Performance of a Modified Ram Pump With Double Inlets: An Innovative Technique to Improve Performance of the Hydraulic Ram Pump

Hydraulic ram pump offers electricity-free, low-cost and reliable way to supply water to a higher elevation. The goal of this study was to modify the existing hydraulic ram pump system to improve its overall performance. In the present work, the effects of adding a second drive pipe to a common pressure chamber of the existing ram pump unit were studied. Notably, the other components remained the same throughout all experiments. It was hypothesized that the addition of second drive pipe should increase the amount of water delivered by the pump and overall yield a better result in terms of pump’s volumetric efficiency and energy efficiency. Building on previous findings, all testing conducted during our research was completed using an optimal drive pipe inclination angle of 67.5°, with a pipe length of 4.8 ft, and a delivery pipe height of 10′8″. Using these initial conditions, and a single drive pipe, resulted in a maximum efficiency of 8%. Test runs with an additional drive pipe of the same length and inclination and with modifying the waste and check valve showed a considerable increase in the pump’s efficiency, up to 22%. Remarkably, the delivery flow rate increased by as much as 340%.

Pengaruh “Drive Head” terhadap Efisiensi dan Kemampuan “Delivery Head” Maksimum pada Pompa Hidram

Tujuan dari penelitian ini adalah untuk mempelajari pengaruh ketinggian sumber air (drive head) terhadap efisiensi dan kemampuan maksimum memompa air (delivery head) pada pompa jenis hidram. Pompa hidram yang dibuat terdiri dari ukuran ½, ¾, dan 1 in. Dalam penelitian ini, air dialirkan dari tangki penampung sebagai sumber air melalui “drive pipe”, selanjutnya pompa hidram memompakan air tersebut ke tempat yang lebih tinggi melalui “delivery pipe”. Hasil penelitian menunjukkan bahwa tinggi sumber air umpan (drive head) dan tinggi tangki air penampung (delivery head) berpengaruh terhadap efisiensi pompa. Semakin besar drive head (h) dan delivery head (H), untuk semua ukuran pompa, efisiensi pompa semakin menurun. Efisiensi tertinggi pompa yaitu pada pompa hidram ukuran 1 in dimana drive head (h) pompa tersebut setinggi 0,55 m dan delivery head (H) setinggi 3 m dengan efisiensi sebesar 56,73 %. Tinggi sumber air umpan (drive head) berpengaruh terhadap delivery head maksimum (Hmax), semakin besar drive head (h) semakin besar delivery head maksimumnya (Hmax).

Development of A Pressure Sensing Module and Flow Control System For A Prototype Pump Test Bed

Pump test bed is essential to ensure the proper functioning of a pump. However, a conventional pump test bed has some limitations during measuring the flow properties and variating the pump speed. As a result, a digital pump test bed can be a solution for measuring the flow properties more accurately. This article describes the construction process of a pressure sensing module for a digitalized pump test bed and control of flow by varying the speed of a prototype DC pump. A pressure sensing module and flow control system are constructed in this study to develop a prototype pump test bed as well as change the speed of the centrifugal pump. It is found that by using a piezoelectric pressure sensor in delivery pipe, the pressure sensing error is only 6.3% at the designed speed of pump and can be minimized by calibrating the sensor, fixing the leakage problem and increasing the pressure of flow. A wide variety of pump speeds can also be obtained by applying pulse width modulation principle without stopping the power supply.

Investigation of Flow Characteristic on Ram Pump in Different of Pipe Junction Geometry

Ram Pump is a mechanical device that uses phenomenon of difference pressure to distribute the water toward high state level. The advantages of ram pump are low cost, construction of reliable and without electrical energy. Kinetic and potential energy are main factor to flow the water in driver pipe. This research purposed to determine flow characteristic in different geometries of ram pump based on experiment data. Ram pump operated on different pressure of inlet area which was get from water level. To get the flow characteristic of rum pump, it was simulated using computational fluid dynamic. The result of simulation was found that junction type of U shape appeared wake in driver pipe area; thus, this phenomenon indicated any turbulent flow because decreasing of pressure. In other junction pipe, wake phenomenon appeared in driver and delivery pipe area.

Numerical Investigation of the Three-Dimensional Pressure Distribution in Taylor Couette Flow

An investigation is conducted on the flow in a moderately wide gap between an inner rotating shaft and an outer coaxial fixed tube, with stationary end-walls, by three-dimensional Reynolds-averaged Navier–Stokes (RANS) computational fluid dynamics (CFD), using the realizable k−ε model. This approach provides three-dimensional spatial distributions of static and dynamic pressures that are not directly measurable in experiment by conventional nonintrusive optics-based techniques. The nonuniform pressure main features on the axial and meridional planes appear to be driven by the radial momentum equilibrium of the flow, which is characterized by axisymmetric Taylor vortices over the Taylor number range 2.35×106≤Ta≤6.47×106. Regularly spaced static and dynamic pressure maxima on the stationary cylinder wall follow the axial stacking of the Taylor vortices and line up with the vortex-induced radial outflow documented in previous work. This new detailed understanding has potential for application to the design of a vertical turbine pump head. Aligning the location where the gauge static pressure (GSP) maximum occurs with the central axis of the delivery pipe could improve the head delivery, the pump mechanical efficiency, the system operation, and control costs.

PERANCANGAN DAN ANALISIS PERFORMA POMPA HIDRAM UNTUK MEMENUHI KEBUTUHAN AIR BERSIH DI DUSUN BELANG TLOGOLELE SELO BOYOLALI

<p>This research aimed to: (1) determine the daily water needs of Belang population, (2) designing<br />hydram pump installation based on water needs and geographical conditions of Belang village, (3) study the<br />performance and efficiency of the hydram pump, (4) study the role of the hydram pump to fulfill the daily<br />water needs of Belang population. This study was based on Research and Development (R &amp; D). It<br />developed hydram pump installation to fit the topography of Belang village so it can work optimally. The<br />pump was tested by varying waste valve length at 20 mm, 25 mm, 30 mm and 35 mm; and waste valve ballast<br />at 0 grams, 250 grams, 500 grams and 750 grams. Data collection was performed three times for each<br />variation. Hidram pump performance was determined by the efficiency and the volumetric discharge of water<br />produced during the pump operation. Hydram pump was designed based on standard of the daily water<br />needs which reachs 13650 liters/ day for 195 Belang’s people. In this study, hydram pump has some<br />parameters. They are 4,5 meters of supply height, 80 meters of delivery height, 4 inches of pump body<br />diameter and 1 inch of delivery pipe. Based on the tests that have been conducted, the highest efficiency of<br />the hydram pump shown at 30 mm of waste valve length and 250 grams of waste valve ballast (η = 0.486652,<br />q = 6.746969 L / min). The maximum volumetric discharge was presented at 35 mm of waste valve length<br />and 750 grams of waste valve ballast (q =7.522211 L / min, η = 0.380989). Hydram pump performance<br />could fulfill the water needeed in Belang Village until medium term maintenance level. They could use the<br />water for drinking, cooking, bathing, washing, until cleaning home by 9750 liters/ day.</p>

Approximated mathematical model of hydraulic drive of container upturning during loading of solid domestic wastes into a dustcart

A simplified mathematical model of hydraulic drive of container upturning during loading of solid domestic wastes into a dustcart is proposed. Approximated analytical time dependencies of pressure in a delivery pipe of a hydrocylinder, angular velocity and the angle of container upturning are obtained. Approximated duration dependence of container upturning from main parameters of hydraulic drive is detected. Optimal values of main parameters of working organs, which ensure minimum time of container upturning during loading of solid domestic wastes into a dustcart are defined.

Investigations of hydraulic operating conditions of air lift pump with three types of air-water mixers

Investigations of hydraulic operating conditions of air lift pump with three types of air-water mixers. The paper presents the analysis of results of the investigations concerning the influence of various constructive solutions of the air-water mixers on hydraulic operating conditions of the air lift pump. The scope of the investigations encompassed the determination of characteristics of delivery head and delivery rate for three types of air-water mixers applied in the constructed air lift pump. Using the obtained results, the efficiency of the three types of air-water mixers applied in this air lift pump was determined. The analysis was carried out and there was checked whether the improved analytical Stenning-Martin model can be used to design air lift pumps with the air-water mixers of these types. The highest capacity in the water transport was reached by the air lift pump with the 1st type air-water mixer, the lowest one – with the 3rd type air-water mixer. The water flow in the air lift pump increases along with the rise in the air flow. The lower are the hydraulic losses generated during flow of the air flux by the air-water mixer, the higher is the air lift pump capacity. Along with the rise in the water delivery head, the capacity of the air lift pump decreases. The highest efficiency is reached by the air lift pump with the 1st type air-water mixer, the lowest – with the 3st type air-water mixer. The efficiency of the air lift pump for the three investigated types of air-water mixers decreases along with the rise in air flow rate and water delivery head. The values of submergence ratio (h/L) of the delivery pipe, calculated with the use of the improved analytical Stenning-Martin model, coincide quite well with the values of h/L determined from the measurements.

Heating Coil and Delivery Pipe Design of Asphalt Heating Equipment

Medium pressure water asphalt heating equipment and hot oil asphalt heating equipment widely used in asphalt concrete mixture are using indirect heating method. In indirect asphalt heating device design, heating coil full of heating medium in asphalt tank and asphalt delivery pipe to next technological tank or asphalt concrete mixing device are key parts for the heating technology. Based on heat-transfer mechanism of heating medium, medium pressure water and hot oil have been compared, and medium pressure water has been chosen as heating medium for better character in heat transmission capability and efficiency. By thermo technical calculation, diameter,length and layout of heating coil have been decided, and structure of asphalt delivery pipe has been designed. Equipment running effect shows pipeline of medium pressure water system is designed reasonably and goal temperature of asphalt can be reached.