Actually, I need the ejector to maintain the vacuum in the condenser of a steam turbine power plant and the turbine exhaust pressure is 9.8 kPa. Need help please..
The pressure you cited (9.8 kPa which is less than 100 KPa) should refer to the vacuum in the main condenser of the power plant and not the exhaust steam from the turbine.
In order to do the calculations that you requested, you need to know the turbine power (kW or MW) and from an energy balance around the condenser, you will be able the enthalpy of the steam entering the turbine and, hence, the mass flowrate and all its thermodynamic and operating conditions.
Once again, you need to specify the or energy that the turbine produces.
Hope this helps answer your question.
Professor Yehia Khalil
Yale University
USA
I think you want to calculate the steam pressure that is required to drive a steam ejector, which is used for make in startup time and establishing the condenser vacuum. To do this, you have to calculate the flow rate of non-condensate gases that have to eject from the condenser (based on chemical information) and then design the capacity of this equipment, which is a heat exchanger too. After that, you have to calculate the motive steam pressure. It can be done by simulating it in some Softwares, like Fluent or ANSYS CFX. However, there are some existing steam power plants that use such a system and you can get help there.
To do this, you have to calculate the flow rate of non-condensate gases that have to eject from the condenser (based on chemical information) and then design the capacity of this equipment, which is a heat exchanger too. After that, you have to calculate the motive steam pressure. It can be done and optimised by simulating it in some Softwares, like Fluent or ANSYS CFX. However, there are some existing steam power plants that use such a system and you can get help there.
For example, in the range of 200 MW steam power plants, this steam has conditions of about 6 bar pressure and 220 C temperature,
Hope this helps you.
- Badges
- Science topic
- Similar topics
- Engineering
- Thermal Engineering
- Thermofluid
- Heat Transfer