JP Journal of Heat and Mass Transfer
Volume 13, Issue 3, Pages 361 - 377
(August 2016) http://dx.doi.org/10.17654/MT013030361 |
|
CHARACTERISTICS ON THE WASTE HEAT RECOVERY OF THE ECONOMIZER APPLIED WITH AND WITHOUT SCR SYSTEMS IN A PROPULSION DIESEL ENGINE
Changhee Lee
|
Abstract: In this paper, the efficiency of the waste heat recovery system inside a marine ship, which has an economizer attached to the end of the exhaust pipe, has been analyzed for with selective catalyst reduction (SCR) systems and without SCR systems, using the mass heat balance method. In the case of without an SCR system, the temperature of the downstream SCR is decreased by heat transfer at the wall surface. This system is necessary as a heat source for the operation of the economizer. In the case of with an SCR system, the exhaust temperature of the downstream SCR is increased by a hydrolysis reaction, in which a urea solution undergoes a reaction to break the bonds in the molecules using water. The efficiency of the economizer is excellent in the case of exhaust gas bypass (EGB), dosing system, and additional burner heat, as compared to the without SCR system. Finally, this system has an efficiency of approximately 30% for the waste recovery system with EGB and an additional heat source of a burner. |
Keywords and phrases: selective catalyst reduction (SCR), heat waste recovery, exhaust gas bypass (EGB), mass heat balance, specific fuel consumption (SFC), marine diesel engine. |
|
Number of Downloads: 305 | Number of Views: 971 |
|