Experimental investigation of a thermally powered central heating circulator: Pumping characteristics.

Highlights: [•] We test a thermally powered circulator based on two-phase thermofluidic oscillations. [•] Two heat exchanger designs and two power transmission lines are compared. [•] Increased fluid inertia in the load improves the maximum flow-rate and stalling head. [•] The pumping capacity depends on the heat uptake and the liquid oscillation amplitude. [•] The stalling head is correlated to the internal working fluid temperature amplitude. [ABSTRACT FROM AUTHOR]