Comparative performance of a solar assisted heat pump dryer with a heat pump dryer for Curcuma

Hasibuan, Rosdanelli; Yahya, Muhammad; Fahmi, Hendriwan; Edison, Edison

doi:10.11591/ijpeds.v11.i3.pp1617-1627

Cited by 6 publications

(9 citation statements)

References 21 publications

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“…Drying rate is the ratio of moisture evaporated from the product over time. The drying rate of the products was estimated using eq according to Hasibuan, Yahya, Fahmi, and Edison DR = normalM normalw t where M w = total mass of water evaporated from the drying products (kg), and t = drying time (h).…”

Section: Methodsmentioning

confidence: 99%

Development and Performance Evaluation of a Novel Solar Dryer Integrated with Thermal Energy Storage System for Drying of Agricultural Products

Rulazi,

Marwa,

Kichonge

et al. 2023

ACS Omega

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Passive solar dryers play a crucial role in reducing postharvest losses in fruits and vegetables, especially in regions like sub-Saharan Africa with low electrification rates and limited financial resources. However, the intermittent nature of solar energy presents a significant challenge for these dryers. Passive solar dryers integrated with thermal energy storage (TES) can reduce intermittence and improve the drying efficiency. Currently, phase change materials (PCMs) are popular heat storage materials in dryers, and paraffin wax dominates. The main problem with the use of PCMs is that it is necessary to closely constrain the temperature range of the process during charging and discharging. This can be a difficult condition to meet in simple solar dryers due to the variable availability of solar radiation. Instead, solid-phase materials, such as sand and rocks, are often used. Soapstone is one of the natural rocks with good thermal properties, but it has yet to be used as a TES material in solar dryers for drying agricultural products. Therefore, the main objective of the present study was to develop a novel solar dryer integrated with soapstone as a TES material and evaluate its performance. The proximate analysis to examine the quality of dried products using the developed technology was also carried out. The comparative experiments for the developed dryer were conducted in two modes: dryer with TES materials and without TES materials, and the results were compared with open sun drying (OSD) by drying 50 kg of fresh pineapple and carrot at different times. The drying times for pineapples in the dryer with TES, without TES, and OSD were 13, 24, and 52 h, respectively. However, the drying times for carrots in the dryer with TES, without TES, and OSD were 12, 23, and 50 h, respectively. Notably, the dryer integrated with TES materials could supply heat for around 3–4 h after sunset. The thermal efficiency of the dryer, collector efficiency, and storage efficiency of TES materials were calculated and found to be 45, 43, and 74.5%, respectively. Proximate analysis indicated that the dryer integrated with TES materials effectively maintained the quality of the dried products compared to OSD. Solar dryer integrated with soapstone showed great promise as sustainable and efficient solutions for reducing postharvest losses and enhancing food security in resource-constrained regions like sub-Saharan Africa.

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Section: Methodsmentioning

confidence: 99%

Development and Performance Evaluation of a Novel Solar Dryer Integrated with Thermal Energy Storage System for Drying of Agricultural Products

Rulazi,

Marwa,

Kichonge

et al. 2023

ACS Omega

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“…The thermal efficiency of the drying system was determined by using Equation 9, according to Hasibuan et al (2020).…”

Section: Instrumentmentioning

confidence: 99%

Techno‐economic analysis of a solar‐assisted heat pump dryer for drying agricultural products

Rulazi,

Marwa,

Kichonge

et al. 2023

Food Science & Nutrition

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Postharvest losses (PHLs) of biomaterials, such as vegetables and fruits, significantly impact food security and economic stability in developing nations. In Tanzania, PHLs are estimated to range between 30% and 40% for cereal crops and even higher for perishable crops such as fruits and vegetables. Open‐sun drying (OSD) is the most extensively employed method because of its affordability and simplicity. However, OSD has several drawbacks, including difficulties in managing drying parameters, long drying times owing to adverse weather, and product contamination. The solar‐assisted heat pump dryer (SAHPD) is a technology designed as an alternative solution for drying biomaterials and reducing PHL. A limited number of SAHPDs have been constructed in developing nations. Most of the works have concentrated on the performance analysis of the systems. This neglects the techno‐economic assessment, which is important to provide both a quantitative and qualitative understanding of the financial viability of the technology. The present study therefore investigates the techno‐economic analysis of a novel SAHPD for drying agricultural products, particularly vegetables and fruits. To determine whether the SAHPD technology is technically and economically viable, tomatoes and carrots were dried and analyzed to determine their thermal and economic performance. The results show that the initial moisture contents of tomatoes (Lycopersicum esculentum) and carrots (Daucus carota) were reduced from 93% and 88% to 10% in 11 and 12 h, respectively. The coefficient of performance (COP), drying time (DT), specific moisture extraction ration (SMER) and thermal efficiency () were found to be 3.4, 2.3 kg/h, 1.33 kg/kWh and 54.0%, respectively. The economic analysis was assessed using the annualized cost, lifecycle savings, and payback period for the dryer's life span of 15 years. The initial investment of the SAHPD was $5221.8 and the annualized cost was $1076.5. The cumulative present worth for 15 years was found to be $23,828.8 and $27,553.1 for tomatoes and carrots, respectively. The payback period for tomatoes was found to be 3 years, whereas for carrots it was 2.6 years. Based on thermal and economic performance assessment results, the developed SAHPD is technically and economically viable to be considered for further investments.

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“…The efficiency of collector, the effectiveness of heat exchanger, the moisture content (wb), the moisture evaporation rate (MER), the specific moisture evaporation rate (SMER), the energy required for evaporation of moisture (Q ev ), the total energy input to dryer (Q in ), and the dryer efficiency were determined by using equaitions in Table 3 [21], [26], [28], [29], [35], [36], [45]. The obtained data for performance analysis during drying of Centella asiatica L in two day drying experiments are presented in Table 4…”

Section: Experimental Data Analysismentioning

confidence: 99%

“…Several researchers have integrated and tested solar dryers with heat pump using air and water based solar collectors for drying various of types the medicinal hebrs and heat sensitive products, for using air based solar collectors such as: curcuma [26], tomato [27], banana [28], mint leaves [29], tomato, strawberry, mint, and parsley [30], agricultural food grains [31], and corn [32]. For using water based solar collectors such as: wheat [33], banana chip [34], radish [35], and mushroom [36].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the performance of a solar dryer integrated with solid desiccant coloums using water based solar collector for medicinal herb

Yahya

Hasibuan

Sundari

et al. 2021

IJPEDS

Self Cite

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This study is concerned with the analyses of performance on a solar dryer integrated with solid desiccant coloums using water based solar collector. The dryer consists of a solar water collector, two solid desiccant coloums, a water storage tank, two heat exchangers, an air heater, and a drying chamber. The dryer decreased the <em>Centella asiatica</em> L moisture content from 88.3% (wb) to 15.9% (wb) within 12 hours, with an average temperature and relative humidity of 45.4°C and 25.8%, respectively. The rate of moisture evaporation and the specific moisture evaporation rate were in the range of 0.001-1.762kg/h and 0.02-0.482 kg/kWh, with 0.594kg/h and 0.169kg/kWh in average values, respectively. The dryer efficiency was in the range of 0.62%-30.4%, with 15.4% in average value. The energy required for moisture evaporation and total energy input to the dryer were in the range of 26.9-1132.2W and 3638.0-4329.7W, with 601.8 W and 3967.4 W in average values, respectively. The efficiency of collector and the heat exchanger effectiveness were in the range of 38.1-50.5% and 65.1-79.7%, with 45.0% and 73.0% in average values, respectively. The result shows that the dryer is suitable for drying <em>Centella asiatica </em>L, this is due to the low temperature of drying air and high moisture evaporation rate.

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Comparative performance of a solar assisted heat pump dryer with a heat pump dryer for Curcuma

Cited by 6 publications

References 21 publications

Development and Performance Evaluation of a Novel Solar Dryer Integrated with Thermal Energy Storage System for Drying of Agricultural Products

Development and Performance Evaluation of a Novel Solar Dryer Integrated with Thermal Energy Storage System for Drying of Agricultural Products

Techno‐economic analysis of a solar‐assisted heat pump dryer for drying agricultural products

Experimental investigation of the performance of a solar dryer integrated with solid desiccant coloums using water based solar collector for medicinal herb

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