How much pressure is required to run a turbine?

Each turbine has five blades with a stainless steel shaft inside the pipe. The power components (Siemens) are outside the pipe. The minimum flow requirements are 20 cfs at 40 psi. Each turbine reduces head pressure by just 1 to 5 psi.

How much steam is needed to turn a turbine?

To turn 1kg (2.2lb) of water at 100°C (212°F) into 1kg of steam at the same temperature, you need to supply about 2257 kilojoules of energy, or roughly 1000 times as much as an electric kettle or toaster uses in one second.

How steam is used to rotate the turbine?

When steam blows into the turbine, the spinning blades (fitted inside the outer container) are flown at higher rates. Because of high pressure, the continuous flow of electricity is generated at incredibly high speed, therefore the rotating speed increases when comparing with other wind and water turbines.

How is steam turbine power calculated?

The unit work equation is: wt = (inlet steam enthalpy – cold reheat enthalpy) + (hot reheat enthalpy – turbine exhaust enthalpy). In this case, wt = (1,474.1 – 1,248.1) + (1,526.5 – 1,003.9) = 748.6 Btu/lbm.

What is a high pressure turbine?

High pressure turbine: The high pressure (HP) turbine (see Figure 1) is the first main engine turbine to receive steam from the main steam system. It is designed to efficiently extract work out of high pressure steam. The HP turbine is a pressure-velocity compounded, single axial flow, non-condensing impulse turbine.

How do you calculate turbine efficiency?

How to Calculate Turbine Efficiency

1. Define the steam turbine calculation.
2. Calculate the actual power used by the generator to produce the 1.2 megawatt-hours of electricity: 1.2 megawatt-hours divided by 0.82 (82 percent) generator efficiency = 1.4634 megawatt-hours of power.

What is exhaust pressure in steam turbine?

Exhaust pressure at the exit of the last-stage blades is one of the most important parameters that limit the operation of a steam turbine, especially on days with hot ambient conditions. Last-stage blades are generally highly stressed and are vulnerable to vibrations caused by aeromechanics instabilities.

Why does steam rotate the turbine Shaalaa?

Steam is used to rotate the turbine to generate electricity. Here heat energy is converted into electric energy.

Why is steam used to rotate turbines in all thermal power plants?

When pressure is applied on steam and allowed to pass through a small opening we can easily obtain kinetic energy. (iv) Hence, in all types of thermal power plants steam is used to rotate turbines.

How to calculate the power of back pressure steam turbine?

1-Calculate the power generated in a back pressure steam Turbine, where 50 TPH steam enters the Turbine at 66 kg/cm2 & temperature 485 Deg C.And steam exhausts to process at pressure 2 kg/cm2 & temperature 180 Deg C. For calculation of power we need to know the enthalpy of inlet & exhaust steam. 2.

How much torque does a steam turbine need to rotate?

After around 5–10\% of design speed the turbine will be able to sustain the rotation on its own provided there is continuous supply of compressed air/steam. But after the turbine is set into a steady state, torque is generated and not required.

How much moisture can a steam turbine handle?

Steam turbines typically rotate at 3,000–15,000 rpm. At that speed, water droplets can form and unbalance the turbine blades, causing severe mechanical damage. BPSTs can usually operate safely at up to 3\% moisture ( i.e., a minimum steam quality of 97\%). CSTs specially designed for utility-scale power plants can handle as much as 10–12\% moisture.

How can we generate power from a steam turbine?

Mass flow rate of water depends on the nozzle diameter and total head of water. So, you can generate required force by forcing the water/steam to change its momentum appropriately, when it hits the blades of turbine. This force, multiplied by radius, gives the TORQUE acting on the turbine. Hence, power is generated.