The term "heat exchanger" refers to a device that transfers heat from one fluid to another. Shell and tube heat exchangers have a wide range of applications in the sectors of petroleum and industrial applications due to their improved heat transfer properties. This project was created to gain a better understanding of the shell and tube heat exchanger's precise design and performance using energy and mass conservation rules. To provide the system with the necessary hot water, solar water heating system techniques were deployed. One of these methods was to use an evacuation tube solar heating system, which is a more effective means of supplying hot water to this system. To improve the system's performance, correct material selection for the shell and tube construction, as well as the flow pipe network, was taken into account based on local market availability. Furthermore, the implemented design was evaluated for cost-effectiveness, simplicity, execution, and sustainability in Medina climate circumstances. The heat exchanger efficacy, performance, and vacuum tube efficiency were all determined to be in very acceptable and cost-effective levels. Furthermore, vacuum tube solar water heating was shown to be a clean and safe renewable energy source. Finally, a full investigation of the system's efficacy was undertaken, with the heat exchanger's outlet temperature ranging from 44 to 50oC, while the vacuum tube's exit temperature was enhanced.
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