A parametric analysis on the regeneration performance of silica gel in a proposed comfort provision strategy for a typical office space in Harare, Zimbabwe

Manyumbu, E.; Martin, Viktoria; Fransson, Torsten

doi:10.1016/j.enbuild.2016.05.027

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…where 𝑚̇𝑤 is the moisture transfer rate from the solid desiccant, 𝑚̇𝑎 is the mass flow rate of air, 𝑋 𝑎𝑜 is the specific humidity of air at the outlet and 𝑋 𝑎𝑖 is the specific humidity of air at the inlet. The moisture transfer rate 𝑚̇𝑤 based on the linear driving force (LDF) model is shown in Equation (3) [24]:…”

Section: External Silica Gel Drying Modelmentioning

confidence: 99%

“…The moisture transfer rate . m w based on the linear driving force (LDF) model is shown in Equation (3) [24]:…”

Section: External Silica Gel Drying Modelmentioning

confidence: 99%

“…where X * a is the minimum possible specific humidity of the air at outlet temperature, this is the specific humidity where the air is assumed to have been dried to the point where it comes into equilibrium with desiccant and the desiccant is at its initial moisture content. Expressing X * a in terms of the moisture content [24] and substituting in Equation ( 9) results in Equation (10).…”

Section: Internal Surfaces Regenerationmentioning

confidence: 99%

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Prospective PCM–Desiccant Combination with Solar-Assisted Regeneration for the Indoor Comfort Control of an Office in a Warm and Humid Climate—A Numerical Study

Manyumbu

Martin²,

Chiu³

2023

Energies

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Favorable thermal conditions within buildings are a necessity. Mechanical air conditioning, although effective, contributes a significant percentage of the world’s total energy use, which contributes to global warming. In addition, the refrigerants used in air conditioning also contribute to global warming. Passive means to provide thermal comfort have therefore been considered as alternative solutions. Phase-change materials (PCMs) have been considered as one passive cooling option. Although this option achieves a certain degree of effectiveness, especially in warm and dry climatic conditions, its effectiveness in warm humid climates is subdued due to its inability to handle humidity. In the present study, the suitability of a novel passive comfort provision strategy that combines a PCM and a desiccant is assessed. The passive system operates in a cycle of two phases: the moderating phase and the regenerating phase. For the proposed strategy, the regeneration process first involves the external desiccant bed, then night air drying using the regenerated external bed; the dried air subsequently regenerates the internal wall surface. The study involves the modeling of the proposed strategy and simulation of its performance. The simulation results indicate the significant potential for providing satisfactory comfort and health conditions through application of a combination of a desiccant and a PCM.

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Section: External Silica Gel Drying Modelmentioning

confidence: 99%

“…The moisture transfer rate . m w based on the linear driving force (LDF) model is shown in Equation (3) [24]:…”

Section: External Silica Gel Drying Modelmentioning

confidence: 99%

Section: Internal Surfaces Regenerationmentioning

confidence: 99%

See 1 more Smart Citation

Prospective PCM–Desiccant Combination with Solar-Assisted Regeneration for the Indoor Comfort Control of an Office in a Warm and Humid Climate—A Numerical Study

Manyumbu

Martin²,

Chiu³

2023

Energies

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Passive Solar Systems for the Promotion of Thermal Comfort in African Countries: A Review

2022

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Globally, the residential sector consumes a significant amount of energy. Therefore, bioclimatic architectural systems which consider passive solutions should be studied, analyzed, and implemented to reduce energy consumption. This review aims to promote thermal comfort in African countries by using passive solar systems. It begins with the keyword thermal comfort and then reviews articles published over the last ten years that consider bioclimatic architecture and construction strategies in Africa, the main trends in scientific research in this field, and the possibilities for each climate zone in achieving the highest degree of climate comfort. Following an extensive review, certain bioclimatic architectural strategies adopted in specific countries can be applied in countries with similar climates and this can contribute to significant energy savings through effective functional solar and ventilation design strategies. Several countries have been identified as having the most significant publications on thermal regulations in buildings, and the associated regulations and projects are discussed. Several studies have also examined static and adaptive models of thermal comfort.

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A parametric analysis on the regeneration performance of silica gel in a proposed comfort provision strategy for a typical office space in Harare, Zimbabwe

Cited by 2 publications

References 9 publications

Prospective PCM–Desiccant Combination with Solar-Assisted Regeneration for the Indoor Comfort Control of an Office in a Warm and Humid Climate—A Numerical Study

Prospective PCM–Desiccant Combination with Solar-Assisted Regeneration for the Indoor Comfort Control of an Office in a Warm and Humid Climate—A Numerical Study

Passive Solar Systems for the Promotion of Thermal Comfort in African Countries: A Review

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