天然气水合物开采平台能量系统优化

doi:10.16085/j.issn.1000-6613.2021-2114

摘要/Abstract

摘要：

随着世界各国对能源需求量的不断增加，急需新型能源来补充常规化石燃料的供给，天然气水合物因其分布广泛、能量密度高等特点或将成为未来主要替代能源之一。CO₂置换开采相对于其他方法可以将温室气体CO₂封存于海底，环境效益更加明显；其次天然气水合物海上开采平台通常兼具生产和生活为一体，采用经济合理的能量设备运行方案可以有效降低平台运行成本，提高经济效益。如今随着海上风电的不断开发，将海上风力发电引入海上平台的能量系统引起了越来越多的关注。本文以天然气水合物开采平台耦合甲烷重整装置的能量系统为例，以最低年总成本为目标函数建立新的能量系统优化模型，分别模拟无风能接入和有风能接入的分布式能量系统，采用MATLAB建模，利用商业求解器GUROBI进行求解，得到最佳设备运行方案，并对有风能接入的能量系统运行方案进行详细的分析。结果显示接入风能后系统的年总成本降低了21.92%，天然气消耗量降低35.41%。此外，通过灵敏度分析发现风能的最佳占比受天然气价格的影响，基于我国当前的天然气的价格，风能的最佳比例为49.56%，随着天然气价格的增加，风能的占比逐渐增大。

关键词: 天然气水合物, 海上平台, 风力发电, 分布式能源系统

Abstract:

With the increasing demand for energy in various countries around the world, new types of energy are urgently needed to supplement the supply of conventional fossil fuels. Natural gas hydrate may become the main alternative energy source in the future due to its wide distribution and high energy density. Compared with traditional mining methods, CO₂ replacement mining can store the greenhouse gas CO₂ on the seabed, and the environmental benefits are more obvious; secondly, and for a natural gas hydrate offshore mining platform, the use of economical and reasonable energy equipment operation schemes can effectively reduce operating cost and improves economic benefits. Nowadays, with the continuous development of offshore wind power, the introduction of offshore wind power into the energy system of offshore platforms has attracted more and more attention. This paper took the energy system of a natural gas hydrate mining platform coupled with a methane reformer as an example. And the lowest total annual cost was set as the objective function to establish a new energy system optimization model under the consideration with and without wind energy access. The commercial solver GUROBI is used to solve the problem. After solving the problem, the best equipment operation plan can be found, and a detailed analysis of the energy system operation plan with wind energy access was conducted. The results showed that the total annual cost of the system after connecting to wind energy was reduced by 21.92%, and the consumption of natural gas was reduced by 35.41%. In addition, through sensitivity analysis, it was found that the optimal proportion of wind energy was affected by the price of natural gas. Based on the price of natural gas currently, the optimal proportion of wind energy was 49.56%. As the price of natural gas increased, the proportion of wind energy gradually increased.

Key words: natural gas hydrate, offshore platform, wind power, distributed energy system

中图分类号:

TQ021

马小娟, 王彧斐, 冯霄. 天然气水合物开采平台能量系统优化[J]. 化工进展, 2022, 41(3): 1667-1676.

MA Xiaojuan, WANG Yufei, FENG Xiao. Energy system optimization of natural gas hydrate mining platform[J]. Chemical Industry and Engineering Progress, 2022, 41(3): 1667-1676.

图/表 16

参考文献 13

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设备	最大容量/kW，kWh，m²	固定成本/CNY	线性容量相关成本/CNY·kW^-1，CNY·kWh^-1，CNY·m^-2	寿命/a	折旧率/%
GT	42000	282597	2150	25	80
WT	480000	38000	3965	20	80
DB	42000	131378	1490	20	80
WB	42000	83541	1560	20	80
COC	42000	116068	1236	25	80
ABC	42000	120585	1893	25	80
BT	6000	9758	1785	20	80
HS	6000	7861	100	20	80
CS	6000	7432	200	20	80

设备	最大容量/kW，kWh，m²	固定成本/CNY	线性容量相关成本/CNY·kW^-1，CNY·kWh^-1，CNY·m^-2	寿命/a	折旧率/%
GT	42000	282597	2150	25	80
WT	480000	38000	3965	20	80
DB	42000	131378	1490	20	80
WB	42000	83541	1560	20	80
COC	42000	116068	1236	25	80
ABC	42000	120585	1893	25	80
BT	6000	9758	1785	20	80
HS	6000	7861	100	20	80
CS	6000	7432	200	20	80

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