phase

1980 ◽  
Vol 38 (4) ◽  
pp. 395-399
Author(s):  
A. G. Dashuk ◽  
A. Zh. Greben'kov ◽  
A. B. Verzhinskaya ◽  
Yu. D. Il'yukhin ◽  
N. F. Gladkii ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Experimental Investigation ◽  
Heat Capacity ◽  
Liquid Phase ◽  
Isobaric Heat Capacity

scholarly journals Influence of alkaline modification on selected properties of banana fiber paperbricks

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Abayomi A. Akinwande ◽  
Adeolu A. Adediran ◽  
Oluwatosin A. Balogun ◽  
Oluwaseyi S. Olusoju ◽  
Olanrewaju S. Adesina
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Moisture Absorption ◽  
Water Volume ◽  
Banana Fiber ◽  
Fiber Loading ◽  
Banana Fibers ◽  
Alkaline Modification

AbstractIn a bid to develop paper bricks as alternative masonry units, unmodified banana fibers (UMBF) and alkaline (1 Molar aqueous sodium hydroxide) modified banana fibers (AMBF), fine sand, and ordinary Portland cement were blended with waste paper pulp. The fibers were introduced in varying proportions of 0, 0.5, 1.0 1.5, 2.0, and 2.5 wt% (by weight of the pulp) and curing was done for 28 and 56 days. Properties such as water and moisture absorption, compressive, flexural, and splitting tensile strengths, thermal conductivity, and specific heat capacity were appraised. The outcome of the examinations carried out revealed that water absorption rose with fiber loading while AMBF reinforced samples absorbed lesser water volume than UMBF reinforced samples; a feat occasioned by alkaline treatment of banana fiber. Moisture absorption increased with paper bricks doped with UMBF, while in the case of AMBF-paper bricks, property value was noted to depreciate with increment in AMBF proportion. Fiber loading resulted in improvement of compressive, flexural, and splitting tensile strengths and it was noted that AMBF reinforced samples performed better. The result of the thermal test showed that incorporation of UMBF led to depreciation in thermal conductivity while AMBF infusion in the bricks initiated increment in value. Opposite behaviour was observed for specific heat capacity as UMBF enhanced heat capacity while AMBF led to depreciation. Experimental trend analysis carried out indicates that curing length and alkaline modification of fiber were effective in maximizing the properties of paperbricks for masonry construction.

scholarly journals Testing a Gypsum Composite Based on Raw Gypsum with a Direct Admixture of Paraffin and Polymer to Improve Thermal Properties

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3241
Author(s):  
Krzysztof Powała ◽  
Andrzej Obraniak ◽  
Dariusz Heim
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Thermal Properties ◽  
Phase Change ◽  
Large Scale ◽  
Building Materials ◽  
Residential Buildings ◽  
Energy Performance ◽  
Polymer Content ◽  
Volumetric Heat Capacity

The implemented new legal regulations regarding thermal comfort, the energy performance of residential buildings, and proecological requirements require the design of new building materials, the use of which will improve the thermal efficiency of newly built and renovated buildings. Therefore, many companies producing building materials strive to improve the properties of their products by reducing the weight of the materials, increasing their mechanical properties, and improving their insulating properties. Currently, there are solutions in phase-change materials (PCM) production technology, such as microencapsulation, but its application on a large scale is extremely costly. This paper presents a solution to the abovementioned problem through the creation and testing of a composite, i.e., a new mixture of gypsum, paraffin, and polymer, which can be used in the production of plasterboard. The presented solution uses a material (PCM) which improves the thermal properties of the composite by taking advantage of the phase-change phenomenon. The study analyzes the influence of polymer content in the total mass of a composite in relation to its thermal conductivity, volumetric heat capacity, and diffusivity. Based on the results contained in this article, the best solution appears to be a mixture with 0.1% polymer content. It is definitely visible in the tests which use drying, hardening time, and paraffin absorption. It differs slightly from the best result in the thermal conductivity test, while it is comparable in terms of volumetric heat capacity and differs slightly from the best result in the thermal diffusivity test.

Heat capacity and thermal conductivity of LiCl.7H2O

1993 ◽  
Vol 5 (24) ◽  
pp. 4007-4012
Author(s):  
N Ahmad ◽  
C J Adkins ◽  
W A Phillips
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity

Experimental investigation of extinction properties and thermal conductivity of metal-coated dielectric fibers in vacuum

1987 ◽  
Vol 8 (2) ◽  
pp. 263-280 ◽  
Author(s):  
H. Reiss ◽  
F. Schmaderer ◽  
G. Wahl ◽  
B. Ziegenbein ◽  
R. Caps
Keyword(s):  
Thermal Conductivity ◽  
Experimental Investigation
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