FutureGas 2nd Annual meeting WP 1 Gas conditioning and grid operation

Transcription

1 FutureGas 2nd Annual meeting WP 1 Gas conditioning and grid operation Helsingør 27 September 2017 Short status Torben Kvist

2 WP1 Gas conditioning and grid operation Task 1 Technologies for conditioning of renewable gases Task 2 Analysis and lab test Task 3 Options for design and grid operation Task 4 Adjusting grid design and operation VS adjusting quality

3 Task 1 Technologies for conditioning of renewable gases Work conducted Definition of gas quality within scope of FutureGas (coorperation with WP2, WP4) (Reviewed by Energinet,DTU) Upgrading (by DGC, Reviewed by Planenergi, DTU) Methanation (by Planenergi, Reviewed by DGC, DTU)

4 Gases in the scope of FutureGas Gas grid Case1 Natural gas spec Case2 NG + 10% H2 -Wobbe for H gas (*): 45 to 55 MJ/m 3 (15/15) Present range 48,2 to 52,9 MJ/m 3 (15/15) - H type natural gas with variation of H2 up to 10% (vol.) (*) Not known today: Expected max variation (harmonisation process on-going) Specific networks Case3 100% H2 Case4 Not upgraded biogas Case5 Not upgraded syngas - 100% H2 - Definition not crucial as applications compatible with the specific gas qualities - Same as above (*) Other parameters for consideration: MN, composition (eg min value CH4)

5 Methanation Catalytic methanation of biogas Biological methanation of biogas Plant descriptions Haldor Topsøe: Catalytic methanation in Foulum, Denmark Etogas & Audi: Catalytic methanation in Werlte, Germany MeGa-stoRE: Catalytic methanation in Lemvig, Denmark Electrochaea: Biological methanation in Avedøre, Denmark MicrobEnergy & Audi: Biological methanation in Allendorf, Germany

6 Electrochea - biological methanation Avedøre outside Copenhagen

7 Biogas Upgradation Methane can be concentrated to the standards for natural gas. Impurities has negative impact on appliances and network Upgrading technologies Water scrubbing and/or physical absorption, Pressure swing adsorption (PSA) Chemical absorption Membrane separation Biological and Cryogenic technology Figure:-Water Scrubbing (Bauer, SGC 2013)

8 Pros and cons of biogas upgrading technologies

9 Task 2 Analysis and lab test Tomorrow we will present our plan in the WP1 workshop The idea is to focus biological methanation Aryal N., et al., 2017 ( Accepted manuscript in Green Chemistry) Bioelectrochemical reactor

10 Task 3 Options for design and grid operation Distribution of clean but not conditioned RE gas Modifying specs. in existing gas grids -meaning adapting grid and appliences instead of the gas quality Injection RE gas in minor fractions in existing networks Distribution grids Transmission grid Supplying larger individual costumers with RE gas

11 Task 4 Adjustning grid design and operation VS conditioning A case study On-going work Preliminary results

12 Changing gas spec in existing grids Case Jebjerg One distribution grid and one biogas plant Biogas

13 Case: Assumptions Wobbe index requirement is changed from corresponding to natural gas to biogas properities. Eventual surplus of biogas is upgraded, compressed and injected into the 40 bar grid Biogas is supplemented by natural gas / air mixture corresponding biogas quality Appliances are converted to biogas operation FutureGas meeting

14 Supplied lnstallations Installed Number capacity [kw] Agriculture and small companies Domestic cookers Commercial cookers 3 35 Domestic boilers Forced air burner Dryers 3 6 Convective and radiative heaters Gas engines

15 Biogas production and gas consumption Total consumption in the grid m 3 /y The share of biomethane 68% Surplus of biomethane 8,1% Compression m 3 /y Compression 2553 h/y

16 Cost estimation (tentative data) Period: 10 years, (boilers: 22 years) Biogas Upgrading Interest 4 % Low/flaring High High/flaring Houseshold boilers, CAPEX Gas engines modifications, CAPEX Forced air burners CAPEX Biogas upgradering, CAPEX Biogas upgradering, OPEX Heaters and radiators Meters Sulphur removal Pressurizing 4bar, CAPEX Pressurizing 4bar, OPEX Pressurizing surplus biomethane 40bar, CAPEX Flaring, (mainly energy lost) TOTAL [k /y ] TOTAL specific cost [ /m3(n) biomethane] 0,13 0,21 0,19 0,11

17 Thank you for the attention Questions?