First and second law analysis of diesel engine powered cogeneration systems

Abuşoğlu, Ayşegül; Kanoğlu, Mehmet

doi:10.1016/j.enconman.2008.02.012

Cited by 77 publications

(47 citation statements)

References 8 publications

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“…Cogeneration systems utilize the waste heat produced during electricity generation and apply it for heating purposes. Since cogeneration, or combined heat and power (CHP), systems produce both thermal energy (generally in the form of steam or hot water) and electricity, the first law efficiency can be increased from around 35% to 55% in conventional power plants to over 90% in CHP systems [1][2][3]. Reciprocating CHP units are generally applicable in low and medium power cogeneration units.…”

Section: Introductionmentioning

confidence: 99%

“…The sizes of reciprocating CHP units depend on fuel type and use. These can range from 50 kW to 10 MW for natural gas, from 50 kW to 50 MW for diesel, and from 2.5 MW to 50 MW for heavy fuel oil [1][2][3]. In compression ignition (IC) engines, four methods to utilize waste heat exist: exhaust gas, engine jacket cooling water, lube oil cooling water, and turbocharger cooling water.…”

Section: Introductionmentioning

confidence: 99%

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Exergy, Economic and Environmental Analysis for Simple and Combined Heat and Power IC Engines

et al. 2015

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This study reports the results of exergy, economic and environmental analyses of simple and combined heat and power internal combustion engines. Values of entropy production, second law efficiency are calculated, and an objective function, including initial, operation, maintenance and fuel costs, as well as the external costs of environmental pollutants, such as CO2, CO and NOx, are presented for the flue gas of the internal combustion engine. The results show that entropy generation in the combined heat and power mode is 30% lower than that in the simple internal combustion engine. Also, by excessively increasing the air ratio, the system entropy generation decreases in both cases of simple and combined heat and power IC engines. The greatest portion of entropy generation is related to the combined heat and power internal combustion engine. The gas heat exchanger generates more entropy than the jacket heat exchanger. Lower values of electricity cost and external costs of air pollution are provided by higher values of molar air to fuel ratio. The environmental aspects depend on location of the system and time of engine operation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exergy, Economic and Environmental Analysis for Simple and Combined Heat and Power IC Engines

et al. 2015

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“…Multicriteria evaluations according to weighting methodologies have been proposed recently [23,24]. Then, First and Second Law analyses of gas engines, fuel cells or hybrid solar systems [1,[5][6][7]11,14] have shown that the energy-saving effect increases with the system scale because the heat to power ratio of the system decreases [1], or that both the main energy and exergy loss take place at the parabolic trough collector [7], and that the polymer exchange membrane fuel cell (PEMFC)-based CHP system, operating at atmospheric pressure and low temperature, is the most efficient system when compared to a solid oxide fuel cell (SOFC) one [14].…”

Section: Introductionmentioning

confidence: 99%

“…When looking into internal combustion engine (ICE) poly-generation systems [12], the analysis provides high primary energy savings and low emissions suggesting that for such systems optimization should be done from an economic and environmental point of view. Finally, exergoeconomic analysis of CHP applications (engines, gas turbine) [6,8,9] or evaluation of CO 2 capture and management studies [12,19] complete the overview and come to meet users' main concerns-available energy and CO 2 emission price.…”

Section: Introductionmentioning

confidence: 99%

“…In the recent past, due to environmental impact considerations and energy efficient use purposes, a renewal and development of combined heat and power systems was increasing from large to small scale CHP systems, even μCHP, and for industrial or building applications [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. New configurations of CHP systems were studied and among them photovoltaic/thermal (PV/T) configurations [15][16][17] or fuel cell CHP systems [2,4,14] are close to implementation in the near future.…”

Section: Introductionmentioning

confidence: 99%

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Energy and Exergy Analysis and Optimization of Combined Heat and Power Systems. Comparison of Various Systems

Feidt

Costea

2012

Energies

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Abstract:The paper presents a comparison of various CHP system configurations, such as Vapour Turbine, Gas Turbine, Internal Combustion Engine, External Combustion Engine (Stirling, Ericsson), when different thermodynamic criteria are considered, namely the first law efficiency and exergy efficiency. Thermodynamic optimization of these systems is performed intending to maximize the exergy, when various practical related constraints (imposed mechanical useful energy, imposed heat demand, imposed heat to power ratio) or main physical limitations (limited heat availability, maximum system temperature allowed, thermo-mechanical constraints) are taken into account. A sensitivity analysis to model parameters is given. The results have shown that the various added constraints were useful for the design allowing to precise the influence of the model main parameters on the system design. Future perspective of the work and recommendations are stated.

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Exergy analysis of a diesel engine fuelled with Aegle marmelos de‐oiled seed cake pyrolysis oil opus

Paramasivam

2020

Env Prog and Sustain Energy

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Biofuel is a renewable fuel and can be used as a replacement for diesel. Pyrolysis oil can be derived from non‐edible de‐oiled seed cakes. This investigation focuses on the exergy investigation of a compression ignition (CI) engine to maximize the work exergy (availability) and minimize the destroyed exergy, powered by Aegle marmelos (AM) de‐oiled seed cake bio‐oil blends. A dual blend of diesel and AM pyrolysis oil was taken in ratios, F0 = 100 + 0, F5 = 95 + 5, F10 = 90 + 10, F15 = 85 + 15, and F20 = 80 + 20 and were tested on a constant speed CI engine at standard compression ratio. The investigational analysis exhibited that a high amount of oxygen content in AM pyrolysis oil blends increased the brake thermal efficiency and decreased the brake‐specific fuel consumption compared with diesel (F0). The owing exergy efficiency was obtained from the F20 blend (57.21%) at 100% load (W). Based on the investigation, considering availability and performance behavior of F5, F10, F15, and F20 blends were suggested as suitable biofuel alternatives to diesel.

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First and second law analysis of diesel engine powered cogeneration systems

Cited by 77 publications

References 8 publications

Exergy, Economic and Environmental Analysis for Simple and Combined Heat and Power IC Engines

Exergy, Economic and Environmental Analysis for Simple and Combined Heat and Power IC Engines

Energy and Exergy Analysis and Optimization of Combined Heat and Power Systems. Comparison of Various Systems

Exergy analysis of a diesel engine fuelled with Aegle marmelos de‐oiled seed cake pyrolysis oil opus

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