Quiz - How Heat Exchangers Work

Consider a fluid moving through a tube with constant surface temperature. The difference between the fluid bulk temperature and the tube wall temperature:

Consider a fully developed laminar flow in a pipe with constant diameter and constant surface heat flux. The heat transfer coefficient is:

A cold fluid moving through a hot pipe would experience a viscosity variation near the wall due to temperature difference. In this case which of the following statement is true?

For flows at $Pr<1$, the thermal entrance length is _______ the hydrodynamic entrance length

A tube with an internal twisted tape can be used to enhance the heat transfer by:

Coiling a tube for thermal applications has the following effects:

A fully developed temperature profile for an internal flow is:

A tube with internal longitudinal fins can be used to enhance the heat transfer by:

Heat Exchanger effectiveness ($\varepsilon$) is defined as

In which of the following heat exchanger configurations do the hot and cold fluids move perpendicular to each other?

Baffles are used in the shell-and-tube heat exchangers to

Which of the following leads to fouling of a heat exchanger?

In the case of double pipe heat exchangers, for having the same amount of heat transfer -

Which type of heat exchanger relies on the intermittent storage of heat in a thermal storage medium before transmitting it to the cold fluid.