Research of Thermal and Moisture Transport within Compound Bamboo Wall with Different Moisture Content

2012 ◽  
Vol 517 ◽  
pp. 887-891
Author(s):  
Lin Lin Xiang ◽  
Nian Ping Li ◽  
Zhou Chen ◽  
Xue Wen Chen
Keyword(s):  
Thermal Conductivity ◽  
Numerical Analysis ◽  
Moisture Content ◽  
Energy Saving ◽  
Thermal Insulation ◽  
Water Evaporation ◽  
Advantages And Disadvantages ◽  
Building Enclosure ◽  
Saving Effect ◽  
Heat Preservation

In order to evaluate the energy-saving effect of the bamboo plywood as building enclosure, by measuring thermal conductivity of compound bamboo building enclosure with different moisture content, performance function between bamboo characteristic and thermal conductivity were deduced with numerical analysis method. First, we measured thermal conductivity with different moisture content. For the accuracy of data, we put a thin plastic film between the heating layer of the tester and the bamboo plywood to reduce water evaporation. Then we got the functional relation of moisture content and thermal conductivity, by using numerical analysis software. Finally, according to the national related standard and the performance of the bamboo plywood within different moisture content, we analyzed the advantages and disadvantages of the bamboo plywood as building enclosure. The results showed that the heat preservation and thermal insulation properties of bamboo plywood as construction materials are both stronger than traditional building materials such as reinforced concrete with different moisture content. Meanwhile, so as to ensure the heat preservation and thermal insulation properties and to achieve a good energy saving effect, wed better keep the moisture content of bamboo plywood in a low state.

Study and Application of Plastic Construction Materials

2011 ◽  
Vol 99-100 ◽  
pp. 1117-1120 ◽  
Author(s):  
Mao Quan Xue
Keyword(s):  
Thermal Conductivity ◽  
Corrosion Resistance ◽  
Energy Saving ◽  
Thermal Insulation ◽  
Flame Retardancy ◽  
Building Materials ◽  
Construction Materials ◽  
Low Thermal Conductivity ◽  
Building Walls

As new building materials, plastic has light weigh, corrosion resistance, low thermal conductivity, thermal insulation, waterproof, energy-saving, molding convenient, high recycling characteristic, widely used in building materials. According to the research of improving its flame retardancy, strength, thermal insulation, waterproof properties, the application of plastic use in doors and windows, pipeline, building walls and roofs of buildings, etc. were reviewed, and the developing direction was discussed.

Experimental Research on Producing Thermal Insulating Bonding Mortar by Spent Polystyrene Foam

2012 ◽  
Vol 174-177 ◽  
pp. 1253-1256
Author(s):  
Li Peng Cai
Keyword(s):  
Compressive Strength ◽  
Energy Saving ◽  
Thermal Insulation ◽  
Experimental Research ◽  
Polystyrene Foam ◽  
Thermal Insulating ◽  
Concrete Blocks ◽  
Aerated Concrete ◽  
Saving Effect ◽  
Insulation Performance

In this paper, thermal insulating bonding mortar has been produced by the spent polystyrene foam particles, cement, sand, tackifier and water etc. It shows that thermal insulation performance and compressive strength of thermal insulating bonding mortar are similar with those of aerated concrete by comparison tests. In this paper, the new wall is made by thermal insulating bonding mortar and aerated concrete blocks, and the results show the thermal insulating performance of this wall can be improved and its cold bridge impact can be eliminated too. Correspondingly, the energy saving effect of buildings can be improved rapidly.

scholarly journals Technical Characteristics and Energy Performance of Double Skin Faces: A Review

2021 ◽  
Vol 248 ◽  
pp. 01029
Author(s):  
Cui Xu ◽  
Qiao Xi ◽  
Qingsong Ma
Keyword(s):  
Energy Saving ◽  
Engineering Application ◽  
Energy Performance ◽  
Economic Benefits ◽  
Curtain Wall ◽  
Industry Standards ◽  
Ventilation Modes ◽  
Double Skin ◽  
Saving Effect ◽  
Heat Preservation

Double Skin Facades (DSFs) have the advantages of heat preservation, heat insulation, noise reduction and energy saving. Therefore, DSFs are gradually developing into a new direction of environmental protection and energy saving of the curtain wall. This article mainly introduces the technical characteristics of DSFs from two aspects: the geometric structures of the hot aisles and the ventilation modes. And this article systematically reviews more than twenty articles which have dealt with the energy performances: thermal performances and ventilation performances. The paper finishes with some conclusions: The unique structure of DSFs makes DSFs outstanding in terms of energy saving, ventilation. However, DSFs also have some shortcomings: the initial investment and maintenance costs are relatively high, the fire protection design is relatively difficult, and the industry lacks industry standards. Therefore, it is necessary to estimate the overall energy-saving effect in advance, continue to in-depth optimization research on the engineering application value of DSFs, and ultimately bring good social and economic benefits.

Energy-Saving Method Analysis in Plastic Products Industry

2013 ◽  
Vol 401-403 ◽  
pp. 2226-2229
Author(s):  
Tao Yong Li ◽  
Hao Wang ◽  
Ming Zhong ◽  
Chang Hai Miao
Keyword(s):  
Injection Molding ◽  
Energy Saving ◽  
Electric Energy ◽  
Electric Energy Consumption ◽  
Advantages And Disadvantages ◽  
Speed Regulation ◽  
Saving Mode ◽  
Saving Effect ◽  
Method Analysis ◽  
Plastic Products

Kinds of plastic injection molding machines were widely used in plastic products industry. The electric energy consumption of injection molding machine was an important part of the production cost of plastic products. Injection molding machines main energy saving methods such as the variable frequency speed regulation and electromagnetic heating were analyzed. The various methods of energy saving effect were evaluated through actual measurements, The advantages and disadvantages of various energy saving mode were also pointed out. The energy saving space and benefit in this industry was analyzed from the view of technology economy.

Energy Conservation Analysis on Self-Thermal Insulation Walls Structural System in Cold Areas

2012 ◽  
Vol 608-609 ◽  
pp. 1778-1782 ◽  
Author(s):  
Li Bai ◽  
Yi Ran Zhang ◽  
Jia Rui Chu
Keyword(s):  
Energy Conservation ◽  
Energy Saving ◽  
Thermal Insulation ◽  
Building Energy ◽  
Simulation Software ◽  
Air Conditioner ◽  
Building Energy Conservation ◽  
Modeling Analysis ◽  
Building Wall ◽  
Saving Effect

Analysis of Chinese current development status of wall insulation technology, aim at the importance of building energy conservation in cold areas. Point out that developing energy-saving building wall is the key to development of building energy saving. In this paper, put a kind of an advanced self-thermal insulation walls as an example in Changchun area. Adopt Tsinghua university’s building thermal environmental simulation software DeST-c. Modeling analysis of building’s heating air conditioner operation consumption in the whole year under three different kinds of walls. Through the comparison we know that the structure adopting new self-thermal insulation wall has the most remarkable energy saving effect.

Quality Control Measures of EPS External Thermal Insulation Board

2013 ◽  
Vol 361-363 ◽  
pp. 414-417
Author(s):  
Jie Zhang ◽  
Yun Xue
Keyword(s):  
Quality Control ◽  
Energy Saving ◽  
Thermal Insulation ◽  
Material Properties ◽  
North China ◽  
Control Measures ◽  
Insulation System ◽  
Engineering Applications ◽  
Saving Effect

EPS thermal insulation system is one of the wider applications of exterior insulation system in the area of North China. In engineering applications, it is extremely important to improve the thermal insulation engineering quality to familiar with the structure principle, strengthen strict re-inspection of the material properties , standardized operation and fine construction, but also conducive to ensure its energy-saving effect and durability.

Comprehensive Measures should be Taken for Exterior Window Thermal Insulating Energy-Saving

2013 ◽  
Vol 361-363 ◽  
pp. 327-330 ◽  
Author(s):  
Jie Zhang ◽  
Su Fen Dong
Keyword(s):  
Energy Saving ◽  
Thermal Insulation ◽  
Material Properties ◽  
North China ◽  
Insulation System ◽  
Engineering Applications ◽  
Thermal Insulating ◽  
Saving Effect

EPS thermal insulation system is one of the wider applications of exterior insulation system in the area of North China. In engineering applications, it is extremely important to improve the thermal insulation engineering quality to familiar with the structure principle, strengthen strict re-inspection of the material properties , standardized operation and fine construction, but also conducive to ensure its energy-saving effect and durability.

scholarly journals AERATED CONCRETE AS AN ENERGY-EFFICIENT MATERIAL FOR WALLS

2020 ◽  
pp. 59-67
Author(s):  
M.V. Zavoloka ◽  
◽  
Yu.M. Zavoloka ◽  
І.І. Grynyova ◽  
Yu.V. Zavoloka ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Moisture Content ◽  
Thermal Resistance ◽  
Energy Saving ◽  
Energy Efficient ◽  
Operating Conditions ◽  
Wall Material ◽  
Autoclaved Aerated Concrete ◽  
Technical Requirements ◽  
Aerated Concrete

Abstract. In the context of tightening the thermo-technical requirements for building envelopes, the benefits and advantages of energy-efficient wall material of autoclaved aerated concrete and aerated concrete products are shown. Domestic and foreign researches in the field of rational use of autoclaved aerated concrete for external walls in modern construction of energy-efficient buildings and optimization of structural solutions of aerated concrete walls are generalized. The most important thermos-physical characteristic for assessing the thermal resistance of external walls made of aerated concrete is the value of the thermal conductivity coefficient. The moisture content of aerated concrete has a significant effect on thermal conductivity, the release moisture is several times higher than the calculated moisture content stipulated by the standards for construction heat engineering and operating conditions. In the initial stages of construction, the moisture content of aerated concrete exceeds the moisture content established in the normative documentation by operating conditions, which requires recalculation of the thermal resistance of the walls of buildings taking into account the real moisture content of aerated concrete used during construction. A detailed explanation of the dependence of the heat flow through the enclosing structure on its resistance to heat transfer, established in the form of a hyperbola, is given, and the dependence of the difference in thermal conductivity on the moisture content of aerated concrete blocks is presented. When analyzing the effect of moisture on the thermal conductivity of aerated concrete, was used the characteristic deviation ± Δλ of thermal conductivity of aerated concrete in a wet state from the thermal conductivity of concrete in a dry state was used. Based on the results of the experiment carried out at OSACEA, the main conclusions and recommendations for determining the coefficient of thermal conductivity of aerated concrete in dry and wet conditions are given. Some aspects of energy saving in construction practice are presented, based on materials prepared by Doctor of Technical Sciences, prof. Gagarin V.G. The need to improve specific energy-saving measures is shown, which should be economically viable and not reduce the durability of construction objects. Generalized conclusions and recommendations are given.

scholarly journals Thermal Conductivity Characteristics of Thermal Insulation Materials Immersed in Water for Cold-Region Tunnels

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Youyun Li ◽  
Yongmei Sun ◽  
Yuan Zhuang ◽  
LiMin Duan ◽  
Ke Xie
Keyword(s):  
Thermal Conductivity ◽  
Moisture Content ◽  
Water Sample ◽  
Pore Water ◽  
Thermal Insulation ◽  
Water Distribution ◽  
Ct Scanning ◽  
Insulation Material ◽  
Insulation Materials ◽  
The Relationship

This study investigates the distribution of pore water on the basis of the measured mass moisture content after soaking the tunnel insulation material. This study also analyzes the influence of the distribution of pore water on the thermal conductivity of the material on the basis of this mass moisture content. Scanning images of phenolic and polyurethane insulation boards are obtained by computer tomography (CT). The gray volume moisture content (Gv) is deduced based on the CT scanning images, to determine the distribution of pore water (Gv is the ratio of the volume of the water sample (represented by the gray value) to the volume of the saturated water sample (represented by the gray value) which is the gray volume moisture content of the sample). The correlation between gray volume moisture content and mass moisture content is determined by comparing different algorithms of gray volume moisture content and volume moisture content. The relationship between mass moisture content and thermal conductivity can be determined using a self-made quasi-steady-state tester, whereas the relationship between gray volume moisture content and thermal conductivity can be derived indirectly. Related experimental research can predict the thermal conductivity of thermal insulation materials by using a new perspective and shows the influence of pore water distribution on the thermal conductivity of materials.

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