STUDY ON SOFC-GT-KC HYBRID POWER SYSTEM WITH HIGH TEMPERATURE SOLAR THERMOCHEMISTRY AND METHANE COMPLEMENTARY

Wang Qiushi; Jiang Xiaofu; Duan Liqiang; Zheng Hongxu; Lu Ziyi

doi:10.19912/j.0254-0096.tynxb.2022-1013

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (10) : 218-228. DOI: 10.19912/j.0254-0096.tynxb.2022-1013

STUDY ON SOFC-GT-KC HYBRID POWER SYSTEM WITH HIGH TEMPERATURE SOLAR THERMOCHEMISTRY AND METHANE COMPLEMENTARY

Wang Qiushi¹, Jiang Xiaofu², Duan Liqiang¹, Zheng Hongxu², Lu Ziyi¹

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Abstract

A new high temperature solar thermochemistry and methane complementary solid oxide fuel cell-gas turbine-Kalina cycle （SOFC-GT-KC） hybrid power system is proposed in this paper, which uses high temperature solar energy to drive methane reforming to produce hydrogen, converts solar energy into chemical energy of hydrogen-rich fuel syngas, and realizes the conversion and storage of solar energy. The SOFC-GT-KC system generates electricity using the produced hydrogen, achieving the energy cascade utilization. This study explores the operating characteristics of the new system on typical days in various seasons, evaluates the influences of key factors on the new system performance, and proposes different operation strategies. The results show that under the design conditions, the electricity efficiency and exergy efficiency of the new system are 62.28% and 64.92%, respectively. Compared with the reference SOFC-GT-KC system without integrating with solar thermochemical process under the same conditions, the output power of the new system is increased by 31.90% and the exergy efficiency is increased by 2.77 percentage points. Under design conditions, with the same electric power output, the new system saves 29.6% fossil fuel than that of the reference system.

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solar energy / hydrogen production / thermochemical energy storage / fuel cell / cascade utilization

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Wang Qiushi, Jiang Xiaofu, Duan Liqiang, Zheng Hongxu, Lu Ziyi. STUDY ON SOFC-GT-KC HYBRID POWER SYSTEM WITH HIGH TEMPERATURE SOLAR THERMOCHEMISTRY AND METHANE COMPLEMENTARY[J]. Acta Energiae Solaris Sinica. 2023, 44(10): 218-228 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1013

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