Simulation study on dynamic heat transfer performance of PCM-filled glass window with different thermophysical parameters of phase change material

Zhong, Kecheng; Li, Shuhong; Sun, Gui Fang; Li, Shanshan; Zhang, Xiaosong

doi:10.1016/j.enbuild.2015.05.014

Cited by 115 publications

(65 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Charakterystyka termiczna MFZ zależy od szybkości akumulacji i oddawania ciepła, stanu skupienia oraz zakresu wahań temperatury. Niemniej jednak, współczynnik tłumienia obliczany w zmodyfikowany sposób był wykorzystywany do oceny efektywności zastosowania MFZ w przegrodach transparentnych [9] oraz pełnych [10].…”

Section: Wprowadzenieunclassified

Współczynnik Tłumienia Amplitudy Wahań Temperatury Izolacji Termicznej Modyfikowanej Materiałem Fazowo Zmiennym

Wieprzkowicz¹,

Heim²

2017

ZNPRzBiS

View full text Add to dashboard Cite

Celem artykułu jest wyznaczenie stabilności termicznej komponentu izolacyjnego modyfikowanego warstwą MFZ. Analiza została przeprowadzona w stanie niestacjonarnym na podstawie rozkładu temperatury w przekroju ściany. Zaprezentowane zostały wyniki obliczeń przeprowadzonych dla dwóch wprowadzonych przez autorów, zmodyfikowanych współczynników tłumienia (ZWT i ZWWT), pozwalających w pełni określić efekt zastosowania warstwy MFZ na stabilizację termiczną przegrody zewnętrznej. Współczynniki określono na podstawie analiz symulacyjnych w Polskich warunkach klimatycznych. Porównanie wyników uzyskanych dla przegrody referencyjnej oraz modyfikowanej warstwą MFZ pokazuje różnice w wartościach ZWT od kilku do kilkunastu procent zależności od analizowanego dnia wybranego okresu czasu.Słowa kluczowe: dynamika cieplna, symulacja komputerowa, ściana zewnętrzna, sezon ogrzewczy, budynek zero-energetyczny

show abstract

Section: Wprowadzenieunclassified

Współczynnik Tłumienia Amplitudy Wahań Temperatury Izolacji Termicznej Modyfikowanej Materiałem Fazowo Zmiennym

Wieprzkowicz¹,

Heim²

2017

ZNPRzBiS

View full text Add to dashboard Cite

show abstract

“…The surface temperatures, transmitted irradiances, heat fluxes and comfort performance of both the PCM glazing and the reference fenestration were measured during extensive experimental campaigns, in order to assess the energy performance of the technology under different boundary conditions. Starting from experimental results, the effects of thermo-physical parameters on the dynamic heat transfer performance of PCM were also investigated by means of numerical simulation softwares [13,23,30,[43][44][45]. The semi-transparent property of a glazing roof containing PCM and the effect of zenith angle on the thermal performance were only analysed numerically by Liu et al [46,47].…”

Section: Basic Technology: Integration Of the Pcm In Dgu Glazingmentioning

confidence: 99%

“…• in all the papers, the PCM had been macro-encapsulated in containers, that is, glass containers (70%) [12][13][14][15][20][21][22][23][24][25]27,[30][31][32][33][34][35][38][39][40][41], polycarbonate containers (20%) [16,17,19,28,36,42] and aluminium containers (10%) [18,26,29]; • the technologies had predominantly been characterised in outdoor test cells (57%) [14,15,17-22, 24-27,29,31,35] and through laboratory analysis (53%) [12,13,17,20,23,[32][33][34][35][36][37][38][39][40][41][42], while some other studies had been carried out by coupling a modelling activity with an experimental activity (37%) …”

Section: Literature Review At a Glancementioning

confidence: 99%

“…• the geographical distribution of the studies, which also provides an indication of the climatic conditions of the study; • the climatic/seasonal distribution of the studies: winter season (37%) [12][13][14][15][16][17][18][19][20][21][22], mid-season (10%) [14,15,20] and summer (50%) [13][14][15][16][17]20,[23][24][25][26][27][28][29][30][31] season periods; • the most investigated PCM typologies, that have been found to be paraffin wax (60%) [14][15][16]18,19,22,23,[25][26][27][28][29][30][31][32][33][34][35] and salt hydrates (20%) [12,13,…”

Section: Literature Review At a Glancementioning

confidence: 99%

See 1 more Smart Citation

Phase Change Materials in Transparent Building Envelopes: A Strengths, Weakness, Opportunities and Threats (SWOT) Analysis

et al. 2018

View full text Add to dashboard Cite

Abstract:Building envelopes can play a crucial role in building improvement efficiency, and the adoption of Phase Change Materials (PCMs), coupled with transparent elements, may: (i) allow a better control of the heat flows from/to the outdoor environment, (ii) increase the exploitation of solar energy at a building scale and (iii) modulate light transmission in order to prevent glare effects. Starting from a literature review, focused on experimental works, this research identifies the main possible integrations of PCMs in transparent/translucent building envelope components (in glazing, in shutters and in multilayer façade system) in order to draw a global picture of the potential and limitations of these technologies. Transparent envelopes with PCMs have been classified from the simplest "zero" technology, which integrates the PCM in a double glass unit (DGU), to more complex solutions-with a different number of glass cavities (triple glazed unit TGU), different positions of the PCM layer (internal/external shutter), and in combination with other materials (TIM, aerogel, prismatic solar reflector, PCM curtain controlled by an electric pump). The results of the analysis have been summarised in a Strengths, Weakness, Opportunities and Threats (SWOT) analysis table to underline the strengths and weaknesses of transparent building envelope components with PCMs, and to indicate opportunities and threats for future research and building applications.

show abstract

“…Li et al, 2016) and numerical (Goia, 2012;Ismail et al, 2008;Zhong et al, 2015) studies. A review of PCM technologies developed for transparent and translucent building envelope components can be found in (Silva et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Responsive glazing systems: Characterisation methods, summer performance and implications on thermal comfort

et al. 2017

View full text Add to dashboard Cite

Abstract:In recent years, there have been several experimental and numerical researches on transparent envelope components that integrate phase change materials (PCMs). To address some of the drawbacks of these systems, new prototypes were created and their summer performance was monitored under Cfa climatic conditions (Turin, Italy). The proposed glazing system comprises a triple glazing unit with a thermotropic layer placed on the outer side, acting as a switchable shading system capable of regulating the phase transition of the PCM. The PCM is tested in both the inner and the outer cavity of the glazing, alternately. In this paper, the summer performance of these responsive glazing systems is reported, complementing the assessment of their performance under winter conditions, which was previously presented in another paper (Bianco et al., 2017). Two additional systems were also tested in parallel for reference purposes: a triple glazing unit with a thermotropic layer only, and a reference triple glazing unit. Direct solar transmission was assessed, and the correlation between glazing temperature and solar transmission coefficient of the thermotropic layer, when coupled with the triple glazing unit, was derived. The solar transmission as a function of the external surface temperature of the PCM glazing units was also evaluated. The energy performance was assessed by means of a long-term evaluation in addition to daily analyses during cloudy and sunny days. The capability of the aforementioned technologies to improve indoor thermal comfort was investigated, with the effect of the transmitted solar radiation impinging on the occupants also taken into account. The results highlight that the integration of a thermotropic layer in a triple glazing unit allows the cooling load through the transparent component to be reduced by one third when compared to a traditional triple glazing unit. The overall energy performance was found to be primarily affected by the position of the PCM; not only during winter season, but especially in summer, the PCM completed the phase transition only when placed in the outermost cavity. The thermal comfort conditions were improved, when evaluated in terms of traditional PMV, regardless of the position of the PCM layer. However, when the influence of the direct solar radiation impinging on the occupants was taken into account, the solution with the PCM layer located in the inner cavity presented a better performance.

show abstract

Simulation study on dynamic heat transfer performance of PCM-filled glass window with different thermophysical parameters of phase change material

Cited by 115 publications

References 14 publications

Współczynnik Tłumienia Amplitudy Wahań Temperatury Izolacji Termicznej Modyfikowanej Materiałem Fazowo Zmiennym

Współczynnik Tłumienia Amplitudy Wahań Temperatury Izolacji Termicznej Modyfikowanej Materiałem Fazowo Zmiennym

Phase Change Materials in Transparent Building Envelopes: A Strengths, Weakness, Opportunities and Threats (SWOT) Analysis

Responsive glazing systems: Characterisation methods, summer performance and implications on thermal comfort

Contact Info

Product

Resources

About