Kakovost in kinetika sušenja bukovine in hrastovine v kondenzacijskih sušilnih komorah

diplomski projekt

Rok Zidar (Author), Aleš Straže (Reviewer), Željko Gorišek (Mentor)

Abstract

Primerjali smo učinkovitost kondenzacijskega sušenja bukovine in hrastovine, debeline 50 mm. Vrednotili smo čas sušenja, hitrost postopka, kakovost osušenega lesa in porabo energije. Sušenje je bilo izvedeno v industrijski kondenzacijski sušilni komori kapacitete 6 m3 s sušilnimi programi proizvajalca. Doseganje načrtovanih klimatskih pogojev smo preverjali z vzporednim sistemom zajemanja temperature, relativne zračne vlažnosti in lesne vlažnosti. Kontrolo kakovosti smo ocenjevali vizualno, s kontinuiranim spremljanjem vlažnostnega gradienta in z merjenjem notranjih napetosti. Sušenje bukovine in hrastovine je bilo v kondenzacijskih komorah časovno sprejemljivo od svežega stanja do vlažnosti 20 %, potem pa se je močno upočasnilo. Kakovost sušenja bukovine je bila zadovoljiva z izjemo notranjega obarvanja, medtem, ko se je pri hrastovini pojavil tudi večji vlažnostni gradient in potreba po dodatni fazi kondicioniranja. Energijsko je postopek sprejemljiv le pri sušenju svežega lesa, za dosuševanje do nižjih končnih vlažnosti pa priporočamo uporabo alternativnih postopkov.

Keywords

sušenje lesa;kondenzacijsko sušenje;kakovost sušenja;bukovina;hrastovina;

Data

Language:	Slovenian
Year of publishing:	2012
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[R. Zidar]
UDC:	630*847
COBISS:	2056585
Views:	1039
Downloads:	248
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Quality and kinetics of beech and oak wood drying in dehumidifier drying chambers
Secondary abstract:	We compared the efficiency of dehumidifier drying of beech and oak wood (50 mm thick). We evaluated the time, the speed of process, the quality of dried wood and energy requirement. The drying was performed in an industrial dehumidifier drying chamber (6 m3 capacity), according to the manufacturerʼs drying schedules. The specified climate conditions were verified using a parallel system of temperature measurements, relative air humidity and wood moisture content. Quality control was done visually, with continuous recordingof moisture gradient and with measurements of drying stresses. The drying of beech and oak wood was time efficient from the fresh state to 20 % moisture content; then significantly less. The quality of beech wood was satisfying, with the exception of inner colouring, meanwhile, the oak wood showed a higher moisture gradient and the need for additional conditioning phase. From the energy perspective, the process is acceptable only for drying of fresh wood, for additional drying up to lower final moisture content we recommend the use of alternative methods.
Secondary keywords:	wood drying;dehumidifier drying;drying quality;beech;oak;
Type (COBISS):	Diploma project paper
Thesis comment:	Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages:	IX, 45 f.
Keywords (UDC):	applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;agriculture and related sciences and techniques;forestry;farming;wildlife exploitation;kmetijstvo ter sorodne vede in tehnologije;forestry;gozdarstvo;forest products and their utilization;gozdni proizvodi in njihova uporaba;
ID:	22223