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2

# Lhv Of Fuel

fuel properties calculation

7 replies to this topic
|

### #1 Danish John Paul

Danish John Paul

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Posted 12 October 2020 - 11:08 PM

Hi,

Please explain the steps on how to find the LHV using any software or hand calculation. Please share if any notes if you are having :-)

Is LHV same as the calorific value? Do we have anything to do with LHV and HHV and where doe we specifiy?

Why do we always care about the LHV of a fuel? Why not HHV?

Regards

Danish

### #2 breizh

breizh

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Posted 12 October 2020 - 11:21 PM

Hi,

Yes heating values and calorific values are the same .

Sometimes you can read calorific power , all the same :

PCI =LHV;

PCS =HHV

Good luck

Breizh

#### Attached Files

Edited by breizh, 12 October 2020 - 11:45 PM.

### #3 Danish John Paul

Danish John Paul

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Posted 13 October 2020 - 01:52 AM

Hi,

Yes heating values and calorific values are the same .

Sometimes you can read calorific power , all the same :

PCI =LHV;

PCS =HHV

Good luck

Breizh

Sir,

Can you please share how the LHV is significant for Flare system design?

### #4 breizh

breizh

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Posted 13 October 2020 - 02:29 AM

Hi ,

Review the standard attached , page 26.

Hope this is helping you

Breizh

### #5 fallah

fallah

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Posted 13 October 2020 - 03:32 AM

Can you please share how the LHV is significant for Flare system design?

Hi,

Measuring the LHV of the flare gas mixture is required to determine the minimum quantity of assist gas.

### #6 Danish John Paul

Danish John Paul

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Posted 13 October 2020 - 07:31 AM

Can you please share how the LHV is significant for Flare system design?

Hi,

Measuring the LHV of the flare gas mixture is required to determine the minimum quantity of assist gas.

Does it has anything to do with the diameter of the flare tip and the ringlemann scale for the quality of smokeless flaring?
Why is that we never go for the HHV value of the fuel?? HHV value will always be higher than LHV. But we don't find its use anywhere..
Can you please enlighten on the term "flexibility normal flowrate". This has been asked by the vendor for a flare design.
How do we determine the design of flare for 0-100% flowrate?

Edited by Danish John Paul, 13 October 2020 - 07:32 AM.

### #7 fallah

fallah

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Posted 13 October 2020 - 09:08 AM

Does it has anything to do with the diameter of the flare tip and the ringlemann scale for the quality of smokeless flaring?

Why is that we never go for the HHV value of the fuel?? HHV value will always be higher than LHV. But we don't find its use anywhere..
Can you please enlighten on the term "flexibility normal flowrate". This has been asked by the vendor for a flare design.
How do we determine the design of flare for 0-100% flowrate?

When LHV of flare gas is to be evaluated for estimation of required assist gas, there would be no need to evaluate the HHV...

Normal flow rate which has been asked by vendor might be the continuous relief load plus purge gas...

### #8 breizh

breizh

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Posted 13 October 2020 - 07:42 PM

Hi,

A doc from John Zinc , the reference company on the subject : Selecting the proper flare system .

LHV vs HHV  , consider the link attached

https://www3.epa.gov...SD_04_19_07.pdf

Good luck

Breizh

#### Attached Files

Edited by breizh, 13 October 2020 - 08:07 PM.