PCM akumulacija toplote v gradbenih materialih

diplomsko delo univerzitetnega študijskega programa I. stopnje

Jan Drofenik (Author), Darko Goričanec (Mentor), Danijela Doberšek (Co-mentor)

Abstract

Prvi del diplomskega dela predstavlja teoretično ozadje akumulacije toplote in način delovanja fazno spremenljivih snovi- PCM in glavne značilnosti le teh. Te smo razdelili v tri skupine in predstavili prednosti in slabosti posamezne skupine. V teoretičnem delu so prav tako predstavljeni postopki enkapsulacije PCM-ov, saj je ta ključna pri uporabi PCM v gradbeništvu. Nato pa se v drugem delu diplomskega dela posvetimo računskai analizi možnosti hlajenja notranjih prostorov v času višjih temperatur s pomočjo PCM-ov. Pri tem smo obravnavali različne načine aplikacije plasti s PCM-i v steni gradbenega objekta. Ugotovili smo, da lahko na splošno aplicirimo največ PCM-ov v steno, v primeru, če jih apliciramo v opeko. Prav tako smo ugotovili, da lahko z uporabo PCM-ov v steni, poljubno spreminjamo vrednost toplotnega toka skozi steno materiala, saj je odvisnost toplotnega toka skozi steno odvisna predvsem od vrednosti koeficientov toplotne prevodnosti PCM-ov in materiala, v katerega so ti aplicirani. Ker med maso PCM-ov v steni in količino toplote, ki jo lahko le ti akumulirajo, velja linearna povezava, je za dolgotrajno delovanje PCM-ov v steni bolje, če že na začetku v steno apliciramo večjo maso PCM-ov. Prav tako smo ugotovili, da je boljše, če se ob aplikaciji PCM v opeko, toplotni tok čez zid nekoliko poveča, saj to pomeni, da ima PCM višji koeficient toplotne prevodnosti, kot pa material v katero je apliciran. Višji koeficient toplotne prevodnosti PCM-a pomeni, da lahko le ta hitreje sprejema in oddaja toploto.

Keywords

akumulacija toplote;fazno spremenljive snovi;enkapsulacija;shranjevanje toplote;prenos toplote;diplomske naloge;

Data

Language:	Slovenian
Year of publishing:	2017
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	[J. Drofenik]
UDC:	536.491:692.2(043.2)
COBISS:	20687382
Views:	1570
Downloads:	262
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	PCM accumulation of heat in construction materials
Secondary abstract:	The first part of the bachelor thesis is the theoretic part. In this part we theoretically present thermal energy storage and phase change materials. We present the principle of thermal energy storage using the PCM and divide PCMs into three main grups. Then we describe the pros and cons of each of those three groups. In the last part of the theoretic part we describe the encapsulation techniques of the PCMs. Encapsulation of the PCM is the key for use of PCM in buildings. In the second part of bachelor thesis we focus on mathemathic analysis of use of phase changing materials for cooling of buildings in the summer heat. We have dealt with four types of applications in layer of the wall. We found out that we can apply the most mass of the PCM if we apply it into the brick We also found out we can change heat flux anyway we want, because heat flux mostly depends on the value of thermal conductivity coeffient of the PCM and on the value of thermal conductivity coefficient of the material in which it is applied. There is linear connection between the mass of the PCM and the heat, that PCM can accumulate and because of that we must use the highest allowed amount of mass of the PCM, so we can use the benefits of PCMs as long as we can. With the application of the PCM in the wall we look to sligthly increase the heat flux throughout the wall, because this means that the thermal conductivity coefficient of the PCM is higher than the thermal conductivity coefficient of the materials in which it is applied. Higher thermal conductivity coefficient of the material means that it can store and release heat faster.
Secondary keywords:	heat accumulation;phase change materials;encapsulation;thermal energy storage;heat transfer;
URN:	URN:SI:UM:
Type (COBISS):	Bachelor thesis/paper
Thesis comment:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages:	XI, 51 str.
ID:	10845411