Performance and operation mode analysis of a heat recovery and thermal storage solar-assisted heat pump drying system

Qiu, Yu; Li, Ming; Hassanien, Reda Hassanien Emam; Wang, Yun Feng; Luo, Xianwu

doi:10.1016/j.solener.2016.08.016

Cited by 83 publications

(27 citation statements)

References 20 publications

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“…Agreement with the results found in the literature was rather satisfactory, where the average values were 0.98 kg/kWh (Liu et al, 2018) and 4.55 MJ/kg (Zlatanovi c et al, 2017). Furthermore, the COP of SAHPD with recovery system giving 2.91, which was lower than that of the SAHPD (Qiu et al, 2016) about 12% because of different products and the higher drying temperature generated by the combination of the heat pump and the solar collector.…”

Section: Comparison Of Sahpd With Recovery System and Open Sunsupporting

confidence: 86%

“…The dried chili peppers are then stored in containers (Hage, Herez, Ramadan, & Bazzi, ). There are various drying methods used including mechanical (Daghigh, Ruslan, Sulaiman, & Sopian, ; Fatouh, Metwally, Helali, & Shedid, ; Qiu et al, ; Zlatanović, Komatina, & Antonijević, ), electrical (Nimrothama, Songprakorpa, Thepaa, & Monyakul, ), infrared (Aktas, Sevik, Amini, & Khanlari, ), dielectric (Jiang, Zhang, Fang, Mujumdar, & Xu, ) and solar (Janjai, Intawee, Kaewkiew, Sritus, & Khamvongsa, ; Kouchakzadeh, ; Prakash & Kumar, ; Sekyere, Forson, & Adam, ; Zarezade & Mostafaeipour, ). Solar energy remains the most popular drying method because of the free energy source (Janjai & Bala, ).…”

Section: Introductionmentioning

confidence: 99%

“…In the case of dryer‐heat pump integration, it was utilized in the vacuum drying system because the drying technique could provide a high drying rate, low drying temperature and an oxygen deficient drying environment (Artnaseaw, Theerakulpisut, & Benjapiyaporn, ). Thereafter, Qiu et al () showed that heat recovery and thermal storage for SAHPD was able to reduce the energy consumption for drying radishes, peppers and mushrooms by 40.53%. Recently, Zlatanović et al () presented experimental results for the convective drying of apples, potatoes, and bananas using a heat pump drying system with full air recirculation.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of solar‐assisted heat pump dryer with heat recovery for the drying of chili peppers

Naemsai

Jareanjit

Thongkaew

2019

J Food Process Engineering

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This research investigated the performance of a solar‐assisted heat pump dryer (SAHPD) with heat recovery to reduce the amount of thermal energy needed for drying chili peppers. The dryer selected for the experimental study consisted of a heat pump, a greenhouse cover and multi trays. It was found that the SAHPD with recovery gave better drying performance than a traditional dying method. The dryer system can offer drying time, drying efficiency, coefficient of performance and specific energy consumption of approximately 24 hr, 33.2%, 3.17, and 2.21 kWh/kg, respectively. Furthermore, the SAHPD with heat recovery provided a higher drying performance than without the heat recovery although the ambient condition changed. Base on the economic analysis, the payback period and net present value of the SAHPD with heat recovery were approximately 1.9 years and 915.60 USD. The SAHPD with two drying rooms also yielded better drying performance than the SAHPD with one room. Practical applications Drying is the process of moisture reduction to a safe limit of moisture content, which allows agriculture to extend the shelf life of the crops by restraining the growth of microorganism. In chili peppers drying process, a solar assisted heat pump drying as one of hybrid solar dryers is preferred because heat and mass transfer rate are rather high and it offers the ability to operate both daytime and nighttime. However, the exhausted air to the ambient still has considerable thermal energy. Thus, the heat recovery system has been employed to design and fabricate inside the dryer. Findings of this research contribute to the evaluation of heat recovery in a typical solar assisted heat pump dryer in terms of drying efficiency and economic feasibility in order to be a guideline for small and medium‐sized enterprises.

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Section: Comparison Of Sahpd With Recovery System and Open Sunsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of solar‐assisted heat pump dryer with heat recovery for the drying of chili peppers

Naemsai

Jareanjit

Thongkaew

2019

J Food Process Engineering

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“…Some of the best results in terms of efficiency have been reported with devices that use blowers to induce a flow from the heating plate in the collector to the chamber where the products are dried [18][19][20][21][22][23]. Also, the drying time has been reduced by the addition of heat storage systems which allow continuing the drying process during the night [24,25]. In other cases, some devices were coupled with additional heat sources, such as burners or electric heaters which were powered by photovoltaic or connected to the grid where available [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Improved Agricultural Products Drying Through a Novel Double Collector Solar Device

et al. 2019

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Backyard agricultural systems are frequently used for food production in rural tropical regions all over the world. The implementation of these systems has been used as a strategy to increase food security, to preserve the phyto and zoo diversity and to provide an alternative income for poorer rural families. Nevertheless, the absence of appropriate preservation mechanisms and nonrenewable energies can lead to significant production losses that could be prevented by the implementation of solar drying devices. The objective of this project was to design, build and validate a double collector solar device for improved drying performance. To evaluate the double collector solar device, four backyard products frequently used in the Mexico Southwest regional diet were used: carrots, chayote squash, tomatoes, and oyster mushrooms. The results showed that the solar device achieved drying efficiencies between 22.8 and 37.9% by reaching moisture values below the 12.30% threshold, which according to the international standards is considered as “Low Moisture Food”. The evaluation of the double collector solar drier is demonstrated to be an easy-to-apply and environmentally friendly method for food preservation in tropical rural regions by taking advantage of domestic renewable energy resources.

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“…Due to the flexibility of structure, by coupling with different terminal devices, heat pump can fulfill different practical demands, such as air conditioning, water heating, and dehumidification [4][5][6][7]. Meanwhile, as heat pump could recover heat from a variety of energy sources, integrating heat pump with renewable energy can bring great energy and cost saving [8,9].…”

Section: Introductionmentioning

confidence: 99%

Operation characteristics of a novel dual source multi-functional heat pump system under various working modes

Wang

Huang

2017

Applied Energy

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Performance and operation mode analysis of a heat recovery and thermal storage solar-assisted heat pump drying system

Cited by 83 publications

References 20 publications

Experimental investigation of solar‐assisted heat pump dryer with heat recovery for the drying of chili peppers

Experimental investigation of solar‐assisted heat pump dryer with heat recovery for the drying of chili peppers

Improved Agricultural Products Drying Through a Novel Double Collector Solar Device

Operation characteristics of a novel dual source multi-functional heat pump system under various working modes

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