Second law analysis of indirect and direct fired single effect absorption systems. (2021)

• Record Type: Journal Article
• Authors: Azhar, Md; Meraj, Md.; Rasheed Ahmed, Adeel Malik; Mohammed Fayyaz, Mohammed Waqqas; Nadeem Ahmed, Mughees Anjum; Aameen Mohiyuddin, Mohd; Md Ishaque, Md Salik
• Is Part Of: Materials today. Volume 38(2021)Supplement Part 1
• Page Start: 378
• Page End: 383
• Publication Date: 2021
• Subjects: Direct fired -- Indirect fired -- Single effect -- Vapour absorption system -- Exergy analysis; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2020.07.508
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: In the present communication, indirect and direct fired single effect vapour absorption refrigeration systems are simulated using lithium bromide-water as the working fluids. First and second Law analyses have been carried out for different operating conditions. The evaporator temperature varies from 5 to 15 °C, while the condenser temperature from 25 to 35 °C in step of 5 °C. Both coefficient of performance (COP) and exergy COP are presented for different operating conditions. Peculiar results of exergy analysis have been found for the indirect and direct fired single effect vapour absorption refrigeration systems. Exergy COP of indirect fired system is around 90% higher, while the optimum generator temperature is 19% lower than the direct fired system. Additionally, effect of preheater is also analysed on the performance of the systems.