Year: 2025
Type: article
Abstract: Increased demand for summer comfort due to heat waves is driving the adoption of absorption refrigeration systems. These systems use free solar energy and environmentally friendly refrigerants, offering a sustainable solution despite their lower efficiency. This study investigates the effect of refrigerant ammoniac (NH₃) mass concentration on the performance parameters of a single-effect solar absorption refrigeration system using the NH3/H2O binary pair. A thermodynamic model is developed to evaluate the system’s coefficient of performance (COP) under varying generator temperatures, evaporator temperatures, and pressures. Results show that the COP increases significantly with NH₃ concentrations up to a threshold (23-25%), beyond which it stabilizes. Optimal performance is achieved at a generator temperature of 114°C, a low pressure of 1 bar, and an NH₃ concentration of 25%, yielding a maximum COP of 1.296. Additionally, the COP decreases with higher evaporator temperatures and pressures, highlighting the critical influence of thermodynamic parameters. This analysis underscores the importance of optimizing NH₃ concentrations and system operating conditions to maximize energy efficiency and facilitate sustainable cooling applications in solar-rich regions. Received on, 10 February 2025 Accepted on, 25 March 2025 Published on, 10 April 2025
Authors: Mohammed El Amine Chikh, Mohammed Benramdane, Abdennour Aliane, Bilal Abdesselam
Institution: University of Abou Bekr Belkaïd
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4410146795