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文章研究了内不可逆性一定的情况下，吸、放热时间与温度对两源不可逆热机与不可逆致冷机有限时间经济性能的影响，结果表明：与内可逆循环有相同吸、放热时间和有相同吸、放热温度的这两种不可逆热机和不可逆致冷机分别相比，前者有较大的利润率。
In this paper, we study the effect of suction and exothermic time and temperature on the finite-time economic performance of irreversible and irreversible two-source machines under the condition of certain irreversibilities. The results show that: with the same internal suction and exothermic time and There are two irreversible heat engines with the same suction and exothermic temperatures, respectively, and the irreversible refrigerator, respectively, compared with the former, which has a larger profit margin.