الفهرس 
Classification According to Construction
Classification According to Pass ArrangementsOnly 14 pages are availabe for public view
 |  | from | 119 |  |  |
| | | from | 119 | | |
Abstract
Heat transfer is one of the important processes in industrial applications as well as nuclear reactors, refrigeration and air conditioning systems, automotive industries, chemical processing,and food industries applications. As most of past work was conducted on the heat transfer process inside straight tubes and conventional helical coils, the different shapes of the coils were suggested in a spiral way.