Design and optimization of offshore ship-based natural gas storage technologies in the South China Sea

China's second offshore natural gas hydrate production reveals the urgency and potential demand for ship-based gas storage and transportation technology. Three possible gas storage processes including hydrate-based natural gas (HNG), pressurized liquefied natural gas (PLNG), and compressed natu...

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Bibliographic Details
Published in:Energy Conversion and Management
Main Authors: Fan, Shuanshi, Wang, Yan, Wang, Yanhong, Lang, Xuemei, Wang, Shenglong
Format: Report
Language:English
Published: PERGAMON-ELSEVIER SCIENCE LTD 2021
Subjects:
Hydrate
Natural gas
Storage
Optimization
Energy consumption
Economic analysis
METHANE HYDRATE
SIMULATION
COST
DEPRESSURIZATION
Thermodynamics
Energy & Fuels
Mechanics
Methane hydrate
Online Access:http://ir.giec.ac.cn/handle/344007/33297
https://doi.org/10.1016/j.enconman.2021.114218
Description
Summary:China's second offshore natural gas hydrate production reveals the urgency and potential demand for ship-based gas storage and transportation technology. Three possible gas storage processes including hydrate-based natural gas (HNG), pressurized liquefied natural gas (PLNG), and compressed natural gas (CNG) processes were simulated and optimized from aspects of specific energy consumption (SPC), exergy efficiency, equipment weight, and capital expenditure (CAPEX) respectively. The SPC of HNG, PLNG, and CNG was 0.22, 0.48, and 0.24 kW h kg-1 respectively. While the CAPEX of HNG, PLNG, and CNG for gas storage production was 363.3, 405.0, and 384.8 103 US Dollars respectively. And HNG showed a payback period of 1 year in the evaluation of natural gas value chain. The comparison results indicate that HNG has low SPC, CAPEX, equipment weight, and short payback period but high exergy efficiency among the three processes, which provides a promising offshore ship-based gas storage process to offshore small-scale natural gas production.

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