Analysis LMTD method -AND NTU method

What does the LMTD method stand for?

• Logarithmic Mean Temperature Difference
• Longitudinal Mass Transfer Diagram
• Limiting Mean Thermal Displacement
• Low Molecular Transport Density

What is the NTU method used for in heat exchanger analysis?

• To calculate the overall heat transfer coefficient
• To analyze the fouling factors of a heat exchanger
• To determine the heat duty of a heat exchanger
• To estimate the required size of a heat exchanger

In which situation is the LMTD method not applicable for heat exchanger analysis?

• When there is a phase change during heat transfer
• When the fluid properties are constant
• When there is no temperature change across the heat exchanger
• When there is a large temperature difference between the two fluids

What is the relationship between the effectiveness of a heat exchanger and the NTU value?

• They are inversely proportional
• They are directly proportional
• They are not related
• It depends on the type of heat exchanger

What is the formula for calculating the overall heat transfer coefficient in the LMTD method?

• U = Q / (A * ΔT)
• U = k / L
• U = 1 / h
• U = F * (k / L)

What is the purpose of the NTU method?

• To calculate the heat transfer area of a heat exchange
• To estimate the heat duty of a heat exchanger
• To determine the overall heat transfer coefficient of a heat exchanger
• To analyze the heat exchanger performance using a dimensionless parameter

What is the significance of the heat capacity rate ratio in the NTU method?

• It determines the number of transfer units
• It affects the heat exchanger effectiveness
• It is used to calculate the log-mean temperature difference
• . It is not related to the NTU method