Techno-economics of a trigeneration HRES; a step towards sustainable development
2022
Kumar, Nagendra | Karmakar, Sujit
Technological development has shown several alternatives for energy and water supplies; still, almost 30% of the population of India has either no access or limited access to energy and portable water incredibly remote-rural areas of the Indian coast. The present work aims to optimize a sustainable Hybrid Renewable Energy System for trigeneration using solid waste generated from the society with uninterrupted supply and affordable economics. A gasifier utilizes biomass to produce the biogas. Freshwater generation is done with the help of thermal desalination. Generally, the excess electricity produced from any distributed system is dumped. Whereas in the present study, that opportunity has been grabbed, and a thermal load controller has been implemented to convert this excess electricity into thermal energy for the desalination process. The result shows that electricity and heat production from the HRES is 80423 kWh/year and 34778.62 MJ/year, respectively, with an affordable energy cost-Rs.5.16/kWh, minor Pay Back Period-3.99 years, Internal Rate of Return of 18.2%, and Return on Investment of 23.6% with Net Present Cost -Rs. 4,678,224 and operating cost - Rs. 189424.30. A multi-effect desalination unit produces 9516.24 lit/day of freshwater using heat from the thermal load controller and micro-gas turbine. Furthermore, HRES serves 1.528 kg/h of cooking gas.
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