## 1 Introduction
[PERSON] and [PERSON] [6] noted that Sweden offers favorable conditions for implementing absorption technology using waste heat from electricity generation in heat and power plants. They calculated that applying tri-generation technology may result in an 80% national-scale reduction in carbon dioxide emissions and a 170% reduction in the costs of cooling energy generation as a result of the sale of electricity generated in this way. A similar analysis of the Finnish energy market was conducted by [PERSON] and [PERSON] [7], who noted the attractiveness of using tri-generation systems. [PERSON] and [PERSON] [8] analyzed the energy and exergy efficiency of a low-power tri-generation system based on a gas-fueled microturbine and a single-stage absorption chiller. They demonstrated that in such systems, the key parameter impacting efficiency is the optimal use of waste heat, i.e., the heat of the exhaust gases generated in the gas microturbine. From the point of view of synergy between absorption chillers and combined heat and power (CHP) systems, another important parameter is the required temperature of the heat vector supplied to the boiler. [PERSON] et al. [9] studied the influence of supply temperature on the EER in single-, dual- and three-stage absorption systems. They found that the maximum EER value for a typical vaporization temperature (T\({}_{\mathrm{v}}\) = 4 \({}^{\circ}\)C) was 95 \({}^{\circ}\)C for single-stage systems (EER = 0.7), 190 \({}^{\circ}\)C for dual-stage systems (EER = 1.2), and 205 \({}^{\circ}\)C for three-stage stage systems (EER= 1.6). The rising required temperature of boiler power supply negatively impacted the operation of CHP production, resulting in a lower co-generation ratio. [PERSON] and [PERSON] [10] conducted an analysis of systems with various heat exchanger designs, all sharing the same EER coefficient. Their study on the effects of the working fluid's mass flow rate and the inlet temperatures of the cooling water, chilled water, and heating fluid from the heat source showed that a decrease in the working fluid's mass flow rate resulted in reduced exergy loss for the system element in question. Additionally, they observed that the total system exergy rose when the heat source and inlet chilled water temperatures were lower and the inlet cooling water temperature was higher. The analysis found that the absorber and condenser experienced the most significant exergy losses. Consequently, the studies recommended modifying the cooling tower by decreasing the cooling water's mass flow rate while increasing its temperature, ensuring that it can still satisfy cooling demand. In an article by [PERSON] and others [11], a thermoeconomic analysis of a solar-powered absorption cooling system integrated with different types of collectors was presented. Their analysis revealed that the system performance factor increased with an increase in source temperature and evaporator temperature, while the exergy efficiency was proportional to the temperature of the water supplying the generator and inversely proportional to the temperatures of the evaporator, absorber, and condenser. It was pointed out that the most economical solution from the perspective of exergy efficiency was a solar absorption cooling system utilizing evacuated tube collectors (ETC), with an exergy efficiency of 0.66. However, when interpreting the system efficiency data, the use of parabolic trough collectors (PTCs) proved to be the most favorable solution. [PERSON] et al. [12] conducted a series of studies and analyses on an absorption cooling system using lithium bromide and water, powered by solar energy (flat plate collector). Aspects including the impact of different types of collectors on efficiency and heat gain, the inlet temperature to the generator, the efficiency of the heat exchanger, and the mass flow rate of the working fluid were assessed to determine their influence on system performance.