太阳能驱动的联合卡诺热机循环生态学性能研究

STUDY ON THE ECOLOGICAL OPTIMAL PERFORMANCE FOR A COMBINED CARNOT POWER PLANT BY SOLAR ENERGY

用有限时间热力学的理论分析一个由太阳能驱动的具有热阻、热漏、内不可逆性和补燃的定常流联合卡诺型热机循环;研究其在补燃作用下功率、效率和生态学指标的性能,利用不可逆因子表征循环的内不可逆性,并在傅立叶导热定律下对其进行优化;得到功率、效率和生态学指标之间的优化关系。结果表明:以最大生态学指标为目标对模型进行优化,可比以功率为优化目标时获得更高的效率和更小的熵产率。

The power output, efficiency and ecological criterion of a combined Camot heat engine cycle with heat resistance, heat leakage, internal irreversibility and supplemental combustion were analyzed and optimized by using finite-time thermodynamics. The analytical formulae about power, efficiency and ecological criterion of the irreversible combined Camot heat engine cycle were derived. And the relations between optimal output powers, optimal efficiency and optimal ecological criterion were studied by detailed numerical examples. The results obtained the efficiency under the maximum ecological criterion is quiet close to the minimum entropy generation rate of the cycle; and the correspond efficiency is higher than the result under the maximum power output which is studied by other researchers.