Heat Exchanger Research Paper

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Heat Exchanger is a device that is used to transfer thermal energy between two fluids or more fluids , between a solid surface and a fluid, or between solid particulates and a fluid, at different temperatures and in thermal contact. In heat exchangers, there are usually no external heat and work interactions. Typical applications involve heating or cooling of a fluid stream of concern and evaporation or condensation of single or multi component fluid streams. In other applications, the objective may be to recover or reject heat, pasteurize, fractionate, distill, concentrate, crystallize, or control a process fluid. In a few heat exchangers, the fluids exchanging heat are in direct contact.
Heat Exchangers play a important role in energy conversion …show more content…

They are used in industry as liquid to air heat exchangers such as automobile radiators , heater cores , condensers , evaporators of HVAC systems , aircraft oil coolers, unit air heaters , intercoolers of compressors. Thermodynamically, the effectiveness for the cross-flow exchanger falls in between that for the counter-flow and parallel-flow arrangements. This is one of the most common flow arrangements used for extended surface heat exchangers, because it greatly simplifies the header design at the entrance and exit of each …show more content…

A separate header tank is provided at the upper end of the collector tank to prevent the aeration and also to provide a coolant reserve.
Radiator matrix or core :The different types of radiator matrices as shown in figure 1.3 used for the cooling of the water. The radiator core is divided into the separate and complicated parts -one act as a separate passage and other as a air passage. Earliest radiator as shown in figure 1.3(a) used a honeycomb block which was made by a large number of circular tubes upset at each end to hexagonal shape.[25] The hexagons were packed in contact and bound by solder. This provided a continuous water passage between the circular parts of the tubes. The cooling air is passed through the circular tubes.
The film type of matrix which is also called ribbon-cellular matrix. It consists pair of thin metal ribbons soldered together along their edges so to form a waterway running from header tank to collector tank. Between two waterways is a copper ribbon forming air passages. The copper ribbon act as a air fins. Water flows from the top to bottom and gives up heat to the fins across which air flows from front to back. Due to zigzag passage metal surface area is increased and turbulence also created. The shape of the fin is such that smooth layer of air flow

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