热力循环中的不可避免损失

Inevitable Exergy Loss in Heat Engine Cycle

为了确定在热力循环中可回收的能源潜力 ,将其损失分为可避免和不可避免的损失 .通过内可逆卡诺循环传热温差引起的不可逆损失力学分析 ,提出了利用有限时间热力学来确定在热力循环中的不可避免损失的方法 ,推导出了确定工质和热源间的不可避免损失的计算公式 .利用推导的公式和平均温度的概念 ,可以对实际循环中由温差传热引起的可避免和不可避免的损失进行分析和计算 ,从而减少可避免的损失 ,以改进循环和提高循环的效率 .

In order to determine the energy saving potential that can be recovered, the exergy loss is divided into avoidable and inevitable exergy loss. A method to determine the inevitable exergy loss is proposed by using finite time thermodynamics to analyze the irreversible loss caused by heat transfer temperature differences in an internal reversible Carnot cycle. The inevitable exergy loss caused by heat transfer temperature differences in actual heat engine can be calculated and analyzed by using the derived equations and the concept of average temperature. In this way, the avoidable exergy loss of the cycle can be reduced and the exergy efficiency can be improved.