Thermal Engineering → Thermal Engineering (keeping the name structure)
The user mentioned that names should remain unchanged, so "RK Rajput" and book titles should stay the same. Let me look for lists or items that can be varied.
to → to
Also, the last part about "energy efficiency, cost savings, and environmental sustainability" – these are key phrases. Maybe "energy efficiency" can be energy conservation, fuel economy, or energy saving. "Cost savings" might be financial benefits, budget savings, or reduced expenses. "Environmental sustainability" could be ecological preservation, green practices, or sustainable resource use.