Design and performance evaluation of a device for determination of specific heat capacity of thermal insulators

Etuk, Sunday Edet; Robert, Ubong Williams; Agbasi, Okechukwu Ebuka

doi:10.1186/s43088-020-00062-y

Cited by 9 publications

(7 citation statements)

References 4 publications

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“…The temperature of the boiling water was measured and recorded after the calorimeter was brought to a boil. 12,28,30 The ceiling sample was quickly transferred to the calorimeter's water. The water was continuously but gently stirred, and the highest temperature was reached.…”

Section: Thermo-physical Propertiesmentioning

confidence: 99%

Production and thermo-structural analysis of a hybridized natural fibre-based ceiling board for building applications

Jeremiah Lekwuwa,

Jude Ebieladoh,

Anthony Emeka

et al. 2023

Advances in Mechanical Engineering

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Canewood and palm kernel fibre (PKF) have successfully been used as filler material for producing ceiling boards, with recycled low-density polyethylene (LDPE) as the binder. This work covered three aspects which are the optimization of process and production parameters, chemical, and thermal analysis of the utilized filler material. The production parameters considered are the percentage composition of both the binder and filler material while the process parameters studied are the press temperature, pressure and time. These parameters were optimized over both physical and thermal properties of the developed ceiling board which are thermal resistivity, water absorption and thickness swell. Thermal results for both the cane wood and PKF proved to be thermally stable up to temperatures as high as 325 and 310°C, respectively. The optimized ceiling board showed a thermal resistivity, water absorption and thickness swell of 16.192 W/M.K, 4.669 and 6.594% respectively, for a production and process parameters of 15% cane wood, 10% PKF, 75% LDPE, 6 min press time, 7 bar pressure and 198°C press temperature. The produced ceiling board showed a specific heat capacity, thermal energy and heat flux of 769.23 Jkg−1K−1, 60 W and 23.07 kWm−1 respectively. The findings imply that the LDPE filler materials are appropriate for use in ceiling board applications.

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Section: Thermo-physical Propertiesmentioning

confidence: 99%

Production and thermo-structural analysis of a hybridized natural fibre-based ceiling board for building applications

Jeremiah Lekwuwa,

Jude Ebieladoh,

Anthony Emeka

et al. 2023

Advances in Mechanical Engineering

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“…Also, modeling of cooling rate function was performed by means of Origin software (Version 2019). The data obtained were used to compute thermal conductivity based on the relation [36,38] 𝑘 = ( Specific heat capacity was determined by employing SEUR'S apparatus [39]. In this case, the system consisted of aluminum plate and plywood plate (each of which measured 60 mm x 60 mm x 8 mm) as additional heat exchange accessories to plate of the sample under test.…”

Section: Thermal Conductivity and Specific Heat Capacitymentioning

confidence: 99%

Thermophysical properties plaster of Paris ceilings reinforced with oil palm mesocarp fiber for building design

Armstrong Udochukwu Anonaba,

Francis Chukwuemeka Eze,

Israel Chukwuemeka Ndukwe

2023

World J. Adv. Res. Rev.

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This research focused on how to solve disposal problem associated with oil palm mesocarp fiber by using it to modify plaster of Paris (POP) ceiling. Untreated oil palm mesocarp fiber (UOPMF) and treated oil palm mesocarp fiber (TOPMF) were separately utilized at various weight fractions to fabricate ceiling samples with the POP. The samples were developed in triplicates, dried completely and then tested for their thermophysical propertiess. Samples with varied thicknesses were also prepared for investigation of heat flow time. The results showed changes in mean values of water absorption (12.22 – 25.75) %, bulk density (1.768 – 1.407) 103 kgm-3, thermal conductivity (0.2245 – 0.1465) Wm-1K-1, specific heat capacity (1.498 – 1.825) 103 Jkg-1K-1, thermal diffusivity (8.477 – 5.705) 10-8 m2s-1, and solar radiation absorptivity (20.71 – 25.25) m-1 as the fraction of the UOPMF increased from 0 % to 40 %. In the case of utilizing the TOPMF, the respective changes were found to be (12.22 – 31.33) %, (1.768 – 1.477) kgm-3, (0.2245 – 0.1627) Wm-1K-1, (1.498 – 1.789) 103 Jkg-1K-1, (8.477 – 6.164) 10-8 m2s-1, and (20.71 – 24.20) m-1. Heat flow time related positively with the thickness of the samples. Though it was revealed that all the samples could perform better than conventional ceilings like asbestos and polyvinyl chloride, the UOPMF exhibited a greater potential than the TOPMF for improving thermal insulation performance of the samples. Hence, recycling the mesocarp fiber in the described manner could ensure availability of cost-effective and more thermally-efficient POP ceilings for building design.

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“…The specific heat capacity of the samples was investigated with the aid of SEUR'S apparatus [51]. Aluminum plate and plywood plate measuring 60 mm x 60 mm x 8 mm were used with the sample plate as heat exchange accessories.…”

Section: Specific Heat Capacity and Thermal Conductivitymentioning

confidence: 99%

Assessment of Properties of Composite Boards from Groundnut Shells and Sawdust for their suitability for Structural Applications

Nathaniel,

Ekpenyong,

Zanders Akaolisa

et al. 2023

ETJ

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Sawdust and groundnut shells created sustainable composite boards.• Reusing waste reduces environmental impact. • Composite boards have superior thermal properties. • Boards are created inexpensively using waste to protect the environment.Groundnut shells and sawdust are generated in vast quantities yearly but underutilized. In developing countries, this situation leads to their disposal by unplanned landfilling, indiscriminate dumping, or open burning as ineffective solid waste management systems persist. Such practices constitute severe environmental problems that need to be urgently tackled. In this work, composite boards were fabricated from groundnut shell particles (GSP) and sawdust particles (SDP) at varying volumetric proportions of 0%, 25%, 50%, 75%, and 100 % using Topbond as a binding agent. The boards were dried completely and then assessed for water absorption, bulk density, thermal conductivity, specific heat capacity, thermal diffusivity, thermal inertia, availability, and flexural strength. The results revealed improvement in the samples' thermal insulation performance as the SDP proportion increased from 0% to 100%. Though samples fabricated with 50 % each of the SDP and GSP exhibited a balance in the thermophysical and mechanical properties, all the samples could ensure better thermal insulation than conventional ceilings such as Isorel and plywood. Generally, the samples can be used as ceiling panels or partition elements in building design. This idea of utilizing groundnut shells and sawdust to develop composite panels for building purposes, as described herein, has been reported for the first time. It could help to ensure the construction of affordable and thermally safe buildings while solving the problems associated with their disposal.

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Design and performance evaluation of a device for determination of specific heat capacity of thermal insulators

Cited by 9 publications

References 4 publications

Production and thermo-structural analysis of a hybridized natural fibre-based ceiling board for building applications

Production and thermo-structural analysis of a hybridized natural fibre-based ceiling board for building applications

Thermophysical properties plaster of Paris ceilings reinforced with oil palm mesocarp fiber for building design

Assessment of Properties of Composite Boards from Groundnut Shells and Sawdust for their suitability for Structural Applications

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