Reykjavik, Iceland:

A Hydrogen CityGroup I – Joshua Markle, Adrian Evans,

Calbert Chuderewicz, David Church

Table of ContentsI. Description of Task

II. Researching the Process from Start to Finish

III. Brainstorming and Analysis

IV. The Finished Product and Solution

V. Cost Analysis

VI. Summary and Questions

A New System Must be

Designed.The city of Reykjavik, Iceland has converted to only hydrogen to power the entire city.

All of their cars are now powered by hydrogen fuel cells.

The goal is to design Reykjavik’s transportation system using hydrogen produced by 100% renewable resources.

Our Mission is…Design Goals

To design a renewable hydrogen fueling station that can be replicated and will be able to sustain a city’s transportation system.

Key Business Goals

Sell hydrogen at a price of less than $5.00 per kg.

Stations will dispense hydrogen at 350 and 700 BAR and HCNG blend at 250 BAR.

Total costs < Total Revenue over the span of 10 years.

Primary Market

Motor vehicle users in the city of Reykjavik.

Companies operating commercial vehicles and public transportation systems.

Secondary Markets

Casual Consumers

Assumptions

Hydrogen/ HCNG cars and commercial vehicles will be available and affordable at the time of installation.

Cars will achieve 60 miles / kg of hydrogen, with a tank size of 5 kg.

Stakeholders

Car Manufacturers, Air Products, Customer, Retailer, Production of Renewable Energy, Sales Force, Maintenance Force, Transportation Force, Contractors for Construction, Fabrication/Manufacture

This is the Ideal System.

The goal is to design a standardized fueling station that can be used throughout Reykjavik’s transportation network.

The production process for hydrogen and methane will use 100% renewable resources.

There will be no waste put into the environment (CO2, NOx , CFCs, etc.)

The station will be able to refuel individual cars in 5 minutes, even at peak traffic times.

The Capital City of Iceland

Reykjavik City Population 118,000

3rd highest per capita car ownership with 658 cars per every 1000 people.

Reykjavik area: 106 square miles

80% hydroelectric power is used for grid electricity. The remaining 20% is supplemented by geothermal and other renewable resources.

Iceland has the most untapped high temperature reservoirs of any developed country (great potential for Geothermal energy).

Both Hydrogen and HCNG Blend will be

Distributed.Hydrogen (H2)Most abundant element in the universe.

Does not exist by itself in nature; always grouped with other elements/compounds (H2O).

High energy content per weight, but low energy content per volume.

Used in fuel cells, where it bonds with oxygen to produce electricity that powers the car.

HCNG – Hydrogen-Compressed Natural GasConsists of up to a 30/70 blend of H2 to CNG.

Greatly reduces CO2 and NOx emissions compared to CNG.

Will be used to power commercial vehicles and public transportation buses.

Hydrogen’s Danger is

Misunderstood. Hydrogen is perceived as more dangerous than petrol, it but has some safety advantages.

It is 14x lighter than air and therefore diffuses very fast.

Very hard to ignite

Safer in open areas (after-crash situations)

It is more dangerous to store in enclosed spaces, emergency venting is a necessary safety precaution

There are Many Renewable Options to Power

Electrolysis, Few are Viable.Solar Power

Not viable in Iceland due to the short and dark winter days.

WindNo established system in Iceland, disrupts natural habitats. Against Elf superstition.

Hydro-Electric80% of Iceland’s energy consumption is provided for by hydro-electric. However, its potential is being maxed out and it too disrupts natural eco-system habitats.

Geothermal Iceland is the most promising country for geothermal energy

Geothermal Energy is the Best Option.

Iceland is the world’s leader is geothermal energy.

Most high temperature and pressure reservoirs per square kilometer in the world

Produce a surplus of geothermal energy yearly.

Already use the surplus energy for small scale hydrocarbon replacement.

Plans are in motion to build as many as 11 additional power plants

100% sustainable and renewable energy.

Less disruption of eco-system habitats.

Biogas is the Best Way to Produce Methane for

HCNG Blends.Iceland already has Biogas network in place to fuel their methane powered cars.

Excrements would be gathered from farms and taken to centralized Biogas production plant.

Farms are very close due to Iceland's small size, transportation would fairly energy efficient.

It is estimated that production 30,000 Nm³/ year will be possible in the coming years.

More than enough for commercial HCNG blends

There Are Many Options in Hydrogen Production

TechniquesSteam Methane Reforming (SMR)

Produces hydrogen from existing fossil fuels.

Releases syngas (CO) and CO2 into the atmosphere.

Not environmentally sustainable.

Phototrophic Bacteria

Purple Phototrophic Bacteria naturally consume substrate wastes and undergo microbial operations which produce H2

Still theoretical and not developing as quickly as hoped.

Electrolysis is the Cleaner Solution.

DC current is passed through purified water to separate H2 and O2. The result is 99.999% pure hydrogen.

The process is energy intensive, but a renewable source of energy makes it practical.

Alkaline Electrolysis- uses no special metal catalysts (only nickel and iron), making it cost effective.

HPE- Creates a 100-200 Bar compressed hydrogen output.

HTE- Part of the energy needed for the electrolysis reaction is provided by heat instead of electricity.

Transporting from Plant to the Stations

Piping to Stations: Underground pipelines going from the production plant to each site.

Pipes are made of stainless steel to resist corrosion from the H2 gas.

Transported at low pressures (10-20 BAR), so it will have to be compressed when it arrives at the fueling station.

Transporting to Station:Tube Trailers – transport H2 at high pressures

Cryogenic Tank Trucks – transport liquid H2

Better for longer distances; can carry more H2

Takes additional energy to convert H2 to liquid form

Storing the Compressed Hydrogen

and BiogasHydrogen can be stored both as a compressed gas and as a liquid.

Compressed H2 gas – stored in high pressure tanks underground (to save space on site) at 350 or 700 BAR.

Liquid H2 – stored in insulated cryogenic tanks

Energy would be needed to convert back into compressed gas form.

Depends mainly on the form in which the H2 is transported.

Biogas will be stored as a liquid before being blended with hydrogen.

Dispensing the Fuel into Vehicles

H2 will be dispensed at 350 and 700 BAR, which will be available at each pump.

HCNG blend at 250 BAR will be available at two separate pumps.

Fueling Process:

Nozzle is locked into place in car by turning the handle on the nozzle.

Leakage test occurs to ensure tight seal.

Fueling begins. Emergency stop will occur if the temperature of the fuel cell is too high.

The fueling stops when the desired pressure is reached.

Another hose attached to the nozzle allows the excess hydrogen to return to storage.

For cars, fueling time is about 5 minutes. It is slightly longer for larger HCNG vehicles (around 10 minutes).

Screening Matrix – Hydrogen Production

Steam Methane Reforming from

Landfills

Steam Methane Reforming from

Wastewater

Alkaline Electrolys

is

High Pressure Electroly

sis

High Temperatur

e Electrolysis

Renewability 0 0 + + +

Cost + + 0 0 0Energy Efficiency + + - 0 0

Energy Use 0 - - - -Availability of Resources 0 - + + +

Sustainability 0 0 + + +Large Scale Production + + + 0 -Environmental Impact 0 0 + + +

Net Score 3 1 3 3 2Continue? Yes No Yes Yes No

Screening Matrix - TransportationTrucking as

LiquidTrucking as

Compressed GasPiping to Stations

Produce on Site

Initial Cost 0 0 - -Maitenance Cost - - + -

Energy Use - - + 0

Efficiency 0 - + +

Safety 0 0 0 -Amount transported + - + +

Net -1 -4 3 -1

Continue? Yes No Yes Yes

Weighted Matrix – Hydrogen Production

Concepts

SMF-Landfills

Alkaline Electrolysi

sHigh Pressure Electrolysis

Selection Criteria

Weight Rating

Weighted Score Rating

Weighted Score Rating

Weighted Score

Renewability 20% 2 0.4 5 1 5 1Cost 10% 4 0.4 2 0.2 2 0.2Energy Efficiency 7.50% 4 0.3 2 0.15 2 0.15Energy Use 10% 3 0.3 2 0.2 1 0.1Availability of Resources 15% 2 0.3 4 0.6 4 0.6Sustainability 10% 2 0.2 4 0.4 4 0.4Large Scale Production 15% 4 0.6 4 0.6 3 0.45Environmental Impact

12.50% 3 0.375 5 0.625 5 0.625

Totals 2.875 3.775 3.525Produce? No Yes No

Weighted Matrix - Transportation

Concepts

Trucking as Liquid

Piping to Stations

Produce on Site

RatingWeighted

Score RatingWeighted

Score RatingWeighted

ScoreSelection Criteria

Weight

Initial Cost 15% 2 0.3 1 0.15 1 0.15Maitenance Cost 15% 2 0.3 5 0.75 2 0.3

Energy Use 20% 1 0.2 4 0.8 3 0.6

Efficiency 20% 3 0.6 4 0.8 2 0.4

Safety 15% 3 0.45 4 0.6 4 0.6Amount transported 15% 3 0.45 5 0.75 5 0.75

Totals 2.30 3.85 2.80

Produce? No Yes No

The Energy Needed is Attainable.

Energy Needed for electrolysis:

(53.4 KWh/kg H2)(14,600,533 kg H2 produced/ year)= 780 GWh/ year

Krı´suvı´k Geothermal Power Plant production capacity: 1968 GWh/ year.

Krı´suvı´k

Reykjavik

The Complete Process

 

Piping to Station

Geothermal Power

Plant Hydrogen Production Plant

350 BAR

Compressor

350 BAR

Storage

700 BAR

Compressor

350 BAR H2 Dispenser

Biomethane

Production Plant

700 BAR H2 Dispenser

250 BAR Compressor

250 BAR Storage

Cooling Block

Chiller HCNG Blending System

250 BAR HCNG Dispenser

Ocean Water

Electricity

Layout of the Station

Front View

Right Side

The Compressor

The Fuel Pump

Nozzles

This Network Will Adequately Serve

the City30 stations spaced across the city of Reykjavik.

Each station will serve a population of about 4000 people (approx. 2600 cars).

Each station can serve up to 1333 kg H2 / day.

The electrolysis power plant will need to produce and pipe out 40,000 kg / day.

The Total Cost Allows for a Lower

Hydrogen CostCapital Costs:

Electrolysis Plant: $69 million

Pipeline to Station: $84 million total

Total cost of all other station infrastructure: $241 million

TOTAL CAPITAL COST: $394 million ($13.13 million / station)

Annual CostsSalaries per station: $100,000 / year

Auxiliary Costs for Electrolysis Plant: $2 million / year

TOTAL ANNUAL COST: $167,000 / year / station

Over a ten year span, selling hydrogen at $4.00 / kg will return a PROFIT of 16.4%

This Transportation System will Fuel

Reykjavik for Years to Come.

Using geothermal energy for power and alkaline electrolysis at a central location to produce hydrogen is 100% renewable.

Pipelines to each station will have a high capital cost but are the most cost effective long-term option for distribution.

The installation of hydrogen fueling stations in Reykjavik is an important step in eliminating the carbon footprint of the city.

Questions?Main References:

City Statistics: Statistics Iceland, <statice.is>

Geothermal Energy: Paul Jensson, University of Iceland, “Optimizing site selection for hydrogen production in Iceland”.

Electrolysis: A. Mæland, Rosnor Energo, “Hydrogen Production”

Transportation: European Industrial Gases Association, “Hydrogen Transportation Pipelines”

Storage: US Doe Energy Efficiency and Renewable Energy, “Hydrogen Storage”

Biogas: Jon Guđmundsson, Agricultural University of Iceland, “Options in biogas production in Icelandic agriculture”