logging in or signing up HEAT RATE AUDIT IN THERMAL POWER PLANT shivajichoudhury Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 1712 Category: Science & Tech.. License: All Rights Reserved Like it (2) Dislike it (0) Added: November 18, 2010 This Presentation is Public Favorites: 3 Presentation Description No description available. Comments Posting comment... By: webstarsandeep (13 month(s) ago) Dear Sir, Currently we are working for tube cleaning analysis project for our academics. Kindly send me this ppt and any other available related to tube maintenance to webstarsandeep@gmail.com Thanks & Regards, Sandeep Saving..... Post Reply Close Saving..... Edit Comment Close By: Nayan0125 (15 month(s) ago) rfh Saving..... Post Reply Close Saving..... Edit Comment Close By: nganmh (15 month(s) ago) It is very related to my job, would you please send me the presentation of heat rate audit in thermal power plant for my further learning? Thank you MH Saving..... Post Reply Close Saving..... Edit Comment Close By: vino.rose (15 month(s) ago) i want ovaer all extension of power plant working Saving..... Post Reply Close Saving..... Edit Comment Close By: slandge123 (15 month(s) ago) Dear sir Pl send this presentation to me on slandge@walchand.com thanks Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript HEAT RATE AUDIT IN THERMAL POWER PLANT : HEAT RATE AUDIT IN THERMAL POWER PLANT SHIVAJI CHOUDHURY HEAT RATE : HEAT RATE Heat rate is the heat input required per unit of power generated (kcal/kWh), for specific fuel being fired and specific site conditions. OBJECTIVE : OBJECTIVE To identify degradation in thermal performance of the unit and to point out the cause and location of power and efficiency losses BENEFIT -identification of losses : BENEFIT -identification of losses Efficiency increase Green house gases emission decrease Particulate emission reduction Availability improvement Reduction in O&M cost Less capacity addition Increase profitability LOSSES IN THERMAL POWER PLANT : LOSSES IN THERMAL POWER PLANT 1.Boiler losses 2.Turbine losses 3.Condensate/feed water system losses. 4.Circulating water system losses. 5.Steam conditions 6.Electrical auxiliary losses 7.Steam auxiliary losses 8.Fuel handing 9.Heat losses 1.BOILER LOSSES : 1.BOILER LOSSES 1.1.Moisture losses 1.2.Dry gas losses 1.3.Incomplete combustion 1.4.Radiation losses 1.1.Moisture losses : 1.1.Moisture losses High moisture in air Tube leaks Coal quality 1.2.Dry losses : 1.2.Dry losses Boiler casing air leakage Air pre heater leakage Incorrect fuel air ratio Fouled heat transfer surfaces 1.3.Incomplete Combustion : 1.3.Incomplete Combustion Coal quality Increased in ash contain Increased in carbon contain Decreased Coal mill fineness Classifier vanes improperly adjusted Ring/roller wear Classifier vane wear Burner tips plugged Burner damper settings Incorrect fuel air ratio. Hi oxygen at boiler out 2.TURBINE LOSSES : 2.TURBINE LOSSES 2.1.Mechanical damage Metallurgical defects Maintenance practices 2.2.Flow area decrease Mechanical blockage Blade deposits 2.3.Flow area bypass 2.4.Flow area increase 2.3. FLOW AREA BYPASS : 2.3. FLOW AREA BYPASS H P Turbine inlet bushing leakage Main steam valve leakage H P gland seal leakage IP steam /intercept valve leakage I P Turbine inlet bushing leakage 2.4. FLOW AREA INCREASE : 2.4. FLOW AREA INCREASE Spill strip or packing leakage. Rubbing Thermal stress Erosion of turbine stages. Solid particle erosion of nozzle block. Condenser leaks Poor water chemistry Blade mechanism damage. 3.CONDENSATE/F W SYSTEM LOSSES : 3.CONDENSATE/F W SYSTEM LOSSES CEP/BFP efficiency Shaft rub Impeller wear Flow resistance path increase LP/HP heaters (high TTD) Excessive tube plugged FW heater out/bypass FW heater level low 4.CIRCULATING WATER LOSSES : 4.CIRCULATING WATER LOSSES Air binding of condenser tubes Excessive air in leakage Inadequate air removal capacity Fouled condenser tubes Microfouling Plugged condenser tubes Air binding water box Low circulating water flow Increased CW system resistance Deceased CW pump performance 5.STEAM CONDITION : 5.STEAM CONDITION Firing conditions High super heater spray flow High re heater spray flow Inadequate heat transfer surface 6.ELECTRICAL AUXILIARY LOSSES : 6.ELECTRICAL AUXILIARY LOSSES Precipitator performance Ash deposit Excessive rapping High ash in coal Change in fan efficiency (ID,FD,PA) Coal Mill performance Classifier setting incorrect Coal quality 7.STEAM AUXILIARY LOSSES : 7.STEAM AUXILIARY LOSSES Excessive soot blowing Decreased in BFPT efficiency Low inlet steam temperature Excessive steam flow through vacuum pump Steam trap leaking Excessive usage of steam coil 8.FUEL HANDING : 8.FUEL HANDING Spillage from the belt/transport Coal pile erosion Wind erosion Water erosion Coal pile fire Measurement inaccuracies 9. HEAT LOSSES : 9. HEAT LOSSES Insulation missing Steam leakage Leaks to condenser Leakage through bypass lines/valves Leakage through vents and drains Leakage to blow down tank POWER PLANT EFFICIENCY : POWER PLANT EFFICIENCY Sub critical - 34% Super critical- 37% Ultra super critical 41% HEAT RATE OF TURBINE UNIT-Kcal/KWH : HEAT RATE OF TURBINE UNIT-Kcal/KWH 210 MW TURBINE(LMZ)- 2063 210 MW TURBINE (KWU)- 210 MW- 1952 168 MW - 2001 500 MW TURBINE (KWU)- 500 MW - 1945 400 MW- 1988 300 MW- 2063.2 250 MW - 2134.3 Example of 210 MW : Example of 210 MW Operating efficiency of unit is 37.5 %. Unit heat rate is 2305 Kcal/kwhr To produce 860 Kcal ( heat equivalent to one kwhr) ,2305 kcal heat has to supplied to boiler. Losses in the boiler- 266 kcal Losses in turbine generator- 1179 kcal Total losses-(266 +1179)= 1445 kcal Parameters monitor by most of the utilities : Parameters monitor by most of the utilities Condenser Back pressure Auxiliary power Excess oxygen Make up Unburned Coal moisture Main steam temp Main steam press HRH temp HRH press H P efficiency IP efficiency Boiler inlet feed water temp THANKING YOU : THANKING YOU You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
HEAT RATE AUDIT IN THERMAL POWER PLANT shivajichoudhury Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 1712 Category: Science & Tech.. License: All Rights Reserved Like it (2) Dislike it (0) Added: November 18, 2010 This Presentation is Public Favorites: 3 Presentation Description No description available. Comments Posting comment... By: webstarsandeep (13 month(s) ago) Dear Sir, Currently we are working for tube cleaning analysis project for our academics. Kindly send me this ppt and any other available related to tube maintenance to webstarsandeep@gmail.com Thanks & Regards, Sandeep Saving..... Post Reply Close Saving..... Edit Comment Close By: Nayan0125 (15 month(s) ago) rfh Saving..... Post Reply Close Saving..... Edit Comment Close By: nganmh (15 month(s) ago) It is very related to my job, would you please send me the presentation of heat rate audit in thermal power plant for my further learning? Thank you MH Saving..... Post Reply Close Saving..... Edit Comment Close By: vino.rose (15 month(s) ago) i want ovaer all extension of power plant working Saving..... Post Reply Close Saving..... Edit Comment Close By: slandge123 (15 month(s) ago) Dear sir Pl send this presentation to me on slandge@walchand.com thanks Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript HEAT RATE AUDIT IN THERMAL POWER PLANT : HEAT RATE AUDIT IN THERMAL POWER PLANT SHIVAJI CHOUDHURY HEAT RATE : HEAT RATE Heat rate is the heat input required per unit of power generated (kcal/kWh), for specific fuel being fired and specific site conditions. OBJECTIVE : OBJECTIVE To identify degradation in thermal performance of the unit and to point out the cause and location of power and efficiency losses BENEFIT -identification of losses : BENEFIT -identification of losses Efficiency increase Green house gases emission decrease Particulate emission reduction Availability improvement Reduction in O&M cost Less capacity addition Increase profitability LOSSES IN THERMAL POWER PLANT : LOSSES IN THERMAL POWER PLANT 1.Boiler losses 2.Turbine losses 3.Condensate/feed water system losses. 4.Circulating water system losses. 5.Steam conditions 6.Electrical auxiliary losses 7.Steam auxiliary losses 8.Fuel handing 9.Heat losses 1.BOILER LOSSES : 1.BOILER LOSSES 1.1.Moisture losses 1.2.Dry gas losses 1.3.Incomplete combustion 1.4.Radiation losses 1.1.Moisture losses : 1.1.Moisture losses High moisture in air Tube leaks Coal quality 1.2.Dry losses : 1.2.Dry losses Boiler casing air leakage Air pre heater leakage Incorrect fuel air ratio Fouled heat transfer surfaces 1.3.Incomplete Combustion : 1.3.Incomplete Combustion Coal quality Increased in ash contain Increased in carbon contain Decreased Coal mill fineness Classifier vanes improperly adjusted Ring/roller wear Classifier vane wear Burner tips plugged Burner damper settings Incorrect fuel air ratio. Hi oxygen at boiler out 2.TURBINE LOSSES : 2.TURBINE LOSSES 2.1.Mechanical damage Metallurgical defects Maintenance practices 2.2.Flow area decrease Mechanical blockage Blade deposits 2.3.Flow area bypass 2.4.Flow area increase 2.3. FLOW AREA BYPASS : 2.3. FLOW AREA BYPASS H P Turbine inlet bushing leakage Main steam valve leakage H P gland seal leakage IP steam /intercept valve leakage I P Turbine inlet bushing leakage 2.4. FLOW AREA INCREASE : 2.4. FLOW AREA INCREASE Spill strip or packing leakage. Rubbing Thermal stress Erosion of turbine stages. Solid particle erosion of nozzle block. Condenser leaks Poor water chemistry Blade mechanism damage. 3.CONDENSATE/F W SYSTEM LOSSES : 3.CONDENSATE/F W SYSTEM LOSSES CEP/BFP efficiency Shaft rub Impeller wear Flow resistance path increase LP/HP heaters (high TTD) Excessive tube plugged FW heater out/bypass FW heater level low 4.CIRCULATING WATER LOSSES : 4.CIRCULATING WATER LOSSES Air binding of condenser tubes Excessive air in leakage Inadequate air removal capacity Fouled condenser tubes Microfouling Plugged condenser tubes Air binding water box Low circulating water flow Increased CW system resistance Deceased CW pump performance 5.STEAM CONDITION : 5.STEAM CONDITION Firing conditions High super heater spray flow High re heater spray flow Inadequate heat transfer surface 6.ELECTRICAL AUXILIARY LOSSES : 6.ELECTRICAL AUXILIARY LOSSES Precipitator performance Ash deposit Excessive rapping High ash in coal Change in fan efficiency (ID,FD,PA) Coal Mill performance Classifier setting incorrect Coal quality 7.STEAM AUXILIARY LOSSES : 7.STEAM AUXILIARY LOSSES Excessive soot blowing Decreased in BFPT efficiency Low inlet steam temperature Excessive steam flow through vacuum pump Steam trap leaking Excessive usage of steam coil 8.FUEL HANDING : 8.FUEL HANDING Spillage from the belt/transport Coal pile erosion Wind erosion Water erosion Coal pile fire Measurement inaccuracies 9. HEAT LOSSES : 9. HEAT LOSSES Insulation missing Steam leakage Leaks to condenser Leakage through bypass lines/valves Leakage through vents and drains Leakage to blow down tank POWER PLANT EFFICIENCY : POWER PLANT EFFICIENCY Sub critical - 34% Super critical- 37% Ultra super critical 41% HEAT RATE OF TURBINE UNIT-Kcal/KWH : HEAT RATE OF TURBINE UNIT-Kcal/KWH 210 MW TURBINE(LMZ)- 2063 210 MW TURBINE (KWU)- 210 MW- 1952 168 MW - 2001 500 MW TURBINE (KWU)- 500 MW - 1945 400 MW- 1988 300 MW- 2063.2 250 MW - 2134.3 Example of 210 MW : Example of 210 MW Operating efficiency of unit is 37.5 %. Unit heat rate is 2305 Kcal/kwhr To produce 860 Kcal ( heat equivalent to one kwhr) ,2305 kcal heat has to supplied to boiler. Losses in the boiler- 266 kcal Losses in turbine generator- 1179 kcal Total losses-(266 +1179)= 1445 kcal Parameters monitor by most of the utilities : Parameters monitor by most of the utilities Condenser Back pressure Auxiliary power Excess oxygen Make up Unburned Coal moisture Main steam temp Main steam press HRH temp HRH press H P efficiency IP efficiency Boiler inlet feed water temp THANKING YOU : THANKING YOU