二氧化碳跨临界循环最优压力关联式误差分析

Error Analysis of Optimal Pressure Correlation in Transcritical Carbon Dioxide Cycles

理论分析并模拟验证了二氧化碳跨临界循环存在最优压力这一结论。通过循环模拟,得到选定工况下对应不同蒸发温度和气冷器出口温度的最优压力值,将其模拟值与现有关联式计算所得最优压力值进行对比,并对其所得误差进行分析,旨在找到准确度较高的最优压力关联式,从而为二氧化碳跨临界循环最优压力控制优化提供参考。

The theoretical analysis and simulation validation showed that for transcritical carbon dioxide cycle there exists an optimal pressure. Through the cycle simulation, the values of the optimal pressure in terms of different evaporation temperature and outlet temperature of gas cooler was obtained for selected conditions, compare the analog value with calculated value of the current correlation and analyze these errors, aimed at finding the higher accuracy of the optimal pressure correlation, so as to provide the reference for the control and optimization of the transcritical carbon dioxide cycle.