Performance Evaluation of a Desiccant Dehumidifier with a Heat Recovery Unit

Kai-Shing Yang, Jian-Sin Wang, Shih-Kuo Wu, Chih-Yung Tseng and Jin-Cherng Shyu
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Kai-Shing Yang: Green Energy and Environment Research Lab., Industrial Technology Research Institute, Hsinchu 31040, Taiwan
Jian-Sin Wang: Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 80778, Taiwan
Shih-Kuo Wu: Green Energy and Environment Research Lab., Industrial Technology Research Institute, Hsinchu 31040, Taiwan
Chih-Yung Tseng: Green Energy and Environment Research Lab., Industrial Technology Research Institute, Hsinchu 31040, Taiwan
Jin-Cherng Shyu: Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 80778, Taiwan

Energies, 2017, vol. 10, issue 12, 1-12

Abstract: In order to effectively increase the drying rate and reduce the energy consumption, a dryer which reduces the air humidity at the dryer inlet using desiccant and regenerates the desiccant by recovering waste heat using a heat pipe heat exchanger was developed in this study. Both the adsorption rate and desorption rate of the dryer were measured at several ambient temperatures ranging from 15 °C to 35 °C, relative humidity levels of air ranging from 20% to 85%, and airflow rates ranging from 30 m 3 /h to 150 m 3 /h. The results showed that the adsorption rate in an environment of high relative humidity of air was 4.89 times higher than that of low relative humidity of air at 15 °C. Moreover, the difference in adsorption rate between two given relative humidity of air increased as the ambient temperature decreased. The specific energy consumption estimated with both energy consumption during desorption and the desorption rate indicated that the energy consumption was 8.27 kJ/g H 2 O without using recovered heat, while the energy consumption was 4.77 kJ/g H 2 O using recovered heat at 130 °C.

Keywords: adsorption; heat pipe heat exchanger; dryer; energy consumption (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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