为了提高双抽汽供热汽轮机的热效率，改用循环水供热。
To enhance the heat efficiency of dual extraction heating turbine, circulating water heating is adopted.
解该矩阵方程可得到符合平衡关系的各级回热加热器抽汽系数，并在此基础上求得各级加热器的效率，从而简化了运用分析方法求解抽汽系数的过程。
Then the steam extraction coefficients can be got by solving the equation, furthermore the exergy efficiency of the heaters. So the calculation procedure can be simplified.
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