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

Haolu Liu, Khurram Yousaf, Kunjie Chen, Rui Fan, Jiaxin Liu and Shakeel Ahmed Soomro
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Haolu Liu: College of Engineering, Nanjing Agricultural University, Nanjing 210031, Jiangsu, China
Khurram Yousaf: College of Engineering, Nanjing Agricultural University, Nanjing 210031, Jiangsu, China
Kunjie Chen: College of Engineering, Nanjing Agricultural University, Nanjing 210031, Jiangsu, China
Rui Fan: College of Engineering, Nanjing Agricultural University, Nanjing 210031, Jiangsu, China
Jiaxin Liu: College of Engineering, Nanjing Agricultural University, Nanjing 210031, Jiangsu, China
Shakeel Ahmed Soomro: College of Engineering, Nanjing Agricultural University, Nanjing 210031, Jiangsu, China

Sustainability, 2018, vol. 10, issue 9, 1-17

Abstract: 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.

Keywords: heat pump dryer; ambient temperature and humidity; specific moisture extraction rate; moisture extraction rate (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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