scholarly journals ANALISIS KINERJA TURBIN UAP UNIT 3 BERDASARKAN PERFORMANCE TEST DI UNIT PELAKSANA PT.PLN (PERSERO) PEMBANGKITAN ASAM-ASAM

JTAM ROTARY ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 95
Author(s):  
Kemas Ronand Mahaputra
Keyword(s):  
Performance Test ◽  
Heat Rate ◽  
Steam Pressure ◽  
Outlet Temperature ◽  
Steam Turbines ◽  
Turbine Efficiency ◽  
Rate Calculation ◽  
Temperature And Pressure ◽  
Main Steam ◽  
Unit Unit

This study purpose to determine the performance of steam turbines Unit 3 of PT.PLN (Persero) Pembangkitan Asam-asam by comparing the results of the data obtained by each performance test. This research was carried out by taking data performance tests in 2012, 2017, 2018 and 2019 and then processing the data and obtaining turbine heat rate values and average turbine efficiency then comparing the values obtained in each year. The data taken is obtained from the rendal operation of PT.PLN (Persero) Pembangkitan Asam-asam, data variables taken are load, main steam temperature inlet, main steam pressure inlet, HP heater feed outlet temperature, HP heater outlet pressure, main steam flow. Temperature and pressure obtained are then searched for enthalpy values. The data obtained to calculate the value of the turbine heat rate and turbine efficiency on average per time from each performance test then averages the value of the turbine heat rate and turbine efficiency each time the data collection performance test is then compared with the data each year.The calculation of the turbine heat rate uses the heat & mass balance method by measuring the value of the incoming and outgoing fluid differences and comparing the load obtained, the efficiency of the turbine is obtained by dividing the energy of 1 kW with a turbine heat rate then multiplying by 100%. The average turbine heat rate calculation result for each performance test which is on May 23, 2012 is 2,701, October 27, 2017 is 3,136, September 5, 2018 is 3,005, May 21, 2019 is 3,113. The average turbine efficiency value on May 23, 2012 is 37.02%, October 27 2017 is 31.39%, September 5 2018 is 33.28%, May 21, 2019 is 32.12%. The performance of PT PLN (Persero) Pembangkit Asam-asam Implementing Unit Unit 3 has decreased from 2012 to 2019 which is 4.9%

scholarly journals ANALISIS EFISIENSI TURBIN UAP UNIT 1 DI PT. PJB UBJOM PLTU PULANG PISAU KALIMANTAN TENGAH

JTAM ROTARY ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 57
Author(s):  
Edi Saputro
Keyword(s):  
Performance Test ◽  
Heat Rate ◽  
Steam Pressure ◽  
Plant Performance ◽  
Outlet Temperature ◽  
Steam Temperature ◽  
Control Room ◽  
Average Value ◽  
Turbine Efficiency ◽  
Main Steam

This study aims to determine the performance of steam turbine PT. PJB UBJOM PLTU Pulang Pisau Kalimantan Tengah the results of data obtained during each performance test in commisioning 2016 and 2018. This research data is taken from the control room of PT. PJB UBJOM PLTU Pulang Pisau, variable data obtained in the form of load, main inlet steam temperature, main inlet steam pressure, HP heater feed outlet temperature, HP heater feed outlet pressure, main steam flow, and turbine by pass flow. The data is processed to get the turbine heat rate and the efficiency per time of each performance test and then averaging the data results over time, then comparing the turbine heat rate and the average efficiency of each performance test. The calculation of turbine heat rate using heat & mass balance method, turbine efficiency is obtained by comparing the energy of 1 kW with turbine heat rate and multiplying 100%. The result of the average heat turbine calculation per performance test highest ie September 2016 is 3,51and Juli 2018 is 3,27. The average value of turbine efficiency in September 2016 was 29,03% and Juli 2018 was 33,84. Turbine power plant performance of PT. PJB UBJOM PLTU Pulang Pisau increase from 2016 to 2018 by 4,81 %.Keywords:Turbin Heat Rate, Efisiensi Turbin

scholarly journals ANALISIS KINERJA TURBIN UAP BERDASARKAN PERFORMANCE TEST PLTU PT. INDOCEMENT P-12 TARJUN

2016 ◽  
Vol 1 (1) ◽  
pp. 37-46
Author(s):  
Riyki Apriandi ◽  
Aqli Mursadin
Keyword(s):  
Performance Test ◽  
Heat Rate ◽  
Steam Pressure ◽  
Plant Performance ◽  
Outlet Temperature ◽  
Steam Temperature ◽  
Control Room ◽  
Average Value ◽  
Turbine Efficiency ◽  
Main Steam

This study aims to determine the performance of steam turbine PT. Indocement Tarjun Plant 12 by comparing the results of data obtained during each performance test in 1999, 2016, 2017, and 2018. This research data is taken from the control room of PT. Indocement Tarjun, variable data obtained in the form of load, main inlet steam temperature, main inlet steam pressure, HP heater feed outlet temperature, HP heater feed outlet pressure, main steam flow, and turbine by pass flow. The data is processed to get the turbine heat rate and the efficiency per time of each performance test and then averaging the data results over time, then comparing the turbine heat rate and the average efficiency of each performance test. The calculation of turbine heat rate using heat & mass balance method, turbine efficiency is obtained by comparing the energy of 1 kW with turbine heat rate and multiplying 100%. The result of the average heat turbine calculation per performance test ie August 1999 is 2.546, April 2016 2,537, June 2017 2.56, and May 2018 2.67. The average value of turbine efficiency in August 1999 was 39.30%, April 2016 39.43%, June 2017 39.07%, May 2018 37.46%. Turbine power plant performance of PT Indocement Tarjun Plant 12 decreased from 1999 to 2018 by 1.84%.

Changing Fossil Unit Startup Process Reduces Rotor Stresses

2008 ◽  
Author(s):  
Craig Jennings
Keyword(s):  
Thermal Stresses ◽  
Energy Market ◽  
Steam Turbines ◽  
Steam Temperature ◽  
Thermally Induced ◽  
Start Up ◽  
Hot Start ◽  
Startup Process ◽  
Temperature And Pressure ◽  
Main Steam

The changes in the energy market dispatching and pricing, have increased the need to start fossil steam turbines faster to meet demand and save fuel. Exelon worked with a consultant to optimize the start up times of their steam turbines resulting in greatly reduced start up times, increased dispatching frequency, and reduced thermal stresses on the turbines. This optimized start up process was achieved by utilization of the Valve Open Start (VOS) and Accelerated Hot Start (AHS) process. VOS utilizes condenser vacuum aligned to the steam generator to produce superheated steam at much lower temperatures and pressures than usual. This steam is drawn through the turbine to warm the unit while the boiler increases in temperature and pressure. The AHS changes the startup sequence of operations by setting up the turbine in a manner that allows the turbine to roll at precisely the time that a perfect temperature match is obtained between the main steam temperature and first stage metal temperature. The use of these processes significantly increases profitability of the units and meets all OEM criteria for unit protection and results in a reduction in rotor thermal gradient, temperature mismatch, and thermally induced vibration.

PF-fired supercritical power plant

2003 ◽  
Vol 217 (1) ◽  
pp. 35-43 ◽  
Author(s):  
P. E. Chew
Keyword(s):  
Steam Pressure ◽  
The State ◽  
Operating Conditions ◽  
Steam Turbines ◽  
Pulverized Fuel ◽  
Furnace Tube ◽  
Combustion Technology ◽  
Under Construction ◽  
Main Steam ◽  
Plant Efficiency

Pulverized fuel firing is the dominant application of supercritical steam cycles. This has been driven by the aims of efficiency improvement and reduction in environmental emissions. The sensitivity of supercritical steam plant to operating conditions is reviewed and the improvements in operating plant efficiency achieved through increase in steam pressure and temperatures and other factors such as auxiliary power demand is illustrated. Steam temperatures have increased by about 40°C during the 1990s and this, together with an increase in main steam pressure and cycle improvement, have led to a net efficiency of 45 per cent (reduced to UK conditions) for the state-of-the-art plant at present. Plants with still more advanced conditions are under construction or are planned, with the prospect of plant efficiency of 50 per cent in the future. This will rely on continued improvement in materials and is supported by a number of European programmes. Some main difficulties in the design of boilers with advanced temperatures, in particular steam temperature at the furnace outlet, furnace tube arrangement, and materials for superheater and reheater outlet sections, are discussed and the state of advanced steam turbines is reviewed. The operational availability of the supercritical plant, at least in Europe, has improved such that it is little different to the subcritical plant. Similarly, significant improvements have been made in controlling emissions by refinement of flue gas clean-up systems and combustion technology.

scholarly journals Economic and Financial Analysis of Cofiring the Coal Fired Steam Power Plant Capacity 660 MW with Biomass (

2021 ◽  
Vol 1 (1) ◽  
pp. 27-30
Author(s):  
Widya Faisal Wahyudi ◽  
Iwa Garniwa M.K.
Keyword(s):  
Power Plant ◽  
Financial Analysis ◽  
Steam Pressure ◽  
Quality Standard ◽  
Electricity Production ◽  
Outlet Temperature ◽  
Solar Pv ◽  
Coal Price ◽  
Main Steam ◽  
The Cost

Research on Cofiring of the Existing Coal Fired Power Plant with biomass in the form of sawdust with a mixture percentage of 5% was carried out with the main objective of pursuing the acceleration of the renewable energy mix target of 23% (Green Booster) by 2025, with minimal CAPEX costs if compared to building new hydro or solar PV plants. At the initial stage of the activity, testing and analysis of the effect of cofiring will be carried out on several main parameters of the Existing PLTU's performance, as well as its reliability. In addition, it is also at the same time to get an overview and evaluate if the cofiring plan will be implemented through technical operational evaluations, the cost of production from the aspect of fuel costs (component C) and exhaust emissions to the environment. From the results of monitoring the operating load at around 635 MW (gross) using 5% cofiring, it can be seen that critical points such as main steam temperature, main steam pressure, gas economizer outlet temperature, mill outlet temperature do not show a significant increase, meaning they are still within the operating limits, reasonable and safe. From the calculation of the cost of fuel, the coal price is IDR 594 per kg, and sawdust price of IDR 472 per kg (on site) using the SFC difference of 0.0077 kg/kwh, and the CF assumption of 80%, then with an average annual electricity production of 4,415,040,000 kwh/year, fuel savings of around IDR 35.32 billion per year will be obtained. Exhaust gas emissions to the environment for SO2 and NOx still meet the environmental quality standard requirements according to the Minister of Environment and Forestry Regulation No.15 of 2019.

Analysis of reliability of design of stop valve of steam turbin

2019 ◽  
Vol 12 (3) ◽  
pp. 206-212
Author(s):  
V. N. Goloshumova ◽  
Yu. M. Brodov
Keyword(s):  
Heated Surface ◽  
Geometric Model ◽  
Three Dimensional ◽  
Steam Pressure ◽  
Steam Turbines ◽  
Valve Body ◽  
Stop Valve ◽  
Main Steam Line ◽  
Main Steam ◽  
Slit Filter

The stop valve is one of the «critical» elements of the steam turbine installation, the heating conditions of which determine the reliability of the power unit as a whole. The stop valve for cogeneration steam turbines of subcritical parameters of "UTZ" is unified for familiesT-110/120-130, T-185/210-130/15, ПT-140/165-30/15, P-100-130/15. The sequence of analysis of the valve design is presented for conditions, where only the static temperature and steam pressure at the inlet to the valve, the steam flow rate at the outlet of it, the restrictions for movement during heating are known. The results of the analysis of calculations of unsteady gas-thermodynamic and stress-strain state of the valve during the heating of the main steam line of the turbine T-110/120-130 from the cold state according to the standard instructions are shown. The calculations were carried out by the finite element method using a three-dimensional geometric model of the valve body with a slit filter. The height of the holes in the slit filter is 3.5 mm. The equations of the Nusselt criterion for the flange, the steam box, the lower half of the steam box and the fairing when using computers with limited computing resources are presented. It is shown that the peak of the maximum stresses occurs at the initial stage of the stop valve warming up on the inner (heated) surface of the stop valve body in the area of the flange and the cover. The maximum equivalent stresses are 300 MPa. The comparison of calculated temperatures and temperatures measured during the start-up at the CHP is presented; the temperature difference does not exceed 5–6%. It is proposed to analyze the stop valve reliability with a sequence given in this article in the design of new stop valves with significant differences from the existing prototypes.

Testing Steam Turbines in Combined Cycle Applications

2005 ◽  
Author(s):  
Michael P. McHale ◽  
Kevin D. Stone
Keyword(s):  
Steam Turbine ◽  
Performance Test ◽  
Heat Rate ◽  
Rankine Cycle ◽  
Combined Cycle ◽  
Test Results ◽  
Steam Turbines ◽  
Output Performance ◽  
Combined Cycles ◽  
Test Instrumentation

ASME Performance Test Code 6.2 for testing of Steam Turbines in Combined Cycle Applications has been approved by the Board of Performance Test Codes and will be issued in 2005. PTC 6.2 provides procedures for the accurate testing of a steam turbine in a Combined Cycle application with or without supplementary firing and in cogeneration applications. The procedures for testing a Rankine cycle steam turbine in a Combined Cycle application differ from those used to test a Rankine cycle steam turbine in a cycle with regenerative feedwater heating because of differences in cycle configuration and test objectives. PTC 6.2 provides procedures for testing and calculating corrected turbine-generator output performance, not corrected heat rate. The Code contains rules and procedures for the conduct and reporting of steam turbine testing, including requirements for pretest arrangements, testing techniques, instrumentation, methods of measurement, and methods for calculating test results and uncertainty. This paper will focus on challenges that have been faced with conducting performance tests on steam turbines in combined cycles in the past, and how the Code has addressed these challenges. Challenges are driven primarily by the cycle configuration, operating practices, and the basis of guarantees. Subjects to be addressed in the paper include test instrumentation, test objectives, test calculations, and test uncertainty.

Evaluation of Si Coating on Ferritic Steels by CVD-FBR Technology in Steam Oxidation

2009 ◽  
Vol 289-292 ◽  
pp. 413-420 ◽  
Author(s):  
F.J. Bolívar ◽  
L. Sánchez ◽  
M.P. Hierro ◽  
F.J. Pérez
Keyword(s):  
Power Plants ◽  
Protective Coatings ◽  
Steam Oxidation ◽  
Steam Turbines ◽  
X Ray Diffraction ◽  
Steam Power ◽  
Factors Affecting ◽  
Steam Power Plants ◽  
Temperature And Pressure ◽  
Major Factors

The development of new power generation plants firing fossil fuel is aiming at achieving higher thermal efficiencies of the energy conversion process. The major factors affecting the efficiency of the conventional steam power plants are the temperature and, to a lesser extent, the pressure of the steam entering the turbine. The increased operating temperature and pressure require new materials that have major oxidation resistance. Due to this problem, in the last years numerous studies have been conducted in order to develop new coatings to enhance the resistance of steels with chromium contents between 9 and 12% wt against steam oxidation in order to allow operation of steam turbines at 650 0C. In this study, Si protective coatings were deposited by CVD-FBR on ferritic steel P-91. These type of coatings have shown to be protective at 650 0C under steam for at least 3000 hours of laboratory steam exposure under atmospheric pressure. Morphology and composition of coatings were characterized by different techniques, such as scanning electron microscopy (SEM), electron probe microanalysis, and X-ray diffraction (XRD). The results show a substantial increase of steam oxidation protection afforded by Si coating by CVD-FBR process.

Optimization of a Sintering Waste Heat Power Unit

2014 ◽  
Vol 1008-1009 ◽  
pp. 897-900
Author(s):  
Xue Min Gong ◽  
Jiu Lin Yang ◽  
Chen Wang
Keyword(s):  
Power Generation ◽  
Power Unit ◽  
Waste Heat ◽  
Steam Pressure ◽  
Operating Conditions ◽  
Parameters Optimization ◽  
Heat Power ◽  
Optimal Value ◽  
Generation Capacity ◽  
Main Steam

An optimization was performed for a sintering waste heat power unit with all data obtained in the site and under the unit normal operating conditions. The physical and mathematical model for the process of cooling and generation is established, which makes the net power generation as an objective function of the cooling machine imported ventilation, the thickness of sinter and the main steam pressure. Optimizing for single parameter, we found that each parameter had an optimal value for the system. In order to further optimize the system's operating parameters, genetic algorithm was used to make the combinatorial optimization of the three parameters. Optimization results show that power generation capacity per ton is increased by13.10%, and net power generation is increased by 16.17%. The optimization is instructive to the operation of sintering waste heat power unit.

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