%0 Journal Article %1 Lerou2005659 %A Lerou, P.P.P.M. %A Veenstra, T.T. %A Burger, J.F. %A ter Brake, H.J.M. %A Rogalla, H. %D 2005 %J Cryogenics %K 2005 EGM heat-exchanger optimization %N 10--11 %P 659 - 669 %R 10.1016/j.cryogenics.2005.08.002 %T Optimization of counterflow heat exchanger geometry through minimization of entropy generation %U http://dx.doi.org/10.1016/j.cryogenics.2005.08.002 %V 45 %X A counterflow heat exchanger (CFHX) is an essential element for recuperative cooling cycles. The performance of the CFHX strongly influences the overall performance of the cryocooler. In the design of a heat exchanger, different loss mechanisms like pressure drop and parasitic heat flows are often treated separately. Acceptable values for the pressure drop and total heat leakage are estimated and thus a CFHX geometry is more or less arbitrarily chosen. This article applies another, less familiar design strategy where these losses are all treated as a production of entropy. It is thus possible to compare and sum them. In this way, a CFHX configuration can be found that is optimal for a certain application, producing a minimum of entropy and thus has minimum losses. As an example, the design steps of a CFHX for the micro cooling project at the University of Twente are given. Also a generalization of micro CFHX dimensions for cooling powers between 10 and 120 mW is presented.

@article{Lerou2005659, abstract = {A counterflow heat exchanger (CFHX) is an essential element for recuperative cooling cycles. The performance of the CFHX strongly influences the overall performance of the cryocooler. In the design of a heat exchanger, different loss mechanisms like pressure drop and parasitic heat flows are often treated separately. Acceptable values for the pressure drop and total heat leakage are estimated and thus a CFHX geometry is more or less arbitrarily chosen. This article applies another, less familiar design strategy where these losses are all treated as a production of entropy. It is thus possible to compare and sum them. In this way, a CFHX configuration can be found that is optimal for a certain application, producing a minimum of entropy and thus has minimum losses. As an example, the design steps of a CFHX for the micro cooling project at the University of Twente are given. Also a generalization of micro CFHX dimensions for cooling powers between 10 and 120 mW is presented.}, added-at = {2012-02-27T10:56:12.000+0100}, author = {Lerou, P.P.P.M. and Veenstra, T.T. and Burger, J.F. and ter Brake, H.J.M. and Rogalla, H.}, biburl = {https://www.bibsonomy.org/bibtex/2d7de6809abcdb5a299535802fa1eb96e/thorade}, description = {Optimization of counterflow heat exchanger geometry through minimization of entropy generation 10.1016/j.cryogenics.2005.08.002 : Cryogenics | ScienceDirect.com}, doi = {10.1016/j.cryogenics.2005.08.002}, interhash = {72b1a17b1f99f19c98842e8e37e52d07}, intrahash = {d7de6809abcdb5a299535802fa1eb96e}, issn = {0011-2275}, journal = {Cryogenics}, keywords = {2005 EGM heat-exchanger optimization}, number = {10--11}, pages = {659 - 669}, timestamp = {2012-02-27T10:56:12.000+0100}, title = {Optimization of counterflow heat exchanger geometry through minimization of entropy generation}, url = {http://dx.doi.org/10.1016/j.cryogenics.2005.08.002}, volume = 45, year = 2005 }