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HYDROGEN STATISTICS

1. Density:

0.0899 kg/Nm3 (gas)

0.0708 kg/l (liquid)

2. Heating value - higher:

120 MJ/kg

                          lower:

141.86 MJ/kg

3. Explosion limits:

4.0 – 75.0 % (concentration of H2 in air)

4. Detonation limits:

18.3 – 59.0 % (concentration of H2 in air)

5. Specific heat capacity:

Cp=14.199 KJ/(kg·K)

Cv=10.074 KJ(kg·K)

6. Diffusion coefficient:

0.61 cm2/s

 Compressibility factor according to the following table:

Pressure (bar)

1

50

100

150

200

250

300

350

Compression factor

1

1.032

1.065

1.089

1.132

1.166

1.201

1.236

 

Pressure (bar)

400

500

600

700

800

900

1000

 

Compression factor

1.272

1.344

1.416

1.489

1.560

1.632

1.702

 

Example of applying the compressibility factor: 1 50-litre bottle (conventional) at 200 bars of hydrogen at 0ºC contains 0.050 m* 200 / 1.132 = 8.834 Nm3

 EQUIVALENTS

 HYDROGEN - ENERGY

Mass H(kg)

H2 gas  (Nm3)

H2 líquid1  (litres)

Energy2  (MJ)

Energy2  (kW·h)

1

=

11.12

=

14.12

=

120

=

33.33

0.0899

=

1

=

1.270

=

10,8

=

3,00

0.0708

=

0.788

=

1

=

8.495

=

2.359

0.00833

=

0.0926

=

0.1177

=

1

=

0.278

0.0300

=

0.333

=

0.424

=

3.6

=

1



1 Hydrogen is liquid at atmospheric pressure of less than 20.39 K

2 Based on lower calorific value

 HYDROGEN FLOW – ELECTRIC POWER

Kg/h de H2

Nm3/h de H2 gas

Litres/h of H2 líquido1

Power2  (kW)

1

=

11.12

=

14.12

=

33.33

0.0899

=

1

=

1.270

=

3.00

0.0708

=

0.788

=

1

=

2.359

0.00833

=

0.0926

=

0.1177

=

0.278

0.0300

=

0.333

=

0.424

=

1

1 Hydrogen is liquid at atmospheric pressure of less than 20,39 K

2 Based on lower calorific value

 

Examples:

1.An electrolyser with 85% output that produces 10 Nm3 per hour consumes 35,29 kW (10·3.00/0.85) of power and 8.091 kg of water per hour (10·0.0899·(18/2)).

2.A 10kW fuel cell with total output of 45%  consumes 7.40 Nm3 per hour of H2(10·0.333/0,45) or 0.667 kg/hour of H2 (10·0.030/0.45), and produces 6.00 kg of water per hour (0.667·(18/2)).

 

COMPARISON OF HYDROGEN WITH OTHER FUELS

Energy value based on lower calorific value

1 kg of H2 ↔ 2.78 kg of gasoline ↔ 2.80 kg of diesel fuel ↔ 2.40 kg of methane ↔ between 2.54 and 3.14 kg of natural gas (depending of the composition of the NG) ↔ 2.59 kg of propane ↔ 2.62 kg of butane ↔ 6.09 kg of methanol

1 litre of liquid H2 ↔ 0.268 litres of gasoline ↔ 0.236 litres of diesel fuel ↔ 0,431 litres of methanol

1 litre of H2 (at 350 bars) ↔ 0.0965 litres of gasoline ↔ 0.0850 litres of diesel fuel ↔ 0.240 litres of methane (at 350 bars) ↔between 0.3 and 0.35 litres of natural gas (at 350 bars) ↔ 0.117 litres of propane (at 350 bars) ↔ 0.127 litres of butane (a 350 bars) ↔ 0.191 litres of methanol

This information was prepared by ARIEMA. If you discover any error or want to make a suggestion, please send a message to   Esta dirección electrónica esta protegida contra spam bots. Necesita activar JavaScript para visualizarla .

 

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News

6 September 2016

The Spanish Hydrogen Association and Toyota join forces to boost fuel cell vehicles

The Spanish Hydrogen Association (AeH2) and Toyota Spain have signed an agreement through which both sides committed themselves to work jointly for the promotion of the hydrogen and fuel cells sector development in Spain and to promote the boost of a society based on hydrogen.

Firma_AeH2-Toyota_1

 

10 August 2016

The AeH2 releases the WHEC 2016 Outcomes Report

The AeH2 has published an overview of the WHEC 2016 results which shows the achievements of what can be considered an extraordinary World Hydrogen Energy Conference edition. 

Download the Outcomes Report of WHEC 2016

 

12 November 2015

The AeH2 has edited a new press release with the novelty of WHEC 2016

The WHEC 2016 organisation is progressing rapidly thanks to the great deal of time and effort invested in it. Thus, the AeH2 has edited a new press release compiling all the information currently available about WHEC 2016.

Download the latest press release