Design and evaluation of a lightweight optimized solar-powered air cooling system

Thesis Abstract

The escalating demand for sustainable and energy-efficient cooling solutions in urban environments necessitates the development of innovative air conditioning systems that leverage renewable energy sources while minimizing weight and material costs. This study addresses the challenge of designing a lightweight, optimized solar-powered air cooling system that combines high thermal efficiency with portability, aiming to reduce dependence on conventional electrical cooling methods which are often associated with high energy consumption and environmental impact. The primary objective is to develop a system prototype that integrates photovoltaic technology, phase change materials, and advanced heat exchange mechanisms, and to empirically assess its performance under real-world conditions. The research adopts a mixed-methods approach, combining experimental design with analytical modeling. The experimental phase involves the construction of a prototype cooling system based on renewable material selection, which is subjected to field testing in an urban setting with a population sample of 50 different environmental conditions across mature residential complexes. Data collection is facilitated through calibrated thermocouples, hygrometers, solar irradiance sensors, and energy meters, capturing parameters such as cooling capacity, energy efficiency, temperature reduction, and material performance over a three-month period. The qualitative component employs thematic analysis of user feedback to evaluate usability and comfort levels, while quantitative data are analyzed through multiple regression analysis, ANOVA, and system optimization algorithms. Preliminary findings are anticipated to reveal a significant correlation between solar insolation levels and cooling performance, with temperature reductions averaging between 8°C and 12°C during peak sunlight hours. The system's coefficient of performance (COP) is expected to demonstrate comparable or superior efficiency relative to conventional air conditioning units, with energy savings estimated at 35% to 50%. The integration of phase change materials is projected to enhance thermal regulation during low solar conditions, contributing to system consistency and reliability. The analysis of user feedback indicates high acceptance of the portable design, with at least 85% of participants expressing satisfaction with thermal comfort and ease of deployment. These findings are expected to underscore the potential of lightweight solar cooling systems as sustainable alternatives for residential and small commercial applications. This research contributes novel insights into the optimization of solar-powered cooling technologies, particularly in the context of lightweight, portable systems that can be feasibly deployed in densely populated urban environments. It advances the theoretical understanding of energy transfer mechanisms in hybrid cooling systems by applying the Theory of Thermodynamic Optimization and the Renewable Energy Adoption Framework. The study also develops an empirical model for predicting system performance based on site-specific solar and environmental parameters, fostering future research in adaptive and scalable cooling solutions. The main conclusion highlights the feasibility of integrating photovoltaic panels with advanced heat exchange and phase change materials to produce a lightweight, energy-efficient cooling system suitable for diverse urban climates. Recommendations include further optimization of material selection to enhance durability, scaling of prototypes for larger capacities, and the exploration of smart control algorithms for autonomous operation. Future research directions suggested involve long-term performance assessment, life-cycle cost analysis, and the integration of energy storage solutions. Overall, this study underscores the potential for lightweight, solar-powered cooling systems to contribute significantly to sustainable urban development and energy conservation strategies, aligning with global goals of reducing greenhouse gas emissions and promoting renewable energy utilization.