| 1. |
- Dabaieh, Marwa, et al.
(author)
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A vernacular approach to passive cooling for low-income populations in informal settlements in hot climates
- 2021
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In: Earthen and wood vernacular heritage and climate change. - Lund : Lunds universitet. - 9789172674462 - 9789172674479 ; , s. 84-89
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Conference paper (peer-reviewed)abstract
- With the rise in frequency of severe climate change events, more and more vulnerable populations are suffering from extreme heat waves. This paper explains a hands-on experimental approach to testing vernacular passive cooling strategies using traditional Shisha clay funnels for the hot and dry Egyptian climate. Several clay funnels were investigated in terms of shape, size and form. The clay funnels were measured and simulated for their efficiency in accelerating air flow inside residential units and ability to enhance the air velocity if used in combination with cross ventilation strategies. Computer Fluid Dynamics (CFD) simulations were conducted in ANSYS Fluent to understand the airflow behaviour inside the simulated test shoe boxes resembling living rooms - using the standard k-ε turbulence model - for single and multi-unit configurations. The results showed significant enhancement in air flow and air speed inside the test room compared to using the conventional windows. Further continuation for this study is needed for testing the thermal performance and the ability of the Shisha clay funnels to reduce indoor air temperature. The study proved that inspiration can be drawn from passive vernacular strategies to enhance thermal comfort and reduce the impact of climate change especially in hot and dry climates.
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| 2. |
- Lindblad, Linda, et al.
(author)
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Challenges in Pine Tar Production and Practices for Sustainable Preservation of Swedish Wooden Heritage
- 2021
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In: Proceeding Earthen and wood vernacular heritage and climate change i Lund, Sweden, 29-30 August 2021, Ed. Marwa Dabaieh. - Lund : Malmö högskola. - 9789172674462
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Conference paper (peer-reviewed)abstract
- The paper adress that the living Nordic tradition of using pine tar, made from Pinus Sylvestris, to protect wooden shingle roofings and walls is endangered due to generational changes, lack of raw materials and quality criteria of the product. In the management of heritage buildings, an increasingly warmer climate has put in focus the challenges of maintaining wooden roofs when it comes to durability and costs. The margins for low quality in material are smaller in a warmer climate, since they degrade more rapidly. The aim of the research presented is to stimulate a small-scale production of pine tar by mapping and reviewing historical instructions and by documenting traditional pine tar kilns still in use by local historical associations.
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| 3. |
- Lindblad, Linda, et al.
(author)
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Re-inventing vernacular log timber knowledge systems for future regenerative building
- 2021
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In: Proceeding Earthen and wood vernacular heritage and climate change i Lund, Sweden, 29-30 August 2021, Ed. Marwa Dabaieh. - Lund : Malmö högskola. - 9789172674462
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Conference paper (peer-reviewed)abstract
- Log timber houses have been a dominant building tradition in Scandinavia with perspective on the past 1000 years. In the last century however this wooden mass wall construction technique and its embedded traditional knowledge has been marginalized, and to a large extent outcompeted by modern insulated framework and concrete construction. A heritage of knowing, building and dwelling has been left behind without advocacy or coherent assessment, for what reason the sustainable qualities of the log timber building is not measured or developed according to the contemporary norms of construction. There are great potentials to re-using traditional knowledge and adapting traditional log timber techniques for future sustainable building.
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| 4. |
- Strandberg, Paulien, et al.
(author)
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Moisture Levels in Historic Timber Walls Insulated with Hemp-Lime
- 2021
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In: Proceedings of the International Conference on Earthen and Wood Vernacular Heritage and Climate Change. - 9789172674462 ; , s. 122-127
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Conference paper (peer-reviewed)abstract
- The European Union has a low-carbon roadmap that aims at reducing greenhouse gas emissions toprevent further climate change and achieve climate-neutrality by 2050. Many of the historical buildings that wehave today will still be around in 2050. Hence, there is a need to improve their energy performance. A way to dothis is to use hemp-lime as a material for renovation. Hemp shiv, the woody core parts of the hemp stem, can beused in combination with building limes to create a sustainable building material. Visby (a UNESCO World HeritageSite) is the capital of the Swedish island Gotland. It is dominated by historical timber houses with post-and-plankwalls. To improve air tightness and to reduce fire risks these timber houses were historically rendered with a thicklime render.The aim of this paper was to study moisture levels in two walls; one with a lime render and another with a hemplime render to determine the feasibility of using hemp-lime as an insulation material for retrofitting historic postand-plank walls. Two full-scale façades were constructed at Lund University, with a post-and-plank wall with athick lime render and a similar wall with a hemp-lime render. The façades had two different surface finishes: anair lime and a natural hydraulic lime, allowing for a comparison between the two. Moisture levels inside thefaçades were monitored for more than one year.
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