Dynamic modeling and simulation of a double-effect absorption heat pump. (December 2016)

• Record Type: Journal Article
• Authors: de la Calle, Alberto; Roca, Lidia; Bonilla, Javier; Palenzuela, Patricia
• Is Part Of: International journal of refrigeration. Volume 72(2016:Dec.)
• Page Start: 171
• Page End: 191
• Publication Date: 2016-12
• Subjects: Lithium bromide -- Phase transitions -- Falling film -- Object-oriented modeling -- Modelica; Bromure de lithium -- Transitions de phase -- Film tombant -- Modélisation orientée objet -- Modelica; Refrigeration and refrigerating machinery -- Periodicals; 621.56
• DOI: 10.1016/j.ijrefrig.2016.07.018
• Languages: English
• ISSNs: 0140-7007

Abstract

Highlights: A new mathematical model has been developed to simulate the dynamic operation of a DEAHP. The model design is based on a DEAHP integrated into a MED process. The model is composed of modular and hierarchical components. A new automatic control system for a stable operation is developed. The model was calibrated and validated against experimental data. Abstract: This paper presents a new dynamic model to study the transient thermochemical behavior of a double-effect absorption heat pump (DEAHP). It has been designed according to the experience with an experimental DEAHP totally integrated into a solar-assisted multi-effect distillation (MED) plant set up at CIEMAT – Plataforma Solar de Almería (PSA). The non-linear first-principles model was implemented using the equation-based object-oriented Modelica modeling language and is based on a mathematical formulation that describes the main heat and mass transfer phenomena in this kind of facilities. A modular and hierarchical modeling methodology has allowed a graphical modeling development. Submodels that wrap the different physical phenomena are interconnected between them, thus making a three level deep hierarchy. All the submodels have been calibrated and validated with experimental data. The numerical predictions show a good agreement with measured data.