The pump then needs to be incorporated in the rear end of the bike with its armature used as a roller which is friction driven by the tyre at the rear end. These groups are gravity, lift and displacement. Many Guatemalan farmers work on steep inclines and wanted to distribute the water once it had been extracted from the well. Background information A pump is basically a device which uses mechanical action to move fluids and in some instances slurries. Specifications of the required head, intended flow rate and the depth of the water source are needed in order to accurately specify the suitable pump. To move the fluid the pumps take up energy in one form or the other including electricity, wind power and manual labour. But even a thermal solar kit rigged to a home under floor water heating system with the electricity off could be toasty warm for a whole winter with a minimum of effort. Apart from being used for drinking, it is also used as a source of energy and as a mode of transport. Putting Research into Practice:
Fabrication, testing and optimization After fabrication of the pump as shown in Figure 4, the next phase is testing and making modifications to optimise the performance. The number of mid-way tanks can be increased indefinitely, effectively making the pumping distance unlimited. As mentioned earlier, the supporting frame is designed such that it can be flipped up to act as a rack when the bicycle is in the transportation mode. Putting Research into Practice: The pump then needs to be incorporated in the rear end of the bike with its armature used as a roller which is friction driven by the tyre at the rear end. The supporting frame A triangular shaped supporting frame can be designed using a CAD software as shown in Figure 2. The manual was recently sent to Malawi by students from the University of Strathclyde involved in a rural irrigation project aiming to address some of the agricultural problems that the developing nation is facing. Just like pedaling a bike. Fabricated pedal powered water pump  Precautions It is important to ensure that there are no leakages in the system as these greatly lower the water pressure or increase the friction in the pipe. Working at Maya Pedal was like being on Scrapheap Challenge — there is a storeroom full of stripped down bicycle parts, a workshop full of tools and the only limit is your own imagination. It is a result where everybody wins; Leary, the University and most importantly, the people of Guatemala. At ground level, it was possible to achieve a water flow of around 30 litres per minute which compare favourably to the one of the original centrifugal pump. How to build a pedal powered water pump The first thing is to acquire a normal bike which then needs to be modified so as to double up as a pedal powered water pump. This means that it does not result in environmental pollution as is the case with fossil fuel powered pumps and generators. It can then be fabricated using steel and incorporated to the bicycle axle. During the downwards movement, positive pressure is created closing the check valve and opening a rubber flap allowing the water to flow out. On pedaling, an alternate up and down movement of the plunger occurs with the upward movement causing a negative pressure or rather a vacuum to occur. The bike-mounting frame can be built quickly and easily using only basic workshop tools and materials, including a few lengths of angle iron, some flat lengths of metal, bicycle seat posts and seat tubes, and a scrapped standard electric centrifugal water pump. But even a thermal solar kit rigged to a home under floor water heating system with the electricity off could be toasty warm for a whole winter with a minimum of effort. We can join with Dr. Pumps fall into three main groups based on the method used to move the fluid. This consequently results in poor results. Centrifugal pump This should be sized based on the exact purpose of the pedal powered pump. This causes a check valve at the bottom to open, drawing water inside the chamber. The machine was tested to a range of heights, with no head or lift making 40 liter per minute flow rate and the reported 26 meters lift making 5 liters per minute.
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