Improving flexibility characteristics of 200 MW unit

• Autorzy: Taler J. , Trojan M. , Taler D. , Dzierwa P. , Kaczmarski K.

Identyfikatory

DOI

10.1515/aoter-2017-0005

• Języki publikacji: EN

Abstrakty

EN

Calculations were performed of the thermal system of a power plant with installed water pressure tanks. The maximum rise in the block electric power resulting from the shut-off of low-pressure regenerative heaters is determined. At that time, the boiler is fed with hot water from water pressure tanks acting as heat accumulators. Accumulation of hot water in water tanks is also proposed in the periods of the power unit small load. In order to lower the plant electric power in the off-peak night hours, water heated in low-pressure regenerative heaters and feed water tank to the nominal temperature is directed to water pressure tanks. The water accumulated during the night is used to feed the boiler during the period of peak demand for electricity. Drops in the power block electric power were determined for different capacities of the tanks and periods when they are charged. A financial and economic profitability analysis (of costs and benefits) is made of the use of tanks for a 200 MW power unit. Operating in the automatic system of frequency and power control, the tanks may also be used to ensure a sudden increase in the electric power of the unit. The results of the performed calculations and analyses indicate that installation of water pressure tanks is well justified. The investment is profitable. Water pressure tanks may not only be used to reduce the power unit power during the off-peak night hours and raise it in the periods of peak demand, but also to increase the power capacity fast at any time. They may also be used to fill the boiler evaporator with hot water during the power unit start-up from the cold state.

Słowa kluczowe

EN

thermal power unit; flexibility increasing; steam boiler; rapid start-up

PL

elektrownia cieplna; elastyczność; kocioł parowy; szybkie uruchamianie

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2017
• Tom: Vol. 38, no. 1
• Strony: 75--90
• Opis fizyczny: BIbliogr. 5 poz., rys., tab., wz.

Twórcy

autor

Taler J.

• Institute of Thermal Power Engineering, Cracow University of Technology, Jana Pawła II 37, 31-864 Kraków, Poland

autor

Trojan M.

• Institute of Thermal Power Engineering, Cracow University of Technology, Jana Pawła II 37, 31-864 Kraków, Poland

autor

Taler D.

• Institute of Thermal Engineering and Air Protection, Faculty of Environmental Engineering, Warszawska 24, 31-155 Kraków, Poland

autor

Dzierwa P.

• Institute of Thermal Power Engineering, Cracow University of Technology, Jana Pawła II 37, 31-864 Kraków, Poland

autor

Kaczmarski K.

• Institute of Thermal Power Engineering, Cracow University of Technology, Jana Pawła II 37, 31-864 Kraków, Poland

Bibliografia

• [1] Taler J., Dzierwa P., Taler D., Harchut P.:Optimization of the boiler start-up taking into account thermal stresses. Energy 92(2015), 1, 160–170,DOI:10.1016/j.energy.2015.03.095.
• [2] Dzierwa P., Taler D., Taler J., Trojan M.: Optimum heating of thick wall pressure components of steam boilers. In: Pro. ASME 2014 Power Conference POWER2014, July 28-31, 2014, Baltimore, Maryland, 1–9.
• [3] Dzierwa P., Taler J.: Optimum heating of pressure vessels with hole. J. Pressure Vessels Technol. 137(2015), ASME, 011202-1-8/.
• [4] Polish Standard PN-EN 12952-3: Water-tube boilers and auxiliary installations. Part 3: Design and calculation for pressure parts. PKN, Warsaw 2004.
• [5] Taler J., Trojan M., Taler D., Dzierwa P., Kaczmarski K., Liszka M.: Improvement of power unit flexibility using pressure accumulation of hot water. Thermal turbines. Theory, Constractions and Operations. Wydawnictwo Politechniki Śląskiej, Gliwice 2016, 167–179.