A cold air-standard brayton refrigeration cycle

Assignment Help Mechanical Engineering

Reference no: EM13705924

A cold air-standard Brayton refrigeration cycle has a pressure ratio of 4 and a refrigeration rate of 15 kW. Air enters the compressor at -7oC. The high pressure air is cooled to 27 oC by rejecting heat to the surroundings. It is further cooled to -15oC by regenerative cooling before entering the turbine. Assuming constant specific heat at room temperature, Determine:

a) The minimum temperature of the cycle (oC)

b) Coefficient of performance

c) Mass flow rate of air (kg/s)

Reference no: EM13705924

Questions Cloud

Estimate the amount of heat transferred by a single fin : The engine of my go-cart has circular fins, 3 mm thick that are machined into the aluminium of the cylinder (k=240 W/m*K) such that the outer diameter of the cylinder itself (not including the fins) is 10 cm and the fins stick out from the cylinder b..

Consider a slab of solid material of area : Consider a slab of solid material of area A between two large parallel plates a distance Y apart. Give the initial condition and the progression of events that proceeds with time as the lower plate is suddenly brought to a slightly higher temperature..

Increase heat transfer from the tube by adding fins : The outside wall surface of a 25 mm diameter metal tube (k=42 W/m*K) is maintained at 120 C. The tube is located in a room at 25 C and the convective heat transfer coefficient is 34 W/m^2*K. We'd like to increase heat transfer from the tube by adding..

Is the pitcher more likely to be silver or platinum : While visiting San Diego, you find an old milk pitcher at the thrift shop and suspect that it is valuable because the metal is really soft, like most noble metals. You know that silver and platinum look similar, but have way different thermal conduct..

A cold air-standard brayton refrigeration cycle : A cold air-standard Brayton refrigeration cycle has a pressure ratio of 4 and a refrigeration rate of 15 kW. Air enters the compressor at -7oC. The high pressure air is cooled to 27 oC by rejecting heat to the surroundings. It is further cooled to -1..

Kinetic and potential energy effects are negligible : 3 kg of refrigerant 22 undergoes a process for which the pressure-specific volume relation is pv^-0.8 = constant. The initial state of the refrigerant is 12 bar and 60 degrees C. The final pressure is 8 bar. Kinetic and potential energy effects are n..

Two-phase liquid-vapor mixture of refrigerant : A tank contains a two-phase liquid-vapor mixture of refrigerant 22 at 10 bar. The mass of the saturated liquid in the tank is 25 kg and the quality is 60%. Determine the volume of the tank, in m^3, and the fraction of the total volume occupied by sat..

Determine the heat transfer from a single fin : A radiator wall measuring 2 m by 3 m (WxH) is held a temperature of 125 °C. Straight aluminium fins (k = 175 W/mK) are to be mounted on the wall. The fins are 5 cm in length and 0.8 mm thick. The system is allowed to convectively transfer heat to amb..

Determine tension developed in ad cable for equilibrium : Determine the tension developed in AB cable for equilibrium of the 350-lb crate. Determine the tension developed in AC cable for equilibrium of the 350-lb crate. Determine the tension developed in AD cable for equilibrium of the 350-lb crate.

User Account

All Pages