تقييم أداء الوحدات التوليدية المركبة باستخدام تقتية حقن البخار

الملخص EN

The present work has been carried out on a gas turbine unit of a power output of 123MW operates on a simple cycle mode.

The study involves two main parts.

The first part has been focused on the effect of the ambient temperature rise on the performance of simpleg as turbine unit, while the second part was concentrated to evaluate the extra power output that can obtained ,”with and without steam injection technique”, was applied to the combustion chamber of the simple gas turbine unit.

Regarding the simple gas turbine, results show that the compressor mass flow rate of air power output, and thermal efficiency decreases, nearly by (9.43%), (22.627%) and (5.7%) respectively, as the ambient temperature increases from 15℃ to45 ℃ .

While, the specific fuel consumption increases by nearly (8%), as the ambient temperature rises from 15℃- 45℃.

However, when the combined cycle mode is applied ,results show that the generated power output for the combined unit, has been increased nearly by (59.195%) over that one generated from simple cycle unit.

Results also showed that when steam injection is used, in the combined power units, the power generated was increased by (13.931%)over that one which is generated when steam injection was not used at the same operating condition.

Key words:-Gas turbine, combined power plant, steam injection technique.