A New Computational Tool for the Development of Advanced Exergy Analysis and LCA on Single Effect LiBr–H2O Solar Absorption Refrigeration System

Abstract

A single effect LiBr–H2O absorption refrigeration system coupled with a solar collector and a storage tank was studied to develop an assessment tool using the built-in App Designer in MATLAB®. The model is developed using balances of mass, energy, and species conservation in the components of the absorption cooling system, taking into account the effect of external streams through temperature and pressure drop. The whole system, coupled with the solar energy harvesting arrangement, is modeled for 24 h of operation with changes on an hourly basis based on ambient temperature, cooling system load demand, and hourly solar irradiation, which is measured and recorded by national weather institutes sources. Test through simulations and validation procedures are carried out with acknowledged scientific articles. These show 2.65% of maximum relative error on the energy analysis with respect to cited authors. The environmental conditions used in the study were evaluated in Barranquilla, Colombia, with datasets of the Institute of Hydrology, Meteorology and Environmental Studies (IDEAM), considering multiannual average hourly basis solar irradiation. This allowed the authors to obtain the behavior of the surface temperature of the water in the tank, COP, and exergy efficiency of the system. The simulations also stated the generator as the biggest source of irreversibility with around 45.53% of total exergy destruction in the inner cycle without considering the solar array, in which case the solar array would present the most exergy destruction.

Diseño de un sistema de supervisión y control del centro de datos del Grupo Empresarial CUBANÍQUEL.

“…En la Tabla 1 se muestran los resultados del cálculo de la carga térmica total del local con el apoyo del tutorial no. 255 de la Biblioteca de tutoriales Web de [13], [14].…”

Automation of the air conditioning system for aseptic rooms of pharmaceutical production

“…The absence of favorable environmental conditions is observed in the air conditioning system of classified areas C and D, which are clean areas to carry out less critical phases to manufacture sterile products or develop stages where the product is not directly exposed. For that reason, the inspection of "Good Practices for the Manufacture of Sterile Products," carried out by Auditors of the Company, and the State Center for the Control of Medicines, Medical Equipment and Devices (CECMED), concluded in "non-conformities" due to no fulfillment of the regulations established for air conditioning systems [8]- [10]. Consequently, the design of an automation system for the supervision and control of specific environmental variables for the areas object of study is proposed in this paper following the standard parameters established for air conditioning systems to obtain high-quality productions and save considerable energy.…”

ORC Technology Based on Advanced Li-Br Absorption Refrigerator with Solar Collectors and a Contact Heat Exchanger for Greenhouse Gas Capture

“…and Alvarez J.R.N. developed a unified system based on LiBr-H 2 O solar absorption refrigeration [34]. A similar system was developed by the authors Solano-Olivares, K. et al in their study [35].…”