Investigating Solid and Liquid Desiccant Dehumidification Options for Room Air-Conditioning and Drying Applications

B. Kiran Naik, Mullapudi Joshi, Palanisamy Muthukumar, Muhammad Sultan, Takahiko Miyazaki, Redmond R. Shamshiri and Hadeed Ashraf
Additional contact information
B. Kiran Naik: Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
Mullapudi Joshi: Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
Palanisamy Muthukumar: Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
Muhammad Sultan: Adaptive AgroTech Consultancy Int, 401 Brittany Rd, Seaside, CA 93955, USA
Takahiko Miyazaki: Faculty of Engineering Sciences, Kyushu University, Kasuga-koen 6-1, Kasuga-shi, Fukuoka 816-8580, Japan
Redmond R. Shamshiri: Department of Engineering for Crop Production, Leibniz Institute for Agricultural Engineering and Bioeconomy, 14469 Potsdam-Bornim, Germany
Hadeed Ashraf: Adaptive AgroTech Consultancy Int, 401 Brittany Rd, Seaside, CA 93955, USA

Sustainability, 2020, vol. 12, issue 24, 1-22

Abstract: This study reports on the investigation of the performance of single and two-stage liquid and solid desiccant dehumidification systems and two-stage combined liquid and solid desiccant dehumidification systems with reference to humid climates. The research focus is on a dehumidification system capacity of 25 kW designed for room air conditioning application using the thermal models reported in the literature. RD-type silica gel and LiCl are used as solid and liquid desiccant materials, respectively. In this study, the application of proposed system for deep drying application is also explored. Condensation rate and moisture removal efficiency are chosen as performance parameters for room air conditioning application, whereas air outlet temperature is chosen as performance parameter for deep drying application. Further, for a given range of operating parameters, influences of air inlet humidity ratio, flow rate, and inlet temperature on performance parameters of the systems are investigated. In humid climatic conditions, it has been observed that a two-stage liquid desiccant dehumidification system is more effective for room air conditioning application, and two-stage solid desiccant dehumidification system is more suitable for deep drying application in the temperature range of 50 to 70 °C, while single-stage solid desiccant and two-stage combined liquid and solid desiccant dehumidification systems are more effective for low temperature, i.e., 30 to 50 °C deep drying application.

Keywords: liquid desiccant; solid desiccant; condensation rate; moisture removal efficiency; deep drying; latent heat ratio (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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