Fredrik Bajers Vej 5
Postboks 159 9100 Aalborg
Telefon: 9940 9940
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Title: Control and prevention of ice formation on the surface of an aluminum alloy
20.02.2017 kl. 13.00 - 17.00
In cold climates, mechanical ventilation systems with heat recovery, e.g. air-to-air exchangers, are often used to reduce energy demand for heating. This, however, creates a risk of ice accretion on the fins of the heat exchanger as warm and humid exhausted air cools down which may lead to the deterioration of equipment performance.There are two approaches to controlling ice formation on heat exchangers: active and passive methods. The passive methods, which are related to the surface characteristics of the heat exchanger fins and their effect on the initial phases of ice formation, are the main focus of this PhD study. Since aluminum alloys are commonly used to build air-to-air heat exchangers, their surface characteristics play a crucial role in ice nucleation, formation and accretion. This study is specifically focused on aluminum alloy 8011.
In this PhD study, several types of surface modifications of aluminum alloy were developed that allowed us to obtain stable hydrophilic and hydrophobic surfaces. The effects of these modifications on surface morphology and wettability—the main parameters determining ice nucleation, formation, accretion and freezing delay—were studied comprehensively.
On the basis of the findings and observations of this study, it is found out that tailoring the surface characteristics through the application of different chemical or mechanical methods is an effective method for changing the icing properties of a surface. Future studies might focus on studying the effect of different surface coatings with ion concentration on ice formation kinetics.
Maral Rahimi holds a master in Mechanical Engineering from Linköping University, Sweden, 2010 and Bachelor of Material Engineering from Iran University of Science and Technology, 2007.
She has experimental and practical experiences in different laboratories with focus on new product development by research on different surface modification techniques, coating techniques, surface chemistry, material characteristics, modifications, testing techniques, standards and their appropriate implementation. During her PhD she worked in different labs and clean rooms (in Department of Physics and Nanotechnology Aalborg University, in the labs of Faculty of Engineering and Science, Danish Building Research Institute, Aalborg University, and in Chemistry Department of Denmark technical University (DTU Kemi).
Maral now works as a Test Specialist in Strategic Protective R&D department of Hempel A/S.
Maral Rahimi defends her PhD 20 February 2017 at Aalborg University Copenhagen, Gæstekantinen.
All interested are invited to attend the PhD defence. After wards, SBi will host the reception.
Statens Byggeforskningsinsitut (SBi)
Gæstekantinen, A.C. Meyers Vænge 15, 2450 København SV
27.09.2017 kl. 09.00 - 16.30
In honor of Professor Jane Parpart’s many years of contributions to our department, FREIA and CHI are hosting a special workshop titled Gender, Insecurities and Silences during Conflict and Peacebuilding 27th of September, 2017. We have invited a select group of junior and senior scholars across disciplinary boundaries to explore this issue further. We would like to open up this occasion also for other members of the department and university. Please sign up if you are interested in listening to the presentations (session A), take part in the discussions (session B), or both.
27.09.2017 kl. 13.00 - 16.00
Institut for læring og filosofi, Aalborg Universitet og Aalborg Universitetshospital har den glæde at invitere til ph.d.-forsvar ved sygeplejerske MLP Susanne Winther, Forskningsenhed for Klinisk Sygepleje, som forsvarer ph.d.-afhandlingen: FÆLLES FØLGESKAB -ET AKTIONSFORSKNINGSPROJEKT OM PATIENTOVERGANGE FRA INTENSIV TIL STAMAFSNIT
27.09.2017 kl. 16.00 - 18.00
September 27th from 16.00 - 18.00, we invite you to a nation-wide early premiere of Phie Ambo’s new exciting documentary “...when you look away”. The screening will be followed by a debate live-streamed directly from Skylab at DTU, which you can participate in by sending questions via SMS, twitter and facebook.
28.09.2017 kl. 09.00 - 12.00
Open workshop with Dr. Benjamin Schögler, Co-founder and Creative Director at Skoogmusic. Ben is passionate about making music accessible for everyone and was part of the NESTA team that invented SKOOG - an instrument that anyone can play.
28.09.2017 kl. 10.00 - 13.00
Anja Sloth Ziegler, Department of Chemistry and Bioscience will defend her thesis on: "The microbial community in fouling membrane bioreactors: Distribution and diversity of important bacteria"
28.09.2017 kl. 15.00 - 16.30
Præsentation ved henholdsvis professor og lektor ved Institut for Sociologi og Socialt Arbejde på AAU, Annick Prieur og Sune Qvotrup Jensen.
29.09.2017 kl. 09.00 - 17.00
Seminar on animation and visual research dissemination. Learning from state-of-the-art case-studies and ongoing research projects, we will discuss how 2D and 3D-visualisation and animation, narrative structures, and levels of temporal information can be combined in functional animation e.g. for educational or didactic purposes, or in the presentation or development of scientific material.
29.09.2017 kl. 09.00 - 17.30
This workshop brings together scholars from philosophy and history of science to help shed light on epistemological and historical cases of ‘evidence-based’ (or ‘informed’) policy and policymaking.
29.09.2017 kl. 13.00 - 16.00
Klinisk Institut, Aalborg Universitet og Aalborg Universitetshospital har den glæde at invitere til ph.d.-forsvar ved læge Jesper Moesgaard Rantanen, Nyremedicinsk Afdeling, som forsvarer ph.d.-afhandlingen: "Arrhythmias, Heart Rate Variability and Marine n-3 Polyunsaturated Fatty Acids in Patients on Chronic Dialysis"
29.09.2017 kl. 14.00 - 15.30
The seminar is open to all interested researchers!
02.10.2017 kl. 17.00 - 18.00
Mød uddannelsens faglige leder, Dorte Ågård, og hør mere om det faglige indhold. Bliv klogere på uddannelsens perspektiver og relevans i forhold til dit eget arbejdsområde eller interesseområde. Få svar på alle dine faglige og praktiske spørgsmål.
03.10.2017 kl. 13.00 - 16.30
Hør om de væsentligste ændringer, der forventes at komme i bygningsreglement BR18
04.10.2017 kl. 09.00 - 16.00
På dette kurset kan du lære, hvordan gulve, vægge og installationer kan udføres, så kravene i BR15 er overholdt, og så der opnås størst mulig sikkerhed mod skader fra vand og fugt.
04.10.2017 kl. 10.00 - 17.00
Writing has always been a key discipline to master within political sciences and humanities. Today writing articles and getting them published is more important than ever. Be it for the PhD-student using a collection of peer-reviewed and published articles as basis for the PhD, or for the young PhD aiming at a university career.
04.10.2017 kl. 13.00 - 17.00
Klinisk Institut, Aalborg Universitet og Aalborg Universitetshospital har den glæde at invitere til ph.d.-forsvar ved Steen Møller Hansen, Klinisk Epide-miologisk Afdeling, Aalborg Universitetshospital, som forsvarer ph.d.-afhandlingen: Opportunities and Limitations for Provid-ing Early Defibrillation of Out-of-hospital Cardiac Arrest Patients