عنوان انگلیسی مقاله:
Micro-combined heat and power using dual fuel engine and biogas from discontinuous anaerobic digestion
ترجمه فارسی عنوان مقاله:
گرما و قدرت میکرو ترکیبی با استفاده از موتور سوخت دوگانه و بیوگاز از هضم بی هوازی ناپیوسته
Sciencedirect - Elsevier - Energy Conversion and Management, 205 (2020) 112407. doi:10.1016/j.enconman.2019.112407
Naim Akkouchea,b,⁎, Khaled Loubarb, François Nepveua, Mohamed El Amine Kadib, Mohand Tazeroutb
The modeling of the Micro-CHP unit operating in dual-fuel mode is performed based on experimental results
carried out at the laboratory scale. The engine tests were performed on an AVL engine, with a maximum power
of 3.5 kW, using conventional diesel as pilot fuel and synthetic biogas as primary fuel. The biogas flow rate is
evaluated using the experimental results from the literature, based on the anaerobic digestion in batch reactor of
a mixture of 26% of Oat Straw and 74% of Cow Manure, diluted to contain only 4% of volatile solid.
The engine operation was modeled using the Artificial Neuron Network (ANN) method. Experimental engine
tests were used as a database for training and validation phases of ANN models. Three different ANN models are
developed to model respectively the pilot fuel flow rate, the airflow rate and the exhaust gas temperature. Engine
power output, biogas flow rate and biogas methane content were used as the same input layer.
Given that the evolution of the biogas flow evolves along the entire digestion duration (50 days), the simulation
work is performed by varying the number of digesters to be used in parallel mode. It is obtained that
the optimal operation condition, minimizing the number of digesters and using less than 10% of the energy from
diesel fuel, is to use 5 digesters and run the engine under load of 70%. It is concluded that a micro-CHP unit of 1
kWe, requires a dual fuel generator with a nominal power of 1 kWe, five digesters and a daily availability of
effluents of 171 kg/day, consisting of 45 kg/day of oat straw and 126 kg/day of cow manure. It can also produce
up to 2.45 kW of thermal power from the exhaust.
Keywords: Micro CHP | Anaerobic digestion | Dual fuel engine | Artificial Neural Network | Cogeneration