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GATE Mechanical Engineering · Heat Transfer - Heat Exchangers · 1988-2024

16
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31%
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elite explanations
12
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2024 Q49

A condenser is used as a heat exchanger in a large steam power plant in which steam is condensed to liquid water. The condenser is a shell and tube heat exchanger which consists of...

hard
2024 PYQ

A condenser is used as a heat exchanger in a large steam power plant in which steam is condensed to liquid water. The condenser is a shell and tube heat exchanger which consists of...

mediumbasic explanation
2023 Q35

Consider a counter-flow heat exchanger with the inlet temperatures of two fluids (1 and 2) being T₁, in = 300 K and T₂, in = 350 K. The heat capacity rates of the two fluids are C₁...

medium
2023 PYQ

Consider a counter-flow heat exchanger with the inlet temperatures of two fluids (1 and 2) being T 1, in = 300 K and T 2, in = 350 K. The heat capacity rates of the two fluids are...

easybasic explanation
2022 PYQ

During open-heart surgery, a patient’s blood is cooled down to 25 °C from 37 ° C using a concentric tube counter-flow heat exchanger. Water enters the heat exchanger at 4 ° C and l...

mediumbasic explanation
2022 PYQ

Saturated vapor at 200 °C condenses to saturated liquid at the rate of 150 kg/s on the shell side of a heat exchanger (enthalpy of condensation h fg = 2400 kJ/kg). A fluid with C p...

mediumbasic explanation
2015 PYQ

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 conden...

easyanswer key
2015 PYQ

A balanced counter-flow heat exchanger has a surface area of $$20\,\,{m^2}$$ and overall heat transfer coefficient of $$20$$ $$W/{m^2}$$-$$K$$. Air $$\left( {{C_p} = 1000J/kg - K}...

mediumanswer key
2014 PYQ

In a concentric counter flow heat exchanger, water flows through the inner tube at $${25^ \circ }C$$ and leaves at $${42^ \circ }C$$. The engine oil enters at $${100^ \circ }C$$ an...

medium
2012 PYQ

Water $$\left( {{C_p} = 4.18\,kJ/kg.K} \right)$$ at $${80^ \circ }C$$ enters a counter flow heat exchanger with a mass flow rate of $$0.5kg/s.$$ Air $$\left( {{C_p} = 1\,kJ/kg.\,K}...

mediumanswer key
2009 PYQ

In a parallel flow heat exchanger operating under steady state, the heat capacity rates (product of specific heat at constant pressure and mass flow rate) of the hot and cold fluid...

mediumanswer key
1999 PYQ

Two fluids, $$A$$ and $$B$$ exchange heat in a counter-current heat exchanger. Fluid $$A$$ enters at $${420^ \circ }C$$ and has a mass flow rate of $$1$$ $$kg/s.$$ Fluid $$B$$ ente...

medium
1998 PYQ

A hot fluid at $${200^ \circ }C$$ enters a heat exchanger at a mass flow rate of $${10^4}\,\,kg/hr.$$ Its specific heat is $$2000$$ $$J/kg$$-$$K.$$ It is to be cooled by another fl...

medium
1997 PYQ

In certain $$HE,$$ both the fluids have identical mass flow rate-specific heat product. The hot fluid enters at $${76^ \circ }C$$ and leaves at $${47^ \circ }C$$ and the cold fluid...

easyanswer key
1994 PYQ

Two streams of fluid of unit constant specific heats and unit mass flow rate exchange thermal energy in an adiabatic heat exchanger. The inlet temps of hot and cold streams are $${...

hard
1988 PYQ

A shell and tube heat exchanger is to be designed for heating pressurized water by means of hot gasses which get cooled the data are as follows Temp of water at the inlet $$ = \,80...

medium