The Thermal Insulation Design for Refuge Chamber

2013 ◽  
Vol 805-806 ◽  
pp. 1542-1546
Author(s):  
Can Cai Wang ◽  
De Gong Chang
Keyword(s):  
Thermal Insulation ◽  
Thermal Protection ◽  
Heat Insulation ◽  
Cooling System ◽  
Mineral Wool ◽  
Theory Analysis ◽  
Closed Chamber ◽  
Heat Transfer Theory ◽  
Protection Capability ◽  
Layer Mineral

For provide outstanding thermal insulation capacity for the refuge chambers, this paper firstly put forward a 5 layer heat insulation structure for refuge chambers. Mineral wool and acrogel were used as the heat insulation materials because of their excellent heat insulation and fire resistance capability. Then the paper determined the thickness of each layer by theoretic analyze using heat transfer theory, and found two 10 mm layers of acrogel and a 62mm layer mineral wool were ideal thickness. Then the paper designed the cooling system, according the heat analysis. And found the ice cake was best fit for refuge chambers, but it must equip with air flue to keep the enclosed air flowing. At last, 8 people were employed in the closed chamber for 106 hours, and raised outside temperature to 55°C for 5 hours. The chambers inside temperature was most controlled under 35°C. Then the paper increased the thickness of acrogel layer according to the experiment results at last. Theory analysis and experiment show that the designed heat insulation structure and cooling system had an excellent thermal protection capability.

The Comparison of Thermal Insulation Materials for a Process Pipeline

2018 ◽  
Vol 927 ◽  
pp. 176-182
Author(s):  
Polina A. Tretiakova ◽  
O.A. Stepanov ◽  
T.V. Tretyakova
Keyword(s):  
Natural Gas ◽  
Thermal Resistance ◽  
Thermal Insulation ◽  
Heat Insulation ◽  
Mineral Wool ◽  
Essential Property ◽  
Pressure Reduction ◽  
Insulation Materials ◽  
Materials Used

the article describes and compares thermal insulation materials used for heat insulation of a process pipeline transporting natural gas after its pressure reduction. The following thermal insulation materials are examined: mineral wool and cellular rubber substance. Linear thermal resistance has been chosen as the essential property of the materials.

Analysis of the Impact of Thermal Rehabilitation on the Heat Demand. Case Study

2021 ◽  
Vol 16 ◽  
pp. 170-176
Author(s):  
Stan Ivan Felicia Elena ◽  
Duinea Adelaida Mihaela
Keyword(s):  
Thermal Insulation ◽  
Thermal Protection ◽  
Mineral Wool ◽  
Expanded Polystyrene ◽  
Hot Water ◽  
Heat Consumption ◽  
Thermal Requirements ◽  
Heat Demand ◽  
The Impact

The article presents a case study on the impact of thermal rehabilitation of buildings heat demand. In order to reduce specific heat consumption and, in general, heat consumption for heating and hot water preparation, measures are needed to rehabilitate and modernize the thermal protection of buildings and heating and hot water installations. The present study aims to determine the influence of thermal rehabilitation of buildings (insulation of exterior walls - in this case) making for this purpose a comparison of the values of thermal requirements before and after the thermal rehabilitation process for a building. Regarding the thermal insulation used in the case study, expanded polystyrene with a thickness of 10 cm was used for the exterior walls and mineral wool for ceiling. The main purpose of the work is to highlight the importance of thermal insulation of buildings mainly in terms of reducing energy costs and maintaining thermal comfort in homes

scholarly journals Water resistance of thermal insulation composites with cellulose-containing filler

2021 ◽  
Vol 263 ◽  
pp. 01002
Author(s):  
Irina Susoeva ◽  
Tatiana Vakhnina ◽  
Andrey Titunin ◽  
Yuri Grunin
Keyword(s):  
Thermal Insulation ◽  
Water Resistance ◽  
Thermal Protection ◽  
Phenol Formaldehyde ◽  
Mineral Wool ◽  
Coefficient Of Thermal Conductivity ◽  
Scientific Significance ◽  
Insulating Properties ◽  
Experimental Substantiation ◽  
Properties Of Composites

One of the urgent tasks is the development of new thermal insulation materials to improve the energy efficiency of construction. In this work, new composites were obtained based on previously unused cellulose-containing waste. The theoretical and experimental substantiation of the possibility of increasing the water resistance of the heat-insulating composite has scientific significance. The features of the supramolecular structure of cellulose are analyzed. As a result of studies of the process of structure formation of a new heat-insulating material, it has been established that to ensure stable heat-insulating properties of composites from cellulose-containing waste, it is advisable to use a phenol-formaldehyde binder, water glass, or alumochromophosphate. The developed composite has a swelling 2.7 ... 3 times less, and water absorption 2.2 ... 2.4 times less than mineral wool slabs. The coefficient of thermal conductivity of the new composite material, depending on the type of cellulose-containing filler, ranges from 0.076 to 0.092 W/m∙K, which makes it possible to recommend it for use in thermal protection of buildings.

scholarly journals Innovative Building Technology Implemented into Facades with Active Thermal Protection

2021 ◽  
Vol 13 (8) ◽  
pp. 4438
Author(s):  
Daniel Kalús ◽  
Jozef Gašparík ◽  
Peter Janík ◽  
Matej Kubica ◽  
Patrik Šťastný
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Thermal Insulation ◽  
Thermal Protection ◽  
Waste Heat ◽  
Cooling System ◽  
Renewable Energy Sources ◽  
Radiant Cooling ◽  
Technological Waste ◽  
Innovative Solution

The article focuses on the description of an innovative solution and application of active thermal protection of buildings using thermal insulation panels with active regulation of heat transfer in the form of a contact insulation system. The thermal insulation panels are part of a prefabricated lightweight outer shell, which together with the low-temperature heating and high-temperature cooling system creates an indoor environment. The energy source is usually renewable energy sources or technological waste heat. Research and development of an innovative facade system with active thermal protection is in the phase of computer simulations and preparation of laboratory measurements of thermal insulation panels with various combinations of energy functions. In the article we present theoretical assumptions, calculation procedure and parametric study of three basic design solutions of combined energy wall systems in the function of low-temperature radiant heating and high-temperature radiant cooling.

scholarly journals Evolution regularity of temperature field of active heat insulation roadway considering thermal insulation spraying and grouting: A case study of Zhujidong Coal Mine, China

2021 ◽  
Vol 40 (1) ◽  
pp. 151-170
Author(s):  
Weijing Yao ◽  
Happiness Lyimo ◽  
Jianyong Pang
Keyword(s):  
Sensitivity Analysis ◽  
Temperature Field ◽  
Thermal Insulation ◽  
Wall Temperature ◽  
Heat Insulation ◽  
Surrounding Rock ◽  
Rock Temperature ◽  
Grouting Materials ◽  
Zone Radius ◽  
Thermal Conductivities

Abstract To study the active heat insulation roadways of high-temperature mines considering thermal insulation and injection, a high-temperature −965 m return air roadway of Zhujidong Coal Mine (Anhui Province, China) is selected as a prototype. The ANSYS numerical simulation method is used for the sensitivity analysis of heat insulation grouting layers with different thermal conductivities and zone ranges and heat insulation spray layers with different thermal conductivities and thicknesses; thus, their effects on the heat-adjusting zone radius, surrounding rock temperature field, and wall temperature are studied. The results show that the tunneling head temperature of the Zhujidong Mine is >27°C all year round, consequently causing serious heat damage. The heat insulation circle formed by thermal insulation spraying and grouting can effectively alleviate the disturbance of roadway airflow to the surrounding rock temperature field, thereby significantly reducing the heat-adjusting zone radius and wall temperature. The decrease in the thermal conductivities of the grouting and spray layers, expansion of the grouting layer zone, and increase in the spray layer thickness help effectively reduce the heat-adjusting zone radius and wall temperature. This trend decreases significantly with the ventilation time. A sensitivity analysis shows that the use of spraying and grouting materials of low thermal conductivity for thermal insulation is a primary factor in determining the temperature field distribution, while the range of the grouting layer zone and the spray layer thickness are secondary factors. The influence of the increased surrounding rock radial depth and ventilation time is negligible. Thus, the application of thermal insulation spraying and grouting is essential for the thermal environment control of mine roadways. Furthermore, the research and development of new spraying and grouting materials with good thermal insulation capabilities should be considered.

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