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Counterflow heat exchangers typically transfer more heat to a fluid simply because the hottest part of the exchanger is where the heating medium enters the heater and the heated medium leaves the heater. In a parrallel flow exchanger the hottest part of the heater is where the heating medium enters, and the coolest part where the heated medium enters, and some temperature in between is found where both exit the heater.
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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.
What is the sole purpose of a heat exchanger?
The purpose of a heat exchanger is that it transfers heat from a liquid to another fluid on the opposite side of a barrier. There are two kinds of heat exchangers parallel-flow and counter-flow.
Why a parallel counter is capable of faster operation than a ripple counter?
The parallel counter incorporates carry lookahead circuits so that all flip-flops in the counter change in sync with the clock pulse. The ripple counter each flip-flop output is the clock for the next flip-flop, causing the most significant bit of the counter to settle only after a long delay time from the input clock pulse.
How do you use the Transistor output terminals of an electronic counter in a Electrical control circuit?
They use transistor as the purpose to transfer the voltage
What type of counter is used in digital wrist watch?
binary divide by 32768 between the crystal oscillator and the seconds digitdecimal counter (0 to 9) for the seconds digitsix counter (0 to 5) for the tens of seconds digitdecimal counter (0 to 9) for the minutes digitsix counter (0 to 5) for the tens of minutes digitduodecimal counter (1 to 12) for the hours digitsbinary counter for the AM/PM indicator
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.
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.
What is ntu in thermodynamics?
NTU is nothing but Number of Transfer Units. It is one of the method used to find the heat transfer of hot and cold body it is applicable to both parallel and counter flow.============The NTU Method is used to calculate the rate of heat transfer in heat exchangers when there is insufficient information to calculate the Log-Mean Temperature Difference (LMTD). If fluid inlet and outlet temperatures are specified or can be determined by simple energy balance, the LMTD method should be used; but when these temperatures are not available The NTU or The Effectiveness method is used. It is based off of the maximum possible heat exchange in an infinitely long heat exchanger. From this, different heat exchangers can be compared and estimates of actual heat exchange calculated based on the NTU effectiveness.
Comparison of Counter-current flow and parallel flow?
Counter-current flow is more efficient then parallel flow. Shahzad, MUET Chemical Engineer
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.
What is the sole purpose of a heat exchanger?
The purpose of a heat exchanger is that it transfers heat from a liquid to another fluid on the opposite side of a barrier. There are two kinds of heat exchangers parallel-flow and counter-flow.
What has the author Mahdi Bin Abdul Wahab written?
Mahdi Bin Abdul Wahab has written: 'Modelling and measurements on a condensing counter-flow heat exchanger'
Why a parallel counter is capable of faster operation than a ripple counter?
The parallel counter incorporates carry lookahead circuits so that all flip-flops in the counter change in sync with the clock pulse. The ripple counter each flip-flop output is the clock for the next flip-flop, causing the most significant bit of the counter to settle only after a long delay time from the input clock pulse.
Heat Exchanger Types and Uses?
heat sink classified according to the shape, the shape is how to dissipate within the selected heat sink that is the main intension here,, k type l type rectangular triangular chassis i know this much u can down load the pdfs for the types how to select the required heat sink 9844354439
What is difference between decade counter and binary counter?
a counter is a counter which counts the data and the decade counter is the counts the decade ones
How did the thermal energy of the cookies transfer to the counter?
The thermal energy of the hot cookies transferred to the cooler counter through a process called conduction. When the cookies were placed on the counter, heat energy moved from the cookies to the counter as they came into direct contact, causing the counter to warm up.
What is the difference between the DN and EN outputs of a timer or counter in a PLC?
PLC differences between timer and counter
