A novel hybrid desiccant-based ejector cooling system for energy and carbon saving in hot and humid climates. (May 2019)

• Record Type: Journal Article
• Authors: Heidari, Amirreza; Rostamzadeh, Hadi; Avami, Akram
• Is Part Of: International journal of refrigeration. Volume 101(2019)
• Page Start: 196
• Page End: 210
• Publication Date: 2019-05
• Subjects: Solid desiccant -- Ejector cycle -- Evaporative cooling -- Energy saving; Déshydratant solide -- Cycle à éjecteur -- Refroidissement évaporatif -- Économie d'énergie -- FRANCAIS; Refrigeration and refrigerating machinery -- Periodicals; 621.56
• DOI: 10.1016/j.ijrefrig.2019.03.028
• Languages: English
• ISSNs: 0140-7007

Abstract

Highlights: The integration of ejector cooling cycle and desiccant-based cooling cycle is proposed. The main characteristic of them is that they are driven thermally. This system is capable to provide comfort conditions in subtropical humid climate. The performance is compared with conventional systems. Abstract: Desiccant-based evaporative cooling systems are considered as an energy efficient alternative to conventional vapor compression systems in humid climates. A novel hybrid desiccant-based ejector cooling (hybrid DEC) system is here presented to utilize low grade heat. In order to evaluate the system performance under subtropical humid climates, a dynamic hourly simulation of the system is performed for a typical building in Sydney. The results indicate that the hybrid DEC system is able to provide comfort conditions in subtropical and humid climates. Hybrid DEC system has a significant higher coefficient of performance compared to the conventional vapor compression system resulting to 84% electricity savings and 10.2% natural gas savings during the summer season, which results to 41% reduction in CO2 emissions. Therefore, these results demonstrate that there is a good potential in combining ejector cooling cycle and desiccant-based evaporative cooling cycle for energy and carbon savings.