Metering of Gas Flows in Power to Gas Plants

Dr. Klaus Steiner, Dieter Wolf, Dr. Manfred Hoppe and Dr. Detlef Vieth*

E.ON Technologies GmbH, *pigsarTM

IGRC 2014, Copenhagen, Sept. 17-19, 2014

Quantifying of Flows and Qualities in Gas Grids

CO2

Natural Gas

H2 Enriched

Natural Gases

H2

SNG

Biogas

Metering of process parameters for control of gas infrastructures

Custody transfer and fiscal metering

Transmission & distribution of natural gases and renewables gases

E.ON´s Power to Gas Pilot Plant Falkenhagen

Specifications

Objectives Demonstration of process chain

Optimisation of operations

(wind power fluctuations and injection)

Utilisation of wind power for H2

production

Gain deeper insights into technology,

cost & authority approval from the

experience

Rated load: 2 MWel

H2 generation: 360 m³/h

Injection into regional natural gas network

Commissioning June 10th, 2013

In cooperation with

Rated Load: 1 MWel (PEM Stack)

H2 generation: 265 m³/h

Injection into regional natural gas grid

Commissioning 1st quarter 2015

Project period: 3 years

Project costs: 13,5 Mio. €

Subsidies by German Fed. Governm.

Specifications

E.ON´s Power to Gas Plant Hamburg-Reitbrook

Engineering & operation of next

generation electrolysis technology

Plant integration into E.ON´s gas

infrastructure, field test and trial

Developing a business model

Objectives Cooperation Partners

PEM Elektrolysis

Transformer

Visitor Centre

Metering & Injection

Station

Instrumentation &

Control

Gas flow meter

V

Valuation of Injected H2 Energy Flow (Fiscal Metering)

T p

Gas law deviation factor (compressibility acc. to AGA8-DC92)

ISO 6976 H2 calorific value HSH2

nb

bnbn

pT

pT

KVV

1

E = Vn · HsH2 Energy quantity

Gas meter

pTfZ

ZK

n

H ,2

Volume conversion of uncorrected volume to volume at standard conditions (PTZ correction)

Standard conditions: Tn = 0°C; pn = 1,01325 bar

PTZ correction & data logger

Image source: RMG

0

50

100

150

200

250

300

1 11 21 31 41

H2 F

low

[N

m³/

h]

1.12., 23:00 pm 30.11., 0:00 am

10 20 30 40

H2

Gas Quality

Elektrolysis

Fiscal Meter

@ appr. 10barg

SAE

Compressor

Coriolis

Meter

@ appr. 48barg

Injection Point

H2 Pipeline

Station Section Monitoring: e.g.: Compressor Unit

Power to Gas Station

Deployment of commercially

available MID meters

Specification of metering station

compliant to network access agreement

Natural Gas Pipeline

Fiscal Meter

@ appr. 10barg

Coriolis

Meter

@ appr. 48barg

Point of Contact Metering of H2 Enriched Natural Gases

Insignificant impact on meter accuracy up to 10% H2 content

Process gas chromatographs to determine H2 content of natural gases

commercially available

Ultrasonic Meter

-2,0

-1,5

-1,0

-0,5

0,0

0,5

1,0

1,5

2,0

0 20 40 60 80 100 120 140 160

Total Flow Q B [m³/h]

Me

ter

Ac

cu

rac

y [

%]

Basis 30bar 0% H2 2,5% H2

5% H2 7,5% H2 10% H2

Turbine Meter

-2,0

-1,5

-1,0

-0,5

0,0

0,5

1,0

1,5

2,0

0 20 40 60 80 100 120 140 160

Total Flow Q B [m³/h]

Me

ter

Ac

cu

rac

y [

%]

Basis 30bar 0% H2 2,5% H2

5% H2 7,5% H2 10% H2

pigsarTM Measurement Standard SN 10508684 Turbine Meter

-2,5

-2,0

-1,5

-1,0

-0,5

0,0

0,5

1,0

1,5

2,0

2,5

0 200 400 600 800 1000 1200 1400 1600 1800 2000

Flowrate [m³/h]

Err

or

[%

]

pigsar 30.09.2011 25 bar

Terasen CO2

4.8 bar

Terasen CO2

16.5 bar

pigsar 05.12.2011 25 bar

pigsarTM Measurement Standard SN 10508684 Turbine Meter

-1,5

-1,0

-0,5

0,0

0,5

1,0

1,5

2,0

2,5

10.000 100.000 1.000.000 10.000.000 Reynolds Number (Re)

Err

or

[%

]

pigsar 30.09.2011 25 bar Terasen CO2

4.8 bar

Terasen CO2

16.6 bar

pigsar 05.12.2011 25 bar Air Silvolde 2007

PTB-2008- package

Metering of CO2, Natural Gas & Air with a Turbine Meter

Commercially available natural gas turbine meters can be deployed for

metering of gaseous CO2, natural gas & air flows at high pressures

Thank you for your attention!

Contact:

Dr. Klaus Steiner

E.ON Technologies GmbH

klaus.steiner@eon.com

Metering of Gas Flows in Power to Gas Plants