Recent questions tagged thermodynamic-cycles

Consider an ideal Otto-cycle with cold-air-standard assumptions to be applicable. The temperature of the working fluid at the start and the end of the compression process...

Consider an ideal Rankine cycle with fixed conditions at the turbine inlet. If the condenser pressure is lowered, which of the following statements is/are CORRECT?Pump wo...

Consider an ideal Diesel-cycle with cold-air-standard assumptions to be applicable. The compression ratio is $20$ and the cut-off ratio is $1.8$. At the end of the compre...

​​​A tank is divided into two compartments with one compartment containing a gas at a given pressure, while the second is completely evacuated. If the partition is remove...

​​​The inlet and outlet temperatures of the flowing fluid during a steady state flow process are the same as that of the surroundings. If the changes in kinetic and poten...

​​​​​If $\gamma$ refers to the ratio of specific heats, the air-standard efficiency of an Otto cycle is$1-\frac{1}{(\text { Compression ratio })^{\gamma}}$$1-\frac{1}{(\t...

​​​​​Let $T_{H}$ and $T_{L}$ denote the absolute temperatures of high and low temperature reservoirs, respectively. The coefficient of performance of a reversible refrige...

A heat engine having thermal efficiency of $40 \%$ receives heat from a source at $600 \: \mathrm{K}$ and rejects heat to a sink at $300 \: \mathrm{K}$. The second-law ef...

​​​​For an ideal gas turbine cycle, $T_{1}$ and $T_{3}$ are the compressor inlet temperature and turbine inlet temperature respectively. The ratio $\frac{T_{3}}{T_{1}}$ i...

Air in an ideal Diesel cycle is compressed from $3 \: \mathrm{litre}$ to $0.15 \: \mathrm{litre}$. It then expands during a constant pressure heat addition process to $0....

Air enters a hair dryer at $22^{\circ} \mathrm{C}$ and $100 \: \mathrm{kPa}$ with a velocity of $3.7 \mathrm{~m} / \mathrm{s}$, and leaves the dryer at $83{ }^{\circ} \ma...

A power plant operates on a simple ideal Rankine cycle. If superheating is added to this cycle, then which one of the following options is CORRECT ?Pump work increases, t...

Following data is for an actual vapour compression refrigeration cycle. Enthalpy at compressor inlet: $246 \mathrm{~kJ} / \mathrm{kg}$Enthalpy at compressor exit: $286 \m...

A fixed mass of an ideal gas undergoes two different cycles $\mathbf{M}$ and $\mathbf{N}$ as shown in the Pressure $(P)$ - Volume $(V)$ diagrams. Based on the information...

Consider the following data from a Brayton cycle.Enthalpy at inlet to turbine; $1400 \mathrm{~kJ} / \mathrm{kg}$Enthalpy at exit of turbine: $880 \mathrm{~kJ} / \mathrm{k...

\begin{tabular}{|l|l|}Q.98 & \begin{tabular}{l}An ideal Diesel cycle has a compression ratio of 20 and cut-off ratio of 1.5. At the \\beginning of the compression stroke,...

Q. 104 Consider a spark ignition engine which operates on an ideal air-standard Otto cycle. It uses a fuel which produces $44 \mathrm{MJ} / \mathrm{kg}$ of heat in the en...

Q. 106A steam power plant operates on a simple ideal Rankine cycle. The condenser pressure is $10 \mathrm{kPa}$ and the boiler pressure is $5 \mathrm{MPa}$. The steam ent...