Measurement of heat transfer and change in compressive strength of waste derived solid fuels due to devolatisation

Fuel ◽  
2008 ◽  
Vol 87 (8-9) ◽  
pp. 1724-1733 ◽  
Author(s):  
R. Marsh ◽  
A.J. Griffiths ◽  
K.P. Williams
Keyword(s):  
Heat Transfer ◽  
Compressive Strength ◽  
Solid Fuels

scholarly journals Mechanical and Thermal Performance Characterisation of Compressed Earth Blocks

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2978 ◽  
Author(s):  
Elisabete R. Teixeira ◽  
Gilberto Machado ◽  
Adilson de P. Junior ◽  
Christiane Guarnier ◽  
Jorge Fernandes ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Compressive Strength ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Water Absorption ◽  
Thermal Performance ◽  
Pulse Velocity ◽  
Building Envelope ◽  
Compressed Earth Blocks ◽  
Earth Blocks

The present research is focused on an experimental investigation to evaluate the mechanical, durability, and thermal performance of compressed earth blocks (CEBs) produced in Portugal. CEBs were analysed in terms of electrical resistivity, ultrasonic pulse velocity, compressive strength, total water absorption, water absorption by capillarity, accelerated erosion test, and thermal transmittance evaluated in a guarded hotbox setup apparatus. Overall, the results showed that compressed earth blocks presented good mechanical and durability properties. Still, they had some issues in terms of porosity due to the particle size distribution of soil used for their production. The compressive strength value obtained was 9 MPa, which is considerably higher than the minimum requirements for compressed earth blocks. Moreover, they presented a heat transfer coefficient of 2.66 W/(m2·K). This heat transfer coefficient means that this type of masonry unit cannot be used in the building envelope without an additional thermal insulation layer but shows that they are suitable to be used in partition walls. Although CEBs have promising characteristics when compared to conventional bricks, results also showed that their proprieties could even be improved if optimisation of the soil mixture is implemented.

scholarly journals Numerical and Experimental Analysis of Heat Transfer for Solid Fuels Combustion in Fixed Bed Conditions

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 6141
Author(s):  
Wojciech Judt
Keyword(s):  
Heat Transfer ◽  
Combustion Chamber ◽  
Transfer Process ◽  
Heat Load ◽  
Fixed Bed ◽  
Heat Transfer Process ◽  
Biomass Combustion ◽  
Solid Fuels ◽  
Hard Coal ◽  
Combustion Chambers

The paper concerns the analysis of the heat transfer process that occurred during solid fuel burning in fixed bed conditions. The subject of the analysis is a cylindrical combustion chamber with an output of 12 kW heating power equipped with a retort burner for hard coal and biomass combustion. During the research, a numerical and experimental study is performed. The analysis is prepared for various heat load of the combustion chamber, which allowed for the reconstruction of real working conditions for heating devices working with solid fuels combustion. The temperature distribution obtained by the experimental way is compared with results of the numerical modeling. Local distribution of principal heat transfer magnitudes like a heat flux density and a heat transfer coefficient that occurred on the sidewall of the combustion chamber is analyzed. The analysis showed, that the participation of convection and radiation in the overall heat transfer process has resulted from the heat load of the heating device. Research results may be used for improving an analytical approach of design process taking place for domestic and industrial combustion chambers.

scholarly journals Thermal and Mechanical Properties of Cement Mortar Composite Containing Recycled Expanded Glass Aggregate and Nano Titanium Dioxide

2020 ◽  
Vol 10 (7) ◽  
pp. 2246 ◽  
Author(s):  
Ali Yousefi ◽  
Waiching Tang ◽  
Mehrnoush Khavarian ◽  
Cheng Fang ◽  
Shanyong Wang
Keyword(s):  
Heat Transfer ◽  
Mechanical Properties ◽  
Compressive Strength ◽  
Titanium Dioxide ◽  
Energy Consumption ◽  
Transfer Rate ◽  
Water Resistance ◽  
Cement Mortar ◽  
Residential Buildings ◽  
Nano Titanium Dioxide

One of the growing concerns in the construction industry is energy consumption and energy efficiency in residential buildings. Moreover, management of non-degradable solid glass wastes is becoming a critical issue worldwide. Accordingly, incorporation of recycled expanded glass aggregates (EGA) as a substitution for natural fine aggregate in cement composites would be a sustainable solution in terms of energy consumption in the buildings and waste management. This experimental research aims to investigate the effects of EGA on fresh and hardened properties and thermal insulating performance of cement mortar. To enhance the mechanical properties and water resistance of the EGA-mortar, nano titanium dioxide (nTiO2) was used as nanofillers. The results showed an increase in workability and water absorption of the EGA-mortar. In addition, a significant decrease in bulk density and compressive strength observed by incorporating EGA into the cement mortar. The EGA-mortar exhibited a low heat transfer rate and excellent thermal insulation property. Furthermore, inclusion of nTiO2 increased compressive strength and water resistance of EGA-mortar, however, their heat transfer rate was increased. The results demonstrated that EGA-mortar can be integrated into the building envelop or non-load bearing elements such as wall partition as a thermal resistance to reduce the energy consumption in residential buildings.

scholarly journals Analysis of Prefabricated Systems in the Construction of Family Houses

TEM Journal ◽  
2020 ◽  
pp. 959-965
Author(s):  
Alena Tažiková ◽  
Juraj Talian ◽  
Jozef Galla
Keyword(s):  
Heat Transfer ◽  
Compressive Strength ◽  
Heat Transfer Coefficient ◽  
Fire Resistance ◽  
Structural Systems ◽  
The Family ◽  
Modern Methods ◽  
Different Types ◽  
The Moment ◽  
Family House

At the moment the human is trying to make the construction as efficient as possible, accelerate and facilitate the introduction of different types of innovations. Therefore, to the fore a new concept of prefabrication, which we call modern methods of construction MMC is coming. In this article, 3 prefabricated construction systems were chosen for the analysis of the construction of the family house. It is a system of Europanel SIP technology, CLT panels and ceramic panels. These are systems of euro panels' technology SIP, CLT panels and ceramic panels. The choice of construction systems has taken into account that all three systems fall under the MMC philosophy. Subsequently, selected parameters of individual structural systems were analysed, such as wall thickness, ceiling thickness, bulk density, compressive strength of walls, heat transfer coefficient, reaction to fire, fire resistance, usable area and price on a particular family house project.

Application of Coatings to Alleviate Fireside Corrosion on Heat Transfer Tubes during the Combustion of Low-Grade Solid Fuels: A Review

2020 ◽  
Vol 34 (10) ◽  
pp. 11752-11770 ◽  
Author(s):  
Xiuju Zhang ◽  
Huan Liu ◽  
Tongzhou Chen ◽  
Geyi Wang ◽  
Haiyan Li ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Solid Fuels ◽  
Low Grade ◽  
Fireside Corrosion

Thermal Conversion of Solid Fuels. Developments in Heat Transfer, Vol 15

2003 ◽  
Vol 56 (5) ◽  
pp. B74-B75 ◽  
Author(s):  
B Peters, ◽  
SR Gollahalli,
Keyword(s):  
Heat Transfer ◽  
Thermal Conversion ◽  
Solid Fuels

Cryogenic Compressive Strength and Thermal Deformation of Reinforced Polyurethane Foam Material for Membrane Type LNG Carrier

2018 ◽  
Vol 773 ◽  
pp. 30-39 ◽  
Author(s):  
Chang Yong Song ◽  
Doo Yeoun Cho
Keyword(s):  
Heat Transfer ◽  
Compressive Strength ◽  
Polyurethane Foam ◽  
Cryogenic Temperature ◽  
Thermal Deformation ◽  
Insulation Material ◽  
Test Results ◽  
Material Test ◽  
Membrane Type ◽  
Material Tests

LNG carrier is purposed to transport a liquefied LNG cargo which is reduced to 1/600 of volume in temperature condition of -163°C. In the context of structural performance on LNG cargo hold, the mechanical and thermal behaviors of insulation material under cryogenic temperature are considered as one of the critical factors for the hold design. This paper deals with the thermal deformation and the compressive strength of the reinforced polyurethane foam (RPUF) adapted for the insulation material of membrane type LNG carrier via both material tests and numerical simulations realizing the cryogenic condition. The material tests related to the thermal deformation are carried out to investigate the characteristics for thermal transfer on the actual RPUF specimen. The heat transfer simulations based on finite element analysis (FEA) are carried out using forced convection theory. The results of heat transfer analyses are compared to the material test results. Reasonable cryogenic conditions on RPUF are reviewed from both the analyses and the test results. In the regard of static material strength for the RPUF, the compressive material tests are carried out. The cryogenic temperature effect on the compressive strength of RPUF is evaluated by comparing to the room temperature material test results. From the compressive material tests, the effect of temperature on the ultimate compressive strength is investigated with variation of elongation.

scholarly journals New Mortar Mixes with Chemically Depolymerized Waste PET Aggregates

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Dora Foti ◽  
Michela Lerna
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Compressive Strength ◽  
Strength Properties ◽  
Mechanical Tests ◽  
Engineering Properties ◽  
Recycled Pet ◽  
Cement Pastes ◽  
Plastic Wastes ◽  
Heat Transfer Capacity

Nanoparticles are used in innovative mortars in order to improve their engineering properties. In this paper, recycled PET (polyethylene terephthalate) nanoparticles were used as a substitute for sand in mortars. PET aggregates were obtained cutting water bottles wastes into many small sized pieces and the plastic fibres were treated through chemical depolymerization process. Mortars with different percentages of PET were tested to determine their physical and mechanical (flexural and compressive strength) properties. Specific attention is given to the heat-transfer capacity of the cement pastes investigated. The results of the mechanical tests showed a reduction of the flexural and compressive strength values when the amount of PET nanoparticles increase. The thermal conductivity tests showed that chemically depolymerized PET nanoparticles derived from plastic wastes reduced the heat conduction capacity of the mortar. Therefore, the innovative mortars here tested can be considered for thermal insulation applications in the construction field with the advantage of recycling waste PET.

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