Design and development of a diaphragm pump for thermodynamic solar water pumping | |
| Author | Sharma, Mahendra Pal |
| Call Number | AIT Thesis no.AE-79-11 |
| Subject(s) | Solar energy research Pumping machinery--Design and construction |
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Two test models of a, diaphragm pump using an automatic valve mechanism consisting of a set of permanent magnets and springs were developed for low lift solar water pumping. The system using the first model was based on Rankine-cycle and used freon-113 as working fluid. This system used a recharging pump which did not work properly, and the head obtained was low. The system using the modified model was based on an intermittent Rankine-cycle thus eliminating the recharging pump. This also used freon113 as working fluid. Before operating with solar energy, the diaphragm pump was tested with compressed air and its maximum efficiency varied from 20 percent to 26 percent. Freon-ll3 was evaporated in a simple flat plate solar collector. The vapour generated was used to operate the diaphragm pump. Exhaust vapour was condensed and collected in a container which was charged into the flat plate solar collector by gravity for use during the next day's operation. For the satisfactory performance of the system it was found that the temperature of the pump body should be above 50ํ C for this a glass box equipped with four adjustable reflecting mirrors was used. With this arrangement the pump could be started after 2 hours of bright sun shine. At a constant input vapour pressure the discharge of the pump decreased as the head increased. The discharge of the pump was 4.3 litres min-1 at a 3 meter head while it reduced to 2.8 litres min-1 at a head of 6 meters at a freon vapour pressure of 2.4 kg cm-2 inside the collector. The head increased as the _input vapour pressure increased. When the pump was operated at a freon vapour pressure of 2.4 kg cm-2, its maximum efficiency was 0.36 percent. |
| Year | 1979 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Singh, Gajendra ; Exell, Robert H.B. |
| Examination Committee(s) | Jindal, Vinod Kumar |
| Scholarship Donor(s) | Norwegian Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1979 |