Abstract
The paper presents a cogeneration power unit based on a gas turbine engine with an external heat supply to the working fluid-air. Aluminum powder or boron are used as fuel, and air is used as an oxidizing agent. On the basis of the chemical thermodynamics equations, we have calculated the heat of aluminum powder oxidation at 31,005 kJ per 1kg of aluminum and 26,283 kJ per 1kg of boron. The fuel utilization factor by a power plant operating on the aluminum is 0.578 and on the boron is 0.501. Specific consumption of conventional fuel at the operation of the power unit on aluminium in the production of electric energy is 163.6 gOE/(kWh), and on the boron is 185 gOE/ (kWh), and thermal energy – 67.6 and 76.49 kgOE/GJ respectively. Specific production of the electrical energy by external heat consumption when working on aluminum and boron are 136.5 and 136.5 kWh/(GJ), respectively. The paper gives specific fuel costs for a power plant without using the exhaust heat after the gas turbine for heating network water. The data obtained are compared with those power plants working on organic fuels. Material and thermal balances are summarized. In gas turbines, it is preferable to use aluminum as a fuel. Boron shows the worst specific parameters.
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