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Condensate pump suction pressure below 4 feet of the condenser is almost equal to condenser pressure (760mm of Hg). If the pump equiped under the deep pit , suction pressure is vary.
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∙ 12y ago
Rahul Mukati
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Why hotwell level is maintained in condenser?
High hotwell level will get the cooling water tubes of condenser submerged in the condensate hence cooling efect will be reduced consequentaly vacuum will drop. Low hotwell level will lead to low suction pressure of Condensate Extraction Pump hence it may lead to cavitation.
How vertical condensate extraction pump work?
CEP is a Multi stage vertical Centrifugal Pump having double suction impeller at 1st stage for higher efficiency and high flow rate .Pump operates at marginal difference between NASHa and NPSHr so pressure equalising line is provied at suction side .CEP suction is conected to Hotwell and above hotwell Vacuum is maintained as per turbine design. The purpose of CEP is transfer water to deaerator through LP heaters. Parag Agrawal 8102392375
How do you calculate suction pressure for air theoretically?
Air has a pressure, but not a suction pressure. Air pressure is measured with a barometer, you do not calculate it. Suction pressure is a concept which applies to a pump. Suction pressure = static pressure + surface pressure - vapour pressure - friction pressure.
Where is suction and discharge s?
Answer: The terms suction and discharge are the terms refer to hydraulics. In hydraulics if the the liquid has to be lifted or pumped to the usage area the hydraulic pump will be used . This pump will have to functions that is first suction to lift the fluid and the discharge or delivery . The familiar words in pair are lift and discharge; suction and discharge. The specification of pump for these terms are suction head and discharge head.AnswerThe suction pressure refers to the pressure of the referigerant being "sucked" back into the compressor. The suction pressure is a critical variable in ensuring the accuracy of the refrigerant charge, along with the tepmerature of that line as well. The "superheat", or heat added to the vapor in that line can be monitored in this manner.You have not mention which suction pressure... Actually Where ever the suction is presented that pressure is called suction pressure.... and suction pressure in practical cases normally always less that atmospheric pressure and in case of delivery pressure it is oppositeSaying that suction pressure is " the pressure of the referigerant being "sucked" back into the compressor " is not accurate.Simply , the suction pressure of a pump is the absolute pressure of a fluid , measured at the inlet of the pump ( in your answer , the pump is the compressor , and the fluid is whatever refrigerant. )The discharge pressure , is the absolute pressure of the liquid measured at the outlet of the pump.Obviously, the discharge pressure is usually bigger than suction pressure.
What is the purpose of balancing line in pump mainly in condensate extraction pump in power plant?
From the little detail you provide I assume you are referring to the Condensate extraction pump vents. These must return to the condenser from high points to ensure line is liquid filled and causes minimum pressure loss to the pumps. NPSH available to CEP is very small and must all be used if full capacity is to be obtained. Leaving valve open is not a problem provided both halves of condenser are in use.
Where can a condensate pump be purchased?
There are a number of places where a condensate pump can be purchased. Sites such as Saniflo, Creative Pumps and Little Giant Pump all stock condensate pumps.
Why are pumps placed at the bottom of water wells?
Pumps CAN suck water, but there is a limit to the height of the column of water they can draw up from the bottom of a well. This limit is based on the fact that water will boil at room temperature if you reduce the air pressure. In other words, the greater the height that pump has to draw water, the more likely it is to cavitate. The simple way around this is to locate the pump at the bottom of the well. A good example is a Condensate Extraction Pump in a Power Station. It has a long vertical shaft, and pumps the condensate from several metres below the Hotwell underneath the Condenser. Because the Condenser operates at a vacuum, the long shaft improves the Net Positive Suction Head (NPSH) of the Pump. For pumps located above the water level, a priming procedure is required to charge the pipe between the suction point and the pump. Such pumps are normally fitted with a foot valve to prevent the leg draining and thus losing prime.
Why is used the balancing line in boiler feed pump and its direction of flow?
In boiler feed pumps usually the discharge pressure is 20 to 30 times tie suction Pressure so to protect the pump balancing line is given from discharge to suction.
What would the pump pressure be for the master stream flowing a fog nozzle from the top of the apparatus?
Depending in the hydrant suction, pump pressure should be about 80-100 psi
What is vapour binding?
when pressure on the suction side of the pump drop below the vapour pressure of the liquid, vapour forms. It's caused because of insufficient suction head, high suction lift, excessive friction head, or high liquid temperature.
What is the function of an eccentric pipe reducer in the suction side of a pump?
if we use concentric reducer at suction of pipe ,due to high turbulence flow of fluid ,some vapour pressure generate which generate bad effects on impeller of pump ,which decrease pump efficiency , so to avoid this problem the eccentric reducer's use in pump suction
Why is the suction line of a pump larger than the discharge line?
It is common practice to specify the pump suction line one size larger than the pump discharge line in order to increase the Net Positive Suction Head available (NPSHA) to the pump. A smaller suction line the same pipe size as the discharge line would result in more pressure drop in the suction line and reduce the amount of head available to the suction side of the pump. This in turn would result in an operating point closer to cavitation of the pump.
