EFFECT THE FORM OF PERFORATION ON THE HEAT TRANSFER IN THE PERFORATED FINS
Journal Title: Academic Research International - Year 2013, Vol 4, Issue 3
Abstract
Extended surface heat exchangers are easy in construction and extensively use in many of the industries. Continuous research is going on to improve its effectiveness by reducing the thermal boundary layer thickness and increasing the heat transfer surface area. Perforations in the fins one way that used to improve its effectiveness. An experimental study submitted to investigate the heat transfer by natural convection in a rectangular perforated fin plates. Five fins used in this work first fin non-perforated and others fins perforated by different shapes these fins perforation by different shapes (circle, square, triangle, and hexagon) but these perforations have the same cross section area(113 mm 2 . These perforations distributed on 3 columns and 6 rows. Experiments produced through in an experimental facility that was specifically design and constructed for this purpose. The results show that the drop in the temperature of the non-perforated fin from 72 to 57 o C while the temperature drop in perforated fins, atthe same power supplied (126 W) was (72-52 o C), (72-51.5 o C), (72-50 o C) and (72 -48 o C) for shapes (hexagonal, square, circular and triangular) respectively Figure(9). The largest value of RAF at triangular perforation and the smaller value occurred in circular perforation. Also, triangular perforation gives best values of heat transfer coefficient and then the circular, square, hexagonal, and non-perforation respectively.
Authors and Affiliations
Raaid R. Jassem
Keywords
Related Articles
- EP ID EP135858
- DOI -
- Views 109
- Downloads 0
INFLUENCE OF EMPLOYER’S PROVIDED ON-THE-JOB TRAINING ON EMPLOYEES’ WAGE GROWTH AND JOB PERFORMANCE: AN EMPIRICAL EVIDENCE OF TELECOMMUNICATION INDUSTRY OF PAKISTAN*
This study examines the impact of on-the-job training (OJT) on job performance. Variables were selected from existing research studies to assess the effects of OJT on job performance of employees. The researcher uses d...
Decent Work Trends and Work Life Quality among Rural Communities of District Jhang, Pakistan
In Pakistan, where 70% labor force is the part of informal economy, making sure the quality and quantity of available work can lead to poverty alleviation. Pakistan has entered into agreement with International Labor Or...
EVALUATION OF NATURAL RADIONUCLIDE CONTENT IN SURFACE AND GROUND WATER AND EXCESS LIFETIME CANCER RISK DUE TO GAMMA RADIOACTIVITY
The objective of this study is to evaluate the radionuclide content of the surface and ground water around oilfields and their host communities and finally assess the excess lifetime cancer risk associated with them. A t...
From Reaction to Pro-action in Zimbabwe: The Bulalima – Mangwe Districts Drought Coping and Reduction Experience1
Disaster risk reduction as a strategy is increasingly gaining prominence in development discourse within the context of a paradigm shift from post-disaster relief and reconstruction to pre-disaster prevention and...
Synergistic Effect of Eucalyptus (Eucalyptus Camaldulensis) and Guava (Psidium Guajava) Ethanolic Extracts on Eschericia Coli and Staphylococcus Aureus
In-vitro antibacterial activities of the ethanolic leaf extracts of Eucalyptus camaldulensis and Psidium guajava and their combination were evaluated against Staphylococcus aureus, gram positive bacteria and Escherichia...