Determination of Hydraulic Ram Pump Performance: Experimental Results

Wanchai Asvapoositkul,Nattapong Tabtimhin,Jedsada Juruta,Yosawat Limpongsa

doi:10.1155/2019/9702183

Wanchai Asvapoositkul, Nattapong Tabtimhin + Show 2 more

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https://doi.org/10.1155/2019/9702183

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Abstract

The possibility of using a hydraulic ram pump (HRP) as a means of utilizing its energy to produce high head for pump has been investigated. To make such a system economically competitive, it is necessary to improve the performance of HRPs. To achieve this improvement, it is also necessary to understand the parameters that marked out the design of conventional HRPs. The performance is presented in dimensionless terms as the head ratio H∗ or discharge head to drive head and flow-rate ratio Q∗ or discharge flow rate to drive flow rate. The experiments on HRPs were conducted by which each of the following factors could be varied independently: (a) supply head, (b) air chamber pressure, and (c) waste valve beats per minute. An increase in the supply head tends to increase the supply flow rate, delivery flow rate, delivery head, and the overall efficiency of the pump. An increase in air chamber pressure tends to decrease the overall efficiency of the pump. However, there was no significant difference on the HRP performance over a wide range of flow conditions when air chamber pressure was varied. An increase in waste valve beats per minute tends to decrease the supply flow rate, delivery flow rate, and delivery head. But it tends to increase the head ratio, the flow-rate ratio, and the overall efficiency of the pump. The experimental data reveal that the HRP characteristics are functions of the waste valve beats per minute and the supply head.

Highlights

It is necessary to understand the parameters that marked out the design of conventional hydraulic ram pump (HRP). e performance is presented in dimensionless terms as the head ratio H∗ or discharge head to drive head and flow-rate ratio Q∗ or discharge flow rate to drive flow rate. e experiments on HRPs were conducted by which each of the following factors could be varied independently: (a) supply head, (b) air chamber pressure, and (c) waste valve beats per minute
Water is pumped from a particular head at a high flow rate and comes out with a higher head but at a lesser flow rate because of the water hammer effect. e system consists of a drive pipe, waste valve, discharge valve, air chamber, and delivery pipe (Figure 1). e only moving parts of the system are the waste valve and the discharge valve which operate from the fluid dynamic actions of the pumping cycle [1].HRP is one of the simplest and the most environmentally friendly devices for domestic or agricultural use [2, 3]. ere are a lot of people in a lot of countries that build and use this kind of pump
It reveals that an increase in supply head Hs, tends to increase the delivery head Hd, delivery flow rate Qd, and supply flow rate Qs

Summary

Introduction

Academic Editor: Arnaud Perrot e possibility of using a hydraulic ram pump (HRP) as a means of utilizing its energy to produce high head for pump has been investigated. E experiments on HRPs were conducted by which each of the following factors could be varied independently: (a) supply head, (b) air chamber pressure, and (c) waste valve beats per minute. An increase in waste valve beats per minute tends to decrease the supply flow rate, delivery flow rate, and delivery head. It tends to increase the head ratio, the flowrate ratio, and the overall efficiency of the pump. E experimental data reveal that the HRP characteristics are functions of the waste valve beats per minute and the supply head.

Methods

Results

Conclusion