Drying heat pumps – Part II: Agro-food, biological and wood products

Minea, Vasile

doi:10.1016/j.ijrefrig.2012.11.026

Cited by 36 publications

(14 citation statements)

References 31 publications

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“…The Dehumidification Quantity Electric Energy Consumption total (2) where SMER is measured in kg/(kWh). For HPD evaluation, in addition to considering energy consumption, the efficiency of the drying process is also an important indicator.…”

Section: Smer =mentioning

confidence: 99%

“…Food drying is an important part of production. There are significant drawbacks to the traditional way in which heat for drying is gained by burning fuel: it consumes a large amount of energy and it causes serious environmental problems, such as haze problems in China [1][2][3][4]. A heat pump is a device that converts medium-low temperature heat energy into medium-high temperature heat energy.…”

Section: Introductionmentioning

confidence: 99%

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Design and Thermal Analysis of an Air Source Heat Pump Dryer for Food Drying

et al. 2018

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In this study, an experimental heat pump dryer was designed. The specific moisture extraction rate and moisture extraction rate were used as performance indicators to explore the influence of environmental factors and the style of the hot air cycle on heat pump drying. The average temperature and humidity in Nanjing’s summer, winter, and throughout the whole year were taken as the experimental ambient temperature and humidity. Garlic slices 3 mm thick, with an initial moisture content of 66.714% w.b., were dried until the end moisture content was 10% w.b. Experimental results and thermal analysis showed that the open and semi-open heat pump dryers were greatly affected by ambient temperature and humidity. The closed heat pump drying system was greatly affected by the bypass air rate.

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Section: Smer =mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and Thermal Analysis of an Air Source Heat Pump Dryer for Food Drying

et al. 2018

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“…Heat pump (HP) drying can improve energy efficiency and independently control the drying temperature and air humidity (Minea, 2013;Yang et al, 2013;Zielinska et al, 2013;Artnaseaw et al, 2010), which is especially suitable for temperature sensitive vegetables and fruits as drying can occur at low temperature (Fan et al, 2014;Hossain et al, 2013;Hii et al, 2012). However, heat pump drying is a rather slow drying process.…”

Section: Introductionmentioning

confidence: 99%

Drying characteristics of Chinese Yam ( Dioscorea opposita Thunb .) by far-infrared radiation and heat pump

Song

Zhang

2018

Journal of the Saudi Society of Agricultural Sciences

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Chinese Yam chips were dried using a heat pump (HP) dryer alone or in combination with far infrared radiation (FIR) at 500, 1000 and 2000 W (500 FIR, 1000 FIR, and 2000. The experimental results were presented in terms of the drying characteristics, and dried product qualities (shrinkage, color, texture, percentage of rehydration, and moisture content). Samples with initial moisture content of approximately 76% (w.b.) were dried to a final moisture content of <17% (w.b.) at the drying temperature of 50°C and at an air flow rate of 1.0 m s À1 for all of the experiments. The data showed that FIR + HP drying increased the drying rate by reducing the drying time, and the resulted dried Chinese Yam chips generally had higher values of lightness and comparable values of redness and yellowness than the HP-treated samples. In the case of HP + 1000FIR, the dried Chinese Yam chips had lower shrinkage, improved rehydration ability, lower hardness and higher brittleness than those dried by HP, HP + 500FIR and HP + 2000FIR. It is worth noting that the total energy used for FIR-assisted drying processes decreased with the increase of FIR intensity. The present data suggest that HP + FIR drying is an effective and economical method for Chinese Yam chip drying, and HP + 1000FIR can obtain the best dried product. Ó 2016 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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“…Thus, the results provide insights into the performance of the dehumidifier dryer in industry while under the control of the timber processing firm. The importance of this research theme has been emphasized previously by Minea [21] and by Mujumdar and Huang. [22] In preparing this report, the authors have endeavored to address Minea's concern [21] that few heat pump dryer studies provide sufficiently detailed information about the measured data presented and the methods used.…”

Section: Introductionmentioning

confidence: 85%

Operational Performance of a Batch-Mode Dehumidifier Timber Dryer

Burnett¹,

Carrington

Scharpf³

et al. 2015

Drying Technology

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This article reviews the operational performance of a batch-mode dehumidifier timber dryer from a range of perspectives, covering a period of 10 years. The drying rate, energy efficiency, and dehumidifier operating environment are analyzed for an illustrative drying run and for a series of 111 runs. Factors affecting the energy consumption and the productivity of the dryer are assessed. The success of the equipment, the system design, and the methods used for control, air-flow reversal, and heat rejection are discussed. Recommendations arising from the authors' experiences with the dryer are presented.

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Drying heat pumps – Part II: Agro-food, biological and wood products

Cited by 36 publications

References 31 publications

Design and Thermal Analysis of an Air Source Heat Pump Dryer for Food Drying

Design and Thermal Analysis of an Air Source Heat Pump Dryer for Food Drying

Drying characteristics of Chinese Yam ( Dioscorea opposita Thunb .) by far-infrared radiation and heat pump

Operational Performance of a Batch-Mode Dehumidifier Timber Dryer

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