De–aeration and Associate Systems Consideration for the Engine Cooling System Design

1982 ◽  
Author(s):  
Jagdish K. Patel
Author(s):  
Jisjoe T. Jose ◽  
Julian F. Dunne ◽  
Jean-Pierre Pirault ◽  
Christopher A. Long

IC engine spray evaporative cooling system design is discussed starting with a review of existing evaporative cooling systems that automotive applications are required to address. A component-level system design is proposed culminating in a simulation model of a PID strategy used to control transient gasside metal temperatures with varying engine load. The model combines a spray evaporation correlation model with 1D finite-difference equations to model the transient heat transfer through a 7 mm thick metal slab which represents the wall of a cylinderhead. Based on the simulation results, the particular changes required of existing engine cooling jacket designs are discussed.


Author(s):  
Roberto Cipollone ◽  
Carlo Villante

Cooling system design has a crucial role in defining engine performance, operational limits and thermal comfort. Many further improvements with respect to the actual situation can be obtained through a more accurate control of an-board thermal needs. To this new interest the definition of new technical specifications must follow. The technical literature, however, seems not fully satisfying this need, not focusing on the influence of these technical specifications on system design, reliability and costs. In this paper the authors present a contribution in this direction, showing the capabilities of an active intelligent management of the engine cooling system. This can be obtained through different control strategies, strongly diversified for their cost-performance ratio. The potentiality of a model-based controller has been also investigated and compared with the correspondent closed-loop controller.


2021 ◽  
Author(s):  
Fabricio Thomaz ◽  
Glauber Assungao Resende de Paula ◽  
Augusto Cesar Teixeira Malaquias ◽  
Jose Guilherme Coelho Baeta

2020 ◽  
Vol 67 (1) ◽  
pp. 42-47
Author(s):  
Anatoliy I. Sopov ◽  
Aleksandr V. Vinogradov

In power transformers, energy losses in the form of heat are about 2 percent of their rated power, and in transformers of large power centers reach hundreds of kilowatts. Heat is dissipated into the environment and heats the street air. Therefore, there is a need to consume this thermal energy as a source of heat supply to nearby facilities. (Research purpose) To develop methods and means of using excess heat of power transformers with improvement of their cooling system design. (Materials and methods) The authors applied following methods: analysis, synthesis, comparison, monographic, mathematical and others. They analyzed various methods for consuming excess heat from power transformers. They identified suitable heat supply sources among power transformers and potential heat consumers. The authors studied the reasons for the formation of excess heat in power transformers and found ways to conserve this heat to increase the efficiency of its selection. (Results and discussion) The authors developed an improved power transformer cooling system design to combine the functions of voltage transformation and electric heating. They conducted experiments to verify the effectiveness of decisions made. A feasibility study was carried out on the implementation of the developed system using the example of the TMG-1000/10/0.4 power transformer. (Conclusions) The authors got a new way to use the excess heat of power transformers to heat the AIC facilities. It was determined that the improved design of the power transformer and its cooling system using the developed solutions made it possible to maximize the amount of heat taken off without quality loss of voltage transformation.


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