Optimization of counterflow heat exchanger geometry through minimization of entropy generation

Share/Save/Bookmark

Lerou, P.P.P.M. and Veenstra, T.T. and Burger, J.F. and Brake ter, H.J.M. and Rogalla, H. (2005) Optimization of counterflow heat exchanger geometry through minimization of entropy generation. Cryogenics, 45 (10-11). pp. 659-669. ISSN 0011-2275

[img]PDF
Restricted to UT campus only
: Request a copy
362Kb
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.
Item Type:Article
Copyright:© 2005 Elsevier
Faculty:
Science and Technology (TNW)
Research Group:
Link to this item:http://purl.utwente.nl/publications/76636
Official URL:http://dx.doi.org/10.1016/j.cryogenics.2005.08.002
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 227184