This paper investigates the development and application of thermoelectric (TE) modules, particularly focusing on their integration into floating city architectures to address unique energy demands and sustain-ability challenges. TE modules, which operate on the Seebeck effect, convert thermal gradients directly into electricity. Despite existing challenges, such as the cost and performance limitations of current TE materials, recent advancements have improved their properties, making them viable for practical applications. The focus of this study is on testing the performance of TE modules, including their mechanical properties, Seebeck coefficient, and electrical and thermal conductivity. These are all very important for improving the output power and energy conversion efficiency. The paper also investigates the innovative use of TE modules in floating cities to enhance energy independence through waste heat recovery and direct heat-to-electricity conversion, thereby supporting sustainable and autonomous urban ecosystems. The potential of TE modules for building materials and thermal management in floating cities is also dis-cussed, providing a path forward for resilient and energy-efficient urban development.