Although the question is easy and also easily available in the book...but I want detailed answer with new technology and modifications...if any link available regarding this quiz can also post here....Thank you..
any device where fluid of one temperature is physically separate but but in contact through a heat conducting barrier to another system may be liquid to air or liquid to liquid Our bodies and breathing is a heat exchanger the best are counter flow where the hot input on onside passes the warm output on the other heat always flows form high temp to low and the biggest temp difference is most efficient
A heat exchanger is a device which couples two fluid flow systems together, such that they are in thermal contact, but they are kept separate by a solid wall. Examples: 1. Flame gasses in a gas water heater are passed across a bundle of pipes of water 2. Air in an air conditioning duct is blown across a set of pipes which evaporate refrigerant. This heat exchanger is called an evaporator. 3. In order to re-cooperate heat from hot water drained out of dormitory showers, the shower discard water flows in a shell between concentric pipes with the fresh water to be heated in the inner pipe. 4. Liquid sodium is put to use in capturing heat from the core of a nuclear reactor. This heat is delivered to a heat exchanger called a boiler, in which the steam of a power plant is boiled to water vapor. The best design of heat exchangers will MINIMIZE the temperature difference across the solid wall (via proper materials selection and geometry design). If you keep the streams as close as practical in local temperature, then you can exchange the most heat between the two streams. If the streams have an extreme temperature difference across the solid wall, not as efficient of a heat exchange occurs.
i've got by no ability heard of any gadget talked approximately as a heating exchanger, and that i'm a mechanical engineer. the warmth exchanger is definitely an considerable gadget. A warmth exchanger is a gadget that helps 2 streams of fluid to replace warmth with out actual touch or mixing. It incorporates 2 passage-techniques for fluid to bypass, separated via a conductive good wall, and ideally insulated from our surroundings. this helps the fluids to stay separate, and at diverse pressures, on the two sides of the warmth exchanger. the suited layout, presuming countless length available, is a pipe-in-pipe warmth exchanger, related in counterflow. One fluid flows in the outer annular area between the pipes, yet another fluid flows interior the interior pipe. The outer pipe must be insulated from our surroundings. The worst layout, is strictly as above, different than in parallel bypass. because of the fact countless length isn't available, and that's often considerable to get a extra sensible component ratio, different geometries of warmth exchangers are plenty extra in many situations going on.
Put simply, a heat exchanger is a device which transfers heat from one medium to another, a Hydraulic Oil Cooler or example will remove heat from hot oil by using cold water or air. Alternatively a Swimming Pool Heat Exchanger uses hot water from a boiler or solar heated water circuit to heat the pool water. Heat is transferred by conduction through the exchanger materials which separate the mediums being used. A shell and tube heat exchanger passes fluids through and over tubes, where as an air cooled heat exchanger passes cool air through a core of fins to cool a liquid.
A heat exchanger is a device built for efficient heat transfer from one medium to another. The media may be separated by a solid wall, so that they never mix, or they may be in direct contact.[1] They are widely used in space heating, refrigeration, air conditioning, power plants, chemical plants, petrochemical plants, petroleum refineries, and natural gas processing. One common example of a heat exchanger is the radiator in a car, in which the heat source, being a hot engine-cooling fluid, water, transfers heat to air flowing through the radiator (i.e. the heat transfer medium).
