Experimental Investigation of Desiccant Dehumidification Cooling System for Climatic Conditions of Multan (Pakistan)

Energies

MuhammadI. Sabir¹  Muhammad Aleem²  ZahidM. Khan²  Ghulam Hussain²  Faizan Shabir²  MuhammadH. Mahmood²  Muhammad Sultan²  Abdul Nasir³  Takahiko Miyazaki⁴ 

[1] Agricultural Mechanization Research Institute (AMRI), Old Shujabad Road, Multan 60800, Pakistan;Department of Agricultural Engineering, Bahauddin Zakariya University, Multan 60800, Pakistan;Department of Structures and Environmental Engineering, Faculty of Agricultural Engineering & Technology, University of Agriculture, Faisalabad 38000, Pakistan;Faculty of Engineering Sciences, Kyushu University, Kasuga-koen 6-1, Kasuga-shi, Fukuoka 816-8580, Japan;

关键词: desiccant dehumidification;    silica gel;    polymer;    air-conditioning;    Maisotsenko cycle;    performance evaluation;   

DOI  :  10.3390/en13215530

来源: DOAJ

【 摘 要 】

In this study, experimental apparatus of desiccant dehumidification was developed at lab-scale, using silica gel as a desiccant material. Experimental data were obtained at various ambient air conditions, while focusing the climatic conditions of Multan (Pakistan). A steady-state analysis approach for the desiccant dehumidification process was used, and thereby the slope of desiccant dehumidification line on psychrometric chart (ϕ*) was determined. It has been found that ϕ* = 0.22 in case of silica gel which is lower than the hydrophilic polymeric sorbent, i.e., ϕ* = 0.31. The study proposed two kinds of systems, i.e., (i) standalone desiccant air-conditioning (DAC) and (ii) Maisotsenko-cycle-assisted desiccant air-conditioning (M-DAC) systems. In addition, two kinds of desiccant material (i.e., silica gel and hydrophilic polymeric sorbent) were investigated from the thermodynamic point of view for both system types, using the experimental data and associated results. The study aimed to determine the optimum air-conditioning (AC) system type, as well as adsorbent material for building AC application. In this regard, perspectives of dehumidification capacity, cooling capacity, and thermal coefficient of performance (COP) are taken into consideration. According to the results, hydrophilic polymeric sorbent gave a higher performance, as compared to silica gel. In case of both systems, the performance was improved with the addition of Maisotsenko cycle evaporative cooling unit. The maximum thermal COP was achieved by using a polymer-based M-DAC system, i.e., 0.47 at 70 °C regeneration temperature.

【 授权许可】

Unknown