A counterflow heat exchanger has equal hot- and cold-stream heat-capacity rates and effectiveness 0.8. What is its NTU?
4
For equal heat-capacity rates in counterflow, \(\epsilon=NTU/(1+NTU)\). Thus NTU=0.8/0.2=4.
Important Questions from Heat Exchanger
Heat exchangers are used in
A. Condensers and boilers in steam plants
B. Radiators
C. Intercoolers and preheaters
D. Condensers and evaporators in refrigerators and air conditioners
For a specified inlet and outlet temperatures, for which kind of heat exchange will the log mean temperature difference, ΔTlm will be highest?
The fouling factor in case of heat exchangers is given by ________
In heat transfe,r NTU is given by ________.
(Where U = heat transfer co-efficient, A = surface area, C = Heat capacitance, min = Minimum, max = Maximum
Which of the following heat exchangers gives parallel and linear temperature profile for both cold and hot fluid?
