A recent project involves a PD pump pumping liquids to multiple locations, and individual flows to the locations are supposed to be evenly distributed. To evenly distribute the flow, control valves are installed on individual lines, and the pump is equiped with VFD on discharge pressure control...
Hello,
In my previous FKOD sizing experience, I didn't need to consider the liquid residence time, even the API recommended sizing method does not mention the liquid residence time requirements. In a recent heavy oil job, the FKOD is required to have 20 minutes residence time, is this normal...
For a 40 hp motor with 1.15 service factor, when the motor starts to pull high amps like 52 amps, what would be the horsepower being consumed? Is it still under 40 hp like 38 hp, or it is already higher than 40 hp like 45 hp?
Hello,
Has anyone sized a PSV on the glycol regen reboiler? What would be case here?
Rich glycol from the flash drum level control valve goes to the still column that opens to atmosphere with packing inside. The rich glycol going into the reboiler is heated by the directly fired firetube, and...
Hello,
What would be the proper methodology for sizing a control valve with liquids flashing downstream?
Fisher recommends allowable pressure drop method that results in a larger valve than using actual pressure drop. The question is, how can I get the required pressure drop if the much lower...
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For a separator liquid outlet, what are the pros and cons by using a pump against a blowcase? Speciacally, will this choice affect the slug capacity required for the separator? Thanks.
Hello,
After SO2 dispersion modeling, the flare stack has to be 500 ft to meet the regulations, in addition to adding fuel gas, what are the other options? If adding fuel gas, how to operate? Thanks.
Hello,
Can anyone introduce the derating of compressor gas engine due to the fuel gas quality? How to judge that the engine needs to be derated? What are the related factors? etc. Thanks.
Merry christmas,
Can anyone explain the usage of the adjustable port valves? By adjusting the port size, we can change the valve capacity, right? To restrict the flow (when fully open) to a very low level, do we need a restrict orifice, or the adjustable port valve can do it itself? Thanks.
Merry christmas,
I need to control the downstream temperature of a JT valve by opening or closing the valve itself. Is this applicable? How to realize it? Thanks.
Hello,
When evaluating the capacity of a reciprocating compressor with multiple volume pocket unloading, at the same discharge pressure, do we consider the flow in the unloading conditions (which may be higher at higher suction pressures and unloading keeping the HP requirements lower), or just...
Hello,
when we say the capacity of a STX is 27 MMscfd, what exactly does that mean? Is the capacity limited by velocity/pressure drop or process conditions? How to calculate the shell side and tube side velocity? Is there any guideline regarding the maximum velocity/pressure drop?
Any input...
120 Deg C saturated steam (198.53 Kpa(a))is cooled by a heat exchanger. The outlet condition is 80 Deg C and 175 kPa(a) (under-saturated from steam table). What is the physical process of the steam in the HEX? Is it from 120 C steam to 120 C water, then from 120 C water to 80 C water? Or...
I am working on a project involving an old gas plant built in 1970's. The UA's of the Shell and tube exchangers need to be determined. The only UA data availabe are from the plant performance test conducted a year ago. Now the plant inlet flow will be reduced significantly. Can anyone help to...
For an oil battery simulation, how is the oil treater usually simulated? Someone use a heater and separater combination, some use distillation column? Input please.
