Parallel And Counterflow Heat Exchanger Pdf
File Name: parallel and counterflow heat exchanger .zip
Each of the three types of heat exchangers Parallel, Cross and Counter Flow has advantages and disadvantages.
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- Design and Development of Parallel -Counter Flow Heat Exchanger
- Category: Parallel and counterflow heat exchanger pdf
Sridharan, M. October 15, Thermal Sci. June ; 12 3 :
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Heat exchangers are typically classified according to flow arrangement and type of construction. The simplest heat exchanger is one for which the hot and cold fluids move in the same or opposite directions. This heat exchanger consists of two concentric pipes of different diameters. Figure represents the directions of fluid flow in the parallel and counter-flow exchangers. Under comparable conditions, more heat is transferred in a counter-flow arrangement than in a parallel flow heat exchanger.
The Laplace Transform Method is applied to solve the transient response of the counter flow heat exchanger with finite wall capacitance problem. The mathematical model is based on three local energy balance equations which are solved assuming that only the fluid 1 inlet condition is perturbed step change. As any counter flow problem could be reduced to an adequate integral equation, collocation method is used for solving such equation in the presented case. Results are given for the outlet temperatures of both fluids and temperature distributions for both fluids and the wall as an explicit analytical formula. Download to read the full article text.
Design and Development of Parallel -Counter Flow Heat Exchanger
The most common arrangements for flow paths within a heat exchanger are counter-flow and parallel flow. A counter-flow heat exchanger is one in which the direction of the flow of one of the working fluids is opposite to the direction to the flow of the other fluid. In a parallel flow exchanger, both fluids in the heat exchanger flow in the same direction. Figure 9 represents the directions of fluid flow in the parallel and counter-flow exchangers. Under comparable conditions, more heat is transferred in a counter-flow arrangement than in a parallel flow heat exchanger. The temperature profiles of the two heat exchangers indicate two major disadvantages in the parallel-flow design. First, the large temperature difference at the ends Figure 10 causes large thermal stresses.
Heat exchanger description. 2. Parallel flow heat exchangers. 3. Counter flow heat exchangers. 4. Effectiveness. 5. NTU. 6. Phase Change. 7. Constant specific.
Category: Parallel and counterflow heat exchanger pdf
A heat exchanger is a system used to transfer heat between two or more fluids. Heat exchangers are used in both cooling and heating processes. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air. Another example is the heat sink , which is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device to a fluid medium, often air or a liquid coolant. There are three primary classifications of heat exchangers according to their flow arrangement.
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What is Parallel-flow and Counter-flow Heat Exchanger – Definition
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