Securing a sustainable use of bioenergy by utilising hydrogen and CAES for electricity production
Authors
Espersen, Kristina Ifversen ; Hansen, Mikkel Kamp
Term
4. Term
Publication year
2021
Submitted on
2021-06-04
Pages
96
Abstract
Denne undersøgelse ser på, om grøn brint i samspil med CAES (komprimeret luft-energilagring) kan erstatte biomassebaserede, regulerbare elenheder i Danmark og dermed holde bioenergiforbruget på et bæredygtigt niveau. CAES lagrer energi ved at komprimere luft og frigiver den igen for at producere elektricitet; i dette koncept leverer grøn brint (fremstillet med vedvarende el) den brændsel eller varme, der skal til for at producere strøm. Studiet bygger på viden om afhængighed af bioenergi og lock-in-mekanismer, som hæmmer indføringen af alternativer. Der anvendes en energisystemanalyse og simulationer til at estimere, hvor meget elektricitet et hydrogen-CAES-system kan levere, hvor meget bioenergi der kan fortrænges, og hvilke indtægter driften potentielt kan give. Med de anvendte forudsætninger viser simulationerne, at Green Hydrogen Hub kan producere 1,04 TWh elektricitet om året. Denne produktion kan helt eller delvist erstatte biomassebaseret elproduktion og dermed reducere Danmarks afhængighed af bioenergi.
This study examines whether green hydrogen used with compressed air energy storage (CAES) can replace biomass-based, dispatchable power units in Denmark and keep bioenergy use at a sustainable level. CAES stores energy by compressing air and later releasing it to generate electricity; in this concept, green hydrogen (produced from renewable electricity) provides the fuel or heat needed for power production. The study draws on knowledge about bioenergy dependence and lock-in mechanisms that slow the adoption of alternatives. It uses an energy system analysis and simulations to estimate how much electricity a hydrogen-CAES system could deliver, how much bioenergy it could displace, and the potential revenue from operating the system. Under the assumptions applied, the simulations indicate that the Green Hydrogen Hub could produce 1.04 TWh of electricity per year. This output could be used to substitute some biomass-based electricity generation and thereby reduce Denmark's reliance on bioenergy.
[This summary has been rewritten with the help of AI based on the project's original abstract]
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