Thepracticeofblendingbiogasintothegasnetwork,especiallyatthedistributionlevel,offerstheopportunityto usebiogasasasubstituteoffossilgas.The‘greening’ofthegasnetworkthroughbiogasblendingwouldindeed takeadvantageoftherobustnessandextensivenessofanalreadyexistingenergyinfrastructure.Asteadystate and multi-component thermal-fluid-dynamic model of the gas network is applied to a portion of the Italian distributionnetwork.Thereceivingpotentialcapacityoftheexistinginfrastructureisassessedwithrespectto biogasinjection.Fluid-dynamicaspectsofthispracticeareconsideredandcommented.Themaximumallowable percentage ofinjectable biogas(purifiedfrom sulphurcompounds,O2 andsiloxanesbut notupgradedto biomethanebyremovingCO2)iscalculatedonanodalbasis,referringtotheactualgasnetworkconfiguration,and in agreement with the quality constraints set by the current regulation (UNI/TR 11537:2016). A major hypothesishasbeenassumedinthiswork:gasqualityrequirementsareenforcedonthenetworkasawhole(i.e., after blending the injected gas into grid) rather than at the injection point, which is instead the current prescriptionofmostoftheEUcountries.Byexploitingthequality-trackingfeatureofthemodel,theconstrainton the quality assessment at the injection point is thus relaxed and its effect on the grid gas quality has been quantified.Resultsfromthecasestudyshowshowbiogasblendingintothegasgridmayleadtoareductionon thefossilnaturalgasdependenceofupto4.7%.

Biogas blending into the gas grid of a small municipality for the decarbonization of the heating sector / Cavana, M.; Leone, P.. - In: BIOMASS & BIOENERGY. - ISSN 0961-9534. - 127:105295(2019). [10.1016/j.biombioe.2019.105295]

Biogas blending into the gas grid of a small municipality for the decarbonization of the heating sector

Cavana M.;Leone P.
2019

Abstract

Thepracticeofblendingbiogasintothegasnetwork,especiallyatthedistributionlevel,offerstheopportunityto usebiogasasasubstituteoffossilgas.The‘greening’ofthegasnetworkthroughbiogasblendingwouldindeed takeadvantageoftherobustnessandextensivenessofanalreadyexistingenergyinfrastructure.Asteadystate and multi-component thermal-fluid-dynamic model of the gas network is applied to a portion of the Italian distributionnetwork.Thereceivingpotentialcapacityoftheexistinginfrastructureisassessedwithrespectto biogasinjection.Fluid-dynamicaspectsofthispracticeareconsideredandcommented.Themaximumallowable percentage ofinjectable biogas(purifiedfrom sulphurcompounds,O2 andsiloxanesbut notupgradedto biomethanebyremovingCO2)iscalculatedonanodalbasis,referringtotheactualgasnetworkconfiguration,and in agreement with the quality constraints set by the current regulation (UNI/TR 11537:2016). A major hypothesishasbeenassumedinthiswork:gasqualityrequirementsareenforcedonthenetworkasawhole(i.e., after blending the injected gas into grid) rather than at the injection point, which is instead the current prescriptionofmostoftheEUcountries.Byexploitingthequality-trackingfeatureofthemodel,theconstrainton the quality assessment at the injection point is thus relaxed and its effect on the grid gas quality has been quantified.Resultsfromthecasestudyshowshowbiogasblendingintothegasgridmayleadtoareductionon thefossilnaturalgasdependenceofupto4.7%.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/2748641
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