An Optimized Thermal Analysis of Electronic Unit Used in Aircraft


  • Asad Naeem Shah
  • Faisal Mir
  • Muhammad Farooq


In a field where change and growth is inevitable, new electronic packaging problems continuously arise. Smaller, but more powerful devices are prone to overheating causing intermittent system failures, corrupted signals and outright system failure. Current study is focused on the analysis of the optimized working of electronic equipment from thermal point of view. In order to achieve the objective, an approach was developed for the thermal analysis of Printed Circuit Board (PCB) including the heat dissipation of its electronic components and then removal of the heat in a sophisticated manner by considering the conduction and convection modes of heat transfer. Mathematical modeling was carried out for a certain problem to address the thermal design, and then a program was developed in MATLAB for the solution of model by using Newton-Raphson method. The proposed unit is to be mounted on an aircraft having suspected thermal characteristics owing to abrupt changes in pressure and temperature as aircraft moves quickly from a lower altitude to higher altitude. In current study, dominant mode of heat transfer was conduction revealing that the major portion of heat transfer takes place by copper cladding and that heat conduction along the length of PCB can be improved enormously by using even thin layer of copper. The results confirmed that temperatures of all the electronic components were within derated values. Meanwhile, it was known that convection also plays a significant role in the reduction of temperatures of the components. The reduction in nodal temperature was in the range of 13 to 42 %. Furthermore, altitude variation from sea level to 15240 m (above sea level) caused the reduction in pressure from 1atm to 0.1095 atm. Consequently, the temperature of the electronic components increased from 73.25oC to 83.83oC for first node ‘a’, and from 66.04oC to 68.47oC for last node 'n' because of the decrease in the convective heat transfer coefficient.


Victoria Policy Institute, (Sep.2007). Encouraging Alternatives to Driving to School, in: Online TDM Encyclopaedia, Retrieved from

Litman, T. (2007) Accessible Schools Provide Many Community Benefits, in:TDM Encyclopedia, Victoria Transport Policy Institute, Canada. Retrieved from

Malik, M. H. (2000), School Parking Problems, A case study of Beacon house, city schools, Islamabad, national transport research centre, Islamabad.

World Commission on Environment and Development (1987) Our Common Future: Towards Sustainable Development. In UN Documents: Gathering a body of global agreements. Retrieved from [Accessed on 15-12-2010].

TDM Encyclopedia (2010) Sustainable transportation and TDM: Planning that balances economic, social and ecological objectives, Victoria Transport Policy Institute, retrieved from [ Accessed on 16-02-2011].

Thomas Randall (2003) Sustainable Urban Design: An environmental approach. Spon Press New York (p.26).

Schiller Preston L, Bruun Eric & Litman Todd (2010) An Introduction to Sustainable Transportation, Earthscan, Global Investor Bookshop, retrieved from [Accessed on 16-02-2011]

WHO, Europe (2008)

Paik, A. (1998) Why Kids don’t Walk to School: Car Centred Land Use Makes it a Risky Trek, The News and Observer Publishing Company: Raleigh.

Meaton, J. & Kingham, s. (1998) Children’s Perception of Transport Modes: Car Culture in a Classroom? World Transport Policy and Practice. Vol. 4, No. 2, pp. 12-16

Wenban-Smith, J. (1997) safe routes to Schools. Transport Retort, Vol. 20, No. 6 pp.12-13.

Ridgewell Claire, Sipe Neil &Buchanan Nick.( 2005) School Travel Modes in Brisbane,Urban Research Program. Griffith University. retrieved from http://www. griffith. centre/urp.

Engwicht, D. (1992) Towards an Eco-city: Calming the Traffic. Envirobook, Sydney

Collins, D. & Kearns, R. (2001), The Safe Journeys of an Enterprising School: Negotiating Landscapes of Opportunity and Risk.Health and Place, Vol. 7, pp. 293-306

Frank, L., Engelke, P. & Schmid, T. (2003) Health and Community Design: The Impact of the Built Environment on Physical Activity. Island Press: Washington DC

Ussher, S. (2004) A Ticket to a Sustainable Future for the Walking School Bus Programme: An Evaluation of the Long-Term Durability of the Initiative within the Christchurch Context. Unpublished Master of Arts Thesis: University of Canterbury.

Sustrans (1999) Safe Routes to Schools. Information Sheet, FS01. Sustrans, Bristol.

Crime Correspondent, The News, 2010, Transport system to be improved in capital , article published in International The News, Dec. 7, 2010

CLEAN (2009) Ambient Air Monitoring for Islamabad December 2009,Pakistan Environmental Protection Agency, Ministry of Environment, Government of Pakistan.

Pakistan Environmental Protection Agency (Pak-EPA), Ministry of Climate Change, Islamabad.

Ministry of Environment, Government of Pakistan, National Environmental Quality Standards for Motor Vehicle Exhaust and Noise, Gazette of Pakistan. August 20






Mechanical Engineering, Automotive, Mechatronics, Textile, Industrial and Manufacturing Engineering