Your browser does not support JavaScript!

Home    Κατασκευή πιλοτικής μονάδας θερμοεναλλάκτη και αξιολόγηση "πρασίνων" χημικών πρόσθετων στην παρεμπόδιση δυσδιάλυτων ανόργανων αλάτων  

Results - Details

Add to Basket
[Add to Basket]
Identifier 000358588
Title Κατασκευή πιλοτικής μονάδας θερμοεναλλάκτη και αξιολόγηση "πρασίνων" χημικών πρόσθετων στην παρεμπόδιση δυσδιάλυτων ανόργανων αλάτων
Alternative Title Construction of pilot unit heat exchanger and evaluation of "green" chemical additives in inhibition of insoluble inorganic salts
Author Αντωνογιαννάκης, Εμμανουήλ Χαραλάμπους
Thesis advisor Δημάδης, Κωνσταντίνος
Abstract The present thesis focuses on the design and construction of a pilot prototype of a water recirculation unit with heat exchanger and cooling tower as a model of the systems used in industry. This unit is build and used for the study of the inhibitory ability of chemical additives on sparingly salt formation, which constitute a very important problem on industrial cooling systems, especially on their effect on deposition of sparingly salts on heated surfaces. Heat exchanger planning was realized using mass and energy balance. The application of mass balance was realized under permanent (static) conditions, whereas the application of energy balance was realized under non-permanent (dynamic) conditions, as it happens in A real industrial setting. Also, it was calculated the demanded power that the pump must have for an ideal system function using a cooling tower that was functioning in a “cross-flow” fashion for most efficient water cooling. The chemical additives that were used as inhibitors belong to two categories: phosphonic acids (2-phosphonobutane-1,2,4-tricarboxylic acid and bis(hexamethylene triaminepenta (methylenephosphonic acid)) and carboxylic-based polymers (carboxymethyl inulin family). The carboxylic-based polymers are “green” additives since they are environmentally – friendly, non toxic and biodegradable. At the present thesis experiments were carried out in the absence of inhibitors (control) so that we could we can compare the quantity and the quality of their effect on CaCO3 fouling and for each inhibitor separately. All inhibitors tested, showed inhibitory ability in CaCO3 formation. This conclusion is based on macroscopic observation (CaCO3 fouling) and on soluble Calcium measurements. Finally, the role of temperature of the heat exchanger, the heating time and the water flow within the unit were very important factors for CaCO3 fouling on the heated surface, considering the CaCO3 inverse solubility features.
Language Greek
Subject Green inhibitors
Πράσινοι παρεμποδιστές
Issue date 2010-06-01
Collection   School/Department--School of Sciences and Engineering--Department of Chemistry--Post-graduate theses
  Type of Work--Post-graduate theses
Views 174

Digital Documents
No preview available

Download document
View document
Views : 3