Impact of ammonia-water concentrations on solar absorption refrigeration performance
<p class="TSAbstract"><span lang="EN-US">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 d...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Academy Publishing Center
2025-04-01
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| Series: | Renewable Energy and Sustainable Development |
| Subjects: | |
| Online Access: | http://apc.aast.edu/ojs/index.php/RESD/article/view/1223 |
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| Summary: | <p class="TSAbstract"><span lang="EN-US">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.</span></p><p class="TSAbstract"><span lang="EN-US"><br /></span></p><p class="TSAbstract"><strong><span lang="EN-US">Received on, 10 February 2025 </span></strong></p><p class="TSAbstract"><strong><span lang="EN-US">Accepted on, 25 March 2025 </span></strong></p><p class="TSAbstract"><strong><span lang="EN-US">Published on, 10 April 2025</span></strong></p> |
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| ISSN: | 2356-8518 2356-8569 |