The performance of a steam turbine evaluated by an energy/exergy analysis
| MSI99P2052 | |
| Lau Ah Wing, A. F. | |
| University of Mauritius, Faculty of Engineering, Réduit, MU | |
| The performance of a steam turbine evaluated by an energy/exergy analysis | |
| Project, B.Tech (Hons), Sugar Engineering | |
| Thesis | |
| 1995 | |
| 75 p., 7 tbls, 40 figs, 6 pls, 4 appen | |
| En | |
| En | |
| The thermodynamic performances of 3 single-stage back pressure steam turbines of different power ratings and acting as prime-movers for cane preparation mechanism were monitored in two different sugar cane factories. Experiments covered a period of 5 days at MTMD (2), and 16 days at Savannah (1), excluding the installation period. The experimental setup consisted mainly of a computer, a data logger, pressure transmitters, differntial pressure transmitters and platinum resistance thermometers. On every turbine, the properties of steam at inlet and exit and its flow rate were monitored. Results were simultaneously displayed on a computer screen and saved by the hard-disk. Other records were the nozzle pressure, the shaft speed and atmospheric temperature. Data retrieved from the hard-disk was studied through an energy analysis enhanced by an exergy analysis and calculations were made on a spreadsheet, by a program called "Power.xls". Another program "Orifice.xls", was used to calculate and evaluate the performances of the orifice-plates, installed for steam measurement. Comparing the 3 turbines, the results show that the mean shaft power is 153.5 kW, 256.6kW and 608.8kW, representing, 68, 38 and 61 per cent of rated power respectively. In the same order, when compated with rated power, the mean exergy destruction is 65, 37, and 52 per cent while, the mean specific steam consumption is 16.27 kg/kWh and 15.30 kg/kWh. Nevertheless, there are some similarities. The actual performance compared to an ideal performance, known as the thermodynamic efficiency is around 45 percent. Exergetic efficiency defined as the actual work compared with maximum flow exergy is around 53 per cent. The turbines convert about 22 per cent of the available work potential of the live steam into work. Exergy destruction compated with maximum flow exergy is about 47 per cent. | |
| STEAM ENGINES STEAM ENERGY TURBINES EQUIPMENT ENGINEERING CANE SUGAR | |
| MAURITIUS | |
| Cane Sugar Manufacture | |
| 1995-12-12 | |
| En | |
| CAT | |
| ST |