Energy effectiveness of simultaneous heat and mass exchange devices
Name
Narayan-2010-ENERGY EFFECTIVENESS OF SIMULTANEOUS HEAT AND.pdf
Size
1.71 MB
Format
Adobe PDF
Checksum (MD5)
a161a9b5ab0b2414d8712fef58114bad
Author(s)
Narayan, G. Prakash
Mistry, Karan Hemant
Sharqawy, Mostafa H.
Zubair, Syed M.
Lienhard, John H.
Date Issued
2010
Journal
Frontiers in Heat and Mass Transfer
Publisher
Global Digital Central
Citation
Narayan, G. P. et al. "Energy effectiveness of simultaneous heat and mass exchange devices." Frontiers in Heat and Mass Transfer (FHMT), 1, 023001 (2010)Copyright © 2010 by Global Digital Central
Version
Final published version
Abstract
Simultaneous heat and mass exchange devices such as cooling towers, humidifiers and dehumidifiers are widely used in the power generation, desalination, air conditioning, and refrigeration industries. For design and rating of these components it is useful to define their performance by an effectiveness. In this paper, several different effectiveness definitions that have been used in literature are critically reviewed and an energy based effectiveness which can be applied to all types of heat and mass exchangers is defined. The validity and the limitations of the various effectiveness definitions are demonstrated by way of several examples including direct and indirect contact, parallel and counterflow heat and mass exchangers. The limiting case of a simple heat exchanger is also discussed. The importance of thermal balancing in minimizing entropy production and its implications for optimization and design of these devices is dealt with in detail. The application of the energy effectiveness to heat-exchanger-like "-NTU correlations is also examined using a detailed numerical model.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.5098/hmt.v1.2.3001
