PERTANIKA JOURNAL OF SCIENCE AND TECHNOLOGY

Evaluating Coal-Fired Power Plant (CFPP) performance is a complex process involving the determination of the turbine cycle Heat Rate (TCHR). This study focuses on determining the TCHR by developing a mathematical model. The model, which incorporates economic analysis of the plant, is developed using energy and mass balance relationships of the turbine cycle, validated using plant commissioning data from a 700MWn CFPP located in Perak, Malaysia. Actual plant data from a 700MWn CFPP is utilized to improve the accuracy and increase the confidence of the results of this study. It was found that at the nominal operating load of 729MWg, there is a Heat Rate (HR) deviation of -1,135 kJ/kWh, leading to daily losses of RM240,447 or USD 60,112. Furthermore, it is possible to utilize the developed model at lower loads as the plant is now being used to operate on “cyclic” loads. The daily losses at a lower load of 431MWg are RM125,767 or USD31,442. Thus, the model is able to compare the plant HR at various loads against commissioning data, and economic analysis is able to be carried out effectively. Valuable information for plant operations and performance engineers could be obtained using this model to determine plant HR.

• Almedilla, J. R., Pabilona, L. L., & Villanueva, E. P. (2018). Performance evaluation and off design analysis of the HP and LP feed water heaters on a 3 × 135 MW coal fired power plant. Journal of Applied Mechanical Engineering, 7(3), 1-14. https://doi.org/10.4172/2168-9873.1000308

• Behbahaninia, A., Ramezani, S., & Hejrandoost, M. L. (2017). A loss method for exergy auditing of steam boilers. Energy, 140, 253-260. https://doi.org/10.1016/j.energy.2017.08.090

• Bisercic, A. Z., & Bugaric, U. S. (2021). Reliability of baseload electricity generation from fossil and renewable energy sources. Energy and Power Engineering, 13, 190-206. https://doi.org/10.4236/epe.2021.135013

• Braun, S. (2021). Improving flexibility of fossil fired power plants. In Reference Module in Earth Systems and Environmental Sciences. Elsevier. https://doi.org/10.1016/B978-0-12-819723-3.00085-8

• Buckshumiyanm, A., & Sabarish, R. (2017). Performance analysis of regenerative feedwater heaters in 210 MW thermal power plant. International Journal of Mechanical Engineering and Technology, 8(8), 1490-1495.

• Bujang, A. S., Bern, C. J., & Brumm, T. J. (2016). Summary of energy demand and renewable energy policies in Malaysia. Renewable and Sustainable Energy Reviews, 53, 1459-1467. https://doi.org/10.1016/j.rser.2015.09.047

• Devandiran, E., Shaisundaram, V. S., Ganesh, P. B., & Vivek, S. (2016). Influence of feedwater heaters on the performance of coal fired power plants. International Journal of Latest Technology in Engineering, Management & Applied Science, 5(3), 115-119.

• Fuzi, N. F. A., Alnaimi, F. B. I., & Nasif, M. S. (2020). Intelligent risk-based maintenance approach for steam boilers: Real case. Pertanika Journal of Science and Technology, 28(S1), 69-81.

• Gupta, M., & Kumar, R. (2015a). Optimization of a turbine used in coal fired thermal power plants based on inlet steam temperature using thermoeconomics. International Journal of Recent advances in Mechanical Engineering, 4(4), 59-66. https://doi.org/10.14810/ijmech.2015.4405

• Gupta, M., & Kumar, R. (2015b). Thermoeconomic optimization of a boiler used in a coal fired thermal power plant based on hot air temperature. International Journal of Recent advances in Mechanical Engineering, 4(2), 39-44. https://doi.org/10.14810/ijmech.2015.4205

• Li, K., & Vani, G. (2014). DCS technology-based design of electrical control system for thermal power plant. The Open Electrical & Electronic Engineering Journal, 8(1), 700-704. https://doi.org/10.2174/1874129001408010700

• Mohammed, M. K., Al Doori, W. H., Jassim, A. H., Ibrahim, T. K., & Al-Sammarraie, A. T. (2020). Energy and exergy analysis of the steam power plant based on effect the numbers of feed water heater. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 56(2), 211-222.

• Neshumayev, D., Rummel, L., Konist, A., Ots, A., & Parve, T. (2018). Power plant fuel consumption rate during load cycling. Applied Energy, 224(C), 124-135. https://doi.org/10.1016/j.apenergy.2018.04.063

• Nistah, N. N. M., Motalebi, F., Samyudia, Y., & Alnaimi, F. B. I. (2014). Intelligent monitoring interfaces for coal fired power plant boiler trips: A review. Pertanika Journal of Science and Technology, 22(2), 593-601.

• Opriş, I., Cenuşă, V. E., Norişor, M., Darie, G., Alexe, F. N., & Costinaş, S. (2020). Parametric optimization of the thermodynamic cycle design for supercritical steam power plants. Energy Conversion and Management, 208, Article 112587. https://doi.org/10.1016/j.enconman.2020.112587

• Pachaiyappan, J., & Prakash, D. (2015). Improving the boiler efficiency by optimizing the combustion air. Applied Mechanics and Materials, 787, 238-242. https://doi.org/10.4028/www.scientific.net/AMM.787.238

• Srinivas, G. T., Kumar, D. R., Mohan, P. V. V. M., & Rao, B. N. (2017). Efficiency of a coal fired boiler in a typical thermal power plant. American Journal of Mechanical and Industrial Engineering, 2(1), 32-36. https://doi.org/10.11648/j.ajmie.20170201.15

• Sundaravinayaka, U., & Jayapaul T. (2017). Optimization of boiler operation in thermal power station. International Journal of Latest Engineering Research and Applications, 2(3), 64-68.

• Tian, Z., Xu, L., Yuan, J., Zhang, X., & Wang, J. (2017). Online performance monitoring platform based on the whole process models of subcritical coal-fired power plants. Applied Thermal Engineering, 124, 1368-1381. https://doi.org/10.1016/j.applthermaleng.2017.06.112

• Umrao, O. P., Kumar, A., & Saini, V. K. (2017). Performance of coal based thermal power plant at full load and part loads. Global Journal of Technology and Optimisation, 8(1), 1-15. https://doi.org/10.4172/2229-8711.1000205

• Wang, Y., Cao, L., Hu, P., Li, B., & Li, Y. (2019). Model establishment and performance evaluation of a modified regenerative system for a 660 MW supercritical unit running at the IPT setting mode. Energy, 179, 890-915. https://doi.org/10.1016/j.energy.2019.05.026

• Wijaya, A. A., & Widodo, B. U. K. (2018). The effect of feedwater heaters operation schemes to a 200 MW steam power plant heat rate using cycle-tempo software. IPTEK Journal of Engineering, 4(3), 33-37. https://doi.org/10.12962/joe.v4i3.4995

• Zhang, Y., Wang, J., Yang, S., & Gao, W. (2018). An all-condition simulation model of the steam turbine system for a 600 MW generation unit. Journal of Energy Institute, 91(2), 279-88. https://doi.org/10.1016/j.joei.2016.11.007