Operating Economic Analysis on Multi-Plans of Boiler Feedwater Pump under Variable Flow

2007 ◽  
pp. 1314-1319
Author(s):  
Sike Hu ◽  
Tai Lu ◽  
Weiran Wang
Keyword(s):  
Economic Analysis ◽  
Variable Flow ◽  
Feedwater Pump ◽  
Boiler Feedwater

scholarly journals ANALISIS PENGARUH VIBRASI TERHADAP PERFORMA BOILER FEEDWATER PUMP (BFP) 3B PLTU ASAM ASAM

JTAM ROTARY ◽  
2020 ◽  
Vol 2 (2) ◽  
pp. 235
Author(s):  
Yanuar Iswahyudi
Keyword(s):  
Electric Power ◽  
Continuous Operation ◽  
Total Efficiency ◽  
Calculation Data ◽  
Feedwater Pump ◽  
Boiler Feedwater

Pada Desember 2016 hingga Januari 2017, terjadi penurunan kinerja PLTU Asam Asam Unit 3 yang signifikan dalam penyediaan tenaga listrik. Hal ini dikarenakan adanya permasalahan pada Boiler Feedwater Pump (BFP) 3B. Kemudian masalah harus diselesaikan oleh Turbin dan Kru Pemeliharaan Tambahan dengan beberapa perbaikan. Perbaikan BFP 3B berada pada masalah jarak jalan internal dan masalah poros tekuk. Setelah diperbaiki, data perhitungan menunjukkan bahwa efisiensi total pompa meningkat sebesar 10%, dan zona getaran berpindah dari zona D (berbahaya) ke zona A (aman untuk pengoperasian berkelanjutan). In December 2016 until January 2017, there was a significant decreasing performance of Unit 3 PLTU Asam Asam in supplying electric power. This was because of some problems in Boiler Feedwater Pump (BFP) 3B. Then the problems have to be solved by the Turbine and Auxiliary Maintenance Crew by some repairs. The repair of BFP 3B are in the internal running clearance problem and bending shaft problem. After the repair of them, calculation data show that the pump total efficiency increasing by 10 %, and the vibration zone move from D zone (dangerous) to A zone (safe for continuous operation).

Efficiency Optimization of a 30MW Main Boiler Feedwater Pump Using CFD and Scaled Model Tests

2013 ◽  
Author(s):  
Pieter Teesink ◽  
Frank Visser ◽  
Jeroen Jochems
Keyword(s):  
Carbon Dioxide Emissions ◽  
Power Plants ◽  
Thermal Power ◽  
Model Tests ◽  
Electricity Production ◽  
Scaled Model ◽  
Design Constraint ◽  
Feedwater Pump ◽  
Energy Consuming ◽  
Boiler Feedwater

Environmental impact of electricity production has come under increasing international scrutiny over the last few decades. In particular, fossil fuel-fired power plants constitute a significant portion of the world’s carbon dioxide emissions. One of the main internal energy-consuming components in a thermal power plant is the main boiler feedwater pump, and its efficiency is a contributor to overall plant efficiency. This paper reports the design optimization of a 30 MW multistage, double-case, volute pump in order to increase overall efficiency by at least three percentage points. The six stage barrel pump produces 3865 m (12680 ft) of head at a capacity of 2750 m3/hr (12100 USGPM) at a speed of 4665 RPM. The machine is installed at the coal-fired supercritical Nuon Hemweg 8 power station in Amsterdam, the Netherlands, as the main boiler feedwater pump. The design study employed Computational Fluid Dynamics (CFD) to identify energy losses and evaluate design iterations. This paper describes the optimization of several individual components, including volutes, short and long crossovers, suction box and final discharge. Scaled model tests were conducted on series stages to validate the CFD results. Additional design constraint that had to be taken into account was that new hardware had to be installed within the limits of the existing pressure boundary components, sealing device and bearing design, which confines the design space considerably. Hardware has, at the time of writing this paper, entered production and is planned to be installed during a May 2013 plant outage.

Feasibility study of the energy and economic gain that can be achieved by driving the boiler feedwater pump with a backpressure steam turbine

2020 ◽  
pp. 095765092096946
Author(s):  
Selcuk Selimli ◽  
Savas Sunay
Keyword(s):  
Steel Production ◽  
Low Pressure ◽  
Production Plant ◽  
Pressure Reduction ◽  
Iron And Steel ◽  
Feedwater Pump ◽  
Pressure Steam ◽  
Iron And Steel Production ◽  
Wasted Energy ◽  
Boiler Feedwater

The low-pressure steam requirement in the iron and steel production plant is obtained through pressure reduction stations with unrestrained expansion. In this study, the feasibility of obtaining the low-pressure steam that is needed in the plant in a backpressure turbine instead of pressure reduction stations has been studied. In this way, it is foreseen that a significant amount of wasted energy during the unrestrained expansion in pressure reduction stations, can be recovered as shaft work during the expansion process performed in the turbine. The obtained shaft work is planned to be used in the boiler feedwater pump drive. It is aimed to increase the efficiency of the system by the deactivation of boiler feedwater pump electric motors and as well as bringing the energy that is lost during the unrestrained expansion of the superheated steam to the system through the pump drive. The estimated size of energy saving of the system could be reached to 33.74%. The annual size of achievable saving has been determined by approximately 8,094,810 kWh and economically $509,973. The payback period of the estimated $683,079 investment is 1.34 years. A determined amount of saving is also equivalent to the reduction of 7,285,329 kg CO2 emission, annually.

Field Demonstration of a Boiler Feedwater Pump Upgraded to Reduce Vibration and Acoustic Emissions Without Compromising Performance

2000 ◽  
Author(s):  
John F. Marchi ◽  
R. Frank Bush
Keyword(s):  
Acoustic Emissions ◽  
High Energy ◽  
Hydraulic Performance ◽  
Centrifugal Pumps ◽  
Steam Generation ◽  
Pump Design ◽  
Multi Stage ◽  
Feedwater Pump ◽  
Wide Range ◽  
Boiler Feedwater

Abstract The high-energy boiler feedwater pump is the heart of the steam-generation cycle in modern high-pressure boiler systems. These multi-stage centrifugal pumps are engineered to produce system pressures from 12 MPa (1800 lb/in2) to 45 MPa (6500 lb/in2) at temperatures ranging from 150°C (300°F) to 312°C (600°F). To optimize pump hydraulic performance, pump designers have focused on impeller and diffuser vane angles, hydraulic passageway shapes and minimized impeller-to-diffuser vane clearances to maximize performance within a narrow range of operation. This was the approach that had been applied successfully on lower energy pump design of an earlier era. However, in the mid-1980s, in response to market forces, operators began to cycle and operate plants over a wide range of loads, which was contrary to the original plant designs. This new operating paradigm has resulted in unacceptable vibration and acoustic emissions that are often attributable to impeller-to-diffuser vane interaction (a result of the minimized clearances referenced previously). Efforts to reduce these emissions by changing the design must always be balanced with the potential impact on hydraulic performance. This paper uses operating field data taken from boiler feedwater pumps to prove that by: • optimizing hydraulic passageways and • changing the internal geometry, specifically, impeller-to-diffuser vane combinations, vibration and acoustic emissions are reduced without compromising hydraulic performance.

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