%0 Journal Article %1 Johannessen20022649 %A Johannessen, Eivind %A Nummedal, Lars %A Kjelstrup, Signe %D 2002 %J International Journal of Heat and Mass Transfer %K 2002 EGM heat-exchanger %N 13 %P 2649 - 2654 %R 10.1016/S0017-9310(01)00362-3 %T Minimizing the entropy production in heat exchange %U http://dx.doi.org/10.1016/S0017-9310(01)00362-3 %V 45 %X We present a theoretical proof that the entropy production due to heat exchange in a heat exchanger is minimum when the local entropy production is constant in all parts of the system. The solution for the minimum is independent of the value of the heat transfer coefficient. The general case is compared to the minimization problem that has equipartition of forces as solution. It is found that equipartition of forces predicts the minimum from the general solution well for typical heat exchange conditions. The discrepancy between the two solutions depends largely on the temperature dependency of the heat transfer coefficient. The optimal heat exchange conditions are very well approximated in practice with a counter-current heat exchanger; since the minimum in the entropy production space probably is flat.

@article{Johannessen20022649, abstract = {We present a theoretical proof that the entropy production due to heat exchange in a heat exchanger is minimum when the local entropy production is constant in all parts of the system. The solution for the minimum is independent of the value of the heat transfer coefficient. The general case is compared to the minimization problem that has equipartition of forces as solution. It is found that equipartition of forces predicts the minimum from the general solution well for typical heat exchange conditions. The discrepancy between the two solutions depends largely on the temperature dependency of the heat transfer coefficient. The optimal heat exchange conditions are very well approximated in practice with a counter-current heat exchanger; since the minimum in the entropy production space probably is flat.}, added-at = {2011-05-26T21:54:53.000+0200}, author = {Johannessen, Eivind and Nummedal, Lars and Kjelstrup, Signe}, biburl = {https://www.bibsonomy.org/bibtex/2a9f7db0b011590e92c3960af94aabb72/thorade}, description = {ScienceDirect - International Journal of Heat and Mass Transfer : Minimizing the entropy production in heat exchange}, doi = {10.1016/S0017-9310(01)00362-3}, interhash = {d10e881935a68b5848393a0b14cb3628}, intrahash = {a9f7db0b011590e92c3960af94aabb72}, issn = {0017-9310}, journal = {International Journal of Heat and Mass Transfer}, keywords = {2002 EGM heat-exchanger}, number = 13, pages = {2649 - 2654}, timestamp = {2011-05-26T21:54:53.000+0200}, title = {Minimizing the entropy production in heat exchange}, url = {http://dx.doi.org/10.1016/S0017-9310(01)00362-3}, volume = 45, year = 2002 }