but.committee	prof. Ing. Mirko Dohnal, DrSc. (předseda) Ing. et Ing. Aleš Horák, Ph.D. (člen) prof. RNDr. Jan Kohout, CSc. (člen) prof. Ing. Jaroslav Horský, CSc. (člen) doc. Ing. Pavel Štarha, Ph.D. (člen)	cs
but.defence	Dizertace byla kladně hodnocena s ohledem na její jak teoretickou tak aplikační úroveň.	cs
but.jazyk	angličtina (English)
but.program	Aplikované vědy v inženýrství	cs
but.result	práce byla úspěšně obhájena	cs
dc.contributor.advisor	Raudenský, Miroslav	en
dc.contributor.author	Astrouski, Ilja	en
dc.contributor.referee	Dohnal, Mirko	en
dc.contributor.referee	Horák, Aleš	en
dc.date.created	2016	cs
dc.description.abstract	This Ph.D. thesis is focused on theory and experimental investigations developing of new knowledge about polymeric hollow fiber heat exchanger (PHFHE). The state-of-the-art study of plastic heat exchangers shows that their usage is limited by several niches where their advantages significantly dominates, or where the use of non-plastic competitors is not impossible. On the other hand, plastic heat exchangers (and PHFHEs in particular) are devices of increasing interest. It is shown that use of small tubes (fibers) allows PHFHEs to be more competitive than conventional plastic heat exchangers. Small hydraulic diameter of a fiber causes high heat transfer coefficients, reduces thermal resistance of plastic wall and allows it to create light and compact design. Detailed study of fluid flow and heat transfer inside the hollow fiber showed that conventional approaches for single-phase laminar flow can be utilized. Poiseuille number equal to 64 and Nussel number about 4 are recommended to be used to predict pressure drops and heat transfer coefficient, respectively. Additional attention should be paid to careful determination of fiber diameter and liquid properties (viscosity). Scaling effects, such as axial heat conduction, thermal entrance region and viscous dissipation can be neglected. The study of outside heat transfer showed that heat transfer on fiber bunches are intense and are competitive to contemporary compact finned-tube heat exchangers. The Grimson approach showed clear correlation with experimental results and, thus is recommended to predict heat transfer coefficients on fiber bunches. Two types of fouling (particulate- and biofouling) of outer fiber surface were experimentally studied. It was found that particulate fouling by titanium oxide particles is not intense and deposits can be removed relatively easy. However, fouling is much more intense when it is associated with biofouling caused by wastewater. In this case, smooth and low-adhesive surface of plastic is not sufficient precaution to prevent deposit formation.	en
dc.description.abstract	This Ph.D. thesis is focused on theory and experimental investigations developing of new knowledge about polymeric hollow fiber heat exchanger (PHFHE). The state-of-the-art study of plastic heat exchangers shows that their usage is limited by several niches where their advantages significantly dominates, or where the use of non-plastic competitors is not impossible. On the other hand, plastic heat exchangers (and PHFHEs in particular) are devices of increasing interest. It is shown that use of small tubes (fibers) allows PHFHEs to be more competitive than conventional plastic heat exchangers. Small hydraulic diameter of a fiber causes high heat transfer coefficients, reduces thermal resistance of plastic wall and allows it to create light and compact design. Detailed study of fluid flow and heat transfer inside the hollow fiber showed that conventional approaches for single-phase laminar flow can be utilized. Poiseuille number equal to 64 and Nussel number about 4 are recommended to be used to predict pressure drops and heat transfer coefficient, respectively. Additional attention should be paid to careful determination of fiber diameter and liquid properties (viscosity). Scaling effects, such as axial heat conduction, thermal entrance region and viscous dissipation can be neglected. The study of outside heat transfer showed that heat transfer on fiber bunches are intense and are competitive to contemporary compact finned-tube heat exchangers. The Grimson approach showed clear correlation with experimental results and, thus is recommended to predict heat transfer coefficients on fiber bunches. Two types of fouling (particulate- and biofouling) of outer fiber surface were experimentally studied. It was found that particulate fouling by titanium oxide particles is not intense and deposits can be removed relatively easy. However, fouling is much more intense when it is associated with biofouling caused by wastewater. In this case, smooth and low-adhesive surface of plastic is not sufficient precaution to prevent deposit formation.	cs
dc.description.mark	P	cs
dc.identifier.citation	ASTROUSKI, I. Polymeric Hollow Fiber Heat Exchanger Design [online]. Brno: Vysoké učení technické v Brně. Fakulta strojního inženýrství. 2016.	cs
dc.identifier.other	89372	cs
dc.identifier.uri	http://hdl.handle.net/11012/57899
dc.language.iso	en	cs
dc.publisher	Vysoké učení technické v Brně. Fakulta strojního inženýrství	cs
dc.rights	Standardní licenční smlouva - přístup k plnému textu bez omezení	cs
dc.subject	Heat exchanger	en
dc.subject	microchannels	en
dc.subject	polymeric hollow fibers	en
dc.subject	plastics	en
dc.subject	forced convection	en
dc.subject	natural convection	en
dc.subject	heat transfer coefficient	en
dc.subject	pressure drop	en
dc.subject	particulate fouling	en
dc.subject	biofouling	en
dc.subject	Heat exchanger	cs
dc.subject	microchannels	cs
dc.subject	polymeric hollow fibers	cs
dc.subject	plastics	cs
dc.subject	forced convection	cs
dc.subject	natural convection	cs
dc.subject	heat transfer coefficient	cs
dc.subject	pressure drop	cs
dc.subject	particulate fouling	cs
dc.subject	biofouling	cs
dc.title	Polymeric Hollow Fiber Heat Exchanger Design	en
dc.title.alternative	Polymeric Hollow Fiber Heat Exchanger Design	cs
dc.type	Text	cs
dc.type.driver	doctoralThesis	en
dc.type.evskp	dizertační práce	cs
dcterms.dateAccepted	2016-05-04	cs
dcterms.modified	2016-05-06-13:37:52	cs
eprints.affiliatedInstitution.faculty	Fakulta strojního inženýrství	cs
sync.item.dbid	89372	en
sync.item.dbtype	ZP	en
sync.item.insts	2025.03.27 14:41:54	en
sync.item.modts	2025.01.15 22:23:01	en
thesis.discipline	Inženýrská mechanika	cs
thesis.grantor	Vysoké učení technické v Brně. Fakulta strojního inženýrství. Laboratoř přenosu tepla a proudění	cs
thesis.level	Doktorský	cs
thesis.name	Ph.D.	cs

Polymeric Hollow Fiber Heat Exchanger Design

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