The non-condensibles are removed from the condenser by condenser air removal (CAR) pumps and/or steam jet air ejectors (SJAEs) as shown in Figure 8.1-3. The CAR pumps are also called the mechanical vacuum pumps. The CAR pumps are used to initially evacuate the condenser down to at least 20" of mercury vacuum in about an hour.

Steam jet air ejectors are used as vacuum generating devices. A steam jet is used to pull air from low pressure source (suction). Read more about different types and structure of steam jet ejectors, their advantages and disadvantages.

Steam jet air ejectors (SJAE) are often used as exhausters in power plant condensers. SJAEs use high pressure steam as the motive force to create the suction and compression necessary to establish vacuum and maintain the low pressure in power plant condenser applications. As shown in Figure 1, the motive steam enters the steam chamber

Usually, the SJAE system is of Twin Element type i.e. of duplex design having two identical Ejectors per stage, one of which, being in operation at any one time and the other as stand-by. The Inter and After Condensers are generally Single Element type.

2016年2月22日 · skid. A typical piping & instrumentation diagram of the vacuum pump system is included in Figure 2. DESIGN FEATURES COMMON TO BOTH EJECTOR SYSTEMS AND VACUUM PUMP SYSTEMS . Subcooling of Air-vapor Mixture in the Condenser . Per HEI standards, the venting equipment is sized for subcooling of air-vapor mixture for a …

2003年1月1日 · This paper provides an overview of SJAE systems for nuclear plants. It discusses sizing of venting equipment, examines the interface of the SJAE system with the condenser, explores performance...

2009年1月8日 · Are you sure the problem is with the SJAE and not additional air in-leakage to the condenser? Some SJAEs include a flow measuring device on the air discharge. If so, you may want to compare the discharge flow at present with past readings.

2021年11月25日 · The two primary components used to generate the vacuum within the vacuum system are steam jet air ejectors (SJAE) and liquid ring vacuum pumps (LRVP). The performance of an SJAE is defined by mass flow versus absolute pressure at the suction inlet.

2006年1月30日 · As rmw stated, the SJAE is designed for fixed specific volume flow or in other words it is a "mass transfer" pump. Therefore, if you have liquid water in your vent line at low load you will use more of your SJAE pump capacity by pumping the …

World Class SJAE Systems Croll- Reynolds and Mazda have installed one of the world's largest state-of-the-art- Research and Test facility at its plant in Ahmedabad. With this test facility, Mazda has the ability to simulate operating conditions and analyze all anticipated variables that may be encountered under actual operating conditions.