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Performance analysis of heat pump and infrared-heat pump drying of grated carrot using energy-exergy methodology

机译：能量-能量学方法对胡萝卜磨碎的热泵和红外热泵干燥性能分析

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In this study, a hybrid drying system that combines all of the advantages of different drying methods was developed. This study aims to compare experimental results of a heat pump dryer (HPD) and an infrared assisted heat pump dryer (IRAHPD), to determine the energy and exergy efficiency of dryers and to analyze the drying kinetic of grated carrot for observing the effectiveness of the dryers. Samples were dried at 45 degrees C and 50 degrees C set temperatures and 0.5 m/s air velocity. According to dry basis calculation, initial moisture content amount was 7.06 g water/g dry matter and amount of final moisture content of dry matter was obtained as 0.14 g water/g dry matter. Energy efficiency varied between 5.3% and 50%. Minimum and maximum coefficients of performance for the whole system (COPws) were 2.11 and 2.96 respectively. Maximum exergy efficiency was obtained 66.8% while minimum exergy efficiency was 31.6%. It was concluded that during the time to reach a stable state of system, the exergy efficiency increased in response to exergy loss decreases. This study shows a successful and efficient combination of heat pump and infrared heater in food drying, (C) 2016 Elsevier Ltd. All rights reserved.
机译：在这项研究中，开发了一种混合干燥系统，该系统结合了不同干燥方法的所有优点。这项研究旨在比较热泵干燥机（HPD）和红外辅助热泵干燥机（IRAHPD）的实验结果，确定干燥机的能量和火用效率，并分析磨碎的胡萝卜的干燥动力学，以观察干燥机的有效性。烘干机。将样品在45摄氏度和50摄氏度的设定温度和0.5 m / s的空气速度下干燥。根据干基计算，初始水分含量为7.06g水/ g干物质，并且获得的干燥物质的最终水分含量为0.14g水/ g干物质。能源效率介于5.3％和50％之间。整个系统的最小和最大性能系数（COPws）分别为2.11和2.96。获得最大的火用效率为66.8％，而最小的火用效率为31.6％。结论是，在达到系统的稳定状态期间，响应于（火用）损失的减少，其（火用）效率增加。这项研究显示了热泵和红外加热器在食品干燥中的成功和有效组合，（C）2016 Elsevier Ltd.保留所有权利。

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