الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
This thesis deals wi th a study of pressure effect on tbe mean film coefficient of beat transfer in case of air flowing inside a horizontal tube.
A tbeoretical investigation bas been made to study tbe effect of physical properties on tbe air mean film coefficient of beat transfer at different pressures. An experimental .Det has been designed and cons¬tructed, in the heat transfer laboratory Alexandria Faculty of engineering,to verify the tberoretical study. The heart of tbe experimental work is a single tube inside tube heat exchanger witb a~r and water as working
fluids. The experimental results are compared V11tb. both the provious ’uudtho.dJrGsent thoor~tical findings. Economical analysis has been made in order to compare the gUn in heat. e;;:change VJi th extra power needed for cirulating the fluid under the required working pressure~