Energy
Effect of Diesel-engine Operating Conditions on Performance of Waste Heat Recovery Cycles: A 4E Analysis

B. Alizadeh Kharkeshi; R. Shafaghat; S. Talesh Amiri; A. M. Tahan; A. Ardebilipour

Volume 15, Issue 3 , July 2024, , Pages 220-234

https://doi.org/10.5829/ijee.2024.15.03.01

Abstract
  In waste heat recovery from a heavy-duty diesel engine, with a focus on engine speed's impact, is explored. The critical problem of enhancing energy efficiency and reducing emissions through waste heat utilization is addressed. Waste heat in internal combustion engines, vital for sustainable energy use ...  Read More

Energy
Design Optimization of a Permanent Magnet Generator for Direct Drive Wind Turbine

A. Jabbari; M. Basaki; M. R. Sheykholeslami

Volume 15, Issue 3 , July 2024, , Pages 248-254

https://doi.org/10.5829/ijee.2024.15.03.03

Abstract
  In this paper, an axial flux permanent magnet generator for a 30 kW direct drive wind turbine is designed and the design parameters were optimized with the aim of achieving high efficiency. In order to reduce the cogging torque and electromagnetic torque ripple components, the air core topology has been ...  Read More

Energy
Investigating the Effects of Blockage Ratio on the Performance of a Surface-piercing Propeller in Free Surface Water Tunnel Tests

M. Beykani; R. Shafaghat; A. Yousefi

Volume 14, Issue 2 , April 2023, , Pages 139-152

https://doi.org/10.5829/ijee.2023.14.02.06

Abstract
  This paper investigates the effect of the immersion ratio parameter on the hydrodynamic performance of three surface-piercing propellers with diameters of 0.125, 0.132 and 0.140m at different advancing speeds. Experimental tests have been carried out in the free surface water tunnel of the Babol Noshirvani ...  Read More

Energy
Experimental Study to Investigate Effect of Pitch Ratio and Number of Blades on Hydrodynamic Performance of Surface Piercing Propellers

A. Yousefi; R. Shafaghat; M. Beykani; A. Aghajani Afghan; S. T. Seyyed Mostafa

Volume 14, Issue 1 , January 2023, , Pages 26-37

https://doi.org/10.5829/ijee.2023.14.01.04

Abstract
  Surface piercing propellers are special supercavitation propellers operating at free surface. These propellers are designed to have the best performance at the highest speed. The geometric parameters of the number of blades and the pitch ratio will significantly impact the critical advance coefficient ...  Read More

Energy
Experimental Evaluation of the Effect of Incident Wave Frequency on the Performance of a Dual-chamber Oscillating Water Columns Considering Resonance Phenomenon Occurrence

R. Shafaghat; M. Fallahi; B. Alizadeh Kharkeshi; M. Yousefifard

Volume 13, Issue 2 , March 2022, , Pages 98-110

https://doi.org/10.5829/ijee.2022.13.02.01

Abstract
  This paper has experimentally investigated the performance of a dual-chamber oscillating water columns (OWC) imposed on Caspian Sea wave’s characteristics. Experimental runs were performed for three water draft depths of 10, 15, and 20 cm and eight wave frequencies ranging from 0.4 to 0.7 Hz. Also, ...  Read More

Evaluation of Different Glazing Materials, Strategies, and Configurations in Flat Plate Collectors Using Glass and Acrylic Covers: An Experimental Assessment

M. Ameri; H. Farzan; M. Nobari

Volume 12, Issue 4 , October 2021, , Pages 297-306

https://doi.org/10.5829/ijee.2021.12.04.03

Abstract
  Glass plates have been commonly used as collectors’ covers due to technical feasibility, high transmissivity in shortwave solar irradiation, and low transmissivity in long-wavelengths. However, they are vulnerable to stones and hail. Plastic plates have high transmissivity in shortwaves but also ...  Read More