Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Ulla Ojaniemi"'
Autor:
Ulla Ojaniemi, Timo Pättikangas, Tuomas Turpeinen, Atsushi Tanaka, Marjo Järvinen, Annika Ketola, Ari Jäsberg, Antti Koponen
Publikováno v:
Jäsberg, A, Turpeinen, T, Tanaka, A, Ketola, A, Järvinen, M, Ojaniemi, U, Pättikangas, T & Koponen, A I 2022, ' Fouling Dynamics of Simulated Milk Ultrafiltrate on a Plate Heat Exchanger ', Heat Transfer Engineering, vol. 43, no. 15-16, pp. 1387-1395 . https://doi.org/10.1080/01457632.2021.1963550
In this paper, the first experimental results related to fouling taking place at heat exchangers during heat treatment of milk is presented. Instead of milk, simulated milk ultrafiltrate was used and the experiments were conducted in a simplified mod
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cec73b182afeea040761ee71a779b83c
https://cris.vtt.fi/en/publications/b2ede118-fe15-4e11-8c94-52f0124d6a9a
https://cris.vtt.fi/en/publications/b2ede118-fe15-4e11-8c94-52f0124d6a9a
Publikováno v:
Ojaniemi, U, Pättikangas, T, Jäsberg, A, Puhakka, E & Koponen, A I 2022, ' Computational Fluid Dynamics Simulation of Fouling of Plate Heat Exchanger by Phosphate Calcium ', Heat Transfer Engineering, vol. 43, no. 15-16, pp. 1396-1405 . https://doi.org/10.1080/01457632.2021.1963551
A computational fluid dynamics (CFD) model was developed for fouling of calcium phosphate in heat exchangers which can consider the tendency of fluid components to precipitate and the surface properties of the materials. In the CFD model the precipit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ba0c65f77681879a4116b921c519961
https://cris.vtt.fi/en/publications/03e22777-e469-4eea-85cd-2a4b6bdaca07
https://cris.vtt.fi/en/publications/03e22777-e469-4eea-85cd-2a4b6bdaca07
Publikováno v:
Ojaniemi, U, Pättikangas, T, Jäsberg, A, Puhakka, E & Koponen, A 2020, CFD simulation of fouling of plate heat exchanger by phosphate calcium . in H Zettler (ed.), Proceedings of International Conference on Heat Exchanger Fouling and Cleaning – 2019 (Peer-reviewed) . Heat Transfer Research, pp. 45-52, Heat Exchanger Fouling and Cleaning XIII, 2019, Warsaw, Poland, 2/06/19 . < http://www.heatexchanger-fouling.com/proceedings19.htm >
VTT Technical Research Centre of Finland-PURE
VTT Technical Research Centre of Finland-PURE
A computational Fluid Dynamics (CFD) model was developed for fouling of calcium phosphate in heat exchangers which can take into account the tendency of fluid components to precipitate and the surface properties of the materials. In the CFD model the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::00b40c0ed8b4fb4703585b2c6388de54
https://cris.vtt.fi/en/publications/c8c5fd27-54a5-4b23-a7bb-5555504046da
https://cris.vtt.fi/en/publications/c8c5fd27-54a5-4b23-a7bb-5555504046da
Publikováno v:
Ojaniemi, U, Puranen, J, Manninen, M, Gorshkova, E & Louhi-Kultanen, M 2018, ' Hydrodynamics and kinetics in semi-batch stirred tank precipitation of L-glutamic acid based on pH shift with mineral acids ', Chemical Engineering Science, vol. 178, pp. 167-182 . https://doi.org/10.1016/j.ces.2017.12.029
The precipitation process of L-glutamic acid from monosodium glutamate solution through acidification is studied by using hydrochloric acid and sulphuric acid. Both experimental and modelling methods are applied. The experiments have been carried out
Autor:
Timo Pättikangas, Riitta L. Keiski, Ulla Ojaniemi, Mikko Manninen, Esa Muurinen, Tiina Pääkkönen, Carey J. Simonson
Publikováno v:
Pääkkönen, T M, Ojaniemi, U, Pättikangas, T, Manninen, M, Muurinen, E, Keiski, R L & Simonson, C J 2016, ' CFD modelling of CaCO 3 crystallization fouling on heat transfer surfaces ', International Journal of Heat and Mass Transfer, vol. 97, pp. 618-630 . https://doi.org/10.1016/j.ijheatmasstransfer.2015.11.099
Supersaturation of inversely soluble salts, like calcium carbonate, causes crystallization fouling on heated surfaces of heat exchangers. In this paper, crystallization fouling of calcium carbonate is studied by CFD modelling. Crystallization fouling
Autor:
Riitta L. Keiski, Esa Muurinen, Carey J. Simonson, Markus Riihimäki, Ulla Ojaniemi, Tiina Pääkkönen
Publikováno v:
Materials Science Forum. 762:493-500
Fouling of surfaces is a major challenge in design and operation of many industrial heat transfer equipment. Fouling causes significant energy, material and production losses, which increase the environmental impact and decrease economic profitabilit
Publikováno v:
Ojaniemi, U, Riihimäki, M, Manninen, M & Pättikangas, T 2012, ' Wall function model for particulate fouling applying XDLVO theory ', Chemical Engineering Science, vol. 84, pp. 57-69 . https://doi.org/10.1016/j.ces.2012.08.004
A computational fluid dynamics (CFD) model for particulate fouling in heat exchangers has been developed. Particulate fouling is generally considered as a serial process of the transport of the particles into the vicinity of the wall and the adherenc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1dc419702a53cfeab1e8fce83ecaf0f2
https://cris.vtt.fi/en/publications/586c1626-30ec-43d1-939b-fe5ee4285233
https://cris.vtt.fi/en/publications/586c1626-30ec-43d1-939b-fe5ee4285233
Publikováno v:
Pasanen, A, Ojaniemi, U, Olin, M & Liimatainen, M 1999, ' Methodology development for integrated pollution prevention ', Paper presented at 1999 AIChE Annual Meeting, Dallas, United States, 31/10/99-5/11/99 .
VTT Technical Research Centre of Finland-PURE
VTT Technical Research Centre of Finland-PURE
A methodology for applying IPPC directive (Integrated Pollution Prevention and Control, Council directive 96/61/EC) is introduced and demonstrated. For a plant development project this methodology provides a systematic procedure to be followed, assis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::8b2edbcfbb5496c166f5ae8e218bab80
https://cris.vtt.fi/en/publications/aec24922-b427-4593-baae-079d77a3f9de
https://cris.vtt.fi/en/publications/aec24922-b427-4593-baae-079d77a3f9de
Autor:
Ari Jäsberg, Tuomas Turpeinen, Atsushi Tanaka, Annika Ketola, Marjo Järvinen, Ulla Ojaniemi, Timo Pättikangas, Antti Ilmari Koponen
Publikováno v:
VTT Technical Research Centre of Finland-PURE
Jäsberg, A, Turpeinen, T, Tanaka, A, Ketola, A, Järvinen, M, Ojaniemi, U, Pättikangas, T & Koponen, A 2020, Fouling dynamics of SMUF on a plate heat exchanger . in H Zettler (ed.), Proceedings of International Conference on Heat Exchanger Fouling and Cleaning – 2019 (Peer-reviewed) . Heat Transfer Research, pp. 322-328, Heat Exchanger Fouling and Cleaning XIII, 2019, Warsaw, Poland, 2/06/19 . < http://www.heatexchanger-fouling.com/papers/papers2019/44_Jaesberg%20et%20al.pdf >
Jäsberg, A, Turpeinen, T, Tanaka, A, Ketola, A, Järvinen, M, Ojaniemi, U, Pättikangas, T & Koponen, A 2020, Fouling dynamics of SMUF on a plate heat exchanger . in H Zettler (ed.), Proceedings of International Conference on Heat Exchanger Fouling and Cleaning – 2019 (Peer-reviewed) . Heat Transfer Research, pp. 322-328, Heat Exchanger Fouling and Cleaning XIII, 2019, Warsaw, Poland, 2/06/19 . < http://www.heatexchanger-fouling.com/papers/papers2019/44_Jaesberg%20et%20al.pdf >
In this paper, we present our first experimental results related to fouling taking place at heat exchangers during heat treatment of milk. Instead of milk we used simulated milk ultrafiltrate (SMUF), which is an aqueous solution simulating the minera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::b3f782714522e3de3dd6d71bf9fd37ab
https://cris.vtt.fi/en/publications/be80a222-d6b5-44cb-be64-4120d14b1ace
https://cris.vtt.fi/en/publications/be80a222-d6b5-44cb-be64-4120d14b1ace