Performance and aerodynamic analysis of the Thai four bladed wooden rotor coupled to a ladder pump | |
| Author | Mukhia, Prawindra |
| Call Number | AIT Thesis no. ET-81-2 |
| Subject(s) | Windmills Rotors--Testing Pumping machinery |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | This thesis was primarily conducted to investigate the performance of the Thai 4-bladed wind rotor coupled to a wooden ladder pump as used extensively for irrigation in the Chachaeng Sao Province. The rotor is locally constructed by individual farmers , while the ladder pump is manufactured in a Mechanical Shop at Chachaeng Sao town. From the rotor tests performed in the wind-tunnel, taking into account the varying profiles and angles of each blade and also the aerodynamic losses, a maximum power coefficient (Cp) of 0 . 328 .at a tip speed ratio (A) of 5.5 has been estimated . In a separate test made for the ladder pump, the pump efficiency was found to be maximum of 41.7 percent at 30 rpm of the pump shaft and 20 percent submergence. For actual working submergence of 100 percent, the maximum efficiency attained was 32.4 percent at 40 rpm of the pump shaft. The maximum overall efficiency of the windmill at 80 and 100 percent submergences gave the same value of 9 .1 percent at a windspeed of 3 .5 m/s and a tip speed ratio of 5.5. Economic evaluation of the system indicates a pay-back period of 1.6 to 2 years depending upon the operational costs. An overview of the availability of wind energy in Thailand has a l so been made. Though Thailand has predominantly a l ow annual average , the diurnal and seasonal wind patterns are more encouraging. Songkhla and Sattahip , both lying in the coastal zone of the Gulf of Thailand have high annual averages of 4 m/s and 3 . 9 m/s respectively. |
| Year | 1981 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Energy Technology (ET) |
| Chairperson(s) | Walter, Despiegelaere, Ir. |
| Examination Committee(s) | Lysen, Ir. Eric H. ; Exell, Robert H.B. ; Singh, Gajendra |
| Scholarship Donor(s) | Federal Republic of Germany. |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1981 |