Browsing by Author "Ozturk, S."

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Phase change material incorporated paper pulp sludge/gypsum composite reinforced by slag and fly ash for energy efficient buildings: Solar thermal regulation, embody energy, sustainability index and cost analysis
(Elsevier Ltd, 2024) Kucukdogan, N.; Sutcu, M.; Ozturk, S.; Yaprak, H.; Memis, S.; Gencel, O.; Ustaoglu, A.; Sari, A.; Hekimoglu, G.; Erdogmus, E.
This study focuses on the reuse of some industrial wastes in the development of innovative building materials and the thermal performance, environmental impacts and cost estimates of the gypsum composite material developed in the case of a phase change material impregnation. Lauryl alcohol (LA) was impregnated into paper pulp sludge (PPS) up to 45 % by weight without leakage to obtain shape-stable composites. The LA impregnated PPS (PPS/LA) was replaced with PPS at 50 % and 100 % by weight in gypsum composite. Characteristics of shape-stable composites were studied. Also, the physical, mechanical, thermal properties and solar thermoregulation tests of the produced gypsum composites were examined in addition to the embodied energy, CO2 emissions and cost analysis. The melting and solidification enthalpies of PPS/LA were found to be 100.4–100.1 J/g, with only a 0.5 % reduction in latent heat storage capacity after 500 cycles, and approximately 3 % after 1500 cycles. Although the presence of PPS/LA in the gypsum composite caused a slight decrease in compressive strength, it significantly improved solar thermoregulation performance, maintaining ambient temperatures 2.55 °C to 5 °C warmer at night and 5.3 °C to 13.8 °C cooler during the day. Gypsum composites containing the PPS/LA offer a suitable alternative for energy-efficient sustainable building application by reusing around 57 % of three different industrial wastes providing a waste-reducing environmental approach and a high level of indoor thermal comfort.
Phase change material incorporated paper pulp sludge/gypsum composite reinforced by slag and fly ash for energy efficient buildings: Solar thermal regulation, embody energy, sustainability index and cost analysis
(2024.01.01) Kucukdogan, N.; Sutcu, M.; Ozturk, S.; Yaprak, H.; Memis, S.; Gencel, O.; Ustaoglu, A.; Sari, A.; Hekimoglu, G.; Erdogmus, E.
This study focuses on the reuse of some industrial wastes in the development of innovative building materials and the thermal performance, environmental impacts and cost estimates of the gypsum composite material developed in the case of a phase change material impregnation. Lauryl alcohol (LA) was impregnated into paper pulp sludge (PPS) up to 45 % by weight without leakage to obtain shape-stable composites. The LA impregnated PPS (PPS/ LA) was replaced with PPS at 50 % and 100 % by weight in gypsum composite. Characteristics of shape-stable composites were studied. Also, the physical, mechanical, thermal properties and solar thermoregulation tests of the produced gypsum composites were examined in addition to the embodied energy, CO2 emissions and cost analysis. The melting and solidification enthalpies of PPS/LA were found to be 100.4-100.1 J/g, with only a 0.5 % reduction in latent heat storage capacity after 500 cycles, and approximately 3 % after 1500 cycles. Although the presence of PPS/LA in the gypsum composite caused a slight decrease in compressive strength, it significantly improved solar thermoregulation performance, maintaining ambient temperatures 2.55 degrees C to 5 degrees C warmer at night and 5.3 degrees C to 13.8 degrees C cooler during the day. Gypsum composites containing the PPS/LA offer a suitable alternative for energy-efficient sustainable building application by reusing around 57 % of three different industrial wastes providing a waste-reducing environmental approach and a high level of indoor thermal comfort.
Urban Heat Island From A 3d Modeling Perspective—A Review
(Springer Science and Business Media Deutschland GmbH, 2024) Yilmaz, D.; Ozturk, S.
The number of studies on the urban heat island has been increasing in recent years. Developments in geospatial analytics, especially in recent years, have made frequent use of three-dimensional 3D modeling techniques in urban heat island research. There is a limited number of studies in the literature that deals with a systematic review of planning strategies and 3D modeling techniques used that are effective in reducing the formation of urban heat islands. The study presents an evaluation of a total of 33 studies that evaluated planning strategies that are effective in reducing the urban heat island effect with 3D modeling. The studies were evaluated in 4 sections. While the parameters used in the studies were evaluated in the first part, a summary of the studies and the criteria they used were evaluated in the second part, and the techniques of the studies were evaluated in the third part. In the last part, the programs used in 3D modeling were evaluated. As a result of the evaluations, it has been determined that buildings, green areas, and pavements, which are the most effective factors in the formation of urban heat islands, should be taken into account in planning strategies. In these 33 studies examined, the cooling effect of green areas on urban areas comes to the fore. These studies show that it has been concluded that the 3D indicators reflect the temperature, built environment, and land cover/use relationship in the best way. This result shows that 3D spatial modeling techniques should be preferred more in urban heat island research since they better reflect 2D land cover variables.