Design, Modelling and Experimental Investigation of an Economic Domestic STHW System Using T*Sol® Simulation in Botswana

Seretse, O.M.; Agarwal, Abhishek; Letsatsi, M. T.; Moloko, O.M.; Batlhalefi, M.S.

doi:10.1051/matecconf/201817206004

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…The thermal and exergetic efficiency, as well as the temperature of the solar collector and the drying chamber that the solar dryer managed to have, is viable and efficient to achieve the dehydration of the plants most used in traditional P'urhépecha medicine, by removing more than 80% humidity. For example, Seretse et al, 2019 built a passive solar dryer with temperatures in the drying chamber between 43.6°C and 79.2°C with 4 h of continuous solar radiation at a maximum ambient temperature of 27.5°C. The drying efficiency was 18 to 30% and the exergetic efficiency was 4.5%.…”

Section: Resultsmentioning

confidence: 99%

Use of design thinking in the proposal of a multi-compound solar dryer applied to processes of traditional P'urhépecha Medicine

Núñez-Montiel,

Cira-Ramos,

Corral-Huacuz

et al. 2024

Energy Exploration & Exploitation

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The development of small-scale solar thermal technologies is useful to address specific energy needs; however, there is a gap between the technology that is developed and the one that is accepted and achieves its use in a sustained long-term manner. In this sense, the development of a double-inclination solar dryer for the dehydration of medicinal plants used in traditional P'urhépecha medicine is presented. From a participatory and consensual perspective of technological co-creation with the user that allows promoting its long-term use, the solar dryer was generated from the Design Thinking methodology and the conventional technological development process. The stages of the proposed process considered the identification of the energy need, the design, sizing and simulation, the prototyping, and the characterization and implementation of the technology in a group of traditional doctors for the drying of local medicinal plants. The result is a solar dryer with thermal efficiency of 23% and exergy efficiency of 3%, which achieves the dehydration of medicinal plants in 1 day with 4.7 kWh of average solar irradiance, and removes more than 80% of the humidity from a maximum load of 5 kilograms. The temperature of the drying chamber exceeds 50°C, and the energy distribution is homogeneous, being a natural convection device, easy to build and with affordable materials. This technology has been implemented in the home of a traditional doctor and it is expected that it can be replicated to satisfy the demand for drying products in indigenous community families in Mexico.

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Section: Resultsmentioning

confidence: 99%

Use of design thinking in the proposal of a multi-compound solar dryer applied to processes of traditional P'urhépecha Medicine

Núñez-Montiel,

Cira-Ramos,

Corral-Huacuz

et al. 2024

Energy Exploration & Exploitation

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“…In the quest to advance solar hydrothermal technology, significant contributions have emerged from various studies. Notably, the work of Seretse et al [1] focused on improving heat transfer efficiency from the working fluid to the absorption wall of the pipe. Techniques such as increasing the contact area between the fluid and absorbing pipe or introducing flow obstacles have been investigated to enhance heat transfer rates.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Optimization in Solar Water Heaters: A Comparative CFD Study of Design Configurations

Paul,

Masukume

2023

PEET

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In the realm of renewable energy, the optimization of solar water heating (SWH) systems stands paramount for addressing the escalating energy demands. This investigation delves into the pivotal role of design configurations in augmenting the efficiency of SWH systems, with a focus on diverse climatic and locational contexts. Employing the k-omega turbulence model within the ANSYS software framework, a meticulous evaluation of three distinct design configurations, namely, tube-over-plate, tube-under-plate, and tube-in-line-with-plate, is presented. The essence of this study lies not merely in delineating the intrinsic characteristics of these configurations but in a comparative assessment of their efficiencies to ascertain the most efficacious design for superior SWH performance. The adoption of the k-omega turbulence model is instrumental in capturing the intricate fluid dynamics that significantly influence SWH efficiency. The findings reveal that the tube-under-plate configuration exhibits remarkable efficiency, while the tube-in-line-with-plate arrangement demonstrates comparably effective performance. These insights represent a substantial contribution to the advancement of water heating technology, paving the way for more effective and sustainable energy solutions.

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Optimizing Efficiency of Solar Double-Pass Air Heater through Fluid Combination Approach

Agarwal

2024

E3S Web of Conf.

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The solar air_heater (SAH) is one of the main devices that are used for harnessing solar energy for multipurpose functions. The double-pass solar air_heater (DPSAH) is an advanced model with ducts that transport the air to the two leaves of the loops. This technology is applied where space heating, thermal energy for drying processes, heat pumping applications, etc. are required. This investigation aims to determine the thermal characteristics of an air heater with a double-pass design that works by using CFD simulation. The study is to be carried out by (air flow rate and pressure distribution) measurement within the system. The process relies on the mixture containing both CO2 and O2 as the medium through which the process takes place. The CFD (Computational Fluid Dynamics) analysis results support that CO2 is an efficient working fluid resulting in better heat exchange. This is evident in the fact that supplementary thermal efficiency at the exhaust duct is 1.76% higher than that of air only. Additionally, the mixture of CO2 and air demonstrates increased efficiency with a 15.2% increase in efficiency relative to air alone. It is due to the different specific heat capacities of the gases that the mixture has a higher average specific heat. Therefore, the gas can store more energy, leading to higher thermal efficiency. The outcomes of this experiment demonstrate the possibility of gas combination for the enrichment of the DPSAH efficiency. This research enlightens on thermal energy systems and is an asset in improving the proficiency of solar air heating systems operation.

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Design, Modelling and Experimental Investigation of an Economic Domestic STHW System Using T*Sol® Simulation in Botswana

Cited by 3 publications

References 7 publications

Use of design thinking in the proposal of a multi-compound solar dryer applied to processes of traditional P'urhépecha Medicine

Use of design thinking in the proposal of a multi-compound solar dryer applied to processes of traditional P'urhépecha Medicine

Efficiency Optimization in Solar Water Heaters: A Comparative CFD Study of Design Configurations

Optimizing Efficiency of Solar Double-Pass Air Heater through Fluid Combination Approach

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