Modelling of a two-phase thermofluidic oscillator for low-grade heat utilisation: Accounting for irreversible thermal losses

► Two models for a novel two-phase thermofluidic oscillator are developed. ► The effect of including a dissipative thermal loss (TL) parameter is investigated. ► The models predict the oscillation frequency of a prototype (0.1-0.2 Hz) well. ► Excluding the TL parameter leads to a 30-fold overestimation of the measured efficiency. ► Including the TL parameter allows for a much improved prediction of the efficiency.