Surge control tanks and Surge anticipating valve
Surge control tanks and Surge anticipating valve
(OP)
I am working in water project to rehabilitate water pumping stations , the stations were built before 6 years , the discharge operating pressure is around 35 bar , the original design for the stations included surge anticipating valve (SAV) to absorb the surge waves during the power failure and the pump shutdown . After two years of operation, several failures for the booster pumps and the valves at the discharge side of the pumps were occurred, part of the failures causes were expected to be due to the inefficient method of absorbing the surge waves by using the surge anticipating valves (SAV) , the consultant is proposing to install surge tanks (ST) to fix this problem , However they will keep the surge anticipating valves installed .
My question is, in case we will have the surge tanks operating with the surge anticipating valves:
1 - Is it recommended to have both systems (surge tank and surge anticipating valve) operating at the same time, and what is the disadvantages???
2- Incase, both systems will work, is it better to set the surge anticipating valve to OPEN at the same time the surge tank is working so as to quicken the absorbing of the surge waves, OR to set the surge anticipating valves to open at higher pressure setting after the pressure setting of the surge tank to make the surge anticipating valves work as BACKUP system in case the surge tank doesn't work??
Thanks in advance for all your inputs ...
My question is, in case we will have the surge tanks operating with the surge anticipating valves:
1 - Is it recommended to have both systems (surge tank and surge anticipating valve) operating at the same time, and what is the disadvantages???
2- Incase, both systems will work, is it better to set the surge anticipating valve to OPEN at the same time the surge tank is working so as to quicken the absorbing of the surge waves, OR to set the surge anticipating valves to open at higher pressure setting after the pressure setting of the surge tank to make the surge anticipating valves work as BACKUP system in case the surge tank doesn't work??
Thanks in advance for all your inputs ...





RE: Surge control tanks and Surge anticipating valve
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Surge control tanks and Surge anticipating valve
Best regards
Morten
RE: Surge control tanks and Surge anticipating valve
the surge tank that we will use is a bladder tank , that will be charged for a certain value of pressure.
RE: Surge control tanks and Surge anticipating valve
Its not apparent why you would need both systems. Either one should work, if designed and operated correctly. What's more interesting is to find out exactly why the failures occured. It sounds like nobody knows that yet. Was it a design error, such as insufficient valve flow capacity, a valve malfunction due to incorrect setting, no maintenance, unexpected operating condition out of range, operator error, etc. and find a solution that addresses the problem as directly as possible.
If you are going to build the tank, I'd make it big enough to handle all surge flows without the help of any valves to handle the highest pressure ranges.
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Surge control tanks and Surge anticipating valve
Thanks alot.
RE: Surge control tanks and Surge anticipating valve
I support BigInch here in that you should size the surge tanks for all scenarios where surge will occur and forget about the surge anticipation valves.
Make sure the consultant looks at al the scenarios for the "worst" cannot be determined until this is carried out.