Chapter 6, Problem 6.4DOEP

Problem Solving Read and analyze the problems thoroughly. Show your complete solution. BOX YOUR FINAL ANSWERS. Problem 1. In a steady flow apparatus, 135KJ of work is done by each kg of fluid. The specific volume of the fluid, pressure and speed at the inlet are 270 m/g, 500 kPa, and 4.88 fps. The inlet is 9.146 ft above the floor and the discharge pipe is at floor level. The discharge conditions are 600 m/gram, 1 bar and 82.32 fps. The total heat loss between the inlet and discharge is 9 Jig of fluid. In flowing through this apparatus, does the specific internal energy increase or decrease and by how much? Problem 2. Air flow steadily at the rate of 0.5 kg/s through an air compressor, entering at 7 mis speed, 1 bar pressure and 0.95 m/kg specific volume and leaving at 5 m/s, 7 bar and 0.19 m/kg. The internal energy of the air leaving is 90 J/g greater than that of the air entering. Cooling water in the compressor jackets absorbs heat from the air at the rate of 58 kw. Compute the work…

Use direct formula with brief explanation. The following results were obtained from a test on a single-cylinder, four-stroke Diesel engine. Diameter of the cylinder is 30 cm, stroke of the piston is 45 cm, indicated mean effective pressure is 540 kPa and engine speed is 2400 rpm. Calculate the indicated power of the engine.

Solve question no.5 and show a clear and organized solution. Thanks!!!Note: The answer is already given on the bottom side of the problem, just show the solution on how to get it.

Estimate how the following process modifications affect to the efficiency of the gas turbine process, and connect right answers. Increase of the polytropic efficiency of the turbine Choose... Choose... Increases compressor power Decreases the temperature after turbine Increases the temperature after turbine Reduces compressor power Choose... Reheat combustor Compressor intercooling Increase of compressor inlet air temperature + ◆

IMPORTANT NOTE: THE VALUE OF K IS 865 (K=865). PLEASE ANSWER ASAP THANK YOU!!

A simple but non-ideal Rankine cycle operates with water as the working fluid and operating between pressure limits of 75 kPa and 10 MPa. Water enters the pump subcooled by 4°C and 3200 kJ/kg of heat is added in the boiler. The pump has an efficiency of 92% while the isentropic efficiency of the turbine is 94%. Assume there are no pressure losses in the condenser and boiler, and that both the pump and turbine are adiabatic. QUESTION 1 What is the temperature of the pump inlet? QUESTION 2 What is the enthalpy of the water entering the pump, in kJ/kg? Report your answer to two decimal place using rounding. QUESTION 3 What is the enthalpy, in kJ/kg, of the water at the pump outlet? Remember that this is a reversible, open system, with an incompressible substance! Report your answer to one decimal point using rounding.

What is the static air powering watts of a fan designed to deliver 800 m^3/hr of air with a static pressure of 5 cm water column on full delivery.

Draw and explain effect of the following parameters on the performance of the actual internal combustion engine cycle: pumping loss, exhaust blowdown loss

The relative efficiency of a engine will be equal to if air standard efficiency & brake thermal efficiency of engine are 53.4% & 24.4% respectively. (a) 40.7% (B) 13.1% (C) 45.7% (d) 53.4%