After discussing in my last two articles how digital twins can revolutionize the energy industry and how our Heat Transfer Twin can help HRSG (heat recovery steam generator) operators save millions of dollars, today I'd like to take a closer look at how a Heat Transfer Twin could be developed. As already explained, conventional inspections of HRSG walls and tubes require considerable manual effort and take up to three weeks. To reduce this expense, it's important to know in advance where corrosion might have occurred. However, identifying corrosion risks is very complicated because corrosion depends on several factors. We need to know if and how much liquid is in the steam, and where it hits the tubes.