Performance Analysis of a Solar-Powered DC System toward Sustainable Cooling and Heating in a Hot Arid Climate: A Madinah Case Study
Received: 4 October 2025 | Revised: 13 November 2025 | Accepted: 1 December 2025 | Online: 9 February 2026
Corresponding author: Abdulrahman Al Kassem
Abstract
As global temperatures rise and energy demands intensify, innovative climate-control solutions are essential for sustaining comfort in extreme environments. However, most existing Air-Conditioning (A/C) systems in hot-arid regions still rely on conventional Alternating-Current (AC) power, leading to significant conversion losses and limiting solar integration. This highlights the necessity for efficient, fully Direct-Current (DC)-powered alternatives. This study evaluates the performance and energy efficiency of a variable-speed DC A/C and heating system installed in Madinah, Saudi Arabia, during the summer of 2024 (June, July, August) and the winter of 2025 (January). The experimental investigation analyzes cooling and heating capacities, power consumption, ambient and indoor temperatures, and the Coefficient of Performance (COP). The system maintained an average indoor temperature of approximately 24 °C in summer and 25 °C in winter, ensuring thermal comfort despite outdoor temperatures exceeding 45 °C in summer and dropping to around 10 °C in winter. The peak cooling capacity reached 2261.4 W in July, accompanied by a 3% increase in total energy consumption compared to June. The highest cooling COP of 3.08 was recorded in June. This value decreased to 2.81 in July and recovered to 2.91 in August. During winter heating operation, the system achieved a COP of 5.72, delivering 10.19 kWh of heat with minimal energy input and demonstrating strong seasonal performance. The variable-speed operation enabled efficient adaptation to fluctuating conditions, confirming its suitability for extreme climates. The findings encourage future optimization through improved insulation, advanced control strategies, and renewable energy integration to enhance overall efficiency and promote sustainable building technologies.
Keywords:
solar-powered A/C, DC air conditioning, energy efficiency, heating technologyDownloads
References
T. M. Olatunde, A. C. Okwandu, D. O. Akande, and Z. Q. Sikhakhane, "Review of energy-efficient HVAC technologies for sustainable buildings," International Journal of Science and Technology Research Archive, vol. 6, no. 02, pp. 012–020, 2024. DOI: https://doi.org/10.53771/ijstra.2024.6.2.0039
N. Howarth, N. Odnoletkova, T. Alshehri, A. Almadani, A. Lanza, and T. Patzek, "Staying Cool in A Warming Climate: Temperature, Electricity and Air Conditioning in Saudi Arabia," Climate, vol. 8, no. 1, 2020, Art. no. 4. DOI: https://doi.org/10.3390/cli8010004
N. S. A. Al Fardi, O. Zeitoun, and M. B. Elsheniti, "Energy-Efficient Design Optimization of a Multistage Indirect Evaporative Cooler for Sustainable Cooling in Hot and Dry Climates," Sustainability, vol. 17, no. 21, 2025, Art. no. 9867. DOI: https://doi.org/10.3390/su17219867
N. Nasrullah and M. A. Hamdy, "Air Conditioning Energy Efficiency and Thermal Comfort in Hotel Buildings in Hot and Humid Tropical Climates: The Case Study of Makassar City Coastal Area Hotel, South Sulawesi, Indonesia," Engineering, Technology & Applied Science Research, vol. 14, no. 6, pp. 18290–18299, Dec. 2024. DOI: https://doi.org/10.48084/etasr.8463
M. Mestarehi and O. Omar, "Evaluating the Effectiveness of Regulatory Frameworks for Transitioning to Net-Zero Energy Buildings in a Tropical Desert Climate," Energies, vol. 18, no. 2, 2025, Art. no. 367. DOI: https://doi.org/10.3390/en18020367
Y. H. A. Amran, Y. H. M. Amran, R. Alyousef, and H. Alabduljabbar, "Renewable and sustainable energy production in Saudi Arabia according to Saudi Vision 2030; Current status and future prospects," Journal of Cleaner Production, vol. 247, Feb. 2020, Art. no. 119602. DOI: https://doi.org/10.1016/j.jclepro.2019.119602
A. M. Alotaibi, T. K. Makhdoom, and A. B. S. Alquaity, "Pathways Toward Improving the Energy Efficiency of Residential Air-Conditioning Systems in Saudi Arabia," Journal of Solar Energy Engineering, vol. 146, no. 5, Oct. 2024, Art. no. 051010. DOI: https://doi.org/10.1115/1.4065973
F. J. Aguilar, S. Aledo, and P. V. Quiles, "Experimental analysis of an air conditioner powered by photovoltaic energy and supported by the grid," Applied Thermal Engineering, vol. 123, pp. 486–497, Aug. 2017. DOI: https://doi.org/10.1016/j.applthermaleng.2017.05.123
E. Alrwishdi, A. Draou, S. Alahmadi, M. Ouzzane, and M. Bady, "Performance Analysis of a Direct Current Air Conditioning System Powered by Photovoltaics in a Hot Climate," International Journal of Energy, Environment and Economics, vol. 33, no. 1, pp. 71–91, 2025.
W. Pang, H. Yu, Y. Zhang, and H. Yan, "Solar photovoltaic based air cooling system for vehicles," Renewable Energy, vol. 130, pp. 25–31, Jan. 2019. DOI: https://doi.org/10.1016/j.renene.2018.06.048
Z. Liu, A. Li, Q. Wang, Y. Chi, and L. Zhang, "Performance study of a quasi grid-connected photovoltaic powered DC air conditioner in a hot summer zone," Applied Thermal Engineering, vol. 121, pp. 1102–1110, July 2017. DOI: https://doi.org/10.1016/j.applthermaleng.2017.03.132
Y. Li, B. Y. Zhao, Z. G. Zhao, R. A. Taylor, and R. Z. Wang, "Performance study of a grid-connected photovoltaic powered central air conditioner in the South China climate," Renewable Energy, vol. 126, pp. 1113–1125, Oct. 2018. DOI: https://doi.org/10.1016/j.renene.2017.05.064
X. Zhao, X. Zhang, S. B. Riffat, and Y. Su, "Theoretical study of the performance of a novel PV/e roof module for heat pump operation," Energy Conversion and Management, vol. 52, no. 1, pp. 603–614, Jan. 2011. DOI: https://doi.org/10.1016/j.enconman.2010.07.036
E. M. Salilih, Y. T. Birhane, and S. H. Arshi, "Performance analysis of DC type variable speed solar pumping system under various pumping heads," Solar Energy, vol. 208, pp. 1039–1047, Sept. 2020. DOI: https://doi.org/10.1016/j.solener.2020.08.071
S. Mehmood, J. Lizana, and D. Friedrich, "Solar-driven absorption cooling system with latent heat storage for extremely hot climates," Energy Conversion and Management, vol. 297, Dec. 2023, Art. no. 117737. DOI: https://doi.org/10.1016/j.enconman.2023.117737
Z. He et al., "Heat transfer enhancement and exergy efficiency improvement of a micro combustor with internal spiral fins for thermophotovoltaic systems," Applied Thermal Engineering, vol. 189, May 2021, Art. no. 116723. DOI: https://doi.org/10.1016/j.applthermaleng.2021.116723
A. Kane, V. Verma, and B. Singh, "Optimization of thermoelectric cooling technology for an active cooling of photovoltaic panel," Renewable and Sustainable Energy Reviews, vol. 75, pp. 1295–1305, Aug. 2017. DOI: https://doi.org/10.1016/j.rser.2016.11.114
M. Mani and R. Pillai, "Impact of dust on solar photovoltaic (PV) performance: Research status, challenges and recommendations," Renewable and Sustainable Energy Reviews, vol. 14, no. 9, pp. 3124–3131, Dec. 2010. DOI: https://doi.org/10.1016/j.rser.2010.07.065
A. Y. Sulaiman et al., "A solar powered off-grid air conditioning system with natural refrigerant for residential buildings: A theoretical and experimental evaluation," Cleaner Energy Systems, vol. 5, Aug. 2023, Art. no. 100077. DOI: https://doi.org/10.1016/j.cles.2023.100077
R. Gayapershad and F. L. Inambao, "Solar-Assisted Technologies for Cooling and air Conditioning – A Review," International Journal of Mechanical Engineering and Technology, vol. 10, no. 11, pp. 199–215, Nov. 2019.
S. F. Al-Gahtani, "Saudi Arabia's Journey toward a Renewable Future," Energies, vol. 17, no. 11, Jan. 2024, Art. no. 2444. DOI: https://doi.org/10.3390/en17112444
Meteonorm, Version 8.2, Meteotest, https://meteonorm.com/.
H. Hassan, "Comparing the performance of passive and active double and single slope solar stills incorporated with parabolic trough collector via energy, exergy and productivity," Renewable Energy, vol. 148, pp. 437–450, Apr. 2020. DOI: https://doi.org/10.1016/j.renene.2019.10.050
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Copyright (c) 2025 Emad Alrwishdi, Saleh Al Ahmadi, Abdulrahman Al Kassem, Azeddine Draou
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