# Thermal

## 1 kg of steam at 8 bar. entropy 6.55 kJ/kg K. solved problem

1 kg of steam at 8 bar. entropy 6.55 kJ/kg K. is heated reversibly at constant pressure until the temperature is 200 °C. Calculate the heat supplied, and show on a T-s diagram the area which, represents the heat flow. 1 kg of steam at 8 bar. entropy 6.55 kJ/kg K. is heated reversibly at …

## Constant pressure of 2 bar until the volume. solved problem

0.08 kg of dry steam is heated at a constant pressure of 2 bar until the volume occupied is 0.10528 m3. Calculate : (i) Heat supplied ; (ii) Work done. 0.08 kg of dry steam is heated at a constant pressure of two bar until the volume occupied is 0.10528 m3. Calculate : (i) Heat …

## Cylinder is cooled the pressure is 60 bar. solved problem

A rigid cylinder of volume 0.028 m3 contains steam at 80 bar and 350°C. The cylinder is cooled until the pressure is 60 bar. Calculate : (i) The state of steam after cooling ; (ii) The amount of heat rejected. by the steam. A rigid cylinder of volume 0.028 m3 contains steam at 80 bar …

## Air at a temperature of 20 °C passes… solved problem

Air at a temperature of 20 °C passes through a heat exchanger at a velocity of 40 m/s where its temperature is raised to 820°C. It then enters a turbine with same velocity of 40 m/s and expands till the temperature falls to 620°C. On leaving the turbine, the air is taken at a velocity …

## Cooled until the pressure is 50 bar… solved problem

A rigid cylinder of volume 0.028 m3 contains steam 80 bar and 350 °C. The cylinder is cooled until the pressure is 50 bar. Calculate : (i) The state of steam after cooling; (ii) The amount of heat rejected by the steam. A rigid cylinder of volume 0.028 m3 contains steam 80 bar and 350 …

## Speed of a turbojet engine is 250 m/s… solved problem

During flight, the air speed of a turbojet engine is 250 m/s. Ambient air temperature is – 14 °C. Gas temperature at outlet of nozzle is 610 °C. Corresponding enthalpy values for air and gas respectively 250 and 900 kJ/kg. Fuel air ratio is 0.0180. Chemical energy of fuel is 45 MJ/kg. Owing to incomplete …

## A centrifugal pump delivers 50 kg … solved problem

A centrifugal pump delivers 50 kg of water per second. The inlet and outlet pressures are 1 bar and 4.2 bar respectively. The suction is 2.2 m below the centre of the pump and delivery is 8.5 m above the centre of the pump. The suction and delivery pipe diameters are 20 cm and 10 …

## A pressure of 2 bar and a velocity of 300… solved problem

The gas leaving the turbine of a gas turbine jet engine flows steadily into the engine jet pipe at a temperature of 900°C, a pressure of 2 bar and a velocity of 300 m/s relative to the pipe. Gas leaves the pipe at a temperature of 820°C and a pressure of 1.1 bar. Heat transfer …

## a pressure of 2.5 bar (h = 192 kJ/kg)…. solved problem

In one of the sections of the heating plant in which there are no pumps enters a steady flow of water at a temperature of 50°C and a pressure of 3 bar (h = 240 kJ/kg), The water leaves the section at a temperature of 35°C and at a pressure of 2.5 bar (h = …

## enthalpy of fluid passing is 2800 kJ/kg…. solved problem

At the inlet to a certain nozzle the enthalpy of fluid passing is 2800 kJ/kg, and the velocity is 50 m/s. At the discharge end the enthalpy is 2600 kJ/kg. The nozzle is horizontal and there is negligible heat loss from it. (i) Find the velocity at exit of the nozzle. (ii) If the inlet …