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Integrated Assessment of Energy Storage and Thermal Losses in a Paraffin-Enhanced Solar Air Heater for Efficient Room Heating | ||
| Journal of Solar Energy Research | ||
| دوره 10، شماره 4، دی 2025، صفحه 2672-2690 اصل مقاله (957.51 K) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22059/jser.2026.406779.1671 | ||
| نویسندگان | ||
| Salah Haji Abid Aun* ؛ Afaq Jasim Mahmood؛ Hussein Mohammed Al-Mrayatee | ||
| Middle Technical University, Polytechnic College of Engineering Specializations, Baghdad, Iraq | ||
| چکیده | ||
| This paper presents an experimental investigation of the thermal performance, energy-storage capability, environmental impact, and financial feasibility of a dual solar air heater using paraffin wax as a phase change material (PCM) and a perforated absorber plate. The system was tested under actual winter weather conditions at airflow rates ranging from minimum 0.017 kg/s to maximum 0.032 kg/s to evaluate the useful thermal energy gain, heat loss, outlet air temperature, and overall thermal efficiency. The results show that at the optimal airflow rate 0.026 - 0.032 kg/s, the system produced approximately 32.36 MJ/day of net useful thermal energy—sufficient to raise the temperature of an indoor space of 2,677 m³ by 10 °C. A maximum thermal efficiency of 78% was achieved with a relatively low total heat loss of 205 W. In contrast, the maximum outlet temperature of 64 °C occurred at the lower airflow rate of 0.017 kg/s, which resulted in higher heat losses due to convection and radiative of 296 W. These increased losses caused a 10% reduction in thermal efficiency. Based on Iraq’s national thermal-energy emission factor of 0.95 kg CO₂/kWh, the system has the potential to reduce annual carbon dioxide emissions by approximately 1.86 metric tons. | ||
| کلیدواژهها | ||
| PCM؛ Collector؛ Intensity؛ Convection؛ Radiation | ||
| مراجع | ||
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