Abstract
Abstract The logarithmic mean temperature difference (ΔT LM or LMTD) is a corner stone concept used in the design and analysis of heat transfer equipment, such as heat exchangers. The LMTD methods are well established in the Chemical Engineering framework and, in general, apply a counterflow LMTD corrected by some factor to assess the “true” mean temperature difference between the fluids exchanging heat. The counterflow LMTD is used because it is undoubtedly believed that its value for two countercurrent streams is higher than when the same streams are arranged in concurrent flow. Although this principle may be supported by direct comparison between the counterflow and parallel flow LMTD’s for any given process conditions, a demonstration of its universal validity is not found in the literature. This article presents a proof founded in mathematical and physical arguments that this belief is indeed a fact.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
