Development of heat pump and infrared-convective dryer and performance analysis for stale bread drying

Aktaş, Mustafa; Şevik, Seyfi; Aktekeli, Burak

doi:10.1016/j.enconman.2016.01.028

Cited by 47 publications

(15 citation statements)

References 30 publications

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“…The effective moisture diffusivity determined in the thickness steady-state and transient conditions. The analytical solution for single-layer objects and several geometries was explained by Amiri Chayjan (2011), according to Equation (4) [31]:…”

Section: Models Equationmentioning

confidence: 99%

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Parboiled Paddy Drying with Different Dryers: Thermodynamic and Quality Properties, Mathematical Modeling Using ANNs Assessment

Taghinezhad

Szumny

Kaveh

et al. 2020

Foods

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The effect of hybrid infrared-convective (IRC), microwave (MIC) and infrared-convective-microwave (IRCM) drying methods on thermodynamic (drying kinetics, effective moisture diffusivity coefficient (Deff), specific energy consumption (SEC)) and quality (head rice yield (HRY), color value and lightness) characteristics of parboiled rice samples were investigated in this study. Experimental data were fitted into empirical drying models to explain moisture ratio (MR) variations during drying. The Artificial Neural Network (ANN) method was applied to predict MR. The IRCM method provided shorter drying time (reduce percentage = 71%) than IRC (41%) and microwave (69%) methods. The Deff of MIC drying (6.85 × 10−11–4.32 × 10−10 m2/s) was found to be more than the observed in IRC (1.32 × 10−10–1.87 × 10−10 m2/s) and IRCM methods (1.58 × 10−11–2.31 × 10−11 m2/s). SEC decreased during drying. Microwave drying had the lowest SEC (0.457 MJ/kg) compared to other drying methods (with mean 28 MJ/kg). Aghbashlo’s model was found to be the best for MR prediction. According to the ANN results, the highest determination coefficient (R2) values for MR prediction in IRC, IRCM and MIC drying methods were 0.9993, 0.9995 and 0.9990, respectively. The HRY (from 60.2 to 74.07%) and the color value (from 18.08 to 19.63) increased with the drying process severity, thereby decreasing the lightness (from 57.74 to 62.17). The results of this research can be recommended for the selection of the best dryer for parboiled paddy. Best drying conditions in the study is related to the lowest dryer SEC and sample color value and the highest HRY and sample lightness.

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Section: Models Equationmentioning

confidence: 99%

“…This dryer uses different sources of energy including thermal energy (infrared lamps, heaters) and mechanical energy (blowers). Thermal energy was determined using Equation (7) [31]:…”

Section: Irc Dryingmentioning

confidence: 99%

Parboiled Paddy Drying with Different Dryers: Thermodynamic and Quality Properties, Mathematical Modeling Using ANNs Assessment

Taghinezhad

Szumny

Kaveh

et al. 2020

Foods

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“…The hybrid IRHA technique accelerates the drying process, increases product quality and improves drying efficiency [5]. Most agricultural products have been successfully dried using this system including mushroom slices [3], blackberry leaves [6], jujube slices [7], onion slices [8], apple slices [9], peas [10], stale breads [11], and potato slices [12]. Lutovska et al [13] and Zhu and Jiang [14] performed their research on drying of peas and sweet potatoes, respectively.…”

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confidence: 99%

Effect of IR intensity and air temperature on exergy and energy at hybrid infrared-hot air dryer

Jafari

Hashemi

2018

CI&CEQ

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“…There are many types of heat pump drying systems which are used for food or agricultural products drying. Combining other mechanisms with HPD system has been investigated by many researchers which include solar assisted heat pump dryer, air source heat pump dryer, ground source heat pump (GSHP) dryer, heat pump assisted (hybrid) microwave drying, chemical heat pump dryer, and other hybrid HPD systems …”

Section: Introductionmentioning

confidence: 99%

“…Combining other mechanisms with HPD system has been investigated by many researchers which include solar assisted heat pump dryer, [10][11][12][13] air source heat pump dryer, 14,15 ground source heat pump (GSHP) dryer, [16][17][18] heat pump assisted (hybrid) microwave drying, [19][20][21] chemical heat pump dryer, 22 and other hybrid HPD systems. [23][24][25][26][27][28][29] Adapa et al 30 developed a simplified procedure for performance modeling of a low temperature heat pump coupled to a continuous cross flow bed dryer. Both outside heat and mass transfer coefficients at the evaporator and condenser coils have been taken into consideration as critical factors that regulate the transference of energy between the heat pump and dryer unit.…”

Section: Introductionmentioning

confidence: 99%

Thermal performance of a solar‐assisted heat pump drying system with thermal energy storage tank and heat recovery unit

Ismaeel

Yumrutaş

2020

Int J Energy Res

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Summary Thermal performance parameters for a solar‐assisted heat pump (SAHP) drying system with underground thermal energy storage (TES) tank and heat recovery unit (HRU) are investigated in this study. The SAHP drying system is made up of a drying unit, a heat pump, flat plate solar collectors, an underground TES tank, and HRU. An analytical model is developed to obtain the performance parameters of the drying system by using the solution of heat transfer problem around the TES tank and energy expressions for other components of the drying system. These parameters are coefficient of performances for the heat pump (COP) and system (COPs), specific moisture evaporation rate (SMER), temperature of water in the TES tank, and energy fractions for energy charging and extraction from the system. A MATLAB program has been prepared using the expressions for the drying system. The obtained results for COP, COPs, and SMER are 5.55, 5.28, and 9.25, respectively, by using wheat mass flow rate of 100 kg h−1, Carnot efficiency of 40%, collector area of 100 m2, and TES tank volume of 300 m3 when the system attains periodic operation duration in fifth year onwards for 10 years of operation. Annual energy saving is 21.4% in comparison with the same system without using HRU for the same input data.

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Development of heat pump and infrared-convective dryer and performance analysis for stale bread drying

Cited by 47 publications

References 30 publications

Parboiled Paddy Drying with Different Dryers: Thermodynamic and Quality Properties, Mathematical Modeling Using ANNs Assessment

Parboiled Paddy Drying with Different Dryers: Thermodynamic and Quality Properties, Mathematical Modeling Using ANNs Assessment

Effect of IR intensity and air temperature on exergy and energy at hybrid infrared-hot air dryer

Thermal performance of a solar‐assisted heat pump drying system with thermal energy storage tank and heat recovery unit

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