Search Add a publication

ID No : 806   Edit
Title: A Mass Computation Model for Lightweight Brayton Cycle Regenerator Heat Exchangers
Summary / Review : "Based on a theoretical analysis of convective heat transfer across large internal surface areas, this paper discusses the design implications for generating lightweight gas-gas heat exchanger designs by packaging such areas into compact three-dimensional shapes. Allowances are made for hot and cold inlet and outlet headers for assembly of completed regenerator (or recuperator) heat exchanger units into closed cycle gas turbine flow ducting. Surface area and resulting volume and mass requirements are computed for a range of heat exchanger effectiveness values and internal heat transfer coefficients. Benefit cost curves show the effect of increasing heat exchanger effectiveness on Brayton cycle thermodynamic efficiency on the plus side, while also illustrating the cost in heat exchanger required surface area, volume, and mass requirements as effectiveness is increased. The equations derived for counterflow and crossflow configurations show that as effectiveness values approach unity, or 100 percent, the required surface area, and hence heat exchanger volume and mass tend toward infinity, since the implication is that heat is transferred at a zero temperature difference. To verify the dimensional accuracy of the regenerator mass computational procedure, calculation of a regenerator specific mass, that is, heat exchanger weight per unit working fluid mass flow, is performed in both English and SI units. Identical numerical values for the specific mass parameter, whether expressed in lb/(lb/sec) or kg/(kg/sec), show the dimensional consistency of overall results." (Author's abstract)
Author(s) : Juhasz, Albert J., [Glenn Research Center]
Publication Date: 2010
Category(s) : Bases, industry and manufacturing / Power / Electric / Nuclear fission
Web URL :
If this link is broken, please Add Comment below.
We try to keep author contact details, and a backup copy in our offline library.
PERMANENT code(s) : L,U
(Explanation of the
last 3 rows above)
In the row above, there are up to 4 possibilities:
U = URL you can click on to get a copy instantly from another source on the internet, or request it from that source
D = Downloadable from PERMANENT (such as because no other URL known...)
L = LAN copy, PERMANENT has a digital copy but not downloadable from our website
P = Paper copy in the PERMANENT office
Typically, only 0 to 3 methods are available.
NTRS : 20100026667
Other Ref # : E-17357
Submitted by : MEP
Comments: Please add your thoughtful Comments to this paper after reading it.
All comments are reviewed and approved before being posted publicly below.
If you wish to submit a private comment to the curator, instead of a public comment, just write "Private" at the start of your comment.
Corrections and suggested additions to our records are appreciated.
  Add Comment 
Add Comment     Green is public,     Pink is private.
Screen Name: Either real name or anonymous alias are OK.
Real Name and
optional info:

Please provide at least your real name, and optionally additional information.
Email Address: We keep your email address private.
Date - Time Sorry, just click on the field, then on the popup calendar click "Now" then "Done".
Your Comment: (if private to curator, then just start with "Private:" or something like that.)