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Electro Mechanical Design of Cheap CNC XY PLOTTER
The CNC XY Plotter is required to plot two dimensional continuous or discontinuous data on a rectangular coordinate system. This project is done to fabricate a XY plotter using independent motion along X-direction and Y-direction, and microcontroller system (Arduino) to control those motions. Implementation of this project is carried out through the computer linked with the Arduino software, to which the G-code is transmitted by the Processing software. The plotter has been fabricated with cheap and available materials, retaining the accuracy and efficiency. [DOI]
Shell and Tube Heat Exchanger
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This project presents an attempt to optimize a shell and tube heat exchanger. We chose to design a U-tube shell and tube heat exchanger with one shell and two tube pass. While designing the heat exchanger in our project we provided the feed water in the shell side to cool down the engine oil that was supplied in the tube side. SOLIDWORKS was used as the software for designing the physical model and for the thermal calculations necessary for design optimization we used HTRI. We used TEMA type AEU as the standard in our project design. In practical applications pressure drop due to fouling in heat exchangers is the major factor which directly affects the performance of the heat exchanger. The effect of mass flow rate and fouling variations on other thermal parameters such as overall heat transfer coefficient, fouled heat transfer coefficient, film heat transfer coefficient, and heat exchanged and over design was analyzed in our project. The calculation has been iterated and compared manually as well as by using a software.
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