This paper describes the performance of a circular glass tube solar collector with a set of closed-loop oscillating heat-pipes with check valves (CLOHP/CV). The assembly was divided into three sections, i.e. circular glass tube, adiabatic gap and condenser water tank. A circular 10-set glass...

Experimental studies were performed to investigate the thermal performance of three closed-loop oscillating heat pipes (CLOHPs) operating at the vertical bottom heat mode with heating power input in a range of 15–127W. The tested CLOHPs are all made from copper capillary tubes with inner...