Thermodynamic Cycle Concepts for High-Efficiency Power Plants. Part B: Prosumer and Distributed Power Industry

Kosowski, Krzysztof; Tucki, Karol; Piwowarski, Marian; Stępień, Robert; Orynycz, Olga; Włodarski, Wojciech

doi:10.3390/su11092647

Cited by 20 publications

(14 citation statements)

References 35 publications

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“…Experimentally confirmed intensification of heat transfer on the air side makes the proposed minijets heat exchanger application more attractive, for the waste heat utilization systems from gas sources (especially low-temperature carriers). In addition, the compactness of the design makes this heat exchanger an ideal proposal for micro-CHP (for example as the regenerator for high-efficiency air turbine cycles [34,35]).…”

Section: Discussionmentioning

confidence: 99%

Thermal-Hydraulic Studies on the Shell-and-Tube Heat Exchanger with Minijets

2019

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In this paper a patented design of a heat exchanger with minijets, with a cylindrical construction is presented. It is followed by the results of its systematic experimental investigations in the single-phase convection heat transfer mode. Based on these results, validation of selected correlations (coming from the literature) describing the Nusselt number was carried out. An assessment of the heat exchange intensification level in the described heat exchanger was done through the comparison with a shell-and-tube exchanger of a classical design. The thermal-hydraulic characteristics of both units were the subjects of comparison. They were constructed for the identical thermal conditions, i.e., volumetric flow rates of the working media and the media temperatures at the inlets to the heat exchanger. The experimental studies of both heat exchangers were conducted on the same test facility. An increase in the heat transfer coefficients values for the minijets heat exchanger was observed in comparison with the reference one, whereas the generated minijets caused greater hydraulic resistance. Experimentally confirmed intensification of heat transfer on the air side, makes the proposed minijets heat exchanger application more attractive, for the waste heat utilization systems from gas sources.

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Section: Discussionmentioning

confidence: 99%

Thermal-Hydraulic Studies on the Shell-and-Tube Heat Exchanger with Minijets

2019

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“…The electricity used is known as final energy [73,74]. A particular amount of primary energy, i.e., energy contained in sources or energy carriers (e.g., in fuels combusted in a power plant), is needed for its production and delivery [75,76].…”

Section: Primary Energy Indicatormentioning

confidence: 99%

The Development of Electromobility in Poland and EU States as a Tool for Management of CO2 Emissions

et al. 2019

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The article analyzes the dynamics of the development of the electromobility sector in Poland in the context of the European Union and due to the economic situation and development of the electromobility sector in the contexts of Switzerland and Norway. On the basis of obtained data, a forecast was made which foresees the most likely outlook of the electric car market in the coming years. The forecast was made using the creeping trend method, and extended up to 2030. As part of the analysis of the effect of the impact of electromobility, an original method was proposed for calculating the primary energy factor (PEF) primary energy ratio in the European Union and in its individual countries, which illustrates the conversion efficiency of primary energy into electricity and the overall efficiency of the power system. The original method was also verified, referring to the methods proposed by the Fraunhofer-Institut. On the basis of all previous actions and analyses, an assessment was made of the impact of the development of the electromobility sector on air quality in the countries studied. Carbon dioxide tank-to-wheels emission reductions which result from the conversion of the car fleet from conventional vehicles to electric motors were then calculated. In addition to reducing carbon dioxide emissions, other pollutant emissions were also calculated, such as carbon monoxide (CO), nitrogen oxides (NOx) and particulate matter (PM). The increase in the demand for electricity resulting from the needs of electric vehicles was also estimated. On this basis, and also on the basis of previously calculated primary energy coefficients, the emission reduction values have been adjusted for additional emissions resulting from the generation of electricity in power plants.

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“…The needs for replacement of fossil fuels, and for mitigation of carbon dioxide emissions already became the challenge [4,5] that affects the World's economy [6]. New technologies in power engineering [7][8][9], promotion of electro-mobility, a departure from fossil fuels, and concern for sustainable development and energy security together with assuring the environmental protection are the factors that the fuel and energy industry must react to these changes and prepare for them [10][11][12]. These issues, however, seem to bring expected results in the rather distant future, which means they belong to strategic considerations.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Fundamentals for Fuel Production Management

et al. 2019

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An increase of needs for replacement of fossil fuels, and for mitigation of Carbon Dioxide emissions generated from fossil fuels inspires the search for new fuels based on renewable biological resources. It would be convenient if the biological component of the fuel required as little as possible conversion operations in the production. The obvious response is an attempt to use unconverted, neat plant oils as a fuel for Diesel engines. The present paper is devoted to the experimental studies of the combustion process of neat rapeseed oil, and its mixtures with gasoline and ethanol as additional components of the mixtures. The investigation of combustion was carried out in a fixed volume combustion chamber equipped with a Common Rail injection system. It is shown that the instant of ignition, as well as time-dependence of heat emanation, are strongly dependent upon mixture composition. The results enable the design of mixture compositions that could serve as commercial fuel for Diesel engines. Such fuels are expected to fulfill the requirements for the sustainability of road transport.

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Thermodynamic Cycle Concepts for High-Efficiency Power Plants. Part B: Prosumer and Distributed Power Industry

Cited by 20 publications

References 35 publications

Thermal-Hydraulic Studies on the Shell-and-Tube Heat Exchanger with Minijets

Thermal-Hydraulic Studies on the Shell-and-Tube Heat Exchanger with Minijets

The Development of Electromobility in Poland and EU States as a Tool for Management of CO2 Emissions

Thermodynamic Fundamentals for Fuel Production Management

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