Small-scale centrifugal compressor pre-design model for domestic refrigeration

Here are gathered the different polynomial functions that estimate the performance of a small scale centrifugal compressor. Different sets of function have been performed as a function of the specific speed ns, specific diameter ds, pressure ratio PR, blade height ratio zeta=b4/r4 and shroud to tip radius eps=r2s/r4. These polynomial functions are valid for R134a (Folder "valid for R134a"). To be valid with other organic fluids (R245fa, R600a, R152a), the clearance ratio CR must be added as an additional variable (Folder "valid for multiple fluids"). For more information about the methodology of the pre-design model, its boundaries and other features, please refer to the following thesis "POTENTIAL AND CHALLENGES OF ORC DRIVEN HEAT PUMPS BASED ON GAS BEARING SUPPORTED TURBOMACHINERY, V.Mounier, Ecole Polytechnique Fédérale de Lausanne, 2018"

本数据集汇集了用于估算小型离心压缩机性能的各类多项式拟合函数。本研究基于比转速（specific speed, ns）、比直径（specific diameter, ds）、压比（pressure ratio, PR）、叶片高度比（blade height ratio, ζ=b4/r4）以及轮毂-叶尖半径比（shroud to tip radius, ε=r2s/r4）这几个自变量，构建了多组多项式函数。该类多项式函数适用于制冷剂R134a，相关文件存放于"valid for R134a"文件夹中。若需将其适配于其他有机制冷剂（R245fa、R600a、R152a），则需额外引入间隙比（clearance ratio, CR）作为自变量，相关文件存放于"valid for multiple fluids"文件夹中。如需了解该预设计模型的方法论、适用边界及其他特性，请参阅以下学位论文：《基于气体轴承支撑透平机械的有机朗肯循环（Organic Rankine Cycle, ORC）驱动热泵的潜力与挑战》（POTENTIAL AND CHALLENGES OF ORC DRIVEN HEAT PUMPS BASED ON GAS BEARING SUPPORTED TURBOMACHINERY），作者V.Mounier，洛桑联邦理工学院，2018年。