Thermal design of a finned tubes economizer
DOI:
https://doi.org/10.5377/nexo.v34i06.13115Keywords:
Water, Thermal design, Economizer, Combustion gases, Finned tubesAbstract
An economizer is a finned tube heat exchanger that makes it possible to recover part of the sensible heat of the combustion products emitted by a boiler, transferring it to the feed water and thus increasing thermal efficiency. In the present work, the design of an economizer of tubes with helical fins was carried out to accomplish the preheating of a feed water that is at a temperature of 25 ºC, by using combustion gases at 240 ºC as heat transfer agent which are emitted by burning Fuel-Oil in a fire tube boiler. The water will heat up to 73.27 °C, and both the global heat transfer coefficient and the heat transfer surface area had values of 19.947 W/m2.K and 95.146 m2, respectively. The economizer designed will have a length of the finned tubes of 65.482 m, a total number of tubes of 131, a number of transverse rows of tubes of 16, a depth of the gas conduit of 0.765 m, an actual number of tubes of 144 and an actual length of the finned tubes equal to 72.
Downloads
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2021 Array
This work is licensed under a Creative Commons Attribution 4.0 International License.
The authors who publish in Nexo Scientific Journal agree to the following terms:
- Authors retain the copyright and grant the journal the right of the first publication under the license Creative Commons Attribution License https://creativecommons.org/licenses/by/3.0/, which allows others to share the work with a recognition of the authorship of the work and the initial publication in Nexo Scientific Journal.
- Authors may separately establish additional agreements for the non-exclusive distribution of the version of the work published in the journal (for example, in an institutional repository or a book), with the recognition of the initial publication in Nexo Scientific Journal.
- Authors are allowed and encouraged to disseminate their works electronically (for example, in institutional repositories or in their own website) before and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published works.
