This article is about radiators in automobiles, buildings, and electronics. Unsourced material may be challenged and removed. Spacecraft radiators necessarily must function of engine cooling system pdf radiation only to reject heat. The term “convector” refers to a class of devices in which the source of heat is not directly exposed.
Radiators are commonly used to heat buildings. The fins then release the heat to the ambient air. Fins are used to greatly increase the contact surface of the tubes to the air, thus increasing the exchange efficiency. The cooled coolant is fed back to the engine, and the cycle repeats.
Normally, the radiator does not reduce the temperature of the coolant back to ambient air temperature, but it is still sufficiently cooled to keep the engine from overheating. However, the coolant may also be an oil. The main inducements for aluminium are reduced weight and cost. However, the superior cooling properties of Copper-Brass over Aluminium makes it preferential for high performance vehicles or stationary applications. Its performance advantages over radiators made with other materials include better thermal performance, heat transfer, size, strength, durability, emissions, corrosion resistance, repairability, and antimicrobial benefits. To save fan power consumption in vehicles, radiators are often behind the grille at the front end of a vehicle. As electronic devices become smaller, the problem of dispersing waste heat becomes more difficult.
Radiators are found as components of some spacecraft. On the International Space Station these can be seen clearly as large white panels attached to the main truss. They can be found on both manned and unmanned craft. This page was last edited on 4 November 2017, at 18:27. Enter the terms you wish to search for. Engine issues inevitably cause problems in the cooling system, and vice versa.
The most important function of the coolant in your cooling system is to transfer heat from the hot metal surfaces to the radiator. If the metal surfaces suffer any type of contamination this ability is reduced, putting excess strain on oil and engine components and ultimately resulting in premature failures. Whether it is rust or other types of corrosion, oil or fuel contamination, or even scale from using poor quality water, Cummins Filtration has cleaning agents for your cooling system that will restore it to like new condition. Our Restore and Restore Plus products are designed to treat specific kinds of contamination issues and are effective in assisting your cooling system to operate at peak efficiency.
Simple to use and effective, Restore and Restore Plus will bring your cooling system back to life without harming metal surfaces, gaskets, hoses or plastic parts. For PG Plus, a chemical concentration of 0. When testing a mixed coolant for SCA content, always use Cummins Filtration’s CC2602 test kit for proper chemical concentration measurement. What is the difference between DCA2 and DCA4? The difference between the two forms of DCA is the chemical makeup.
DCA4 is a phosphate, nitrite and molybdate-based additive. DCA4 is recommended by many OE manufacturers, including Cummins, Navistar, Ford, John Deere, and others. My cooling system is contaminated with rust, scale, oil or grease. What is the solution for these problems? Cummins Filtration’s cleaner Restore Plus eliminates rust, scale, oil and grease with its special acid-based formula. How much DCA4 should be added at service intervals? It depends on system capacity.