Development of Main Marine Boilers’ Structures

Effect of Waste Heat Utilization on the Efficiency of Marine Main Boilers

“…This loss value occurs when the waste heat resources of the flue gas are not used. The minimum value of this loss of 5% occurs with the maximum use Energies 2022, 15, 9203 3 of 9 of waste heat while cooling the flue gas to a temperature of 130 • C, which does not cause low-temperature corrosion yet [2][3][4].…”

“…Increasing the efficiency of ship turbo steam power plants resulted in increasing the parameters of steam produced in the main boilers. In the years 1995-2010, the pressure of steam produced in ships' main boilers was ranging between 6.0 and 6.8 MPa, and steam's superheating temperature was 515-525 • C [2,3]. The improvement of material engineering allowed for the construction of experimental ship turbo steam power plants where main boilers produced steam with a pressure of 10-12 MPa, and a superheating temperature of 560 • C [4][5][6].…”

“…The improvement of material engineering allowed for the construction of experimental ship turbo steam power plants where main boilers produced steam with a pressure of 10-12 MPa, and a superheating temperature of 560 • C [4][5][6]. Apart from increasing the values of steam parameters, using steam inter-stage superheating, carnotization, and the use of waste heat, new boiler designs have been introduced to increase the speed of natural circulation [2]. These procedures allowed for achieving the efficiency of ship turbo steam power plants in the range of 39-41% [7].…”

“…The literature mainly deals with Energies 2022, 15, 9203 2 of 9 the development of boiler designs, increasing steam parameters and materials used for their construction in order to increase the efficiency of marine turbo steam power plants. The advisability of using waste heat in exhaust gases to heat boiler feed water and air to raise combustion temperature has also been discussed [2][3][4][8][9][10]. Boiler manufacturers' company materials [11][12][13] and vessel technical documentation were used to obtain data on the achieved temperatures of heated air supplied to the boiler furnace chamber.…”