A reciprocating triplex pump has been integrated into a closed-loop supercritical carbon dioxide test facility. The pump is designed to compress liquid or supercritical carbon dioxide and has a maximum volumetric flow rate of 51 L/min. A sweep across the pump’s speed range of 100–1000 rev/min was performed with inlet conditions between 60 and 160 bar. The volumetric efficiency was found to increase as pump speed increased from 10 to 40 % before it plateaued at higher pump speeds. The mechanical efficiency increased linearly with pump speed and was not affected by system pressure. Pressure pulsations caused by the plungers and valves were also measured at each speed. A 35-liter buffer volume, connected near the pump’s discharge was isolated at each speed to determine its effectiveness as a pulsation dampener. Overall the reciprocating pump was shown to perform exceptionally with liquid or supercritical inlet conditions applicable to many supercritical fluid applications.

往复式三缸泵已集成到闭环超临界二氧化碳测试设备中。该泵设计用于压缩液态或超临界二氧化碳，最大体积流量为51 L / min。在入口条件为60至160 bar的情况下，对泵的速度范围为100–1000转/分钟进行了扫描。发现体积效率随着泵速从10％增加到40％而增加，然后在更高的泵速达到平稳状态。机械效率随泵速线性增加，不受系统压力的影响。还测量了每个速度下由柱塞和阀引起的压力脉动。在每个速度下都隔离了一个35升的缓冲液，该缓冲液连接在泵的排气口附近，以确定其作为脉动阻尼器的有效性。