PERFORMANCE OF CONDENSER AND EFFECT OF VACUUM IN 120 MW THERMAL POWER PLANT

Department of mechanical engineering

Gandhiji Institute of science and technologyApproved by AICTE, New Delhi , Affiliated to JNTU,

KAKINADAGattu- Bhimavaram (P) , Vatsai(M), Krishna Dist., A.P-

521175

UNDER GUIDE BY : HEAD OF DEPARTMENT:

SHAIK MOULALI M.Tech K. PRADEEP KUMAR M.TECH

Asst. Professor Asst. Professor

PRESENTED BY :

UJJAWAL KUMAR SHARMA 13JF1A0344

SAURAV RANJAN 13JF1A0338

CHANDAN KUMAR 13JF1A0307

A. SUDHEER KUMAR 14JF5A0306

A. SURESH KUMAR 14JF1A0307

U. NAGARAJU 14JF1A0304

CONTENTS

Abstract

Introduction

Various Method For Condenser Cleaning For Improvement Of Its Performance

Condenser performance

Results And Graphs

Conclusion

Abstract

The purpose of present project is to analyze the performance of condenser at 120 MW thermal power

plant and comparison made with the partial loads of 116

MW and 110 MW. It is used as the guidance for the scheduling maintenance outages on the basis of performance trades.

Here an attempt is made on various factors like vacuum systems, circulating water system, that effect on the actual performance of condenser.

The whole project carried out at 120 MW thermal station in unit no.7 at KTPS, Paloncha ,Kothaguddem.

INTRODUCTION

About Thermal Power Plant

About APGENCO

About KTPS

Condenser

Circulating Water System

Cooling Tower

Plant layout

CONDENSATE SYSTEM

Condenser Types of condenser

1) Direct contact

Surface contact

Constructional feature

Air leakage in condenser

Location of air leakage

Disadvantages of detecting air leakage in condenser

Circulating water leakages

Effect of cooling water leakage into the condensate

Initial indication of a tube leak

Air extraction system

Various Methods for Condenser Cleaning For Improvement Of Its Performance

Cleaning With Wire Brushes And Rods

1.Nylon Brush Type

2.Steel Brush Type

3.Sponge Ball Type

Bullet cleaning

Chemical cleaning during shutting down

Condenser on load tube cleaning system (OLTC system)

PERFORMANCE CALCULATIONS

AT LAOD 116 MW:

Main steam flow =348 tons

Main steam Temperature = 537 oC

Main steam Pressure =132kg/cm2

CW inlet temperature =29 oC

CW outlet temperature =39 oC

LP turbine exhaust steam temp. = 48 oC

Condenser Vacuum =0.91 bar

Efficiency of condenser =52.6 %

Vacuum Efficiency = 95.56 %

AT LOAD 110 MW

Main steam flow = 335 tons

Main steam temperature =535 oC

Main steam pressure = 125kg/cm2

CW inlet temperature = 34 oC

CW outlet Temperature = 43 oC

LP turbine Exhaust temperature = 52 oC

Condenser Vacuum =0.88 bar

Efficiency of condenser = 50 %

Vacuum Efficiency = 98.2 %

Results And Graphs

The various parameters in the performance are noted and their relations are plotted :

1.Load vs vacuum

2.cooling water vs vacuum

3.Latent heat vs cooling water flow rate

4. Vacuum vs cooling water outlet

CONCLUSION

the parameter like condenser duty, vacuum efficiency, clean lines factor, cooling water flow, latent heat and performance of condenser and effect of vacuum are analyzed.

the efficiency of the condenser is reduced at reduced loads.

The main problem in condenser functioning is fouling and corrosion compared to other parameters like tube leakage and air leakage.

Sponge balls cleaning method is the best method for increasing the condenser efficiency.

vacuum in the condenser effects its performance.

Latent heat vs vacuum