||With the rapid development of retail business in recent years, there are many warehouse stores, franchise stores and restaurants, which attempt to use computer to manage their merchandise. Except for the function of a traditional Electronic Cash Register (ECR), it also integrates with goods data management, customer data management, stock management and credit card consumption function now. In order to coordinate with related hardware, the operation speed of system is getting more and more important. In other words, wattage is getting higher too. For example, cash register, scanner, printer, monitor and so on.
Point of sale (POS) device which has to possess excellent thermal management within a limited space is needed for outline size and protective level. Therefore, if heat dissipation is not designed correctly for high wattage systems, it will cause equipment instability, reduce machine lifetime and crash frequently. For these reasons, the thermal management design of electronics equipments is very important.
The main purpose of this project is to focus on the thermal management research of POS device. A heat sink is designed for CPU placed in turbulent air flow. The shape of the heat sink is optimized to achieve sufficient cooling in forced convection heat transfer. The design is conducted in CAD modeler Pro/E. CFD simulation is conducted in Flotherm to study the heat transfer and fluid flow pattern around the heat sink and CPU temperature. Eventually, simulation data will be used for optimization the heat dissipation process of whole POS device system.