Energy, Exergy, Environmental and Economic Analysis (4e) of a Solar Thermal System for Process Heating in Jamshoro, Pakistan

With an expected annual increase of 1.2%, the industrial sector already consumes over 54% of all the energy generated globally. The majority of industrial sectors presently relies on fossil fuels to fulfil their needs for heat energy, but renewable sources, especially solar energy, can be substituted for them. For an underdeveloped country such as Pakistan, its industrial sector is important for the country's economic development and long-term growth. The use of solar thermal energy potentially offers a significant and cheap alternative to fossil fuels. The current study focuses on a process heating system based on flat-plate solar collectors, developed to provide low to moderate temperature process heat. The innovative model's thermal efficiency and economic feasibility have undergone a thorough investigation and analysis through TRNSYS simulations. The system portrayed a 79% thermal energy efficiency and 4.31% exergy efficiency during peak hours. The optimized system for three different temperatures of 60 degrees C, 70 degrees C, and 80 degrees C was designed and evaluated. The system presented a total of 82 tons of CO2 prevention annually. The economic analysis consisting of three parameters, NPV, IRR and PBP, also deemed the FPC-based solar thermal system economically profitable.