Usage of Hydrophilic Mineral Wool Panels in Green Roof Systems in Passive Houses

2014 ◽  
Vol 1041 ◽  
pp. 75-78 ◽  
Author(s):  
Petr Vacek ◽  
Libor Matějka
Keyword(s):  
Thermal Properties ◽  
Thermal Insulation ◽  
Water Saturation ◽  
Green Roof ◽  
Mineral Wool ◽  
Building Envelope ◽  
Horizontal Drainage ◽  
Water Accumulation ◽  
Passive Houses

Hydrophilic panels can be used in extensive vegetation green roof systems as a soil replacement. They are lightweight (also with full water saturation), have certified thermal insulation properties in wet conditions and beyond all, they have laboratory approval of vertical and horizontal drainage ability, similar as a special drainage nep composites.Low weight of panels is further more advantageous in the intensive green roof systems and passive houses– static demands on roof and wall constructions can be dramatically decreased. Special water-accumulation panels can be used in retention roofs. Multiple-layered panels can help with thermal properties of building envelope of passive houses.

scholarly journals Determination of Optimum Envelope of Religious Buildings in Terms of Thermal Comfort and Energy Consumption: Mosque Cases

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6597
Author(s):  
Ahmet Bircan Atmaca ◽  
Gülay Zorer Gedik ◽  
Andreas Wagner
Keyword(s):  
Thermal Properties ◽  
Energy Consumption ◽  
Thermal Comfort ◽  
Thermal Insulation ◽  
Energy Savings ◽  
Gain Factor ◽  
Building Envelope ◽  
Comfort Level ◽  
Humid Climate ◽  
Savings Rate

Mosques are quite different from other building types in terms of occupant type and usage schedule. For this reason, they should be evaluated differently from other building types in terms of thermal comfort and energy consumption. It is difficult and probably not even necessary to create homogeneous thermal comfort in mosques’ entire usage area, which has large volumes and various areas for different activities. Nevertheless, energy consumption should be at a minimum level. In order to ensure that mosques are minimally affected by outdoor climatic changes, the improvement of the properties of the building envelope should have the highest priority. These optimal properties of the building envelope have to be in line with thermal comfort in mosques. The proposed method will be a guide for designers and occupants in the design process of new mosques or the use of existing mosques. The effect of the thermal properties of the building envelope on energy consumption was investigated to ensure optimum energy consumption together with an acceptable thermal comfort level. For this purpose, a parametric simulation study of the mosques was conducted by varying optical and thermal properties of the building envelope for a temperature humid climate zone. The simulation results were analyzed and evaluated according to current standards, and an appropriate envelope was determined. The results show that thermal insulation improvements in the roof dome of buildings with a large volume contributed more to energy savings than in walls and foundations. The use of double or triple glazing in transparent areas is an issue that should be considered together with the solar energy gain factor. Additionally, an increasing thickness of thermal insulation in the building envelope contributed positively to energy savings. However, the energy savings rate decreased after a certain thickness. The proposed building envelope achieved a 33% energy savings compared to the base scenario.

Study Concerning the Thermal Insulation Panels with Double-Side Anti-Condensation Foil on the Exterior and Polyurethane Foam or Polyisocyanurate on the Interior

2015 ◽  
Vol 660 ◽  
pp. 244-248 ◽  
Author(s):  
Simon Pescari ◽  
Dan Tudor ◽  
Stefan Tölgyi ◽  
Carmen Maduta
Keyword(s):  
Energy Efficiency ◽  
Economic Impact ◽  
Polyurethane Foam ◽  
Thermal Insulation ◽  
Economic Efficiency ◽  
Heating System ◽  
Energy Performance ◽  
Mineral Wool ◽  
Building Envelope ◽  
Insulating Materials

The paper aims to assess the energy performance of a thermal rehabilitated ground floor building by using new thermal insulation panels with double-side anti-condensation foil on the exterior and polyurethane foam or polyisocyanurate on the interior (PUR or PIR) in various ways. The study also wants to emphasize the benefits of using these insulating materials encouraging their further use. Therefore, five scenarios are carried out, four thermal rehabilitation scenarios and the reference building scenario, without thermal insulation. The obtained results are evaluated by comparison. The results point out the energy performance of PUR and PIR used as thermal insulation panels for the building envelope but also the economic impact and the economic efficiency that involves using such panels. This work is based on the energy efficiency requirements targeting the building envelope and takes into account mainly the behavior of the envelope elements while the heating system is treated in a simplified manner, considering its usual efficiency. The conclusions highlight the main advantages of using these panels for buildings thermal rehabilitation compared to other common materials, such as polystyrene or mineral wool.

scholarly journals ASSESSMENT OF ACOUSTIC AND THERMAL PROPERTIES OF AIRTIGHT WOODEN WINDOWS USED IN BALTIC AND SCANDINAVIAN COUNTRIES

2019 ◽  
Vol 27 (3) ◽  
pp. 135-143 ◽  
Author(s):  
Kęstutis Miškinis ◽  
Raimondas Bliūdžius ◽  
Vidmantas Dikavičius ◽  
Arūnas Burlingis
Keyword(s):  
Thermal Properties ◽  
Thermal Insulation ◽  
Air Permeability ◽  
Building Envelope ◽  
Acoustic Properties ◽  
Thermal Transmittance ◽  
Air Tightness ◽  
The One ◽  
Sound Reduction ◽  
Reduction Index

Windows are the one of the most important elements of a building envelope. Windows with appropriate acoustic and thermal properties can guarantee comfort and protection of indoor environment. The sound and thermal insulation of windows are influenced by various factors and one of them is air tightness. The aim of this study was to assess if airtight typical wooden windows used in Baltic and Scandinavian countries always have both good acoustic and thermal properties. For this purpose, sound reduction index (characterizes acoustic properties), thermal transmittance (characterizes thermal insulation properties) and air permeability (characterizes air tightness) of windows were determined in the laboratory. The results showed that airtight windows have various acoustic and thermal properties. This means that there is a negligible relationship between air permeability and acoustic properties, also between air permeability and thermal properties of windows.

Decreasing Negative Influence of Under-Flow Rainwater Inverted Green Roofs on Passive Houses, Using Accumulating Hydrophilic Mineral Wool Panels

2016 ◽  
Vol 824 ◽  
pp. 786-794
Author(s):  
Petr Vacek ◽  
Libor Matějka
Keyword(s):  
Negative Impact ◽  
Green Roof ◽  
Thermal Characteristics ◽  
Green Roofs ◽  
Negative Influence ◽  
Mineral Wool ◽  
Flowing Water ◽  
Negative Effect ◽  
Rainwater Runoff ◽  
Passive Houses

This paper focuses on safety rainwater runoff from inverted green roof construction. Water flowing between XPS insulation panels has negative impact on thermal characteristics of whole roof. This water deteriorates thermal efficiency of insulation and also microlayers which hinder diffusion are created. The negative effect is especially manifested in passive houses with inverted roof assemblies. The aim of the paper is to describe the negative effect of under-flowing water, to mention various types of green roof usage and the final assessment.

scholarly journals The determination of the thermal reliability criterion for building envelope structures

2019 ◽  
Vol 13 (2) ◽  
pp. 129-133
Author(s):  
Gennadiy Farenyuk
Keyword(s):  
Thermal Insulation ◽  
Building Energy ◽  
Energy Performance ◽  
Building Envelope ◽  
Time Analysis ◽  
Thermal Reliability ◽  
Thermal Failure ◽  
Reliability Criterion ◽  
Building Operation

The paper presents the basic methodical principles for the time analysis of the variations of envelope structures’ thermal insulation properties and for the substantiation of the thermal reliability criterion, which should allow the analysis of the actual parameters of heat losses during the operation of buildings. In the paper, the state of the envelope structures thermal failure, the concept of building thermal envelope thermal reliability and the principles of its rating are defined. The physical meaning and basic criterion of the envelope structure thermal reliability are formulated. The application of the thermal reliability criterion allows determining the probable variations in the thermal insulation properties during the building operation and, accordingly, the changes of the building energy performance over time.

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