Thermal Analysis of Cable Sealing Ends
A general analytical method for thermal analysis of high-voltate oil-filled cable sealing ends is presented. Oil flow within the conductor oil duct, longitudinal heat flow through the conductor and conductor losses variation with temperature are taken into consideration. The method is successfully applied for a sealing end of a 300 kV, 2000 mm2 integral sheath cooled oil-filled cable. A companion paper where cable joints are analyzed, is referenced.
Electro-thermal analysis of naturally cooled extra high voltage cable sealing end that provided with heat pipe as cooling method
In this paper, an analytical method for the thermal analysis of naturally cooled high voltage cable sealing end provided with heat pipe as method of cooling is introduced. In this analytical method, the axial heat flow as well as the heat convection and radiation are taken into account. To validate the analytical method, a comparison between the experimental results that done by others, the finite element method results and the results obtained by this analytical method is done. It is noticed that there is a good agreement between the results of the three methods. Finally, the analytical method is used to investigate the effect of ambient temperature and the thermal resistivity of the insulation on the temperature distribution along the sealing end and the adjacent cable parts.
Techno-economic analysis of chemical looping combustion with humid air turbine power cycle
Abstract Power generation from fossil fuel-fired power plant is the largest single source of CO2 emission. CO2 emission contributes to climate change. On the other hand, renewable energy is hindered by complex constraints in dealing with large scale application and high price. Power generation from fossil fuels with CO2 capture is therefore necessary to meet the increasing energy demand, and reduce the emission of CO2. This paper presents a process simulation and economic analysis of the chemical looping combustion (CLC) integrated with humid air turbine (HAT) cycle for natural gas-fired power plant with CO2 capture. The study shows that the CLC–HAT including CO2 capture has a thermal efficiency of 57% at oxidizing temperature of 1200 °C and reducer inlet temperature of 530 °C. The economic evaluation shows that the 50 MWth plant with a projected lifetime of 30 years will have a payback period of 7 years and 6 years for conventional HAT and CLC–HAT cycles respectively. The analysis indicates that CLC–HAT process has a high potential to be commercialised.