Analysis of hydrogen and oxygen hybrid cycle

Abstract

Based on the analysis of the typical combined cycles the hydrogen and oxygen hybrid cycle was carried out. From the result of the calculation some conclusions can be drawn that the efficiency of the Hydrogen and Oxygen cycle increases with the increases of the temperature and the maximum pressure of the cycle. The efficiency reached 62% when the temperature is at 1700°C and the pressure is at 30MPa. There is a good ratio in the middle pressure gas turbine and a fine ratio distribution between the middle pressure gas turbine and high pressure gas turbine. When the temperature is 1500°C, the maximum pressure is at 30MPa and the ratio is 8.0 the efficiency can achieve 60.5%, at the same time the fine ratio distribution is at the point of 1.43. The fine ratio distribution decreases with the total ratio of the gas turbine in the sub-critical area while it decreases at first and increases latterly in the supercritical domain there is a transition point at total ratio value of 30. The hydrogen and oxygen hybrid cycle system can obtain a higher efficiency by using optimization method on the recuperation and reheat systems.