Energy and exergy analysis of an experimental single-stage heat transformer operating with the water/lithium bromide mixture

2009 ◽  
Vol 34 (13) ◽  
pp. 1121-1131 ◽  
Author(s):  
W. Rivera ◽  
J. Cerezo ◽  
H. Martínez
Keyword(s):  
Exergy Analysis ◽  
Lithium Bromide ◽  
Single Stage ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Heat Transformer

scholarly journals Energy and Exergy Analysis of LiBr-aq and LiCl-aq Liquid Desiccant Dehumidification System

2020 ◽  
Vol 14 (1) ◽  
pp. 36-40
Author(s):  
Barış KavasoğullarI ◽  
Ertuğrul Cihan ◽  
Hasan Demir
Keyword(s):  
Exergy Analysis ◽  
Lithium Bromide ◽  
Exergy Efficiency ◽  
Coefficient Of Performance ◽  
Airflow Rate ◽  
Liquid Desiccant ◽  
Energy And Exergy ◽  
Liquid Desiccant Dehumidification ◽  
Energy And Exergy Analysis ◽  
Mass Flow Rates

In this study, energy and exergy analysis of experimental results obtained from a dehumidification system using LiBr-aq (lithium bromide-water) and LiCl-aq (lithium chloridewater) as desiccant was made. In dehumidifier and regenerator columns polycarbonate sheets, which have not been used before, were used as packing material to increase contact area in purposed liquid desiccant dehumidification system. In the analysis, variation of electrical coefficient of performance and exergy efficiency with airflow rate for different solution mass flow rates were investigated. Because of investigation, maximum values of electrical coefficient of performance and exergy efficiency were calculated approximately as 2.8 and 18%, respectively.

scholarly journals Energy and Exergy Analysis of an Absorption and Mechanical System for a Dehumidification Unit in a Gelatin Factory

Entropy ◽  
2021 ◽  
Vol 23 (4) ◽  
pp. 415
Author(s):  
Lucas Lima ◽  
Carlos Keutenedjian Mady
Keyword(s):  
Exergy Analysis ◽  
Binary Solution ◽  
Electrical Power ◽  
Lithium Bromide ◽  
Absolute Humidity ◽  
Working Fluid ◽  
Vapor Compression ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Environmental Air

In this paper, an energy and exergy analysis is applied to the air dehumidification unit of a liquid desiccant system in an industrial gelatin conveyor dryer. The working fluid is a binary solution of lithium chloride (LiCl) in water. Dry air is used in order to decrease the amount of liquid in the gelatin. Therefore, the environmental air must have its absolute humidity reduced from about 12 g/kg to the project target, which is 5 g/kg. The process is a cycle using an absorption desiccant unit (LiCl in water), where the weak solution absorbs water vapor from the air. In the regenerator, condensation of the solution (desorption) from the moist air occurs. As a result, the steam consumption of the desorber and electrical power used for the vapor compression chiller (with ammonia, NH3, as working fluid) are the primary sources of cost for the factory. To improve the plant’s energy and exergy behaviors, the process is evaluated using a mathematical model of the system processes. In addition, we evaluate the substitution of the vapor compression chiller by an absorption unit (lithium bromide (LiBr) in water). The performance indicators of the compression vapor systems showed the best results. Even when using the condenser’s energy to pre-heat the solution, the installed system proved to be more effective.

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