The refrigeration systems consume a high amount of energy. In Jordan, conventional energy is an expensive option. Thus, this consumption will be significant. In this work, a mathematical model of the Single-Effect Solar Absorption Cooling system (SESAC), utilizing Lithium Bromide-Water (LiBr–H2O) as the working fluid, has been developed with evacuated tube collectors. This model has been designed according to the climate in. The refrigeration systems consume a high amount of energy. In Jordan, conventional energy is an expensive option. Thus, this consumption will be significant. In this work, a mathematical model of the Single-Effect Solar Absorption Cooling system (SESAC), utilizing Lithium Bromide-Water (LiBr–H2O) as the working fluid, has been developed with evacuated tube collectors. This model has been designed according to the climate in Ma'an, Jordan. The effect of the temperature changing of the cooling system cycle on the coefficient of performance (COP) and the LiBr–H2O crystallization has been investigated using MATLAB/Simulink environment. The best temperatures at which the system operates without crystallization were defined. Moreover, the effect of improving the heat exchanger solution on the overall system performance has been investigated. The medium cooling capacity was (120 kW) and it runs by 243.3 m2 evacuated tube solar collectors. It was found that the generator's temperature is the critical factor that affects the system's performance as a whole. The highest value of COP was 0.74, at a generator temperature of 110 °C without crystallization.••Renewable energyClean coolingSystem performanceAbsorptiona0 Optical Collector Efficiency (%)a1,a2 Heat Loss Coefficients (W/m2K)Aa Aperture Area (m2)G Global Solar Radiation (W/m2)Gb Direct Solar Radiation (W/m2)Gd Solar, wind, ocean, and geothermal are clean, environmentally friendly, and are virtually inexhaustible. These resources can cater to the increasing energy demand and reduce pollution levels. In contrast, energy use for space cooling is growing due to climate change and variability. Therefore, utilizing air conditioning (AC) to maintain thermal comfort is becoming one of the most important types of energy consumption [2,3]. The energy used for thermal comfort is growing faster than for the use of any other energy service. Recently, the International Energy Agency (IEA) noted that about 20% of the total electricity used worldwide is utilized to cool buildings. In addition, the report mentioned that, by 2050, around 2/3 of the world's households could have an air conditioner.Consequently, energy demand for thermal comfort will triple by 2050. Thus, it is crucial to develop novel approaches for heating and cooling systems based on renewables to reduce the energy consumption of thermal comfort and be compliant with new environmental regulations [,, ]. These studies are considered an attractive option since the energy demand for space cooling correlates with the high availability of renewables (solar, wind). Thus using solar and wind energy to meet this requirement is feasible [8,9].The. 2.1. System descriptionLiBr–H2O absorption cooling system is working according to a single-stage or single-effect type. The basic vapor absorption cycle uses H2O–LiBr as the working pair in which H2O is the refrigerant and LiBr the absorbent. It can be considered a combination of two parts, as shown in Fig. 1. The work produces part (red dotted box) and a refrigeration one (black dotted box).2.2. Model setupBuilding a model for SESAC leads to an understanding of the system behavior and reduces the improvement time, construction cost, and risk. The previous studies have used different programs to simulate cooling systems, including TRNSYS software, EES program, FORTRAN software, and TRANSOL simulation tools. MATLAB software was used in this work as it is a clear technical language for mathematical programming [42,43]. MATLAB Simulink can design heat and cooling system models in the thermal liquid domain. These models undergo temperature and viscosity changes due to processes internal and external to a block or network.The input parameters include the temperature of the generator, condenser, evaporator, and absorbe.
