Energy is an indispensable factor for the economic growth and development of a country. Energy consumption is rapidly increasing worldwide. To fulfill this energy demand, alternative energy sources and efficient utilization are being explored. Various sources of renewable energy and their efficient utilization are comprehensively reviewed and presented in this paper. Also the trend in research and development for the technological advancement of energy utilization and smart grid system for future energy security is presented. Results show that renewable energy resources are becoming more prevalent as more electricity generation becomes necessary and could provide half of the total energy demands by 2050. To satisfy the future energy demand, the smart grid system can be used as an efficient system for energy security. The smart grid also delivers significant environmental benefits by conservation and renewable generation integration.
Bangladesh is facing an energy crisis that is likely to become worse in the future because of insufficient power generation. Approximately 50% of the total population lives without grid-connected electricity. Moreover, the people connected to the grid are unable to access an even and continuous power supply on a daily basis. This research investigated the potential of renewable energy technologies, specifically photovoltaic (PV) power generation, and its economic and environmental impacts in Bangladesh. The concerns about the costs of PV technologies for Bangladesh were addressed by scenario modeling analysis and calculating the net present cost, cost of energy (COE), and bill savings for a 21-yr period. Results showed that 1 and 2 kWp systems could reduce the total energy cost by US$4495.856 and US$2191.69, respectively, and decrease the COE by 0.198 and 0.096 per kW h in a 21-yr period. Over a 21-yr period, 1 kWp PV systems could lower future emissions by a total of 10 162 kg of CO 2 , 65 kg of SO 2 , 30 kg of NO x , and 6 kg of CO, whereas 2 kWp PV systems could reduce future emissions by a total of 20 302 kg of CO 2 , 129 kg of SO 2 , 60 kg of NO x , and 12 kg of CO. V C 2015 AIP Publishing LLC.
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