Cogeneration units simulation models library

Skolnik, Petr; Hubka, Lukáš; Modrlak, Osvald; Nahlovsky, Tomas

doi:10.1109/pc.2013.6581418

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…In this work, the focus is concentrated on The best overall efficiency and economics of CHP systems come from a steady thermal load. However, the fundamental problem is that the annual production of electricity is determined by the amount of usable heat that is generated throughout the year [10]. If no hot water is needed, the amount of heat recovered from the engine is reduced, and the total CHP system efficiency drops accordingly.…”

Section: Energy Supply Systemmentioning

confidence: 99%

Small Cogeneration Unit with Heat and Electricity Storage

2021

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A micro cogeneration unit based on a three-cylinder internal combustion engine, Skoda MPI 1.0 L compressed natural gas (CNG), with an output of 25 kW at 3000 RPM is proposed in this paper. It is a relatively simple engine, which is already adopted by the manufacturer to operate on CNG. The engine life and design correspond to the original purpose of use in the vehicle. A detailed dynamic model was created in the GT-SUITE environment and implemented into an energy balance model that includes its internal combustion engine, heat exchangers, generator, battery storage, and water storage tank. The 1D internal combustion engine model provides us with information on engine start-up time, actual effective power, friction power, and the amount of heat going to the cooling system and exhaust pipe. The catalytic converter was removed from the exhaust pipe, and the engine was always operating at full load; thus, engine power control is not considered. An energy storage system for an island operation of the entire power unit for a large, detached house was designed to withstand accumulated energy for a few days in the case of a breakout. To reach a low initial system cost, the possible implementation of worn-out battery packs toward emission reduction in terms of the second life of the battery is proposed. The energy and emission balance are carried out, and the service life of the engine is also discussed.

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Section: Energy Supply Systemmentioning

confidence: 99%

Small Cogeneration Unit with Heat and Electricity Storage

2021

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“…In another paper is presented the laboratory cogeneration thermal power plant based on the air-cooled internal combustion engine [3]. Mathematical modeling and simulation studies of cogeneration units which are a diesel engine, heat exchanger, synchronous generator and gas turbine are examined in detail [4]. In recent years, micro-cogeneration systems have also begun to operate using renewable resources.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of grid-connected micro-cogeneration system based on the internal combustion engine

Yavuzdeger

Ekinci

2019

European Mechanical Science

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The effective usage of energy is an important factor in our country and world. The cogeneration system is one of the methods for the effective usage of energy. The cogeneration system in recent technology is about 30% more effective in reducing fuel consumption and carbon footprint compared to the power and heat production efficiency for traditional systems feeding by fossil fuels. Over the last decade, extensive research has been undertaken on the optimization and use of low-capacity internal combustion gas engines in micro-combined heat-power systems. Problems such as the technology used in the micro-cogeneration system, fuel type and performance, efficiency of the system, utilization of different fuel types, noise, emission, maintenance problems have not been solved yet. In recent years, intensive studies have been carried out on the fuel cells that are being used for the cogeneration system, but the cost and the low life span of fuel cell cogeneration systems are preventing it from becoming widespread. With the proposed system, it will be easily applied in small scale places such as houses, offices, campuses, hospitals, shopping malls, and electricity and heat production efficiency will be used effectively for low CO 2 emission. In this paper, the integration of an internal combustion engine which has 9.8kW and 1500 revolutions per minute (rpm) properties, a synchronous generator and grid connection have been successfully achieved. The simulated engine specifications are that three-cylinder and 4-stroke otto cycle. Also, injection type and fuel oil specifications of this engine are carburization and natural gas respectively. The performance results of the proposed system have been obtained by using MATLAB/Simulink.

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Computational Intelligence techniques for maximum energy efficiency of an internal combustion engine and a steam turbine of a cogeneration process

Fernández

Campo

Echanobe

et al. 2014

Int J Energy Environ Eng

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This paper discusses the development of a model of a real cogeneration plant based on Computational Intelligence (CI) algorithms. In particular, two CI strategies are used: one based on artificial neural network and the other one based on a neuro-fuzzy system. Both systems are trained with a data collection from the cogeneration plant. Data mining techniques are applied to remove erroneous and redundant data, and also to obtain information about the variables and its behaviour. This task allows to select only the relevant information and is also a way to decrease the complexity of the model. In this first approach on the work, two separate subsystems of the cogeneration process are considered: an engine and a steam turbine. The obtained models are used to analyze the role of each involved variable and to derive a set of recommendations (i.e., changes in some of the input variables) to optimize the performance of the system. The recommendations applied to the models improve the behaviour of the plant providing higher energy production with a lower cost.

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Cogeneration units simulation models library

Cited by 5 publications

References 4 publications

Small Cogeneration Unit with Heat and Electricity Storage

Small Cogeneration Unit with Heat and Electricity Storage

Performance analysis of grid-connected micro-cogeneration system based on the internal combustion engine

Computational Intelligence techniques for maximum energy efficiency of an internal combustion engine and a steam turbine of a cogeneration process

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