Determine the change in entropy of the surrounding.
please see attachment
Ideal vapor-compression refrigeration system
An ideal vapor-compression refrigeration system operates at steady state with Refrigerant 134a as the working fluid. Superheated vapor enters the compressor at 30 lbf/in2, 20F, and saturated liquid leaves the condenser at 140 lbf/in2. The refrigeration capacity is 5 tons. Determine: -the compressor power in hp -the rate of h ...continues
Ideal vapor-compression refrigeration cycle
An ideal vapor-compression refrigeration cycle, with ammonia as the working fluid, has an evaporator temperature of -20c and a condenser pressure of 12 bar. Saturated vapor enters the compressor, and saturated liquid exits the condenser. The mass flow rate of the refigerant is 3 kg/min. Determine: -the coefficient of perfor ...continues
Find the fuel consumption and the power delivered to the compressor and the propeller.
In the an ideal turbo jet, the engine is designed such that the turbine work is divided equally between the compressor and the propeller. The gas from the turbine discharges to a nozzle for additional thrust. Consider such an engine where the air enters the diffuser at 200 m/s, 40 kPa, 240 K, and a flow rate of 40 kg/s. The comp ...continues
reversible heat engine with multiple reservoirs
The heat engine in the atachment operates reversibly and draws 1200 KJ of heat from the 200 K reservoir. The work produced is 200 KJ. Determine the amount and direction of heat interactions with the other reservoirs.
We have a closed rigid vessel containing 1kg of water at its critical point, which is cooled until the internal pressure reaches 5 bar. What is the dryness fraction and change in internal energy?
Suraj Joshi - clarification required - wet steam properties
Suraj, Firstly, thanks for your initial answer, and apologies for not rating it. I didn't realise I needed to rate it upon receipt, rather than when convenient. If you could just clarify a couple of points relating to your answer though, we'll have another go at the rating bit. (1) "At critical point of water, T= 647.1 ...continues
A well-insulated, shel-and-tube heat exchanger is used to heat water (Cp = 4.18kJ/kg *degC) in the tubes from 20degC to 70degC at a rate of 4.5kg/s. Heat is supplied by hot oil (Cp = 2.30kJ/kg *degC) that enters the shell side at 170degC at arate of 10kg/s. Disregarding any heat loss from the heat exchanger, determin (a) the e ...continues
PLEASE PROVIDE DETAILED SOLNS.
Air flows through the converging-diverging nozzle. The conditions at the inlet side are at standard atmospheric conditions while the density and the temperature at station B is 0.060 lbm/ft3 and 30.5 degree Fahrenheit, while the density at station C is 0.050 lbm/ft3. the velocity at station A is recorded to be at 380 ft/s. Deter ...continues
