The optimization of radiofrequency assisted heat pump drying of Ganoderma lucidum

Kien, Pham Van; Son, Doan Thanh; Nguyen, Sang Quang

doi:10.1063/5.0066669

Cited by 1 publication

(1 citation statement)

References 16 publications

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“…Furthermore, the drying rate remained unchanged by the drying air velocity and increasing radio frequency power reduced the drying time. Kien et al 62 investigated a radiofrequency‐assisted heat pump dryer to dry Ganoderma lucidum. According to the findings, as the radio frequency power increased and drying air temperature, the drying rate increased, but as the drying air velocity rose, the drying rate decreased.…”

Section: Performance Analysismentioning

confidence: 99%

Comprehensive assessment of heat pump dryers for drying agricultural products

Loemba

Kichonge

Kivevele

2022

Energy Science & Engineering

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Fruits and vegetables are agricultural products that require preservation to enhance and protect shelf life, encapsulate natural flavour, and retain nutritional content. Globally, agricultural products are preserved by a range of means, the most prevalent of which is the heat pump dryer, which produces the best results even in unfavourable climatic conditions. Heat pump dryers come in different types and their performance varies depending on the type. This study aims to evaluate recently developed heat pump dryers based on key performance indicators, impacts on food colour and nutritional content, techno‐economic, exergoeconomic, and environmental issues associated with the development of heat pump dryers, which are underrepresented in most of the existing heat pump dryers' reviews. This study also discusses mathematical drying kinetic models, and regulation or policy aspects related to the development of heat pump dryers. In the present study, the results on performance analysis indicate that heat pump dryers examined were effective in reducing drying time and obtaining high coefficients of performance ranging from 1.94 to 5.338 and specific moisture extraction rate ranging from 0.156 to 9.25 kg/kWh, as well as significantly reducing energy consumption by up to 80%. The nutritional composition and colour results show that heat pump dryers maintain the maximum nutrient content while also improving colour. The expansion valve has the lowest exergoeconomic factor of all heat pump dryer components, whereas the compressor has the highest cost of exergy destruction in general, according to the results of exergoeconomic analysis. Techno‐economic analysis results demonstrated that most developed heat pump dryers have short payback periods ranging from 1.6 to 3.6 years. However, due to a lack of research in this field, the environmental implications of heat pump dryers are unknown. As per the findings of this study, future research in this field should focus on the design of simple and low‐energy heat pump dryers, life cycle, techno‐economic, and exergoeconomic assessments.

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Section: Performance Analysismentioning

confidence: 99%