Fuel cell-based distributed energy system using liquefied natural gas as feedstock
A liquefied natural gas and distributed energy technology, applied in fuel cells, fuel cell additives, circuits, etc., can solve problems such as energy waste and cold pollution, achieve high controllability and flexibility, low pollution, and full utilization Effect
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[0070] Example one
[0071] image 3 It is a schematic structural diagram of a fuel cell-based distributed energy system using liquefied natural gas as a raw material provided by an embodiment of the present invention. Such as image 3 As shown, this embodiment provides a fuel cell-based distributed energy system using liquefied natural gas as a raw material, including a solid oxide fuel cell subsystem, a steam injection gas turbine subsystem, and a liquefied natural gas refrigeration subsystem:
[0072] The solid oxide fuel cell subsystem includes a solid oxide fuel cell stack (not shown), a fuel compressor 120, a pre-reformer 130, a preheater 140, and an afterburner 150. The solid oxide fuel cell stack includes multiple A solid oxide fuel cell 110. The solid oxide fuel cell 110 has a cathode inlet and an anode inlet for oxidizing gas and fuel gas respectively, and a cathode outlet and an anode outlet for discharging cathode tail gas and anode tail gas respectively;
[0073] The ...
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[0114] Example two
[0115] The distributed energy system in the first embodiment is used for energy utilization. The main simulation conditions of the distributed energy system under specific working conditions are shown in Table 1, and the corresponding energy balance table is shown in Table 2; The balance sheet is shown in Table 3.
[0116] Table 1 Energy system simulation conditions
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[0118] Table 2 System Energy Balance Sheet
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[0120]
[0121] Table 3 System Balance sheet
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[0123]
[0124] The calculation results in the above table show that under the design conditions, the total electrical efficiency, total thermal efficiency and total thermal efficiency of the distributed energy system The efficiencies are 57.08%, 72.77%, and 61.9%, and liquid CO with a temperature of -69°C and a pressure of 0.3MPa is recovered. 2 The mass flow rate is 12.46kmol / h.
[0125] It can be seen that the SOFC-STIG new distributed energy system using LNG as fuel proposed by t...
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