US 11,658,314 B2
Method and system for preventing injury from hot exhaust gas
Mads Bang, Stovring (DK); Deni Maric, Aalborg (DK); Peter Leander Jensen, Svenstrup (DK); and Fan Zhou, Klarup (DK)
Assigned to BLUE WORLD TECHNOLOGIES HOLDING APS, Aalborg Øst (DK)
Appl. No. 17/793,546
Filed by BLUE WORLD TECHNOLOGIES HOLDING APS, Aalborg Ost (DK)
PCT Filed Jan. 12, 2021, PCT No. PCT/DK2021/050010
§ 371(c)(1), (2) Date Jul. 18, 2022,
PCT Pub. No. WO2021/148092, PCT Pub. Date Jul. 29, 2021.
Claims priority of application No. PA 2020 00064 (DK), filed on Jan. 20, 2020.
Prior Publication US 2023/0040546 A1, Feb. 9, 2023
Int. Cl. H01M 8/04007 (2016.01); H01M 8/04119 (2016.01); B01D 5/00 (2006.01); F01N 3/022 (2006.01)
CPC H01M 8/04007 (2013.01) [B01D 5/0027 (2013.01); F01N 3/022 (2013.01); H01M 8/04164 (2013.01); B01D 2258/0208 (2013.01); H01M 2250/20 (2013.01)] 10 Claims
 
1. A method of preventing injury from hot exhaust gas released from an exhaust system through an outlet of an exhaust pipe of a vehicle, the vehicle comprising a high temperature fuel cell system that is operating at temperatures in the range of 120-200° C. when producing electrical power, wherein the method comprises:
providing a wire mesh in the flow path of the exhaust gas through the exhaust system from the fuel cell to the exhaust pipe outlet,
wherein the exhaust gas contains water vapor, and wherein the method comprises condensing water drops with the wire mesh for creating dried exhaust gas, and releasing the drops through the exhaust pipe and out of the exhaust pipe outlet together with the dried exhaust gas,
wherein the wire mesh is provided inside the exhaust pipe of the vehicle, the exhaust pipe defining the flow path of the exhaust gas to the exhaust pipe outlet, wherein the wire mesh extends entirely across the exhaust flow path in order to prevent the water vapor to bypass the wire mesh;
wherein the method further comprises:
providing a heat exchanger for cooling the water vapor in the exhaust gas in the flow path to the exhaust pipe outlet and wherein the method comprises cooling the vapor to below its dew point upstream of the wire mesh in order to cause increased drop formation in the wire mesh; and/or
raising the dew point of the water vapor by raising the pressure of the water vapor in the exhaust system for increased condensation.