Heat-transfer performance of twisted tubes for highly viscous food waste slurry from biogas plants

Abstract

Highlights Rheological properties of food waste slurry were tested and modeled Pilot test of twisted tube heat exchanger validated the CFD-based simulations Twisted hexagonal tubes exhibited better performance at low-temperature differences Heat-transfer enhancement was due to strong and continuous shear effect close to tube walls Twisted hexagonal tubes exhibited better performance at low-temperature differences Heat-transfer enhancement was due to strong and continuous shear effect close to tube walls

Keywords

• Food waste slurry
• Rheological properties
• Twisted tubes
• Computational fluid dynamics
• Heat-transfer enhancement