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In this study, a positive displacement (PD) oil pump capable of operating at temperatures about200 °C was constructed using locally available materials. The oil pump was tested to circulate pre-heated refined sunflower oil in Thermal Energy Storage (TES) tank comprising of an oil only androck pebble-oil system and cooking application. The oil pump was constructed of harden steel andmild steel materials driven by AC/DC electric motor rated 8000 rpm. Standard gear teeth cuttingtool was employed to produce the spurs and the pumps’ speed was varied using variable ACtransformer connected to 220V AC main source. The performance of the pump was evaluated formaximum temperature during charging oil tank where the pump circulated hot oil through it and atemperature of about ~ 215 °C was achieved. In addition, when the oil pump was used to charge5.5 litres of refined sunflower oil in TES tank by heat extraction through a boiler, an averagetemperature profile of 190 °C was achieved in 3 hours compared to the 74 °C attained bythermosiphoning in 6 hours of charging in the studies done by Mawire (2009). In addition, theTES cooking application fabricated demonstrated cooking of local foods such as bean and ricewith a comparable cooking time. It was observed that the integration of the TES system with hightemperature pump improved the performance of TES charging efficiency.
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