scholarly journals THERMAL LOSSES EVALUATION IN 660 MW COAL-FIRED POWER PLANT USING INDIRECT EFFICIENCY METHOD

2021 ◽  
Vol 19 (01) ◽  
Author(s):  
Muhammad Rizaldi Zaman ◽  
Nazaruddin Sinaga
Keyword(s):  
Energy Balance ◽  
Power Plant ◽  
Heat Loss ◽  
Performance Testing ◽  
Standard Test ◽  
Performance Evaluations ◽  
Efficiency Evaluation ◽  
Performance Tests ◽  
Energy Balance Method ◽  
Boiler Efficiency

Boilers are one of the main equipment in the PLTU apart from turbines and generators. Each year there must be a difference in the actual boiler efficiency value with the conditions during commissioning. Periodically, boiler performance evaluations are carried out in order to identify losses from several factors. In this study, the method used for evaluation is the energy balance method. During the experiment, the standard test guide (ASME PTC - 4) was used. The boiler under test has a capacity of 660 MW. Evaluation is done by comparing the boiler efficiency value at the time of commissioning with the latest performance tests. From the results of performance testing, it is known that the decrease in boiler efficiency when compared with the commissioning results from 86.92% to 82.625%. The reduction in boiler efficiency is due to an increase in heat loss due to dry gas, hydrogen content in coal, and incomplete combustion.Keywords: boiler, efficiency, evaluation, reduction, performance

scholarly journals ANALISIS KINERJA BOILER PEMBANGKIT LISTRIK TENAGA UAP ASAM ASAM UNIT II – KALIMANTAN SELATAN

JTAM ROTARY ◽  
2020 ◽  
Vol 2 (1) ◽  
pp. 109
Author(s):  
Asep Mohamad ◽  
Rachmat Subagyo
Keyword(s):  
Power Plant ◽  
Heat Loss ◽  
Flue Gas ◽  
Performance Test ◽  
Heat Losses ◽  
Steam Power ◽  
Boiler Efficiency ◽  
Calculation Results ◽  
Current Value ◽  
Loss Method

Penelitian ini bertujuan untuk mengetahui nilai efisiensi boiler komisioning dibandingkan dengan nilai saat ini dan untuk mengetahui penyebab penurunan efisiensi pada Unit 2 Boiler Asam PLTU. Penelitian ini dimulai dengan mengumpulkan data Uji Kinerja selama commissioning dan data empat tahun saat ini dari 2014 hingga 2018. Selanjutnya, kehilangan panas yang dilakukan dihitung dan dibandingkan. Perhitungan dilakukan menggunakan ASME PTC 4-2008 Metode Kehilangan Panas Standar. Berdasarkan hasil perhitungan, dapat disimpulkan bahwa nilai Efisiensi Boiler base HHV tertinggi di Unit 2 PLTU Asam Asam adalah 86,23% pada Commissioning dan nilai Efisiensi Boiler Base HHV tertinggi kedua adalah 84,42% pada 9 Agustus 2017, sementara Efisiensi Boiler pangkalan HHV terendah adalah 82,12% pada 2 Oktober 2014. Kehilangan panas yang paling mempengaruhi efisiensi Boiler Unit 2 adalah Kehilangan Panas karena Panas dalam Gas Buang Kering (5,79% - 7,96%), Kehilangan Panas karena Kelembaban dalam Bahan Bakar (4,07% - 5,57)%) dan Kehilangan Panas karena Kelembaban dari Pembakaran Hidrogen dalam Bahan Bakar (3,85% - 5,04%). This study aims to determine the value of commissioning boiler efficiency compared with current value and to know the causes of efficiency decrease in Unit 2 Boiler of Asam Asam Coal Fired Steam Power Plant. This research begins with collecting data of Performance Test during commissioning and current four years data from 2014 until 2018. Furthermore, heat losses that carried out are calculated and compared. Calculations performed using ASME PTC 4-2008 Standard Heat Loss Method. Based on the calculation results, it can be conclude that the highest HHV base Boiler Efficiency value in Unit 2 of Asam Asam Power Plant is 86.23% at Commissioning and the second highest HHV Base Boiler Efficiency value is 84.42% on August 9, 2017, while the lowest HHV base Boiler Efficiency is 82.12% on October 2, 2014. Heat loss that most affects the efficiency of Unit 2 Boiler is Heat Loss due to Heat in Dry Flue Gas (5.79% - 7.96%), Heat Loss due to Moisture in Fuel (4.07% - 5.57) %) and the Heat Loss due to Moisture from Burning of Hydrogen in Fuel (3.85% - 5.04%).

Comparing Boiler Efficiency Calculation Methods

2011 ◽  
Author(s):  
David A. T. Rodgers ◽  
Timothy Golightly ◽  
Marc E. Lemmons ◽  
William C. Stenzel ◽  
Fred D. Lang
Keyword(s):  
Energy Balance ◽  
Test Data ◽  
Test Methods ◽  
Calculation Methods ◽  
Energy Balance Method ◽  
Efficiency Calculation ◽  
Boiler Efficiency ◽  
Calculation Methodology ◽  
Loss Method ◽  
San Rafael

This paper compares two methods for calculating boiler efficiency using test data obtained from the Boardman Coal Plant. The two test methods are ASME PTC 4’s Energy Balance Method as evaluated by Sargent & Lundy LLC, Chicago, IL, and the Input/Loss Method as evaluated by its owner, Exergetic System Inc., San Rafael, CA. The differences in methods are fundamental: varying in basic definitions of boiler efficiency and calculation methodology.

scholarly journals Performance and boiler efficiency using low-grade coal on 400 MWe coal-fired power plant: case study of Suralaya Power Plant Unit 2

2021 ◽  
Vol 882 (1) ◽  
pp. 012033
Author(s):  
Eko Supriyanto ◽  
Nur Cahyo ◽  
Ruly Sitanggang ◽  
Rasgianti ◽  
Meiri Triani ◽  
...  
Keyword(s):  
Power Plant ◽  
Heat Loss ◽  
Heat Rate ◽  
Calorific Value ◽  
Plant Performance ◽  
Low Grade ◽  
Hydrogen Burning ◽  
Steam Power ◽  
Boiler Efficiency ◽  
Loss Method

Abstract In a coal steam power plant, changes in coal quality significantly affect plant performance, especially in its boiler. A coal-fired power plant with a capacity of 400 MWe had been commissioned using coal with a calorific value of 5,242 kCal/kg. This study aims to determine the effect on unit performance and boiler efficiency due to changes in fuel use with the typical calorific value of 3,520 kCal/kg, 34,17% lower than the initial design. The performance tests were conducted using the heat loss method at loads: 50%, 65%, 75%, and 100%. The test result showed that using low-grade coal reduces boiler efficiency by 6.26%. There were four dominant boiler losses: heat loss due to moisture in dry flue gas, heat loss due to combustible in refuse, heat loss due to moisture in fuel, and heat loss due to hydrogen burning. Furthermore, the gross plant heat rate using low-grade coal was increased from 2,120 kCal/kWh to 2,718 kCal/kWh; however, the electric price becomes cheaper from 1.99 cent-USD/kWh becomes 1.31 cent-USD/kWh.

Determination of Fuel Input for a Coal Fired Plant Performance Test

2009 ◽  
Author(s):  
H. Jin
Keyword(s):  
Energy Balance ◽  
Heat Loss ◽  
Steam Generator ◽  
Heat Input ◽  
Short Form ◽  
Fuel Efficiency ◽  
Balance Method ◽  
Plant Performance ◽  
Energy Balance Method ◽  
Loss Method

In applying ASME PTC 46 “Overall Plant Performance” to a coal-fired steam plant, it is mandated that the heat input to the plant is determined by the product of heat input to the steam and the inverse of the steam generator fuel efficiency. Steam generator fuel efficiency is to be determined, per PTC 46, by the energy balance method as detailed in ASME PTC 4 “Fired Steam Generators”. ASME PTC 4 (1998) superseded an earlier Code, ASME PTC 4.1, which is no longer an ANSI standard or an ASME Code (as this paper was being written, PTC 4- 2008 has been published as a revision of PTC 4-1998). PTC 4.1 made use of a simplified “short form” to determine efficiency by what was known as the heat loss method, used by the industry for many years due to its ease of use. The energy balance method is fundamentally different from the heat loss method even in terms of the definition of efficiency and heat input. This paper explores the major differences between the two PTC’s (the defunct PTC 4.1 and PTC 4). Without knowing these differences, a direct comparison of PTC 4 and PTC 4.1 results is meaningless and could lead to false conclusions.

Thermal Performance on Unglazed Photovoltaic Thermal Polymer Collector

2014 ◽  
Vol 911 ◽  
pp. 238-242
Author(s):  
Mohd Afzanizam Mohd Rosli ◽  
Sohif Mat ◽  
Kamaruzzaman Sopian ◽  
Mohd Yusof Sulaiman ◽  
Elias Ilias Salleh ◽  
...  
Keyword(s):  
Energy Balance ◽  
Heat Loss ◽  
Thermal Performance ◽  
Thermal Efficiency ◽  
Heat Removal ◽  
Heat Energy ◽  
Balance Method ◽  
Energy Balance Method ◽  
Thermal Polymer

In this study, the thermal efficiency of a polymer collector with unglazed photovoltaic thermal (PVT) system was determined. Overall heat loss was estimated using the heat energy balance method. Based on the analysis, the heat removal factor of the PVT system was found to be 0.55. The thermal performance of the system was 47% during the zero reduce temperature. The unglazed PVT polymer collector could replace the conventional PVT collector, which encountered problems such as high cost, weighting issues, and corrosion.

scholarly journals Identification of Quantitative Trait Loci Influencing Traits Related to Energy Balance in Selection and Inbred Lines of Mice

Genetics ◽  
1999 ◽  
Vol 152 (2) ◽  
pp. 699-711 ◽  
Author(s):  
D E Moody ◽  
D Pomp ◽  
M K Nielsen ◽  
L D Van Vleck
Keyword(s):  
Quantitative Trait Loci ◽  
Energy Balance ◽  
Heat Loss ◽  
Quantitative Trait ◽  
Subcutaneous Fat ◽  
High Heat ◽  
Chromosome 1 ◽  
Direct Calorimetry ◽  
Resource Population ◽  
Trait Loci

Abstract Energy balance is a complex trait with relevance to the study of human obesity and maintenance energy requirements of livestock. The objective of this study was to identify, using unique mouse models, quantitative trait loci (QTL) influencing traits that contribute to variation in energy balance. Two F2 resource populations were created from lines of mice differing in heat loss measured by direct calorimetry as an indicator of energy expenditure. The HB F2 resource population originated from a cross between a noninbred line selected for high heat loss and an inbred line with low heat loss. Evidence for significant QTL influencing heat loss was found on chromosomes 1, 2, 3, and 7. Significant QTL influencing body weight and percentage gonadal fat, brown fat, liver, and heart were also identified. The LH F2 resource population originated from noninbred lines of mice that had undergone divergent selection for heat loss. Chromosomes 1 and 3 were evaluated. The QTL for heat loss identified on chromosome 1 in the HB population was confirmed in the LH population, although the effect was smaller. The presence of a QTL influencing 6-wk weight was also confirmed. Suggestive evidence for additional QTL influencing heat loss, percentage subcutaneous fat, and percentage heart was found for chromosome 1.

scholarly journals Synthesis of ZSM-5 zeolites from biomass power plant ash for removal of ionic dyes from aqueous solution: equilibrium isotherm, kinetic and thermodynamic analysis

RSC Advances ◽  
2021 ◽  
Vol 11 (36) ◽  
pp. 22365-22375
Author(s):  
Guangbing Liang ◽  
Yanhong Li ◽  
Chun Yang ◽  
Xun Hu ◽  
Qingyin Li ◽  
...  
Keyword(s):  
Power Plant ◽  
Performance Testing ◽  
Value Added ◽  
Adsorption Performance ◽  
Original Intention ◽  
Power Plant Ash ◽  
Kinetic And Thermodynamic Analysis ◽  
Biomass Power Plant ◽  
First Time ◽  
Plant Ash

In this work, industrial biomass power plant ash was used to synthesize the ZSM-5 zeolites for the first time with the original intention to turn value-added material into wealth, and then committed to adsorption performance testing.

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