Design of Mechanical and Thermal Systems
Thermodynamic analysis of hybrid-nanofluids-zeotropic mixtures in a vapour compression refrigeration system (VCRS) based on exergy principles

Aniekan Essienubong Ikpe; Ekpenyong Akanimo Udofia; Emmanuel Odeh

Volume 12, Issue 2 , June 2023, , Pages 143-154

https://doi.org/10.22105/riej.2023.383806.1365

Abstract
  Cooling refrigeration systems ingest prime energy and contribute to universal negative impact due to ecologically unfavorable working fluids used. Hence, the quest to improve the performance of Vapour Compression Refrigeration System (VCRS) with more efficient and eco-friendly refrigerant such as nanoparticles ...  Read More

Design of Mechanical and Thermal Systems
Design and Development of a Wind Turbine with Flanged Diffuser Operating in Low Wind Speed Regime

Ekpenyong Akanimo Udofia; Aniekan Essienubong Ikpe; Victor Etok Udoh

Volume 11, Issue 4 , December 2022, , Pages 366-377

https://doi.org/10.22105/riej.2022.364299.1341

Abstract
  In this paper, the performance characteristics of a fabricated horizontal axis wind turbine with and without flanged diffusers were studied using wind tunnel experiment. Measurements of global parameters (power, torque, rotational speed efficiency, etc.) were carried out at wind speed regime between ...  Read More