承诺到2030年使用20%的可再生天然气,为天然气主管工程和农业部门创造了机会,伊恩·基尔加伦写道
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承诺到2030年使用20%的可再生天然气,这是爱尔兰天然气网络支持的目标,为天然气主管工程和农业部门创造了机会。

农场可再生气体系统示意图

超过90%的数字预计来自沼气资源,是本文的主要重点,but other renewable gas developments include synthetic gas and green hydrogen (referred to as power-to-gas),both of which are in earlier stages of development.

Generated through process of anaerobic digestion


Renewable gas is generated principally through a process called anaerobic digestion (AD).In order to make the gas,原料,如动物泥浆,农业残留物,break/catch crops,青贮饲料,and food industry wastes are heated and agitated in an oxygen-free environment to produce biogas,生物肥料和二氧化碳。

这一过程消除了原本会进入大气(甲烷,二氧化碳H2S) and has three primary outputs and is illustrated above:
•沼气被净化以产生生物甲烷,与天然气相同。这就用碳中性气体取代了天然气供应;;
•生物肥料保留来自原料的所有营养素,并在土地扩张中完全吸收。这就消除了目前土地扩张实践中的温室气体排放,因为只有10%到20%的营养被吸收,也取代了进口的化石人工肥料。Air and water quality are also significantly improved in this process,以及土地生产力;;
• The CO2 can be processed to different grades for use in industry or horticulture,取代化石能源产生的二氧化碳排放。

为实现2030年的目标,GNI设想了400个基于农场的广告和50个更大的广告配置用于共同消化食品工业废物。沼气处理将在每个广告设施或团体计划现场进行,188betsport气体净化后储存在经ADR认证的拖车装置上,用于收集和输送至燃气管网上的燃气入口枢纽。

天然气网络枢纽将促进大集水区的广告开发。


An example of these trailer units is shown in the main picture.These gas network hubs will facilitate AD development in large catchment areas and GNI aims to commission one facility every nine months,今年4月,第一套设备将在科基尔代尔投入使用。

This first project is co-funded by the EU connecting Europe facility,GNI and Green Generation,是堤道工程的一部分,其中还包括14个公众可进入的CNG加油站。该网站的第一个广告设施将是绿色一代在纽尼的现有单位,基尔代尔。

GNI and Green Generation are engaged with several other AD developers in the catchment area to utilise the hub facility which has a capacity to supply two per cent of the residential heat market or 600 CNG buses.

Hectare grass to gas delivers energy for nine houses versus just four houses with willow??

使用ADR认证拖车


The use of ADR certified trailers for storing and moving gas by road represents the most efficient means of conveying the gas to the gas network and consumer.对在天然气管网上建设大型广告设施的另一种替代方案进行了评估,发现其成本更高。and would have required excessive vehicle movements.

移动能源密集型天然气有更大的财务和运营意义,这是一个更适合农业部门的模式,与乳脂收集模式没有太大的不同。与公路运输固体生物质燃料相比,复合气体拖车比木质生物质拖车轻得多,紧凑得多,道路行驶量约为移动固体燃料所需量的四分之一。

在这个示范项目之后,GNI正与Ballyhoura Development and Renewable Gas Forum Ireland(RGFI)合作进行下一个项目,该项目将是一个规模更大的展示项目,其集水区覆盖东科克-蒂佩里-利默里克。This hub facility will accommodate 30 AD facilities or more,and currently the project has engaged 14 initial farmer developers.

AD facilities can be easily understood and managed by farmers.The on-site gas purification facilities require gas engineering competency,为工程师提供机会,该领域的技术人员和服务提供商。

鼓励有兴趣获得信息或获得该领域项目机会的各方加入RGFI,网址为www.renewablegasforum.com。RGFI每月在Portlaoise召开会议,并为其成员组织定期讲习班和培训支持服务,主题包括安全评估,沼气原料和广告运营最佳实践,certification compliance,等。

RGFI隶属于欧洲沼气协会(EBA)和欧洲可再生气体登记局(ERGAR)。

市场与应用


天然气网络使可再生天然气进入近700个现成市场,000 consumers in Ireland across the three main sectors of heat,发电,和运输。The gas network is 100 per cent efficient in conveying gas from source to consumer and is also an energy store,在有天然气的地方,可按需发送。

This is a key 188bet亚洲体育feature that distinguishes it from the electricity network which cannot store energy.爱尔兰的天然气网络的储存容量远远超过一百万特斯拉的电力墙。

燃气是最有效的燃料,用于供热和热电联产(CHP)应用,and is also the most efficient fuel for central electricity generation,so renewable gas is a competitive alternative for decarbonising both applications.

Much focus of national policy has been to decarbonise central power generation with solid biomass from short rotation crops such as Willow.第二个例子强调,柳树(或其他用于燃料应用的造林)的效率远远低于用青贮草生产可再生气体的效率,其年能源产值比柳树高出50%以上。

Double the efficiency of solid fuel power generation


Added to this,existing national combined cycle gas turbine (CCGT) power plants are nearly double the efficiency of solid fuel power generation.这意味着,一半的土地利用可以提供两倍以上的能源。

Given also that Irish farmers are all experienced grassland farmers,与林业永久性变化相比,输出草料青贮饲料无需任何变化,后者将产生较低的产量和收入。

The carbon lifecycle for grass to gas is also a matter of months,whereas wood biomass is a matter of years (minimum four years,and up to 75 years) and wood biomass also has significant carbon and harmful particulate matter emissions not present in gas burning applications.

For transport applications,可再生天然气的生产和上市价格低于同等柴油价格。在这个市场发展之前,这是一个未来的增长领域,而不是当前的市场。

Author: Ian Kilgallon is business development manager,爱尔兰天然气网络。在天然气行业14年多的时间里,他曾担任国家计量经理职务;market operations manager;regulatory affairs and key account manager.在那之前,he spent 18 years establishing and supporting manufacturing operations across Europe,亚洲和北美的苹果,EMC和戴尔。

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A commitment to 20 per cent use of renewable gas by 2030 - a target that Gas Networks Ireland supports - throws up an opportunity for gas-competent engineering and agri-sector.A figure greater than 90 per cent of this is projected to be from biogas resources and is the main focus...