摘要:
A heat exchanger (50) is provided for transferring heat between first and second fluids (52) and (54) having a maximum operating mass flow rate through the heat exchanger (50) and mass flow rates that are substantially proportional to each other. The heat exchanger (50) provides essentially constant outlet temperatures for the first and second fluids (52,54) for all of the flow rates within the operating spectrum of the heat exchanger (50) without the use of an active control system. The heat exchanger (50) is of particular use in the fuel processing system (36) of proton exchange membrane type fuel cell systems.
摘要:
An integrated steam reformer/combustor assembly (42) is provided for use in a fuel processor (20) that supplies a steam/fuel feed mix (34) to be reformed in the assembly and a combustor feed (40) to be combusted in the assembly (42). The assembly (42) includes a housing (44,58) defining first and second axially extending, concentric annular passages in heat transfer relation to each other; a first convoluted fin (46) located in the first passage to direct the feed mix therethrough, the first convoluted fin coated with a catalyst that induces a desired reaction in the feed mix; and a second convoluted fin (50) located in the second passage to direct the combustor feed therethrough, the second convoluted fin coated with a catalyst that induces a desired reaction in the combustor feed.
摘要:
A fuel processing system is provided wherein heat is transferred from a reformate flow (32) downstream from a water-gas shift (38) to both a) a combustor feed flow (40) that is supplied to a combustor (25); and b) a water flow (26) that is supplied to a reformer feed mix (34) for a steam reformer (28).
摘要:
An integrated fuel cell unit (10) includes an annular array (12) of fuel cell stacks (14), an annular cathode recuperator (20), an annular anode recuperator (22), a reformer (24), and an anode exhaust cooler (26), all integrated within a common housing structure (28).
摘要:
An integrated autothermal reformer/recuperator unit (10) is provided for reforming a feed gas flow to produce a reformate flow. The unit (10) includes a cylindrical housing (18) having a feed gas inlet (26) and a reformate flow outlet (32) located adjacent a first end (20) of the cylindrical housing (18). An autothermal reformer catalyst structure (12) is located in the housing and spaced from the first end, and a recuperator heat exchanger (16) is located in the housing (18) between the first end (20) and the catalyst structure (12).
摘要:
A combustor preheater (94) is provided for use in a fuel processor (20) to preheat a combustor feed (40) by transferring heat from a post water-gas shift reformate flow (32) to the combustor feed (40). The combustor preheater (94) includes a housing (92) defining first and second axially extending, concentric annular passages in heat transfer relation to each other; a first convoluted fin (96) located in the first passage to direct the post water-gas shift reformate flow (32) therethrough and a second convoluted fin (98) located in the second passage to direct the combustor feed therethrough.
摘要:
A recuperative heat exchanger (36) is provided for use in a fuel processor (20), the heat exchanger (36) transferring heat from a fluid flow (34) at one stage of a fuel processing operation to the fluid flow (32) at another stage of the fuel processing operation. The heat exchanger (36) includes a housing (56) defining first and second axially extending, concentric annular passages in heat transfer relation to each other; a first convoluted fin (70) located in the first passage to direct the fluid flow therethrough; and a second convoluted fin (72) located in the second passage to direct the fluid flow therethrough.
摘要:
A fuel cell system (1) is provided and includes a fuel cell stack (3) and a heat transfer device (5) adapted to transfer heat from a cathode exhaust stream of the fuel cell stack (3) to water to be provided to a fuel inlet stream.
摘要:
A reformate cooling system is provided for use in a fuel processing subsystem including a process water flow that supplies water to a fuel flow at various locations in the fuel processing subsystem. The reformate cooling system includes a heat exchanger capable of completely vaporizing a portion of the process water flow while bringing the reformate and the portion of the process water flow to a common exit temperature. The common exit temperature is dynamically controllable to a desired temperature range for optimal removal of carbon monoxide from the reformate flow. The portion of the process water flow is recombined with a remainder of the process water to be utilized as steam and/or water in the fuel processing subsystem.
摘要:
A vaporizing heat exchanger (10, 68) is provided for vaporizing a fluid flow using a thermal energy containing flow. Flow paths (24, 26, 28) for each of the fluid flow and the thermal energy containing flow are located relative to each other such that the fluid flow makes multiple passes wherein the fluid is vaporized and subsequently superheated.