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When high temperatures may damage a heated fluid and heating requirements are low enough that can be met by the heating media temperature. Cocurrent flow heat transfer has lower heating (or cooling) capacity than counterflow and there is a theoretical cocurrent flow temperature limit achievable which is lower in heating (or higher in cooling) than the temperature achievable in counterflow.
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What is the aim of the countercurrent flow in the hemodialysis dialyzer?
In creating hemodialysis dialyzers, either a countercurrent or cocurrent flow can be used between the unfiltered blood and the dialysate used to clean the blood. Using a differential material balance (fluid mechanics) on the fluid and solute entering and leaving the device, the molar flow rate of the blood into the dialysate can be calculated. Without showing the math behind it, countercurrent flow if more efficient at cleaning the blood than cocurrent flow in a hemodialysis dialyzer. The reason for this is because the countercurrent flow allows the outlet concentration of the dialysate to exceed the outlet concentration of the blood, and approach the inlet concentration of the blood. With cocurrent flow, the exit concentration of the dialysate is slightly less than the outlet concentration of the blood, but much less than the inlet concentration. Physically speaking, countercurrent flow optimizes the concentration gradient throughout the length that the dialysate and blood are flowing next to one another. This causes more urea to diffuse through the membrane within this length, allowing the blood to be cleaned faster than cocurrent flow.
Why counter current heat exchanger is more efficient?
Countercurrent heat exchangers are more efficient because they allow hot and cold fluids to flow in opposite directions, maximizing the temperature gradient throughout the length of the exchanger. This design enables a greater surface area for heat transfer and ensures that the cold fluid continuously encounters hotter fluid, maintaining a higher temperature difference. As a result, more heat is transferred compared to parallel flow designs, where the temperature difference diminishes along the flow path. Additionally, countercurrent flow reduces the risk of thermal shock and enhances overall system performance.
How you can increase the retention time in shell and tube heat exchanger?
the most effective way to do so is to reduce the flow of the heat exchanger
What is a furnace with a vertical air flow through the heat exchanger and the blower compartment beneath the heat exchanger called?
A furnace with a vertical air flow through the heat exchanger and the blower compartment located beneath the heat exchanger is typically called a "downflow furnace." This design allows air to be drawn in from the top, heated as it passes through the heat exchanger, and then expelled from the bottom into the living space. Downflow furnaces are commonly used in applications where the furnace is installed in a basement or crawl space.
What is the factors that effect on number of tubes in shell and tube heat exchanger?
The factors that are affected by number of tubes in shell and tube heat exchanger is the rate of heat transfer and flow rate.
What is the aim of the countercurrent flow in the hemodialysis dialyzer?
In creating hemodialysis dialyzers, either a countercurrent or cocurrent flow can be used between the unfiltered blood and the dialysate used to clean the blood. Using a differential material balance (fluid mechanics) on the fluid and solute entering and leaving the device, the molar flow rate of the blood into the dialysate can be calculated. Without showing the math behind it, countercurrent flow if more efficient at cleaning the blood than cocurrent flow in a hemodialysis dialyzer. The reason for this is because the countercurrent flow allows the outlet concentration of the dialysate to exceed the outlet concentration of the blood, and approach the inlet concentration of the blood. With cocurrent flow, the exit concentration of the dialysate is slightly less than the outlet concentration of the blood, but much less than the inlet concentration. Physically speaking, countercurrent flow optimizes the concentration gradient throughout the length that the dialysate and blood are flowing next to one another. This causes more urea to diffuse through the membrane within this length, allowing the blood to be cleaned faster than cocurrent flow.
Advantage of shell and tube heat exchanger over double pipe heat exchanger?
**** you.......... pls somebody answer Double pipe heat exchanger consists of two concentric pipes of different diameters.One pipe is for hot fluid and another is for cold fluid.Both may have same flow direction(COCURRENT) and opposite direction(COUNTERCURRENT). Shell and tube heat exchanger consists of a shell in which large number of parallel tubes are present.One fluid hot or cold flow in shell and other hot or cold flow in the tubes. Also in case of shell & tube(S&T) the hot fluid will have more turbulence than in double pipe heat exchanger (HE) since there are no of tubes within a shell the area for convective heat transfer is considerably increased. so these are much more preferredTherefore the rate of heat transfer is greater in shell and tube because large surface area and enough contacting time
How does countercurrent heat exchanger conserve heat?
The method employed in conserving heat is counter-current heat exchange. This utilizes blood vessel arrangement to contain warm blood in the core and colder blood in the extremities. Arteries moving away from the core run in close proximity to the veins that are returning blood to the heart. This conformation allows heat from the warm arterial blood to be transferred.
Why counter corrent flow is better than cocurrent flow for heat transfer?
Counter-current flow is more efficient for heat transfer because it maintains a higher temperature gradient along the entire length of the heat exchanger, allowing for a more continuous and effective transfer of heat. As the hot and cold fluids move in opposite directions, the temperature difference between them remains large resulting in a more efficient heat exchange process. In contrast, in co-current flow, the temperatures of the fluids tend to equalize more quickly along the length of the heat exchanger, reducing the overall effectiveness of heat transfer.
What has the author Aldo Sebastiani written?
Aldo Sebastiani has written: 'Solvent extraction of copper with LIX64N in a cocurrent flow packed bed'
Countercurrent below the Gulf Stream has been confirmed In what direction is this current most likely to flow?
southwest
How you can increase the retention time in shell and tube heat exchanger?
the most effective way to do so is to reduce the flow of the heat exchanger
The existence of a countercurrent below the Gulf Stream has been confirmed In what direction is this current most likely to flow?
Southeast
An example of a countercurrent is what?
In the human body, the countercurrent exchange system in the nephrons of the kidney allows for efficient reabsorption of water and ions. Blood flow and filtrate flow travel in opposite directions, enhancing the exchange of solutes between the blood and the filtrate for optimal water conservation.
What is split flow heat exchanger?
A split flow heat exchanger is a type of heat exchanger where the hot and cold fluids are split into multiple streams before being recombined. This design allows for more efficient heat transfer as it increases the surface area of contact between the two fluids. Split flow heat exchangers are commonly used in industrial processes where precise temperature control is required.
What is a furnace with a vertical air flow through the heat exchanger and the blower compartment beneath the heat exchanger called?
A furnace with a vertical air flow through the heat exchanger and the blower compartment located beneath the heat exchanger is typically called a "downflow furnace." This design allows air to be drawn in from the top, heated as it passes through the heat exchanger, and then expelled from the bottom into the living space. Downflow furnaces are commonly used in applications where the furnace is installed in a basement or crawl space.
What Is The Purpose Of Countercurrent Flow In Dialysis?
Increased sodium and chloride ion concentrations in the interstitial fluid of the renal medulla is the result of countercurrent mechanisms
