Abdul Jabbar N. Khalifa

EDUCATION

PhD Mechanical Engineering, Cardiff University, U.K.

RESEARCH INTERESTS

Heat transfer, Renewable Energy

RECENT SCHOLAR PUBLICATIONS

Assessing The Impact of Transforming Solar Panels from Photovoltaic to Thermal Photovoltaic Systems Within the Iraqi Climate and Studying the Effect of Force Convection
MK Ahmed, AJN Khalifa
Sustainable Engineering and Technological Sciences 1 (01), 34-43 2025



Transforming Traditional Photovoltaic Panels into Thermal/ Photovoltaic Panels Incorporating Composite-Phase Change Materials
MK Ahmed, AJN Khalifa
Al-Nahrain Journal for Engineering Sciences 27 (3), 320-327 2024



Improving the Thermal Properties of Phase Change Materials Using Different Types of Additives: A Review
MK Ahmed, AJN Khalifa
Library Progress International 44 (2), 1475-1499 2024



PV And PV/T Efficiency Enhancement Using Different Materials: A Review
MK Ahmed, AJN Khalifa
Library Progress International 44 (2), 1512-1550 2024



Applications of phase change materials in solar water heating systems: A review
YF Taha, AJN Khalifa
World Journal of Advanced Engineering Technology and Science 8 (2), 78-85 2023



Experimental investigation of the evacuated tube under Iraqi weather conditions utilizing first and second laws efficiency
YF Taha, AJN Khalifa
Global Journal of Engineering and Technology Advances 14 (3), 25-32 2023



Modeling of the charging process of an evacuated tube using CFD in the climatic conditions of Iraq
YF Taha, AJN Khalifa
International Journal of Latest Engineering and Management Research 8 (2 2023



TEMPERATURE STRATIFICATION IN A THERMAL STORAGE TANK: THE EFFECT OF FLOW RATE AND ASPECT RATIO
FA KHAMMAS, AT MUSTAFA, AJN KHALIFA
Journal of Engineering Science and Technology 16 (2), 1066 - 1081 2021



Optical Properties of Carbon Doped by Nano Particle Titanium Dioxide to Enhance Solar Energy Absorption
RN Abed, NK Al-Sahib, AJN Khalifa
Nanomedicine & Nanotechnology Open Access 5 (2), 1-9 2020



Energy Gap Demeanor for Carbon Doped with Chrome Nanoparticle to Increase Solar Energy Absorption
RN Abed, NK Al-Sahib, AJN Khalifa
Progresss in Color, Colorants and Coatings 13 (3), 143-154 2020



Optical Study to Doping Carbon With TiO2 That Utilizing in Thermal Concentration
RN Abed, NK Al-Sahib, AJN Khalifa
Oriental Journal of Physical Sciences 2 (2), 109-113 2017



Utilizing nano-material in selective surfaces to scalable up the absorptivity
RN Abed, NK Al-Sahib, AJN Khalifa
International Journal of Research in Engineering and Innovation 1 (3), 142-149 2017



Comparison of Heat Transfer Coefficients in Free and Forced Convection using Circular Annular Finned Tubes
AJN Khalifa, IRA Almousawi
International Journal of Application or Innovation in Engineering 2016



Effect of parabolic solar energy collectors for water distillation
T Arunkumar, R Velraj, A Ahsan, AJN Khalifa, S Shams, D Denkenberger, ...
Desalination and Water Treatment 57 (45), 21234-21242 2016



Effect of Volume Fraction of γ‐Al₂O₃ Nanofluid on Heat Transfer Enhancement in a Concentric Tube Heat Exchanger
AJN Khalifa, MA Banwan
Heat Transfer Engineering 36 (16), 1387-1396 2015



Natural convection heat transfer from a single and multiple heated thin cylinders in water
AJN Khalifa, ZA Hussien
Heat and Mass Transfer 51, 1579-1586 2015



Indoor tests on the effect of wind speed on still performance
AJN Khalifa, MAW Ali
INTERNATIONAL JOURNAL OF ENERGY AND ENVIRONMENT 6 (3), 299-308 2015



Natural convection in a room with two opposite heated vertical walls
A Saad, AJN Khalifa
Journal homepage: www. IJEE. IEEFoundation. org 6 (1), 81-86 2015



Natural Convection Heat Transfer from a Heat Sink with Fins of Different Configuration
M Ahmed, AJN Khalifa
International Journal of Innovation and Applied Sciences 9 (3), 1043 2014



Indoor tests to investigate the effect of brine depth on the performance of solar still
MAW Ali, JN Khalifa
International Journal of Energy and Environment (Print) 4 2013

MOST CITED SCHOLAR PUBLICATIONS

Validation of heat transfer coefficients on interior building surfaces using a real-sized indoor test cell
AJN Khalifa, RH Marshall
International Journal of Heat and Mass Transfer 33 (10), 2219-2236 1990
Citations: 294



Natural convective heat transfer coefficient—a review. I. Isolated vertical and horizontal surfaces
AJN Khalifa
Energy conversion and management 42 (4), 491-504 2001
Citations: 251



On the effect of cover tilt angle of the simple solar still on its productivity in different seasons and latitudes
AJN Khalifa
Energy conversion and management 52 (1), 431-436 2011
Citations: 196



Effect of two-axis sun tracking on the performance of compound parabolic concentrators
AJN Khalifa, SS Al-Mutawalli
Energy conversion and management 39 (10), 1073-1079 1998
Citations: 187



Natural convective heat transfer coefficient–a review: II. Surfaces in two-and three-dimensional enclosures
AJN Khalifa
Energy conversion and management 42 (4), 505-517 2001
Citations: 183



Testing of the performance of a fruit and vegetable solar drying system in Iraq
KEJ Al-Juamily, AJN Khalifa, TA Yassen
Desalination 209 (1-3), 163-170 2007
Citations: 181



A storage domestic solar hot water system with a back layer of phase change material
AJN Khalifa, KH Suffer, MS Mahmoud
Experimental Thermal and Fluid Science 44, 174-181 2013
Citations: 163



A comparative performance study of some thermal storage materials used for solar space heating
AJN Khalifa, EF Abbas
Energy and Buildings 41 (4), 407-415 2009
Citations: 162



On the verification of the effect of water depth on the performance of basin type solar stills
AJN Khalifa, AM Hamood
Solar Energy 83 (8), 1312-1321 2009
Citations: 155



Effect of insulation thickness on the productivity of basin type solar stills: an experimental verification under local climate
AJN Khalifa, AM Hamood
Energy Conversion and Management 50 (9), 2457-2461 2009
Citations: 132



An experimental study on modified simple solar stills
AJN Khalifa, AS Al-Jubouri, MK Abed
Energy conversion and management 40 (17), 1835-1847 1999
Citations: 100



Performance correlations for basin type solar stills
AJN Khalifa, AM Hamood
Desalination 249 (1), 24-28 2009
Citations: 73



Conventional versus storage domestic solar hot water systems: A comparative performance study
AJN Khalifa, RAA Jabbar
Energy Conversion and Management 51 (2), 265-270 2010
Citations: 59



Effect of inclination of the external reflector on the performance of a basin type solar still at various seasons
AJN Khalifa, HA Ibrahim
Energy for Sustainable Development 13 (4), 244-249 2009
Citations: 59



Experimental study of temperature stratification in a thermal storage tank in the static mode for different aspect ratios
AJN Khalifa, AT Mustafa, FA Khammas
ARPN Journal of Engineering and Applied Sciences 6 (2), 53-60 2011
Citations: 54



Forced versus natural circulation solar water heaters: A comparative performance study
AJN Khalifa
Renewable energy 14 (1-4), 77-82 1998
Citations: 53



Effect of inclination of the external reflector of simple solar still in winter: An experimental investigation for different cover angles
AJN Khalifa, HA Ibrahim
Desalination 264 (1-2), 129-133 2010
Citations: 52



Evaluation of different hybrid power scenarios to Reverse Osmosis (RO) desalination units in isolated areas in Iraq
AJN Khalifa
Energy for Sustainable Development 15 (1), 49-54 2011
Citations: 48



Thermal performance of locally made flat plate solar collectors used as part of a domestic hot water system
AJN Khalifa
Energy conversion and management 40 (17), 1825-1833 1999
Citations: 46



Effect of parabolic solar energy collectors for water distillation
T Arunkumar, R Velraj, A Ahsan, AJN Khalifa, S Shams, D Denkenberger, ...
Desalination and Water Treatment 57 (45), 21234-21242 2016
Citations: 41