While much attention is often paid to the amount of waste materials that fill up landfills around the world or that make their way to become ocean contaminants, there is less attention to waste energy generation. Energy waste in the form of heat, light, vibration, noise, etc., has a cost due to the impacts of energy generation for which there is no return as well as the impacts of the waste energy on the systems around it (e.g., warming, wear and tear, mechanical erosion). The ability to capture this waste energy and find value-added uses is an important part of any design strategies for a sustainable product process, or system.