Abstract:

To address the future demand for hydrogen transportation within natural gas pipeline networks, it is essential to conduct economic research that integrates the operational characteristics of hydrogen-blended natural gas pipelines. This study investigates the operational characteristics and economic performance of such pipelines under multiple modes and factors. Steady-state simulations are coupled with economic indicators, including net present value and rate of return, to evaluate the economic viability of two hydrogen delivery modes. One mode is direct hydrogen blending, and the other is hydrogen separation followed by sales. Both modes are examined under two throughput conditions, namely a constant standard volumetric flow rate and a constant total heating value. Results show that the pressure drop decreases as the hydrogen blending ratio increases under the constant standard volumetric flow condition, whereas it increases under the constant total heating value condition. Meanwhile, the standard volume and total heating value of the pipeline inventory decrease under both conditions. The rate of return under the constant total heating value condition is superior to that under the constant standard volumetric flow condition, and the hydrogen separation and sales mode outperforms the direct blending mode economically. The upstream-downstream hydrogen price differential significantly impacts the profitability of pipeline hydrogen blending. Under the constant total heating value condition, the system exhibits greater tolerance to hydrogen price volatility. In the planning of hydrogen-blended natural gas pipelines, the two operating conditions (constant standard volumetric flow rate and constant total heating value) and the two operational modes (direct blending via an open service platform, and hydrogen separation and sales from an independent operator perspective) can all serve as useful references for designing operational schemes for hydrogen-blended transmission pipelines.

Key words: hydrogen-blended natural gas pipelines, simulation, operational characteristics, economic, throughput conditions

摘要：

面向天然气管网掺氢输送的后续需求，开展耦合掺氢天然气管道运行特性的经济性具有重要研究意义，本文开展了多模式多因素下掺氢天然气管道运行特性与经济性研究分析。耦合掺氢天然气管道运行特性稳态仿真，以净现值、收益率为参数，探讨分析了掺氢直供/氢气分离销售方式、同等标况体积及同等总发热量输量工况的掺氢天然气管道运行经济性。伴随掺氢比的增加，本研究算例在同等标况体积输量工况下压降降低，同等总发热量输量工况下压降增加，两种工况的管存气体标准体积和管存气体总热值都随之减小；同等总发热量输量工况下的收益率呈现优于同等标况体积输量工况的特点，且氢气分离销售方式的经济性相较直供方式更优；上下游氢气价格差对管道掺氢输送的收益率影响显著，同等总发热量输量工况对氢气差价波动的容忍度更高。在天然气管道掺氢输送规划中，同等标况体积输量工况、同等总发热量输量工况以及开放服务平台的掺氢直供模式、独立运营视角下的氢气分离销售模式均可作为掺氢输送管道运行方案的参考。

关键词: 掺氢天然气管道, 仿真, 运行特性, 经济性, 输量工况

CLC Number: 

• TE832

• P618.13