hp turbine and lp turbine

TURBINE PRINCIPLES OF OPERATION

The multi-shaft arrangement allows each turbine to run at its optimum speed since it is mechanically independent of the other turbine shafts. In the multi-shaft arrangements, …

Evaluating an HP/IP Turbine Replacement

With all the performance numbers in, and all the feasible scenarios analyzed, what is left is to put dollars to the numbers to determine the best cost/benefit. Looking at upfront costs, replacing the HP and IP turbines is about $12 million. Rebuilding the turbines instead of replacing them is about $1.5 million.

A steam power plant running on Rankine cycle ha... | Holooly

A steam power plant running on Rankine cycle has steam entering HP turbine at 20 MPa, 500ºC and leaving LP turbine at 90% dryness. Considering condenser pressure of 0.005 MPa and reheating occurring upto the temperature of 500ºC determine, (a) the pressure at wich steam leaves HP turbine (b) the thermal efficiency. Step-by-Step …

What is Steam Turbine

Most nuclear power plants operate a single-shaft turbine-generator that consists of one multi-stage HP turbine and three parallel multi-stage LP turbines, the main generator and an exciter. HP Turbine is usually a double-flow impulse turbine (or reaction type) with about 10 stages with shrouded blades and produces about 30-40% of the gross power output …

Intermediate-Pressure Turbine

17.3.2.2 Intermediate-pressure steam turbines. Typical IP steam turbines operate at pressures from 30 to 80 bar and inlet temperatures exceeding 600°C. Since the pressure level is relatively low compared to a typical HP turbine, horizontally split cylinder and flanges are used in a two-shell casing design ( Fig. 17.12 ).

Failure Analysis of HP Turbine Blades in a Low Bypass Turbofan …

The fracture surfaces of HP and LP turbine blades and HP NGV were examined under SEM to determine the mode of failure. As indicated in Fig. 6, the fracture surface of HPTB-1 revealed two distinct regions of …

Effect of Inlet Steam Temperature on the HP Section Efficiency of a Steam Turbine …

It has been observed that changes in inlet steam temperature impact HP section efficiency. K.C. Cotton stated that ''the effect of throttle temperature on HP turbine efficiency is significant ...

Flow Mechanisms in Low-Pressure Turbines | SpringerLink

In the spatial position of the flow path, LP turbine locates behind the high pressure turbine (HP turbine, HPT). Between the HP turbine and LP turbine in the high bypass ratio (BPR) turbofan engines, there usually arranges the bearing freamework known as the inter-turbine ducts, and turbine rear frame (TRF) ducts which is connecting to …

Why do large turbofans generally have many more LP turbine stages than HP turbine …

The HP and IP turbine only extract power for their connected compressors - the LP turbine extracts power for the fan and the LP compressor. The fan does work on all airflow through the engine, the compressors only on a fraction (10:1 for a high bypass like the Trent 1000).

Introduction to steam turbines for power plants

Electric power generation is one of the main applications of steam turbines. Since increasing temperature and pressure of turbine inlet steam increase thermal efficiency, inlet steam pressures range from 24.1 to 33.0 MPa·g (mega Pascal plus atmospheric pressure), and temperatures range from 593 C/593 C [HP turbine …

(a) HP compressor and (b) LP compressor maps. HP: high pressure; LP…

parameters and flow characteristics of HP (JK70A) and LP (JK100K) turbines are shown in Table 2 and Figure 4, respectively. The template of shaft moment of inertia was input according to the ...

High Pressure Turbine vs Low Pressure Turbine

Pressure Range: High-pressure turbines operate at high pressure ranges, typically 1000-2000 psi, while low-pressure turbines operate at lower pressure ranges, typically 250-600 psi. Steam Velocity: High-pressure turbines have higher steam velocities compared to low-pressure turbines, which have slower steam velocities.

HP Turbine

Most nuclear power plants operate a single-shaft turbine-generator that consists of one multi-stage HP turbine and three parallel multi-stage LP turbines, the main generator and an exciter. HP Turbine (high-pressure …

What is Steam Turbine

Most of nuclear power plants operates a single-shaft turbine-generator that consists of one multi-stage HP turbine and three parallel multi-stage LP turbines, a main generator and an exciter. HP …

Effect of HP and LP steam temperature on the generated power by …

Download scientific diagram | Effect of HP and LP steam temperature on the generated power by steam turbine. from publication: A new method to boost performance of heat …

Low Pressure Turbine vs. High Pressure Turbine

In other words, the LP turbines have to do most of the work, with less pressure available. So more turbines. The HP turbine has less work to do (it is essentially just a "gas generator", to use the turboprop term) with more pressure available, so you only need 1 or 2 discs. Reply. 7th Dec 2014, 17:04.

Power fraction of HP, IP and LP turbines for different …

IEEEG1 general steam turbine model component IEEEG1 is a dynamic model for modelling all types of steam turbine, whether they are cross-compound, tandem compound turbine, double or single reheater ...

What is LP Turbine

Most of nuclear power plants operates a single-shaft turbine-generator that consists of one multi-stage HP turbine and three parallel multi-stage LP turbines, a main generator and an exciter. Each …

Steam turbine

OverviewMarine propulsionHistoryManufacturingTypesPrinciple of operation and designDirect driveLocomotives

In steamships, advantages of steam turbines over reciprocating engines are smaller size, lower maintenance, lighter weight, and lower vibration. A steam turbine is efficient only when operating in the thousands of RPM, while the most effective propeller designs are for speeds less than 300 RPM; consequently, precise (thus expensive) reduction gears are usually required, although nume…

Turbine map

Each turbine in a gas turbine engine has an operating map. Complete maps are either based on turbine rig test results or are predicted by a special computer program. Alternatively, the map of a similar turbine can be suitably scaled. Description A turbine map shows lines of percent corrected speed (based on a reference value) plotted against the …

Chapter 8a: Ideal Rankine and Reheat Steam Power Cycles (revised …

This is shown below as an Ideal Rankine cycle, which is the simplest of the steam power cycles. We have specifically split the turbine into a High Pressure (HP) turbine and a …

Flow Mechanisms in Low-Pressure Turbines | SpringerLink

In the spatial position of the flow path, LP turbine locates behind the high pressure turbine (HP turbine, HPT). Between the HP turbine and LP turbine in the high …

Steam turbine

Steam turbine. The rotor of a modern steam turbine used in a power plant. A steam turbine is a machine that extracts thermal energy from pressurized steam and uses it to do mechanical work on a rotating output shaft. Its modern manifestation was invented by Charles Parsons in 1884. [1] [2] Fabrication of a modern steam turbine involves …

Influence of variable-geometry HPT on HP and LP turbine …

Abstract. To explore the influence of high-pressure turbine with variable geometry on the entire turbine performance, a spherical end-wall VGT is used on the HPT of a two stage turbine, and a full ...

Principle of Operation of Turbine Generator

Most nuclear power plants operate a single-shaft turbine-generator that consists of one multi-stage HP turbine and three parallel multi-stage LP turbines, the main generator and an exciter.HP Turbine is usually a …

Steam Turbines for Thermal Power Plants (Up to 1,200 …

Characteristics. The optimal last stage blade (LSB) length and number of casings is selected based on the steam exhaust conditions. By combining the high pressure (HP) turbine and intermediate pressure (IP) turbine …

[PDF] Evolution of the flow through a turning mid turbine frame applied between a transonic HP turbine stage and a counter-rotating LP turbine ...

To enhance the performance of modern high-bypass jet engines a promising approach is to replace the low pressure-vane row arranged downstream of a strutted intermediate turbine diffuser (mid turbine frame) by the application of turning struts and to integrate functionalities such as bearing supports, lubrication pipes, engine mounts and aggressive …

Hp/ lp bypass system for steam turbines | PPT

The document discusses the HP/LP bypass system used in thermal power stations. The bypass system allows live steam from the boiler to bypass the turbine and be dumped into the condenser. This allows the boiler to continue operating during turbine trips or startup before the turbine is up to temperature. It comprises HP and LP bypass valves ...

Mitsubishi Power | Steam Turbines for Nuclear Power Plants

Steam turbines for nuclear power plants employ an extremely long last stage blade (LSB), with the high pressure (HP) turbine, low pressure (LP) turbine and generator arranged along a single rotor, generating up to 1,800 MW. The turbines are designed to be extremely safe and reliable with efficiency among the highest in the industry.

Effect of HP and LP steam temperature on the generated power by steam turbine…

It was found that although by increasing the split ratio from 2.5% to 15% the steam turbine power and consequently net produced power rises from 0.15 to 0.9 MW e, the exergy destruction of HRSG ...

Evaluating an HP/IP Turbine Replacement

The current HP, IP and LP turbines were built by General Electric. The unit is a cross-compound arrangement, with single-flow HP and IP turbines powering one 3,600 rpm generator and a double-flow ...

INFORMATION SHEET

Low pressure (LP) turbine: The LP turbine (see Figure 6) is located next to the HP turbine. The LP turbine is a pressure compounded, either single or dual axial flow, condensing reaction turbine. Division of steam flow : On …