https://orcid.org/0000-0002-4751-6245
Abstract
Absorption refrigeration systems are widely used as an alternative to vapor compression refrigeration systems for heating and cooling applications, improving energy efficiency and reducing environmental impact. This paper comprehensively reviews the evolution of falling film absorbers, a key component of these systems. Falling film absorbers are particularly recognized for their compact design and high efficiency, making them suitable for various applications. The paper reviews several aspects of falling film absorbers, including design principles, operational mechanisms, and key performance factors, such as absorption rate, heat and mass transfer coefficients, and system configuration. Consequently, it evaluates the operation of these systems by studying critical elements such as spray density, Reynolds number, the presence of nonabsorbable gases, and the addition of nanoparticles. Additionally, this study highlights several long-standing challenges, such as maintaining a uniform distribution of the film in the system or scaling issues. However, advancements such as the integration of nanoparticles in the working fluid help improve efficiency. This study aims to guide future research and development toward advanced and sustainable absorption refrigeration systems based on an objective evaluation of their benefits and drawbacks.
Issue Section:
Review Articles
Topics:
Absorption,
Heat,
Mass transfer,
Nanoparticles,
Refrigeration,
Heat transfer,
Flow (Dynamics),
Design,
Vapors,
Simulation,
Modeling
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