The role of the radiator in cooling the engine


Article By Karl Poire

November 25, 2020, 9:26 am

When the engine is running at full speed, it starts to heat up slowly. To avoid damaging it, keep the temperature below a certain threshold. Several techniques are available to achieve this and the radiator often plays a key role.

What is a radiator?

A radiator is generally a device that transfers heat from one medium to another. In a fluid cooling system, the radiator is composed of several tubes arranged in such a way as to facilitate the circulation of air. The tubes shall be sufficiently spaced and arranged in parallel in this case. In an engine cooling system, these transport the coolant. They are connected to fins in contact with the air to allow the cooling of the liquid. The alloy used for a radiator is a metal with excellent heat conduction properties. In contact with the air, the metal is able to preserve the freshness it has received. In addition, the air can easily come into contact with the radiator due to its composition. The cooling process performed by the latter therefore requires some aeration. For this reason, the radiator is located at the front of the engine. In this way, when the vehicle is moving, it receives air from the outside. In order for the radiator to continue to perform its cooling work, a fan is placed in front of it. When the vehicle is stationary, the fan produces the air required for the radiator. Note, however, that the radiator does not directly cool the engine. Specifically, it is part of the cooling circuit that is responsible for cooling the engine.

The engine cooling system

The combustion of fuel that occurs inside the engine when it consumes fuel is very high. The heat generated is transmitted to the various surrounding mechanical parts and is accentuated by possible friction. However, these mechanical parts can be damaged by this temperature and therefore need to be cooled. Several cooling methods have followed one another and have made many improvements over the years. Currently, the system most used is that involving the use of coolant. It is placed in contact with the hot element and absorbs its heat. It is then directed to a heat sink or radiator. The radiator cools the water and it goes back to the engine. In addition, a radiator is designed to allow a thermal exchange to the air. It is used in various fields to allow temperature regulation. The principle is the same whether used in a computer or in a car.

The cooling circuit

This circuit consists of several beams through which the coolant passes. Durites are tubes that transport the liquid and connect the various elements of the circuit. They are made of flexible waterproof tube, but resistant to high temperatures. In this regard, it should be noted that the engine temperature can reach 800 °C and the fluid circulating in the durite can reach an equally high temperature. In order to circulate, this coolant is sucked in by a pump. The liquid is drawn from the tank and passes through the various parts of the engine where the temperature is high. In some systems, the engine is also placed in contact with the engine oil, separated by a partition, to allow it to cool. Water absorbs heat from these different parts and then it is redirected to the radiator. Once at the radiator, it passes through the tubular networks of the radiator and evacuates the heat. The cooled water is redirected to the engine to start the cooling process again. At start-up, the engine needs to reach a certain temperature level in order to be able to operate. In order to prevent the coolant from preventing it from reaching this temperature, a system initially prohibits access to the engine. It then opens to let the liquid through as soon as the temperature rises. It is important to note that the coolant is not tap water. It is a water with heat transfer additives that are resistant to freezing. It is therefore not possible for frost to become frost in winter.

#a radiator is a metal with excellent heat conduction properties #an engine cooling system #The combustion of fuel #flexible waterproof tube
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