Thermophysical indicators of elaborated sandwich cladding constructions with heat-reflective coverings and air gaps

Zhangabay, Nurlan; Baidilla, Islambek; Tagybayev, Askhat; Suleimenov, Ulanbator; Kurganbekov, Zhangeldi; Kambarov, Medetbek; Kolesnikov, Alexandr; Ibraimbayeva, Gulnaz; Abshenov, Khassen; Volokitina, Irina; Nsanbayev, Bakhytzhan; Anarbayev, Yermek; Kozlov, Pavel

doi:10.1016/j.cscm.2023.e02161

Cited by 10 publications

(10 citation statements)

References 38 publications

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“…To determine the heat resistance, humidity, and air conditions of the newly designed structures of the external fence, the corresponding procedure for calculating the norm was applied [39]. The processing of the results of the parameters was carried out in the Maple computer algebra software; the value of the thermal resistance of the structures was taken according to the earlier works [20,22,23], studied on the basis of finite element modeling in the ANSYS software [42]. An analysis of the traditional (Scheme 1) and designed (Schemes 2-5) (Fig.…”

Section: Discussion Of Results Of the Analysis Of Thermophysical Para...mentioning

confidence: 99%

“…Our study to identify the features of the thermophysical parameters of energy-efficient designed structures of an external fence with air channels is part of the research reported in [20,[22][23][24]. As a limitation of this study, one can note the issue of the influence of ventilated channels, as well as their geometry, which were not taken into account.…”

Section: Discussion Of Results Of the Analysis Of Thermophysical Para...mentioning

confidence: 99%

“…1) with air channels was carried out on the basis of [39][40][41]. The study is a continuation of works [20,[22][23][24] where the boundary and initial conditions, the geometric dimensions of the structure layers, as well as the thermophysical characteristics of the materials of the structure layer are similar [20,22,23].…”

Section: The Study Materials and Methodsmentioning

confidence: 99%

“…The calculations were carried out in the Maple computer algebra system; the value of the thermal resistance of the structures was taken according to [20,22,23], which was previously found by a finite-element method in the ANSYS software [42].…”

Section: The Study Materials and Methodsmentioning

confidence: 99%

“…The literary sources include a number of works tthat consider enclosing structures with air gaps, which are mostly traditional [17], and do not tackle the issue of closed gaps in the presence of heat-reflecting screens [18]. Experimental studies were also carried out to determine the optimal thickness of the air gap between the walls and thermophysical parameters without taking into account the thickness of the inter layers [19,20] and numerical studies using various methods [21], as well as the effect of the heat-insulating layer on the thermal resistance of the fence with air channels [22] and designed new structures with interlayers [23]. However, in the cited works [21][22][23], there are certain limitations in terms of the geometry of the ventilated duct, consideration of not all thermophysical parameters, or considered not in all climatic environmental conditions.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

See 4 more Smart Citations

Revealing patterns of thermophysical parameters in the designed energy-saving structures for external fencing with air channels

Tagybayev,

Zhangabay,

Suleimenov

et al. 2023

EEJET

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This study reports the design of new models of energy-saving enclosing structures with air channels. To calculate the thermophysical parameters of external fences, the Maple computer algebra system was used; the value of thermal resistance of structures was determined on the basis of a finite-element method in ANSYS. The result of the structure analysis showed that the value of thermal inertia of the traditional design and the average value of the thermal inertia of the developed structures were equal. However, the vibration amplitude of the designed enclosing structures was up to 20.72 % more efficient than the traditional one. At the same time, it was revealed that the air gaps did not affect the thermal inertia of the strucure, and its parameters depended only on the total thickness of the material. The analysis showed that the vapor permeability of the inner wall of the designed structures was equal to the traditional one. However, the value of resistance to vapor permeation of the fence of the developed structures was 3.21 % more effective. At the same time, the use of a closed air layer with a heat-reflecting screen makes it possible to shift the possible condensation zone towards the outer surface of the fence. An analysis of the check for the non-condensation of condensate in the ventilated air gap showed that condensate did not fall out in the ventilated air gap in all the considered schemes, and the results of the analysis by the air permeability value showed that all fencing schemes met the requirements for air permeability. Solving the problems of energy saving in construction through the development of new energy-efficient designs of enclosing structures help reduce the cost of thermal energy of buildings, which is an urgent task all over the world today

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Section: Discussion Of Results Of the Analysis Of Thermophysical Para...mentioning

confidence: 99%

Section: Discussion Of Results Of the Analysis Of Thermophysical Para...mentioning

confidence: 99%

Section: The Study Materials and Methodsmentioning

confidence: 99%

Section: The Study Materials and Methodsmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

See 3 more Smart Citations

Revealing patterns of thermophysical parameters in the designed energy-saving structures for external fencing with air channels

Tagybayev,

Zhangabay,

Suleimenov

et al. 2023

EEJET

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Investigation of the impacts of the thickness of the composite material on the temperature regime of energy-saving fencing of the outer wall with closed vertical wind channels

Zhangabay

2024

E3S Web Conf.

Self Cite

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The proposes of investigation are the energy-saving facade structures with closed vertical canals, which were analyzed in ANSYS medium with finite elemental technique. An analysis of temperature lag of designed structures with vertical closed canals evidenced that contraction in frost protection material volume from 0.08 m3 to 0.055 m3 per 1 m2 gives rise to significant contraction in the temperature lag of outer shells in case with a heat directing shield up to 24.55%, and in case without a heat directing shield up to 26.9%. An analysis was also made of the heat directing shield influence on the temperature lag of a new structure, which evidenced that in case of the heat directing shield in vertical closed canals, the structure’s efficiency in terms of temperature lag value increases up to 20%, depending on external climate conditions. Since energy saving is the main problem all over the world, the investigation data can be realized in buildings’ design, construction, reconstruction, with a view to save heat release rate. At the same time, the use of the developed structures with a heat-reflecting screen with closed vertical channels leads to an increase in the temperature lag indicator, depending on external climatic conditions, by 8.5-20%.

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Study of heat protection of external envelopes of a residential building in the cold period

Zhangabay,

Giyasov,

Ybray

et al. 2024

E3S Web Conf.

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In the study a full-scale thermovisional survey was carried out in the cold period of time of a multi-apartment residential building located in the Northern part of the Republic of Kazakhstan. The result of the survey showed the presence of significant problems on heat protection, where according to the analysis of thermograms of external wall envelopes it was revealed that almost all living rooms have envelopes with a negative value of heat protection, which does not meet existing standards. The analysis of thermograms of all rooms showed the existing problems on thermal stability of external wall envelopes, as the temperature difference between the inner surface of the external envelope and the internal air temperature ranged from 5.5 °C to 19.7 °C, where the difference reached 49 times in some places, depending on the living room. Analysis of thermograms of window openings also showed a lot of deviations. Thus, thermograms of window apertures showed deviations from sanitary-hygienic norms on dew point value from 12°C to 26.2°C depending on the living room. The revealed deviations on thermal protection of external envelopes are the main sources of heat energy loss and indicate the presence of problems on thermal stability of external envelopes in the cold period, which require special attention. In this regard, the obtained results of this study will be further taken into account in the development of new and optimization of existing wall envelope structures, taking into account the climatic features of the Republic of Kazakhstan.

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Thermophysical indicators of elaborated sandwich cladding constructions with heat-reflective coverings and air gaps

Cited by 10 publications

References 38 publications

Revealing patterns of thermophysical parameters in the designed energy-saving structures for external fencing with air channels

Revealing patterns of thermophysical parameters in the designed energy-saving structures for external fencing with air channels

Investigation of the impacts of the thickness of the composite material on the temperature regime of energy-saving fencing of the outer wall with closed vertical wind channels

Study of heat protection of external envelopes of a residential building in the cold period

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