HEAT RATE GAP ANALYSIS ON STEAM POWER PLANT CAPACITY 220 MW

• Main Author: Adhi Kuncoro, Mahendra
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/37831
• Institution: Institut Teknologi Bandung

The Pangkalan Susu Power Plant is one of the biggest power plants that has a big influence on the electricity system in North Sumatra and has been operating for more than four years. Therefore, unit reliability is expected to maintain electricity supply, reliability can be seen from the parameters of heat rate changes. To see the development of unit efficiency conditions, based on the Electric Power Research Institute (EPRI) manual, factors can be mapped from the parameters contributing to the deviation of the value of the design heat rate and the actual heat rate of the unit operating at the same load. In this thesis to validate the results of the heat balance calculation used the cycle tempo software with a load variation of 50%,75%,100%, and operating parameters according to the design of the steam power plant and simulation is also carried out using daily operation data with a load of 110 MW. From the analysis of the deviation between actual heat rate and the design heat rate at 110 MW load it is referred to as the "heat rate gap" which shows the increase value of the turbine heat rate 46 kcal/kWh, where the biggest contributor to the increase is from hot reheat steam temperature of 8.15 kcal/kWh. From this analysis also obtained a decrease in boiler efficiency 0.9 % of the design conditions. To repair the increase in heat rate, there are two ways, the first method of controllable operators, which is by resetting the bypass damper, controlling excess water, and regulating the flow of superheater spray.. And the second method is maintenance controllable by recalibrating the temperature control setpoint, repairing the control valve on the superheater spray, cleaning the boiler wall and repairing damaged auxiliary air dampers.