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Table 1 Used variables

From: Net-exergetic, hydraulic and thermal optimization of coaxial heat exchangers using fixed flow conditions instead of fixed flow rates

Variables Values Units Source
\({Re}_{\text{lam}}\) 1000 [-] (Kratz et al. 1931)
\(Pr\) 26 [-] (pro 2016)
\({\lambda }_{\text{steel}}\) 60 [W/(m K)] (VDI 2010-06)
\({\lambda }_{\text{plastic}}\) 0.42 [W/(m K)] (VDI 2010-06)
\({\lambda }_{\text{brine}}\) 0.513 [W/(m K)] (pro 2016)
\({k}_{\text{steel}}\) 2 [mm] (White 2011)
\({k}_{\text{plastic}}\) 0.0015 [mm] (White 2011)
\({\rho }\) 1036 \([\text{kg}/\text{m}^{3}]\) (pro 2016)
\({\nu }\) \(3.35\times 10^{-6}\) [\(\text{m}^{2}/\text{s}\)] (pro 2016)
\({c_p}\) 3880 [J/(kg K)] (pro 20)
\({T_{e}}\) 10 [\({}^\circ \text{C}\)]