Experimental and Computational Study of the Temperatures Field Around a Chimney Roof Penetration

Neri, M.; Leppänen, Perttu; Bani, S.; Pentti, Matti; Pilotelli, Mariagrazia

doi:10.1007/s10694-015-0540-8

Cited by 17 publications

(22 citation statements)

References 9 publications

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“…Data presented in this paper support for previous works [1] , [2] , [3] , [4] , [5] , [6] , [7] , [8] , [9] , [10] , [11] , [12] , [13] on heat transfer at chimney-roof penetration. The data ( Fig.…”

Section: Datasupporting

confidence: 88%

“…In the experimental campaign extensively described in [1] , [2] , [3] , [4] , [5] , a chimney of 200 mm in diameter was installed in a corner test structure ( C ) and in an axi-simmetric test structure ( A ) respectively. The test structures described in [1] , [4] are both made of an interchangeable roof. The three roofs ( R1, R2, R3 ) installed in the experimental tests are described in [1] .…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

“…The three roofs ( R1, R2, R3 ) installed in the experimental tests are described in [1] . As illustrated in [1] , [2] , [3] , [4] , [5] , the clearance between chimney and roof was left open ( op ), sealed at the top and at the bottom with metal sheets ( ms ), sealed at the top and at the bottom with insulating panels ( ad ), and filled of insulating materials ( fi ) respectively.…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

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Data on temperature-time curves measured at chimney-roof penetration

Neri

Pilotelli

2018

Data in Brief

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Data on temperature-time curves measured at chimney-roof penetration are reported here. The tests were performed in different configurations in order to reproduce all the possible conditions in which a chimney may operate. To do this, a chimney was installed in a corner test structure and in an axi-simmetric test structure, and in three roofs of different thickness, thermal resistance, and layers position. The space between chimney and roof was left open, sealed with metal sheets, sealed with insulating panels, and filled of insulating material respectively.

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Section: Datasupporting

confidence: 88%

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

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Data on temperature-time curves measured at chimney-roof penetration

Neri

Pilotelli

2018

Data in Brief

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“…Furthermore, some studies have considered the optimization of the building envelope construction type and the selection of the insulation level for walls, roofs, floors [69,70] and/or chimney-roof penetrations [71][72][73][74]. Some of these researchers also discussed insulation thickness [75][76][77][78][79].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Traditional and Contemporary Building Envelope Construction Techniques in Terms of Thermal Comfort and Energy Efficiency in Hot and Humid Climates

Lotfabadi

Hançer

2019

Sustainability

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Expectations of traditional and contemporary buildings are different in terms of thermal comfort. Traditional buildings mostly achieve comfort through passive means, without HVAC support, but old levels of thermal satisfaction do not meet today’s expectations, although their passive thermal performances are notable for contemporary building designs. In this regard, the current study tries to investigate the possibility of comparing traditional and contemporary buildings’ construction techniques to achieve thermal comfort from an architectural point of view. In other words, is it possible to achieve passive building design by considering vernacular architecture principals as a reference? Likewise, how well can architects define insulation layers in contemporary construction surfaces in hot and humid climates? To this end, a dynamic, numerical, thermal calculation case study has been modeled in Famagusta, Northern Cyprus, to answer the above-mentioned questions. A mixed-use mode benefitting free-run periods is proposed and compared with a mode providing 24 hours of air-conditioning in different scenarios using the same initial settings. Thus, different floor-to-ceiling heights, insulation placements and indoor conditions have been tested separately in both winter and summer periods. The results show that thermal comfort can be achieved in free-run periods only during a limited percentage of the year. Furthermore, although increasing building heights may lead to a rise in the free-run periods, in contemporary buildings it increases the total energy usage of the buildings between 6% and 9% in the mixed mode. Therefore, vernacular architecture strategies are proper in their own context. However, this energy usage can still be controlled and optimized by such considerations as insulation material placement. In this regard, the best envelope properties for different building functions are proposed for application in hot and humid climates.

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“…These include, for example, the fact that the actual on-site flue gas temperatures are higher than assumed in chimney design [4,5], faulty installations, use contrary to operating instructions [6] and the smouldering combustion of mineral wool insulation [6][7][8]. Previous research by Neri et al [9][10][11] and Leppa¨nen et al [4,5,12] have also shown that the standard test set-up and conditions are often different from the actual site installations and may not always lead to a safe solution. All the above issues can increase the temperatures in the roof construction.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Smouldering Combustion of Mineral Wool Insulation in Chimney Penetrations

Leppänen

Malaska

2019

Fire Technol

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A large number of fires have been caused by metal chimney penetrations in recent years. One factor that has contributed to these occurrences is smouldering combustion within mineral wool, which is often used as insulation in metal chimneys and their penetrations. Based on reaction to fire performance mineral wool is typically classified as a non-combustible material and in European standards it belongs to category Euroclass A1. However, mineral wool insulation products contain organic material, which smoulders and generates heat at temperatures between 200°C and 500°C. Experimental research indicates that this additional heat may increase the temperature in the chimney penetration materials over 100°C for a limited period of time. The European fire classification of materials does not set requirements to control mineral wool smouldering and limit the subsequent heat release. This experimental study examined the smouldering of mineral wool insulation products specified for chimney penetrations and the heat release generated during the smouldering combustion. The aim of the study was to determine the actual level of temperature increase within the chimney penetration and to estimate the effects of the increase with regard to fire safety. The study also reviewed how the smouldering potential of an insulation material could be considered in the fire classification of products.

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Experimental and Computational Study of the Temperatures Field Around a Chimney Roof Penetration

Cited by 17 publications

References 9 publications

Data on temperature-time curves measured at chimney-roof penetration

Data on temperature-time curves measured at chimney-roof penetration

A Comparative Study of Traditional and Contemporary Building Envelope Construction Techniques in Terms of Thermal Comfort and Energy Efficiency in Hot and Humid Climates

Experimental Study on the Smouldering Combustion of Mineral Wool Insulation in Chimney Penetrations

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