The Potential of Exhaust Waste Heat Use in a Turbocharged Diesel Engine for Charge Air Cooling

Danilecki, K.; Eliasz, Jacek

doi:10.4271/2020-01-2089

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…They found a wide application in stationary and transport energy plants. Fuel efficiency of gas turbines [31,32], diesel engines, and gas engines [33,34] decrease with increasing air temperature at the inlet [35,36].…”

Section: Literature Reviewmentioning

confidence: 99%

Research of hydrodynamic processes in the flow part of a low-flow thermopressor

Konovalov,

Kobalava,

Radchenko

et al. 2024

Journal of Energy Systems

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This research explores the hydrodynamic processes within the flow section of a low-flow thermopressor as a jet-type heat exchanger that utilizes the instantaneous evaporation of highly dispersed liquid in accelerated superheated gas flow resulting in reducing gas temperature with minimum resistance losses in contrast to conventional surface heat exchanger. The efficiency of thermopressor, as a contact heat exchanger, is highly dependent on the design of the flow section and the water injection nozzle. Geometric characteristics perform a crucial role in shaping gas-dynamic processes along the length of the thermopressor's flow section, influenced by resistance losses and local resistance in the tapering and expanding channel segments. Therefore, the optimum thermopressor design has to ensure minimize pressure losses. Using Computational Fluid Dynamics (CFD), the prototype thermopressor models were simulated and the results were compared with experimental data. The empirical equations for local resistance coefficients of thermopressor diffuser and confuser were received to evaluate the impact of various design parameters. The obtained local resistance coefficients for the confuser ranged from 0.02 to 0.08 and for the diffuser – from 0.08 to 0.32. The practical recommendations on geometric and operating parameters and characteristics for enhancing the efficiency of hydrodynamic processes in thermopressor flow part were given.

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Section: Literature Reviewmentioning

confidence: 99%

Research of hydrodynamic processes in the flow part of a low-flow thermopressor

Konovalov,

Kobalava,

Radchenko

et al. 2024

Journal of Energy Systems

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“…2. Turning to heat recovery boilers with twopressure circuits (additionally increases the capacity of the utilization turbine generator by 15-30%) [10,11].…”

Section: Literature Reviewmentioning

confidence: 99%

Analysing the efficiency of thermopressor application in the charge air cooling system of combustion engine

Konovalov¹,

Radchenko²,

Kobalava³

et al. 2021

E3S Web Conf.

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As the analysis of the research results has shown, the use of a thermopressor makes it possible to increase the fuel and energy efficiency of a ship power plant in a wide range of the operation parameters. It can be achieved by cooling the charge air before the engine inlet receiver and by reducing the compression work of the turbocharger. A scheme with the thermopressor application in the cooling system of a low-speed main engine and in the system for utilizing the exhaust gases heat in a heat recovery boiler of one and two pressures was proposed. The use of thermopressors led to a decrease in the compressor power consumption, and therefore in the turbine required power. Therefore, it was appropriate to pass (bypass) the excess amount of gas past the turbine. Accordingly, the thermal potential of exhaust gases was increased. As a result, the temperature of gases at the inlet to the heat recovery boiler was increased by 10-15 °C, and gases heat was increased by 10-15% respectively. The obtained additional steam is advisable to use for driving the utilization turbine generator, thereby reducing the load on the ship's power plant, with a corresponding decrease in fuel consumption of diesel generators by 2-4%.

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