Intercooler, what is it? The installation and operation. Intercooler for Nissan and Mercedes
Table of contents:
All cars – is a set of components, mechanisms that with proper installation operate smoothly and stably. For example, between the compressor and the intake manifold is the radiator, which is called the intercooler. What is it, knows someone who has been repairing your car yourself. Why do we need this element, try to understand.
Heat Exchange should take place correctly
The Main purpose of the intercooler – extracting heat from an air stream, which during the compression process in the compressor is heated. That is, the better is the heat removed, the better the heat exchanger works. To turbosistema with intercooling was correctly assembled, it is very important to make maximum use of useful properties of the described device. In addition, competent installation of the intercooler will ensure that in the process of operation of the vehicle will have no problems. By creating this unit, you need to consider several criteria, chief among which are the following:
- Maximum heat dissipation;
- Minimal loss of boost pressure;
- Increase the inertia of the air flow.
How does the cooler air flow?
That heat from the system was given correctly and in a timely manner, respond to plate and shell heat exchanger. They make up the heat exchanger area, which depends on the efficiency of the intercooler. However, one should not think that if the area will be twice more, and the efficiency of the unit will be doubled. But if you make a heat exchanger area more than ten per cent, then exactly the same will be higher efficiency. To understand how the intercooler that is behind the device, it is important to know the features of his device.
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So, it passes through the air, and if you do it to him hard, then heat will be lost a lot. On the other hand, it is important to avoid large losses of the boost pressure. To compensate for the shortness of flow of air through our device you need to ensure that the internal bore was big: this will hold the air in the intercooler and reduce air flow. Accordingly, pressure will be lost at an acceptable level. Thus, choosing this unit, you should take care of low internal pressure loss.
Important internal volume
The job of the intercooler is stable, if it is properly selected. So, the volume inside of this device have to be filled with air completely, and before the intake manifold there is a pressure. That amount is one of parameters that must be optimized when you create a competent system of intermediate cooling. This indicator can be calculated as follows:
- The internal volume of the intercooler is divided by the amount of air flow;
- Multiply the resulting amount by two (this figure is taken approximately: so that the air stream towards the acceleration is doubled).
In the design of the intercooler is important to consider the maximum capability of the system to withdraw heat from the charge air, in order to reduce the boost pressure and not to interfere with the air pressure to increase.
Power and efficiency - key indicators
Cooling System in the car needs to run smoothly. You need to know how much power is lost in the pressure loss of the intercooler. Correlate the rate of absolute pressure with a device without it. It should also be remembered that it is not necessary to recover lost capacity, because in this case will be higher than the pressure in the exhaust manifold, which will lead to an increase in reverse exhaust in the combustion chamber and increase the temperature therein.
To calculate the efficiency of the intercooler need to compare the increase in air temperature, which causes the turbine and lowering the temperature, which is cooler. Today you can buy two types of this device: "air-air" or "air-water". A simple construction is the first option, while he also has the higher efficiency at high speed. In addition, it has a higher reliability, and to maintain such a device much easier. The intercooler is of the type "air-water" shows good efficiency at low speed, thus has a complicated structure and costs more. But at the same time the intercooler pipe "air-air" is supplied harder the unit needs more space, so this device is not suitable for each car.
Balanced intercooler: what is it?
To the intercooler was perfectly balanced, it is important to meet some of the requirements:
1. The internal bore should be good. It is the core section of the heat exchanger affects how much is lost pressure in the air passage. To calculate correct cross section is almost impossible, but you can at least predict how it should be. For example, you can use the turbulence, which do not allow air to cling to the walls of the Assembly and to give him heat. The density of turbulence depends on the superior heat transfer and low flow losses.
2. A major role is played by the size of the kernel. The shorter the channels through which the air passes, the lower bore section.
3. Frontal area reflects the amount of ambient air contributes to the cooling of the inflatable air. Accordingly, the more the surrounding air mass, the higher the cooling capacity of the intercooler.
4. The streamlined shape of the nucleus. This parameter determines the free movement of air through the device, while the lighter the air, the more its volume will pass through the intercooler (which is directly affect the cooling effect, no doubt).
5. Characteristics of the chiller can be improved at the expense of the channels that will bring cooling air. Experts believe that using a good channel, it is possible to achieve improved efficiency of the heat exchanger by approximately 20%.
6. The amount and rate of airflow depends on the size and shape of the pipe.
7. Affect the stability of the intercooler indicators such as bends and transitions sections and nozzles. By the way, any bend in the system – the potential flow losses. But if the leaking pipes are connected, you will lose boost pressure.
Located Where the radiator of the intercooler?
Typically this unit is in free space where a lot of space. Most importantly –do not install it in the engine compartment or behind the cooling radiator, because the boost pressure is low, the air will not warm up. In such cases the cooler acts as a kind of intermediate heater. It is worth remembering that heating the intercooler from the heat under the hood can lead to serious problems. Therefore, it is necessary to isolate the unit and carefully place all of the pipe. As a rule, the air type intercooler is installed in the space, e.g. behind the front bumper in the center, above the engine under the hood or at the side of the wings (either side).
The Main problems in the operation
One of the serious problems – oil in the intercooler. Such situations may be caused by the wear sleeve of the turbine, which, incidentally, can be fixed. In addition, a similar problem may arise from the fact that at high revs the engine even in the new turbine can handle the oil in the intake channel. During the operation oil in the intercooler can gain a lot, but this problem is easily solved – all you need to clean the unit.
Each vehicle – your intercooler
Today it is very common of a cooler for a specific engine. For example, intercooler Nissan for each model of this brand fits different. Therefore, choosing a chiller, you need to consider a lot of parts: the frontal area of the heat exchanger and its thickness, the direction of flow, the internal flow area and much more. At the same time, new cars "Nissan" equipped with "clean" engines, which is not put neither the intercooler nor turbo.
The Intercooler Mercedes is a heat exchanger which reduces the temperature of the passing through it of air. In most models of this brand, the heat exchanger is located in front of the compartment for the engine and is blown in a natural way while driving a vehicle.
Why you need a intercooler?
That is, will ask many – once the bells and whistles in the car or do the necessary thing? And is it worth it to install? Most experts agree that turbocharged engines require it. In addition, today you can choose the different configurations of this device, which, however, does not in any way affect its performance. That is, any aesthetic delights of, say, some kind of original form and design of the receivers of intercoolers, the role is more decorative than functional.
Experts also advise to choose the units made from thin sheet metal, since it will maximize heat retention. Choose the type of intercooler depending on what the specific features of the existing turbines.
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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."
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