US 12,215,921 B2
Photoelectric hydrogen production energy storage and cold energy recovery coupled dry ice production device and use method
Yisong Han, Hangzhou (CN); Fang Tan, Hangzhou (CN); Xudong Peng, Hangzhou (CN); Lei Yao, Hangzhou (CN); Liangying Li, Hangzhou (CN); and Jiawei Wang, Hangzhou (CN)
Assigned to HANGZHOU OXYGEN PLANT GROUP CO., LTD., Hangzhou (CN)
Filed by HANGZHOU OXYGEN PLANT GROUP CO., LTD., Hangzhou (CN)
Filed on Jan. 13, 2023, as Appl. No. 18/154,040.
Claims priority of application No. 202210046797.3 (CN), filed on Jan. 17, 2022.
Prior Publication US 2023/0228485 A1, Jul. 20, 2023
Int. Cl. F25J 1/00 (2006.01); F25J 1/02 (2006.01)
CPC F25J 1/001 (2013.01) [F25J 1/0027 (2013.01); F25J 1/0072 (2013.01); F25J 1/0234 (2013.01); F25J 1/0257 (2013.01); F25J 2215/10 (2013.01); F25J 2215/80 (2013.01); F25J 2260/20 (2013.01); F25J 2260/30 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A photoelectric hydrogen production energy storage and cold energy recovery coupled dry ice production device, which comprises a photoelectric conversion liquid hydrogen energy storage unit and a dry ice production unit with optimized recovery of liquid hydrogen cold energy, wherein the photoelectric conversion liquid hydrogen energy storage unit and the dry ice production unit with optimized recovery of liquid hydrogen cold energy share a hydrogen-carbon dioxide heat exchanger II (13), a hydrogen-nitrogen heat exchanger (7) and a hydrogen-carbon dioxide heat exchanger I (11), wherein the photoelectric conversion liquid hydrogen energy storage unit is further provided with a hydrogen liquefaction unit (4), an air separation device (9) and a liquid nitrogen storage tank (8), the liquid nitrogen storage tank (8) is connected with the hydrogen liquefaction unit (4), the hydrogen liquefaction unit (4) is connected with a low-temperature liquid hydrogen storage tank (5) through a liquid hydrogen pipeline (3), hydrogen prepared by photovoltaic power generation is refrigerated and liquefied by self-expansion after exchanging heat with liquid nitrogen from the liquid nitrogen storage tank (8) in the hydrogen liquefaction unit (4), and is sent to the low-temperature liquid hydrogen storage tank (5) through the liquid hydrogen pipeline (3) for storage, the process of photoelectric conversion of liquid hydrogen is completed, the low-temperature liquid hydrogen storage tank (5) is connected to the hydrogen-nitrogen heat exchanger (7), the hydrogen-carbon dioxide heat exchanger I (11) and the hydrogen-carbon dioxide heat exchanger II (13) in sequence, a low-temperature liquid hydrogen pump (6) is provided between the low-temperature liquid hydrogen storage tank (5) and the hydrogen-nitrogen heat exchanger (7), the air separation device (9) is connected to the hydrogen-carbon dioxide heat exchanger I (11) and the hydrogen-nitrogen heat exchanger (7) through a nitrogen pipeline (10) in sequence, and finally the product liquid nitrogen is stored in the liquid nitrogen storage tank (8) for recycling.