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  #1  
Old 04-21-2008, 04:59 AM
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Default MMBTU to PPH

I am working on a project for steam savings. My steam cost is 8.0013/mmbtu, I need to calculate what my cost is per 1000pph.

Also if you could give me some pointers on figuring electricity savings that would be great also.

I really appreciate your help!!
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  #2  
Old 04-21-2008, 12:52 PM
Mrs X Mrs X is offline
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Default Re: MMBTU to PPH

Quote:
Originally Posted by Unregistered
I am working on a project for steam savings. My steam cost is 8.0013/mmbtu, I need to calculate what my cost is per 1000pph.

Also if you could give me some pointers on figuring electricity savings that would be great also.

I really appreciate your help!!
Is pph pounds per hour? Also are you producing steam or using it? - either way, you might need to know the temperatures (start and end) and pressures. - This is by no means a simple question.
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  #3  
Old 04-22-2008, 12:22 PM
rperry
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Default Re: MMBTU to PPH

I am using 150# saturated steam in my process. Don't have a chart handy but I think it is 354degf, or somewhere close to that. I am doing a project that will potentially cut about 2,000,000 pounds of steam per month.

I pay for my steam in mmbtu, and I am not asure how to convert that to pounds so I can calculate the savings.'

I appreciate the help.
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  #4  
Old 04-23-2008, 03:55 AM
JohnS JohnS is offline
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Default Re: MMBTU to PPH

I've never seen a steam contract and don't know how they are written. However, I would recommend looking at the contract as it may include the necessary factors. Or, speak to your steam supplier.

Do you return the steam at lower pressure/temperature (or condensed water)? The factor for BTU/lb should be the specific enthalpy of the steam as supplied, less the specific enthalpy as returned (if returned). This can be found in Steam Tables. Unfortunately, I don't know a lot about steam calculations, and can't help much more than that.
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  #5  
Old 05-23-2008, 01:05 PM
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Default Re: MMBTU to PPH

Lbs Steam delivered per Hour
Large boiler capacities are often given in lbs of steam evaporated per hour under specified steam conditions.

BTU - British Thermal Units
Since the amount of steam delivered varies with temperature and pressure, a common expression of the boiler capacity is the heat transferred over time expressed as British Thermal Units per hour. A boilers capacity is usually expressed as kBtu/hour (1000 Btu/hour) and can be calculated as

W = (hg - hf) m (1)

where

W = boiler capacity (Btu/h)

hg = enthalpy steam (Btu/lb)

hf = enthalpy condensate (Btu/lb)

m = steam evaporated (lb/h)

Boiler Horsepower - BHP
The Boiler Horsepower (BHP) is the amount of energy required to produce 34.5 pounds of steam per hour at a pressure and temperature of 0 Psig and 212 ?F, with feedwater at 0 Psig and 212 ?F. An BHP is equivalent to 33,475 BTU/Hr or 8430 Kcal/Hr and it should be noted that a boiler horsepower is 13.1547 times a normal horsepower.

Horsepower (hp) can be converted into lbs of steam by multiplying hp with 34.5.

Example

200 hp x 34.5 = 6900 lbs of steam per hour

Lbs of steam can be converted to hp by dividing lbs steam per hour by 34.5

Example

5000 lbs of steam / 34.5 = 145 hp boiler
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  #6  
Old 11-21-2008, 11:20 AM
onuigbo@hotmail.com
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Default Re: MMBTU to PPH

1 MMBTU is essentially equal to 1,000 pph of steam and if your cost of steam is $8.00 per MMBTU is $8.00 per thousand pounds of steam generated
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  #7  
Old 06-29-2011, 02:48 PM
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Default Re: MMBTU to PPH

I keep seeing the reference to 1,000 pph = 1 MMBTU, but I don't understand how this can be with varying steam temperatures and pressures. Won't 1,000 lbs of 270 psi steam have more energy than 1,000 lbs of 135 psi steam?

Thanks,

Jack
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  #8  
Old 06-29-2011, 06:02 PM
HerrWarum HerrWarum is offline
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Default Re: MMBTU to PPH

This may help
http://www.google.com/cse?cx=partner...team&sa=Search
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  #9  
Old 06-30-2011, 07:47 AM
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Default Re: MMBTU to PPH

Thank you. I see that the answer is yes, it has slightly more energy, but in practical terms, the pressure doesn't matter much.
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  #10  
Old 02-01-2012, 01:37 PM
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Question Re: MMBTU to PPH

what is PPH mean?
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