The Heat and Mass Transfer Analysis of a Leaf

Yue, Hong; Yuan, Zhi Qing; Shuan-Qin, Zhang

doi:10.1016/s1672-6529(13)60212-7

Cited by 58 publications

(13 citation statements)

References 14 publications

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Section: Adaptability In Nature and Bio-absmentioning

confidence: 99%

“…The number of stomatal openings varies in different species according to the climatic influences as stoma loses water. For instance, desert plants lack in stomata while tropical plants have higher numbers of stomata [62][63][64]. In engineering and design this is different, where a system is often designed to achieve one function and it does not reconfigure itself.…”

Section: Adaptability In Nature and Bio-absmentioning

confidence: 99%

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A Framework to Achieve Multifunctionality in Biomimetic Adaptive Building Skins

et al. 2020

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Building skins should host multiple functions for increased performance. Addressing this, their design can benefit by learning from nature to achieve multifunctionality, where multifunctional strategies have evolved over years. However, existing frameworks to develop biomimetic adaptive building skins (Bio-ABS) have limited capabilities transferring multifunctionality from nature into designs. This study shows that through investigating the principles of hierarchy and heterogeneity, multifunctionality in nature can be transferred into biomimetic strategies. We aim at mapping the existing knowledge in biological adaptations from the perspective of multifunctionality and developing a framework achieving multifunctionality in Bio-ABS. The framework is demonstrated through the case study of Echinocactus grusonii implemented as a Bio-ABS on a digital base-case building. The methods include the Bio-ABS case study demonstrating the framework and simulating the performance of the case study and base-case building to comparatively analyze the results. The outcomes are a framework to develop multifunctional Bio-ABS and simulation results on the performance improvement Bio-ABS offer. The performance comparison between the Bio-ABS and base-case building show that there is a decrease in the discomfort hours by a maximum of 23.18%. In conclusion, translating heterogeneity and hierarchy principles in nature into engineered designs is a key aspect to achieve multifunctionality in Bio-ABS offering improved strategies in performance over conventional buildings.

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Section: Adaptability In Nature and Bio-absmentioning

confidence: 99%

Section: Adaptability In Nature and Bio-absmentioning

confidence: 99%

A Framework to Achieve Multifunctionality in Biomimetic Adaptive Building Skins

et al. 2020

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“…The second is to simulate vegetation into a porous zone [11,43] and reduce the temperature due to the transpiration latent heat being controlled by an energy source term, which is directly reduces energy. This assumes that heat absorption by heat convection on the leaf surface is insignificant, as leaf temperature is similar to air temperature [47]. These two methods can lead to different simulation results.…”

Section: Transpiration Heat Absorption and Water Releasementioning

confidence: 99%

The Effects of the Layouts of Vegetation and Wind Flow in an Apartment Housing Complex to Mitigate Outdoor Microclimate Air Temperature

2019

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Previous studies have demonstrated that vegetation and increased air flow can mitigate air temperature by employing numerical models, satellite remote sensing or Computational Fluid Dynamics simulations. This study aimed to examine how layouts of vegetation space and wind flow affect microclimate air temperature, which directly affects city dwellers’ thermal comfort in summer, in a real apartment housing complex in Seoul, South Korea. To do this, a Reynolds-averaged Navier–Stokes model was utilized, combined with a finite volume method CFD simulation, and which measured transpirational cooling effects of vegetation by comprehensively considering air humidity by transpiration, as well as wind flow of the surroundings, to reflect actual conditions of urban environments. Based on the computational model, nine scenarios including elevated building designs were simulated. The findings of this study are as follows: First, different layouts of vegetation and wind flow clearly affected microclimate air temperature in the housing complex. Second, when the total area of vegetation was the same, it was more effective to reduce air temperature by placing it in small units rather than concentrating it in one place, and placing small vegetation spaces close to buildings was better than locating them between buildings. Third, it was apparent that an elevated space works as a wind path, leading to increasing wind velocity. However, it was revealed that wind flow does not always positively affect hot temperatures.

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“…Radiasi hasil intersepsi dikonversi menjadi energi dalam neraca energi. Penelitian ini menggunakan konsep neraca energi pada daun tanaman (Gutschick, 2016;Ye et al, 2013), yang terdiri dari sensible heat flux (H) dan latent heat flux (HL). Kedua energi tersebut digunakan untuk memanaskan udara dan penguapan air oleh tanaman.…”

Section: Pendahuluanunclassified

Model Simulation of Soybean (Glycine Max (L.) Merrill) Growth by Energy Balance Approach

Syofwan

Handoko

2018

J.Agromet

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Intercepted solar radiation by leaf will influence energy balance in plant. The energy balance in leaf is a complex process, which results in biomass growth. Here, we modeled leaf energy balance to estimate dry matter growth in soybean. In the field, we measured intercepted radiation in canopy (1 meter above surface) with two treatments: soybean with 50% shading (N50%M0) and no-shading (N0%M0) twice a week. Then we sampled a biomass with destructive technique every week in each treatment. Our results showed that the intercepted radiation in no-shading treatment was higher (400 J/m2) than those in shading one (250 J/m2). The results were consistence with the high biomass growth at 12 weeks after planting, which observed in no-shading treatment. Then we validated our model by 1:1 plot test. Our finding revealed that no-shading treatment showed a good agreement with the observed biomass (closed to 1:1 plot), whereas the shading treatment tended to predict under estimate of biomass.

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The Heat and Mass Transfer Analysis of a Leaf

Cited by 58 publications

References 14 publications

A Framework to Achieve Multifunctionality in Biomimetic Adaptive Building Skins

A Framework to Achieve Multifunctionality in Biomimetic Adaptive Building Skins

The Effects of the Layouts of Vegetation and Wind Flow in an Apartment Housing Complex to Mitigate Outdoor Microclimate Air Temperature

Model Simulation of Soybean (Glycine Max (L.) Merrill) Growth by Energy Balance Approach

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