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Portable Power Generators
Published in Richard Cadena, Electricity for the Entertainment Electrician & Technician, 2021
There are other terms in generator specs that are important to understand as well. Often times, the output is listed as “standby” power and/or “prime” power. Backup generators are designed to provide backup power in the event that the grid power or building power is lost. These generators are not expected to run 24/7/365, so they are designed to run harder for short periods of time. Standby generators can operate at 100% of the standby rating until grid power is restored, but they are not designed to be loaded more than their rating for any period of time.
Multi-objective optimisation on steady-state thermodynamic parameters of S-CO2 recompression Brayton cycle power generation system for marine waste heat recovery
Published in Journal of Marine Engineering & Technology, 2023
Pengcheng Pan, Chengqing Yuan, Yuwei Sun, Xinping Yan, Mingjian Lu, Richard Bucknall
Apart from the research into the application of S-CO2 cycles in terrestrial power generation industries, study on introducing S-CO2 cycles into ships to recover the main engine waste heat has also been carried out. Moroz et al. (2015) studied the performance of a combined S-CO2 and a conventional steam cycle to recover a shipboard gas turbine and found that the net power output increased by about 30%. Bella (2015) analysed the performance of the S-CO2 Brayton power cycle to recover the ship’s gas turbine exhaust gas waste heat, which can lower the fuel consumption by about 22%. Sharma et al. (2017) conducted the parametric optimisation of a S-CO2 regenerative recompression Brayton power cycle to recover a ship’s gas turbine exhaust gas waste heat and it was found that the overall energy system efficiency and net power output increased by 10% and 25%, respectively. Hou et al. (2017) stated that the S-CO2 regenerative recompression cycle system could be used as the backup generator because it can meet 80% of the propulsion power demand of the ship when the gas turbine fails. Furthermore, Choi (2016) studied the thermodynamic performance of a transcritical CO2 heat recovery system with a 2-stage reheat to recover the internal combustion engine cooling water waste heat in a 6800 TEU container ship. The aforementioned research has proved that the S-CO2 cycle can be used as waste heat recovery systems in ships to contribute to the goal of energy-saving and emissions reduction in the shipping industry.