The objective of our study is to numerically and experimentally simulate the CPC operation according to three different values of the mirror reflectance coefficient. The study not only showed the importance of mirror reflectance in the performance of solar collectors but also est...
Open access
Research Article10.9734/ajopacs/2023/v11i3202
Using propagation models helps with communication system planning and maximizes the use of the radio spectrum, a limited natural resource. Here is a comparative analysis between some propagation models and actual measurements from Yenagoa, Southern Nigeria. Electric field strengt...
Open access
Research Article10.9734/ajopacs/2023/v11i2200
Evaluation of Radionuclide contents of suspended particulate matter from two quarry sites in Nigeria, have been carried out using High Volume air sampler and Gamma ray spectrometer NaI (Tl) Detector. The results obtained showed the mean value for 226 Ra, 232Th and 40k for Ishiagu...
Open access
Research Article10.9734/ajopacs/2023/v11i2199
Using the fluid dynamics model, we studied the formation of graphene surface plasma when the charge is tilted to the graphene sheet for motion. We calculated the electron energy loss spectrum of electrons at different angles and proved that the resonance in the spectrum is relate...
Open access
Research Article10.9734/ajopacs/2023/v11i2198
As monitoring preclinical MRI is essential, it is important that the equipment used must be MRI-compatible. This is because interaction with an MRI radiofrequency (RF) transmitting field can cause RF burns due to inappropriate equipment. And non-compatible MRI monitoring equipmen...
Open access
Research Article10.9734/ajopacs/2023/v11i2196
Reservoir characterization of W-field, onshore Niger Delta was carried out using petrophysical evaluation of well logs. Three reservoir sand intervals (A, B, C) were identified and correlated across four wells (W1, W2, W3, W4) in W-field using the gamma ray, while the fluid ident...
Open access
Research Article10.9734/ajopacs/2023/v11i2197
Titanium dioxide is hard to coat on glass or boehmite at low pH. In this study, a method to coat titanium dioxide functionalized by Ag on the glass surfaces using a Cu-containing solution is proposed. This method facilitated the coating of titanium dioxide functionalized by Ag on...
Open access
Research Article10.9734/ajopacs/2023/v11i1195
An external background ionization radiation was carried out in Our Lady Health of the sick hospital, Colworth Medical and Olive Tree Medical Diagnostics Port Harcourt. The background radiation reading was taken using the radiation alert meter (Digilert 200). The estimated value f...
Open access
Research Article10.9734/ajopacs/2023/v11i1194
In this study iron oxide (Fe2O3) nanoparticle samples was prepared using mechanical grinding method. The optical properties were studied using UV-Vis spectrophotometer within a range of 200-1100nm. The micro and crystalline size of the nanoparticle were studied using x-ray diffra...
Open access
Research Article10.9734/ajopacs/2023/v11i1193
We have examined film condensation in a channel whose walls are covered with porous media numerically. The transfers in the porous medium and the liquid film are respectively described by the Darcy-Brinkman-Forchheimer model and the equations of the hydrodynamic and thermal bound...
Open access
Research Article10.9734/ajopacs/2023/v11i1192
In this work, we present a numerical study of the thermal behavior of a hollow block with or without phase change material (PCM) in the Sahelian zone. The PCMs used in this study are RT27 paraffin and hydrated salt with a melting temperature of 27°C and 29.9°C respectively and a...
Open access
Research Article10.9734/ajopacs/2023/v11i1191
Aim: A subsurface geotechnical investigation was carried out for the purpose of establishing the depth of competent soil for foundation design and construction of a one-storey building. Study Design: The study was aimed at assessing the subsoil competence for a foundation design...
Open access
Research Article10.9734/ajopacs/2022/v10i4188
In the current energy context, geothermal systems are highly developed in the building field. Among these interesting systems on the energy plan, one finds in particular the earth-to-air heat exchanger commonly called ‘Canadian or Provençal well’. It consists of tubes buried in...
Open access
Research Article10.9734/ajopacs/2022/v10i4189
A numerical study of the natural heat and mass transfer in a cavity with a straight isoscele cross-section containing air is made in this paper. The two inclined side walls are kept in natural convection with the surrounding environment. The upper horizontal wall is subjected to...
Open access
Research Article10.9734/ajopacs/2022/v10i4190
This study seeks to propose a new model of hearth for the consumption of biogas produced by a biodigester of 4 m-3. The cylindrical furnace is used to heat an empty pot for 3 hours. To do this, the system is subdivided into two sub-systems, the first is the flame, which heats the...
Open access
Research Article10.9734/ajopacs/2022/v10i4187