Experimental and numerical analysis of a micro scale cogeneration system with 100 kW straw-fired boiler

• Autorzy: Sornek Krzysztof , Figaj Rafał Damian , Żołądek Maciej , Filipowicz Mariusz
• Języki publikacji: EN

Abstrakty

EN

Straw-fired batch boilers, due to their simple structure and low operating costs, are an interesting option for heating systems dedicated to use in houses, farms, schools, industrial facilities and other buildings. Commercially available solutions include typical water boilers and air heaters with a thermal oil jacket. The high temperature of thermal oil (180-200_C) mean straw-fired devices can be used as a source of heat for micro scale cogeneration and trigeneration systems. The first part of this paper shows an experimental analysis of a micro scale cogeneration system based on modified Rankine Cycle operation. A 100 kWth straw-fired batch boiler with thermal oil jacket was used as a high temperature heat source. Thermal oil, heated in the boiler, was transferred respectively to the evaporator, superheater and oil/water emergency heat exchanger. The steam generated was conditioned and used to power a 20 hp steam engine. Cooling water, heated in the condenser, was pumped to a 4 m3 water tank connected to two air coolers. Control of the system operation was realized using a dedicated automation system based on the PLC controller. In the second part of this study, a micro scale cogeneration system was developed and modelled in TRNSYS software on the basis of the experimental installation. The dynamic operation conditions in terms of temperatures and powers were analyzed for the main components of the system (boiler, evaporator steam engine, condenser). Moreover, some modifications in the system construction were proposed to improve its performance. The results of the experimental tests were used to identify the main aspects of the considered system—temperature, pressure and power levels in oil, steam and water circuits and operating parameters of the steam engine. Dynamic simulations performed in TRNSYS pointed to the nominal operation scenario for the tested system and showed the great potential for further improvements in the system construction.

Słowa kluczowe

EN

micro cogeneration; renewable energy sources; trigeneration; biomass; straw-fired boiler; TRNSYS; dynamic simulation

PL

mikrokogeneracja; odnawialne źródła energii; trigeneracja; biomasa; piec na słomę; TRNSYS; symulacja dynamiczna

• Wydawca: Institute of Heat Engineering, Warsaw University of Technology
• Czasopismo: Journal of Power Technologies
• Rocznik: 2019
• Tom: Vol. 99, nr 2
• Strony: 92--97
• Opis fizyczny: Bibliogr. 12 poz., rys., wykr.

Twórcy

autor

Sornek Krzysztof

• AGH University of Science and Technology, Mickiewicza 30 av, Krakow 30-059, Poland

autor

Figaj Rafał Damian

• AGH University of Science and Technology, Mickiewicza 30 av, Krakow 30-059, Poland

autor

Żołądek Maciej

• AGH University of Science and Technology, Mickiewicza 30 av, Krakow 30-059, Poland

autor

Filipowicz Mariusz

• AGH University of Science and Technology, Mickiewicza 30 av, Krakow 30-059, Poland

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).