Investigation of a solar assisted heat pump wheat drying system with underground thermal energy storage tank

Ismaeel, Hatem Hasan; Yumrutaş, Recep

doi:10.1016/j.solener.2020.02.022

Cited by 55 publications

(11 citation statements)

References 31 publications

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“…Solar energy is one of the sources of heat that can be stored. The primary components of the thermal energy storage system are the storage tank and heat storage medium [3][4]. This study used solar energy to store heat and the phase change material (PCM) as the storage medium.…”

Section: Introductionmentioning

confidence: 99%

Designing a Solar Heat Storage System using Heat Pipe and Phase-Change Material (PCM)

Rahim

Remeli

Singh

et al. 2022

ARFMTS

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Phase change material (PCM) is used as a storage medium in a thermal heating system. The PCM's ability to store heat for a long time is suitable for combining with solar energy. PCM can absorb or release large amounts of latent heat at relatively constant temperatures. However, the PCM has poor thermal conductivity. The superconductive heat pipe is suitable to enhance the heat transfer in the PCM. The study aims to prove the concept of a unique thermal storage system that combines solar Fresnel lens, heat pipe, and phase change materials technologies. This study presented a detailed design and testing of the combined system under an actual outdoor environment. Four Fresnel lenses refracted the sunlight and focused on a heat collector. The lenses can be manually adjusted according to the sun's position. The heat is transferred to the PCM storage tank via a finned heat pipe. The testing results showed that the paraffin wax (PCM) has a melting temperature between 54 -59 °C. The highest temperature recorded in the paraffin wax tank was 121 °C which is suitable for many future applications. The system could store the heat up to 730 kJ by using 2 kg of paraffin. During the solidification of PCM (discharging), the system retained 120 kJ of heat for almost 7 hours with minimal heat loss. The system was proven to function well for storing the heat after the sunset, and it can be used for a passive power generation system, such as using thermoelectric cells.

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Section: Introductionmentioning

confidence: 99%

Designing a Solar Heat Storage System using Heat Pipe and Phase-Change Material (PCM)

Rahim

Remeli

Singh

et al. 2022

ARFMTS

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“…Hatem and Yumrutaş [19] created a computer model of a solar-powered heat pump and thermal energy storage (TES) tank used to dry wheat. MATLAB code was developed to simulate the performance metrics over time.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Solar Assisted Heat Pump Drying System with Dual Condensers

Abusaibaa

Sopian

Abdullah

et al. 2022

ARFMTS

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The main components of the dual condenser solar-assisted heat pump (SAHP)drying include the solar collector, evaporator, compressor, fan coil, twin condensers, expansion valve, and drying chamber. The solar drying process was assisted by a heat pump, and the optimal efficiency was determined by heating and dehumidifying the air, and recirculating the air that has been heated. The efficiency of the heat pump system was assessed by its coefficient of performance (COP), which is the percentage of the actual heat delivered by the heat pump to the total electrical power necessary to operate the heat pump. The average temperature of the drying chamber reached a temperature of 60 °C with a relative humidity of around 70%, and the system's COP was 5.546 with no contribution from solar energy or at no solar fraction (SF = 0). The same conditions in the drying chamber can be achieved at solar faction or SF = 0.83, with COP increased to 12.7.

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“…Solar-assisted heat pump drying (SAHPD) is an efficient and economically feasible technique that can reduce the consumption of conventional sources of energy by exploiting the influence of weather and temperature during dehydration (Singh et al , 2020a, b; Hawlader and Jahangeer, 2006). It can also satisfy important demands in industrial drying in terms of product quality control and reducing environmental pollution in drying fruits and vegetables Ismaeel and Yumrutas (2020), Daghigh et al (2010). However, little research has been conducted on using SAHPD to dry slice of pumpkin.…”

Section: Introductionmentioning

confidence: 99%

Modeling and optimization of solar-assisted heat pump drying of pumpkin slice

Deng

2021

BFJ

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PurposeTo reduce energy consumption, the time needed of drying, and the loss of ß-carotene content, and ascorbic acid content, response surface methodology (RSM) was employed for optimization.Design/methodology/approachTo reduce energy consumption, the time needed of drying, and the loss of ß-carotene content, and ascorbic acid content, response surface methodology (RSM) was employed for optimization.FindingsThe results show that the optimum solar-assisted heat pump drying (SAHPD) conditions for drying pumpkin slice were: drying temperature of 67.40 °C, loading density of 1.05 kg/m3, and material thickness of 4 mm. Under these conditions, slice of pumpkin were dried in 440.637 min, where the unit energy consumption, ascorbic acid content, and ß-carotene content were 16.737 kJ/g, 25.682 mg/ (100–g dried sample), and 10.202 mg/g, respectively. The structure of the samples dried using the optimized SAHPD method exhibited a more complete cell morphology than those dried using heat pump drying when examined using scanning electronic microscopy.Originality/valueThis suggests that the optimized SAHPD conditions used in this study are important for production and processing.

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Investigation of a solar assisted heat pump wheat drying system with underground thermal energy storage tank

Cited by 55 publications

References 31 publications

Designing a Solar Heat Storage System using Heat Pipe and Phase-Change Material (PCM)

Designing a Solar Heat Storage System using Heat Pipe and Phase-Change Material (PCM)

Performance Analysis of Solar Assisted Heat Pump Drying System with Dual Condensers

Modeling and optimization of solar-assisted heat pump drying of pumpkin slice

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