1
GATE ME 2017 Set 1
Numerical
+1
-0
Saturated steam at $${100^ \circ }C$$ condenses on the outside of a tube. Cold fluid enters the tube at $${20^ \circ }C$$ and exits at $${50^ \circ }C.$$ The value of the Log Mean Temperature Difference $$(LMTD)$$ is _________ $$^ \circ C.$$
2
GATE ME 2016 Set 3
+1
-0.3
For a heat exchanger, $$\Delta {T_{\max }}$$ is the maximum temperature difference and $$\Delta {T_{\min }}$$ is the minimum temperature difference between the two fluids. $$LMTD$$ is the log mean temperature difference. $${C_{\min }}$$ and $${C_{\max }}$$ are the minimum and the maximum heat capacity rates. The maximum possible heat transfer $$\left( {{Q_{\max }}} \right)$$ between the two fluids is
A
$${C_{\min }}LMTD$$
B
$${C_{\min }}\Delta {T_{\max }}$$
C
$${C_{\max }}\Delta {T_{\max }}$$
D
$${C_{\max }}\Delta {T_{\min }}$$
3
GATE ME 2015 Set 3
+1
-0.3
Saturated vapor is condensed to saturated liquid in a condenser. The heat capacity ratio is $${c_r} = {{{c_{\min }}} \over {{c_{\max }}}}.$$ The effectiveness $$(s)$$ of the condenser is.
A
$${{1 - \exp \left[ { - NTU\left( {1 + {C_r}} \right)} \right]} \over {1 + {C_r}}}$$
B
$${{1 - \exp \left[ { - NTU\left( {1 - {C_r}} \right)} \right]} \over {1 - {C_r}\,\exp \left[ { - NTU\left( {1 - {C_r}} \right)} \right]}}$$
C
$${{NTU} \over {1 + NTU}}$$
D
$$1 - \exp \left( { - NTU} \right)$$
4
GATE ME 2014 Set 2
+1
-0.3
In a heat exchanger, it is observed that $$\Delta {T_1} = \Delta {T_2},$$ where $$\Delta {T_1}$$ is the temperature difference between the two single phase fluid streams at one end and $$\Delta {T_2}$$ is the temperature difference at the other end. This heat exchanger is
A
a condenser
B
an evaporator
C
a counter flow heat exchanger
D
a parallel flow heat exchanger
GATE ME Subjects
EXAM MAP
Medical
NEET