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Rational Liquid Cooling Systems of Internal Combustion Engines

Moshentsev Yuryi, Gogorenko Oleksiy, Dvirna Olha

Advances in Science and Technology. Research Journal

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2022

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Vol. 16, no 1

158--169

EN

The scheme of the cooling system is considered, which can be the basis for creating the most efficient cooling systems for IC engines of any purpose. It is assumed that the use of any other scheme is devoid of a rational basis. The scheme consists of two connected circulation circuits, in one of which the coolant flow rate is an order of magnitude less than in the second. The engine is included in a circuit with increased coolant flow. All heat exchangers are in the second circuit. Rules for the formation of such systems are formulated. The basis of the method for calculating such systems is considered. It is indicated that the flow rate through each heat exchanger must be determined by calculation to ensure the maximum efficiency of the cooling system. The considered scheme allows to provide the maximum possible depth of charge air cooling, if its temperature is not specified, or to ensure the minimum cost and compactness of the cooling system, if this temperature is known. The scheme allows regulating the temperatures of the cooling fluids of the system with all kinds of changes in the engine operating conditions and the ambient temperature.

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Possibilities for Improving the Cooling Systems of IC Engines of Marine Power Plants

Moshentsev Yuryi, Gogorenko Oleksiy, Dvirna Olha

Advances in Science and Technology. Research Journal

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2022

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Vol. 16, no 3

183--192

EN

Modern cooling systems for large ships are quite complex. As a rule, such systems are common (combined) for the main and auxiliaries engines. With the auxiliary engines running constantly, even when parked, this system design allows to keep it warm and ready for a quick start of the main engines at any time. Currently, various schemes of such systems are used, including those that are irrational from our point of view. At the same time, there are systems whose schemes are quite consistent with our idea of the rational forms of such structures. It is important to note, and it is saying about it in an article, that such schemes may have a number of significant differences, but at the same time they will comply with the rationality principle if certain rules for the formation of such systems are followed. These schemes will have close compactness. It is also important that there is the possibility of further improvement of such schemes based on certain rules. This improvement is possible due to the introduction of additional heat dissipaters and the organization of appropriate chains of heat sources and heat dissipaters. The article discusses various options for rational schemes of the cooling system for the same ship power plant, as well as the possibility of further improvement of this scheme. It is shown that an increase in the number of coolants of the internal circuit coolant from one to three can reduce the total mass of the heat exchanger cores by 18 %.

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Diagnostyka chłodnic wodnych oleju transformatorowego bloków energetycznych

Litwinowicz L., Drop M.

Dozór Techniczny

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1998

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z. 4

84--88

PL

Obserwowane w praktyce liczne uszkodzenia rur mosiężnych chłodnic wodnych oleju transformatorowego pociągające za sobą obniżenie mocy, a nawet odstawienia dużych bloków energetycznych spowodowały konieczność zbadania przyczyn tych uszkodzeń oraz oceny trwałości rur mosiężnych używanych do budowy chłodnic. W piśmiennictwie dotychczas najwięcej uwagi poświęcono skraplaczom turbinowym, sieciowym wymiennikom ciepła i wymiennikom regeneracji niskoprężnej. Niewiele jednak uwagi poświęcono chłodnicom wodnym oleju transformatorowego. Uwzględniając fakt, że założenia projektowe określają trwałość rur na 20-30 lat obserwowane uszkodzenia wkładów rurowych chłodnic oleju już po kilku latach eksploatacji wydają się wysoce niepokojące. Poniższy artykuł stanowi podsumowanie materiałów i doświadczeń Energopomiaru w tym zakresie.