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The influence of intensity of charge air intercooling on diesel engine gas

Hlavńa V., Kovalčik A., Krakovsky J., Labuda R.

Journal of KONES

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2011

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Vol. 18, No. 2

177-184

EN

The intercooling of charge air is one way of possible arrangements done while preparing fuel for diesel engines with the objective of lowering the environmental load. Such intercooling has other positive effects, e.g. the output increase, decrease in the maximal temperature of engine working cycle, decrease in thermal load of functional parts in the combustion space. Coolers of different constructions and versions are used for the charge air intercooling. As we have already presented in conferences and professional journals, we have been engaged in basic research into the non-conventional energetic system with the cooling combustion engine (the engine cooling circle is the ejector of absorption cooling). The obtained cold can be used for different purposes, e.g. for air conditioning of the maintenance room, cooling of goods storage space in trucks and also for more intensive intercooling of the charge air. Simultaneously with the mentioned topics we have been partially dealing with the influence of more intensive intercooling on the engine ecological parameters. We have presented some results of mathematical modelling connected with the mentioned topic. The paper is a continuation of previous publications and focuses on results of the experiment observing a two-stage charge air intercooling to lower temperatures. The air-to-air cooler was used as the first intercooling stage while the second stage was performed by means of the water-air intercooler.

2

Optimization of a nonconventional engine evaporator

Kovalčik A., Toporcer E.

Journal of KONES

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2010

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Vol. 17, No. 2

217-223

EN

The papers deal with the optimization of the evaporator of a nonconventional combustion engine. Lithium bromide liquid (LiBr - an alternative cooling medium) flows in a cooling circuit of a nonconventional energetic unit. The solved energetic system is defined in the area of trigeneration systems. The mentioned system is a source of electric energy, cold and heat too. The space geometrical model corresponding to the geometry of the original evaporator is created in the CAD (Computer Aided Design) software CATIA. Only one half of the evaporator is created because of the decrease in the demand on the computational means. This CAD model is then imported into the preprocessor Gambit. The imported model is repaired and a suitable mesh is then created. The last step is the definition of the types of boundary conditions. The completed computational mesh is then exported from Gambit and imported into the CFD (Computational Fluid Dynamics) software Fluent. Fluent is used for the numerical simulation of the cooling medium flow in an evaporator. The simulation shows the filling of the evaporator cone, the time when the cooling medium starts to pour through the edge of the evaporator cone, the filling of the evaporator ring and finally also the fact that the off-take is able to take away the needed amount of cooling liquid from the evaporator.

3

Osoblivosti vikoristaniâ metalevih stekol v termometríï

Stadnik B., Skoropad P., Guk O., Kovalčik A.

Zeszyty Naukowe Politechniki Rzeszowskiej. Elektrotechnika

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2005

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z. 28 [223]

171--176

EN

The features of application of glasses are analyzed in thermometry and grounded expedience of setting of norms of parameters of technological process of their making.

4

Aprobacíâ mobilnogo kompleksu repernih točok temperaturi

Prohorenko S., Stadnik B., Ivanova K., Kovalčik A., Vojturskij Â.

Zeszyty Naukowe Politechniki Rzeszowskiej. Elektrotechnika

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2005

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z. 28 [223]

123--124

EN

In this work are presented the results of researches on humidity sensor with net electrodes. The construction of this kind of sensor and its modus operandi is showed. On the diagrams are presented dynamics and frequency characteristics of the sensor.