Numerical Analysis and Optimization of Solar-Assited Heat Pump Drying System with Waste Heat Recovery Based on TRNSYS

Xie, Zhiyuan; Gong, Yun; Ye, Cantao; Yao, Yuan; Liu, Yubin

doi:10.3390/pr9071118

Cited by 9 publications

(3 citation statements)

References 21 publications

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“…The payback period in this study is less as compared to the 5 years reported by Xie et al. ( 2021 ) for SAHPD with waste heat recovery. The difference could be due to less quantity of the annually dried products in the dryer, in which it was reported 45.99 kg compared to 1,200 kg of dried carrots, hence making less annual savings.…”

Section: Resultscontrasting

confidence: 54%

“…The obtained payback periods are in the range of 1.6-3.6 years for most of the SAHPD, as reported by Loemba et al (2022) when conducting a comprehensive assessment of heat pump dryers for agricultural products. The payback period in this study is less as compared to the 5 years reported by Xie et al (2021) for SAHPD with waste heat recovery. The difference could be due to less quantity of the annually dried products in the dryer, in which it was reported 45.99 kg compared to 1,200 kg of dried carrots, hence making less annual savings.…”

Section: Payback Periodmentioning

confidence: 69%

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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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Section: Resultscontrasting

confidence: 54%

Section: Payback Periodmentioning

confidence: 69%

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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“…For multi-heat source complementary technology, many researchers have carried out systematic studies through TRNSYS simulation. For example, Xie et al [8] established a new waste heat recovery dual-tank solar heat pump drying system and optimized the system through TRNSYS and variable air volume experiments. The results showed that the mixed variable air volume model could improve the drying rate and shorten the drying cycle by 28.6-33.3% with less energy loss.…”

Section: Introductionmentioning

confidence: 99%

Research on Operation Performance of Multi-heat Source Complementary System of Combined Drying Based on TRNSYS

Ma¹,

Xu²,

Liu³

et al.

Proceedings of the 22nd International Drying Symposium on Drying Technology - IDS '22

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In this paper, a multi-heat source complementary system of combined drying was designed, which used three heat sources, solar energy, heat pump, and combustion furnace, with two drying technologies, hot air drying and vacuum drying. The simulation model of the multi-heat source complementary system of combined drying was established based on TRNSYS. Using the meteorological parameters of Xi'an as input, and the correctness of the model was verified by a comparison of experiments and simulations. The overall error is between 2.0% and 13.3%. The model was used to predict the performance parameters, operating energy consumption, and operating costs of the system. The results show that the operating energy consumption of the system is affected by season, with solar energy and heat pumps being more significant. The annual operating cost of the multi-source complementary heating mode is reduced by 0.68%~42.6% compared with other heating modes, and its carbon emission is reduced by 2.5%~33.1% compared with other heating modes, thus reducing energy consumption and cost.

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Exploring Mathematical Modeling and CFD in Convective Drying of Fruits and Vegetables: A Review

Arpaci,

Atayılmaz,

Gemici

2024

Food Bioprocess Technol

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Numerical Analysis and Optimization of Solar-Assited Heat Pump Drying System with Waste Heat Recovery Based on TRNSYS

Cited by 9 publications

References 21 publications

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

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

Research on Operation Performance of Multi-heat Source Complementary System of Combined Drying Based on TRNSYS

Exploring Mathematical Modeling and CFD in Convective Drying of Fruits and Vegetables: A Review

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