Design and Performance Analysis of Hybrid HVAC Systems Combining Solar-Assisted and Vapor Compression Technologies

Abstract

In this study we present the design, simulation and experimental evaluation of a hybrid HVAC system which combines solar assisted thermal energy with conventional vapor compression technology and therefore increases efficiency and reduces environmental impact. The proposed system incorporates flat plate solar collectors to preheat the working fluid which reduces the compressor workload and increases the overall Coefficient of Performance (COP). Using excess solar energy, thermal storage is employed to extend operational continuity beyond peak sunlight hours. Experimental data were collected from prototypes tested under subtropical climatic conditions and validated with comprehensive modeling in MATLAB Simulink and TRNSYS. Results show significant improvement of 35% average COP and a reduction of 38.17% in daily energy consumption over the conventional system. Then, the system also helped to reduce carbon dioxide emission significantly, over 3.7 kg per unit per day. The results provide the proof of concept for hybrid HVAC systems in the context of sustainable buildings in the solar rich regions. Moreover, system integration, thermal storage and smart control are emphasized as methods for maximizing performance. These insights contribute to broader efforts to design energy efficiently, to create climate responsive architecture and to embrace renewable energies in the built environment.

Keywords: Hybrid HVAC System, Solar-Assisted Cooling, Vapor Compression, Energy Efficiency, Thermal Storage, Cop Improvement, Sustainable Building Design, Carbon Emissions Reduction, Renewable Integration, Experimental Validation