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Susceptibility to corrosion of aluminium alloy components in ethanol adsorption chiller

  • Methanol, and more recently ethanol, have been deeply employed as adsorbate phase (refrigerant) in adsorption chiller and heat pump applications (e.g. refrigerator adsorption ice maker). The use of anhydrous alcohols however can cause several problems related to the corrosiveness of such molecules towards light alloys (from titanium to aluminium). The problem was already highlighted in bio-fuel technology where bio-ethanol was considered as a promise alternative to fossil hydrocarbons. Water content was observed as one of the main factors influencing corrosion rate. In the present works several accelerated corrosion tests on 6061 Aluminium alloy have been carried out in autoclave in a temperature range from 110 to 135 degrees C with different ethanol to aluminium mass ratio. Highly exothermic reactions related to aluminium oxidation, coupled to hydrogen evolution, have been recorded. The main drawback of hydrogen evolution is the formation of a stagnant layer over the heat exchangers surface, which can limit the ethanol vapour diffusion, thus reducing adsorption condensation rate. (C) 2016 Elsevier Ltd. All rights reserved.

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Metadaten
Author:Edoardo ProverbioORCiD, Luigi CalabreseORCiD, Angela CapriORCiD, Lucio Maria BonaccorsiORCiD, Belal DawoudORCiDGND, Andrea FrazzicaORCiD
DOI:https://doi.org/10.1016/j.renene.2016.08.042
Parent Title (English):Renewable energy
Publisher:Elsevier
Document Type:Article
Language:English
Year of first Publication:2017
Release Date:2022/04/24
Tag:Aluminium; CRACKING; Corrosion; Ethanol; FUEL BLENDS; PAIR; RECOVERY; REFRIGERATOR; Refrigerating systems; TITANIUM; design
Volume:110
First Page:174
Last Page:179
Institutes:Fakultät Maschinenbau
Begutachtungsstatus:peer-reviewed
research focus:Produktion und Systeme
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG