pyMorty
Industrial
- Mar 9, 2014
- 46
Hi,
In gas compression (with reciprocant compressors & combustion engines) sometimes we have no option but taking fuel gas from the discharge line. Given the most common escenario we usually encounter there is a gas feed at 70 kg/cm2, whereas our fuel stream pressure needs to be around 7 kg/cm2. Considering a discharge gas temperature of 40 deg C, this will imply, in a single step pressure reduction, that our fuel gas supply would be around 8.5 deg (using a rule of thumb of 0.5 deg C reduction for every kg/cm2 reduced).
Leeting alone possible choked flow escenarios, and the above implying we need a multi step pressure reduction (two steps) Is there any general recommendation for distance between valves in order for the gas to recover temperature before entering the following regulator valve? (we generally work with 35 deg C ambient).
Thank you in advance.
In gas compression (with reciprocant compressors & combustion engines) sometimes we have no option but taking fuel gas from the discharge line. Given the most common escenario we usually encounter there is a gas feed at 70 kg/cm2, whereas our fuel stream pressure needs to be around 7 kg/cm2. Considering a discharge gas temperature of 40 deg C, this will imply, in a single step pressure reduction, that our fuel gas supply would be around 8.5 deg (using a rule of thumb of 0.5 deg C reduction for every kg/cm2 reduced).
Leeting alone possible choked flow escenarios, and the above implying we need a multi step pressure reduction (two steps) Is there any general recommendation for distance between valves in order for the gas to recover temperature before entering the following regulator valve? (we generally work with 35 deg C ambient).
Thank you in advance.
