Research Article
Experimental Study of a Mixed Solar Dryer: Application to Drying Okra
Issue:
Volume 13, Issue 5, October 2025
Pages:
128-135
Received:
16 July 2025
Accepted:
20 August 2025
Published:
11 September 2025
DOI:
10.11648/j.sr.20251305.11
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Abstract: Large-scale agricultural production generally occurs during specific periods of the year. This results in the unavailability of products outside of their production periods. Due to their high water content, most agri-food products deteriorate very quickly under the effect of heat, hence the need to develop preservation techniques. Preservation techniques for fresh produce require energy. Burkina Faso is a country with strong solar potential, which is why solar dryers are the most developed technologies for preserving agri-food products. However, the quality of the dried product depends on the quality of the dryer. Our work focuses on the construction of a mixed solar dryer for drying agricultural products. The flat-plate collector is equipped with baffles that allow for greater heat exchange between the air and the hot parts (absorber and baffles) of the collector. The drying chamber is fitted with double-sloped glazing on the roof. An experimental study of hygrothermal parameters, such as air temperature at the racks, product temperature, product water content, and relative humidity inside the drying chamber, was conducted to determine the dryer's performance. We also determined the effective diffusion coefficient and efficiency. The evolution of solar irradiation was monitored during drying operations. Experiments show that the temperature inside the dryer can reach 80°C to 100°C. The effective diffusion coefficient is approximately 1.89.10-7 m2/s, and the dryer's efficiency is 28.56%.
Abstract: Large-scale agricultural production generally occurs during specific periods of the year. This results in the unavailability of products outside of their production periods. Due to their high water content, most agri-food products deteriorate very quickly under the effect of heat, hence the need to develop preservation techniques. Preservation tech...
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Research Article
Demonetization and Its Determinants in the Financial Markets of Ethiopia: An Economic Policy Analysis
Tadele Melaku Chala*
Issue:
Volume 13, Issue 5, October 2025
Pages:
136-147
Received:
18 July 2025
Accepted:
27 August 2025
Published:
28 October 2025
DOI:
10.11648/j.sr.20251305.12
Downloads:
Views:
Abstract: The main objective of this study is to identify the determinants of implementing demonetization in micro and small-scale enterprises in Ethiopian in case of Addis Ababa city. To achieve this objective, this study employed explanatory research design and data was collected from across the population at one point in time. The researcher used primary sources of data which was collected via questionnaire. The descriptive and econometric data analysis, particularly the logistic regression analysis was used to test the relationship between explanatory and the dependent variables. The researcher selected a sample of 315 respondents using Stratified sampling method, The logistic regression result indicated that management factors, financial factors, political-legal factors, marketing factors, and technological factors have a significant and positive effect on the implementation of demonetization in Lideta sub city of Addis Ababa City. Finally, based on the findings of a study, the researcher suggests that all concerned bodies such as financial institutions, the media, government bodies and Micro and small enterprise owners should work toward expanding the means for to demonetization, since it has functions such as cost and time to save, increase sales volume, boost government tax collection, reduce illegal activities and black money prevalence, encourage technological advancements which contributes for the country’s economic growth as a whole. Creating awareness concerning currency demonetization and encouraging and increasing the usage of demonetization instruments, then the simple way that society is going to use is a digitalization.
Abstract: The main objective of this study is to identify the determinants of implementing demonetization in micro and small-scale enterprises in Ethiopian in case of Addis Ababa city. To achieve this objective, this study employed explanatory research design and data was collected from across the population at one point in time. The researcher used primary ...
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