A Preliminary Laboratory Investigation of a Hydraulic Ram Pump

Proceedings

Immediata, Nicola¹  Viccione, Giacomo²  Cava, Roberto³ 

[1] Author to whom correspondence should be addressed.;Department of Civil Engineering, University of Salerno, 84084 Fisciano, Italy;Presented at the 3rd EWaS International Conference on “Insights on the Water-Energy-Food Nexus”, Lefkada Island, Greece, 27–30 June 2018

关键词: hydraulic ram pump;    hydram;    hydropower;    renewably energy;    unsteady flow motion;    laboratory investigation;   

DOI  :  10.3390/proceedings2110687

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

The nexus of food, energy, and water is one of the most complex issues that face society. By 2050 the Earth’s population is expected to exceed 9 billion and most of the population increase will occur in developing countries. In addition, water scarcity will be particularly pronounced in the Middle East/North Africa and the South Asia regions and is likely to worsen as a result of the climate change. Within this framework, we revised the use of the hydraulic ram as a possible solution to supply water in remote areas. Experimental results of a preliminary investigation carried on a hydraulic ram pump assembled at the Laboratory of Environmental and Maritime Hydraulics of the Department of Civil Engineering, University of Salerno, Italy showed that geometric parameters as well as material properties affect its operating efficiency. The effect of the impulse valve on the pressure temporal trend is assessed by processing video recordings taken with high-speed digital cameras with a sampling rate of 1 KHz. Most of its effect is produced when the percentage of valve opening is in the range 0–20%, where correspondingly the valve coefficient Kv varies of about 80%. Unsteady pressure profiles were detected by means of pressure transducers with an acquisition of up to 1 kHz. The system of acquisition revealed the existence of a family of transient shock waves which intensity depends on the system’s features.

【 授权许可】

CC BY