The Influence of the Properties of Thermal - Insulation Materials on the Thermomoist Indicators of a Building

2022 ◽  
Vol 906 ◽  
pp. 125-133
Author(s):  
Artashes Levoni Petrosyan
Keyword(s):  
Thermal Insulation ◽  
Residential Buildings ◽  
Building Construction ◽  
Insulation Material ◽  
Optimal Thickness ◽  
Electricity Prices ◽  
Water Condensation ◽  
Thermal Insulator ◽  
Significant Difference ◽  
Under Construction

One of the basic measures of energy efficiency in residential buildings is the reduction of heat and coolant pressure, when external structures - walls, ceilings - contain thermal insulation material, as a result of which heat and cold losses are reduced, as a result of air-and moisture permeability. Their number is largely determined by the climatic zone of the building, construction, sources of heat and cold, fuel and electricity prices in this region. In such practice, first of all, attention is paid to the problems of the optimal thickness of the thermal insulator, the installation location, since improper installation in the structure can cause water condensation, which will lead to partial wear of the structure, since the properties of reinforced-concrete layers will deteriorate. This concerns the peculiarities of carrying out thermal insulation works and their necessity both in under construction and in buildings in use. However, even in these conditions, when discussing the thermal effect of thermal insulation on structures, due attention is not paid to individual structures, especially walls, moisture problems. Consideration of insulators with more or less efficient energy and heat engineering characteristics, when it was found that there is a significant difference between their results and effects, aroused particular interest in the study of the problem. This is followed by a study of the influence of the presence of thermal insulation in the structure on the cold load required for cooling, revealed a pattern of cost changes in the case of insulating materials with more or less properties - foam.

scholarly journals Selection of optimal thickness of thermal insulation of modular buildings on the basis of multicriterial analysis

2020 ◽  
pp. 82-91
Author(s):  
V. Zhelykh ◽  
◽  
Yu. Furdas ◽  
S. Shapoval ◽  
M. Rebman ◽  
...  
Keyword(s):  
Thermal Insulation ◽  
Multicriteria Analysis ◽  
Theoretical Research ◽  
Expert Assessment ◽  
Insulation Material ◽  
Modular Construction ◽  
Optimal Thickness ◽  
Short Period ◽  
Modular Buildings ◽  
Selection Of

Today modular construction is gaining popularity in the arrangement of production facilities. The purpose of the research is the theoretical substantiation of the choice of the optimal thickness of thermal insulation for external protections of modular buildings taking into account the evaluation criteria based on the method of hierarchy analysis. The article reflects the possibility of using modular buildings for residential and public needs. Given the peculiarities of the use of thermal insulation materials, such structures are erected in a short period of time due to the use of ready-made modules. It is also proposed to use multicriteria analysis to compare different thicknesses of thermal insulation of a modular building. The obtained results are presented in the form of petal diagrams and diagrams of global priorities, which made it possible to make an in-depth assessment of several thicknesses of thermal insulation. When conducting theoretical research, it should be noted that the importance of each of the criteria was taken into account for the selection of thermal insulation. An expert assessment was performed to determine the thickness of thermal insulation, which can be used for lightweight prefabricated structures of modular buildings. As a result of research, it was found that the most suitable thermal insulation material is polyurethane.

scholarly journals Effect of insulation on indoor thermal comfort in a detached house with a floor heating system

2019 ◽  
Vol 111 ◽  
pp. 02049 ◽  
Author(s):  
Qianwen Guo ◽  
Ryozo Ooka ◽  
Wonseok Oh ◽  
Wonjun Choi ◽  
Doyun Lee
Keyword(s):  
Thermal Comfort ◽  
Thermal Insulation ◽  
Energy Savings ◽  
Residential Buildings ◽  
Insulation Material ◽  
Indoor Thermal Comfort ◽  
Detached House ◽  
The Impact ◽  
Floor Heating ◽  
Floor Temperature

Appropriate insulation materials, with unique physical properties and of moderate thickness, are essential for energy savings in residential buildings. However, the impact of thermal insulation on indoor thermal comfort with floor heating systems has not been studied extensively. In this study, simulations of a typical Japanese detached house were conducted with four different thicknesses of insulation material in the walls, ceiling, and floor to estimate the mean air temperature (MAT), mean radiant temperature (MRT), floor temperature, predicted mean vote (PMV) and predicted percentage of dissatisfied (PPD). The results showed that increasing the thickness of thermal insulation increased the MAT and MRT by 1.4 – 4.0 ℃ and 1.3 – 4.4 ℃, respectively. Moreover, as the thickness of the thermal insulation increased, the floor temperature rose and exhibited smaller fluctuations. Finally, it was found that increasing the thickness of thermal insulation improved the indoor thermal comfort environment, as evidenced by an increase in the PMV from –1.0 to 0.3, and a decrease in the PPD from 25.1% to 9.5%.

scholarly journals Prediction and Performance Investigation of Polyurethane Foam as Thermal Insulation Material for Roofing Sheet Using Artificial Neural Network

2021 ◽  
Vol 82 (1) ◽  
pp. 113-125
Author(s):  
V. B. Essien ◽  
Christian A. Bolu ◽  
Imhade P. Okokpujie ◽  
Joseph Azeta
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Polyurethane Foam ◽  
Thermal Insulation ◽  
Residential Buildings ◽  
Insulation Material ◽  
Indoor Temperature ◽  
Thermal Insulation Material ◽  
Artificial Neural ◽  
Roofing System

The prediction and application of Polyurethane Foam in developing roofing sheets cannot be over-emphasized when considering the environmental changes coursed by thermal radiation. This paper presents an artificial neural network application to model and predict the indoor temperature resistance of polyurethane (PU) roofing in residential buildings. The study employed a data logger to measure the indoor and outdoor temperatures for three simulation environments (i.e., morning, afternoon, and evening) for two hours each. Furthermore, the authors employed the Levenberg-Marquardt algorithm to transform and predict the indoor temperature obtained in the residential building's polyurethane roofing house. The result shows that the PU roofing system could absorb the heat and reduce the house model's temperature with 6.9% in the morning, afternoon 15.8%, and 6.8% in the evening when compared with the temperature outdoor environment. The ANN was also able to train, test, and validate the experimental temperature results with 92.86%, 93.92%, and 95%, respectively. The mean square error and a testing error occurs at 0.1707 and 0.1689. Therefore, this study concluded that ANN's application in predicting the thermal insulation material such as the PU roofing system is highly efficient and will increase the manufacturer's performance evaluation. It has also created significant awareness of the community in employing the PU roofing system for residential buildings, which will reduce the rate of energy consumption in buildings.

scholarly journals FIRE SPREAD MECHANISM ON SURFACE OF CONSTRUCTION FIT WITH FAÇADE HEAT INSULATION BASED ON COMBUSTIBLE INSULANT AND FINISHED WITH PLASTER

Fire Safety ◽  
2019 ◽  
pp. 96-103
Author(s):  
R. S. Yakovchuk ◽  
A. D. Kuzyk ◽  
S. O. Yemelyanenko ◽  
T. M. Skorobagatko
Keyword(s):  
Thermal Insulation ◽  
Heat Insulation ◽  
Residential Buildings ◽  
Fire Hazard ◽  
Protective Layer ◽  
Thick Layer ◽  
Fire Spread ◽  
Design Decision ◽  
Insulation Material ◽  
Safety Issues

The article is dedicated to the use of structures of external walls with facade insulation with plaster, which is widespread and popular in our country and abroad, as well as the problems associated with their fire hazard. The work of domestic and foreign researchers dealing with fire safety issues of facade systems has been analyzed. Classification of prefabricated systems of facade insulation is performed depending on the design decision, as well as on the main features in accordance with: the type of applied insulation material; a method of fastening a heat-insulating layer; composition of the base plaster layer; kind of decorative protective layer. The structure of prefabricated systems with complete sets of insulation with prefabrication of light, thick-layer plaster or fine-wares products is represented. The peculiarities of the processes that occur during combustion of the thermal insulation and finishing system of the outer walls of residential buildings are analyzed and revealed. Typical scenarios of fire spreading are presented with a surface of the design of external walls with a facade heat insulation with a fuel heater and a stucco coating. The mechanism of propagation of fire through a window opening by a surface of a facade heat insulation on the basis of foam polystyrene is described. The conclusion is made that the use of structures of exterior walls of residential buildings with facade insulation with combustible insulant and stucco coating significantly increases their level of fire hazard. This danger will depend on both the properties of individual materials (including insulant), as well as on the design features of the entire thermal insulation system and the building as a whole. For plaster systems, the thermal insulation of facades is a major threat to the rapid spread of fires on the floors above and below the building. The most common causes of thermal insulation fires is the transfer of fire from the windows during intense fire inside the rooms.

The Usage of Modern Inorganic Composite Material in the Design of Insulation of Unheated Smoke-Free Stairwells

2021 ◽  
Vol 410 ◽  
pp. 599-604
Author(s):  
Oleg V. Burlachenko ◽  
Oksana G. Chesnokova ◽  
Tatiana F. Cherednichenko
Keyword(s):  
Energy Efficiency ◽  
Composite Material ◽  
Composite Materials ◽  
Thermal Insulation ◽  
Thermal Protection ◽  
Residential Buildings ◽  
Foam Glass ◽  
Insulation Material ◽  
Thermal Insulation Material ◽  
Inorganic Composite

The article describes the problems that arise during the operation of unheated, smoke-free stairwells in multi-storey residential buildings. Measures are proposed for thermal protection of premises adjacent to stairwells of the H1 type. To solve the problems of improving the energy efficiency of the building, it is proposed to use modern thermal insulation material. In addition, a constructive solution is proposed for the insulation of the internal walls of an unheated, smoke-free stairwell using foam glass, which will ensure the strength, durability and reliability of thermal protection and finishing. Using modern composite materials, it is possible to improve the energy efficiency of the building.

scholarly journals Utilization of Water Hyacinth (Eichhornia crassipes) and Corncob (Zea mays) in Epoxy-based Biocomposite Board for Cool Box Thermal Insulation Material

2021 ◽  
Vol 891 (1) ◽  
pp. 012001
Author(s):  
N M K S Sruti ◽  
P R Jenaneswari ◽  
M R Rahayu ◽  
FA Syamani
Keyword(s):  
Thermal Conductivity ◽  
Thermal Insulation ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Bending Strength ◽  
Insulation Material ◽  
Thermal Insulation Material ◽  
Thermal Insulator ◽  
Useful Life ◽  
Effectiveness Assessment

Abstract Generally, the cool box is produced using styrofoam as the main thermal insulation material. However, the use of styrofoam potentially cause pollution to the environment at the end of its useful life because it cannot decompose naturally. The effort to overcome this problem is by producing thermal insulation materials from natural sources such as water hyacinth and corncob. The purpose of this study was to determine the characteristics of biocomposite board made from combination of water hyacinth powder and corncob ash based on physical, mechanical, and thermal conductivity analysis. Biocomposite boards were produced by introducing combination of water hyacinth powder and corncorb ash (5, 10, 15%wt) into epoxy resin. The ratio of water hyacinth powder and corncob ash were 100:0 (P0), 95:5 (P1), 90:10 (P2), 85:15 (P3). The biocomposite boards were also made from water hyacinth powder and corncob powder, which ratio of 15:85 (P4) and 0:100 (P5). The results of this research revealed that type P5 board had the lowest density value (0.927 g / cm3) and the lowest water absorption value (1.53%). The P2 type board shows the highest bending strength (8.6 N/mm2) which met the requirements of JIS A 5908 for particleboards type 8. The highest value of compressive strength was observed at P5 type board which was 2.94 ± 0.53 N / mm2. The lowest thermal conductivity values were observed at P2 type boards (0.305 W / mK). It can be concluded that, P2 type board had the best thermal insulator properties among other boards in this study. The thermal insulation effectiveness assessment of biocomposite board for cool box application was conducted using P2 and P5 type boards. The assessment results demonstrated that the styrofoam cool box and commercial cool box performance for maintaining temperature were superior compared to biocomposite cool box. Therefore, it is necessary to re-examine the biocomposite cool box, especially in terms of panel assembling and the shape of the lid, to produce biocomposite cool box with thermal insulator properties comparable to the commercial cool box.

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