12-5. An air-cycle unit operating on the simple system is designed for the following conditions: 15...

12-5. An air-cycle unit operating on the simple system is designed for the following
conditions: 15 lb/min of conditioned air, air entering the turbine at 60 psia, cabin
pressure 14 psia, dry-air rated discharge temperature 20 F, and a turbine efficiency of 80 per
cent.
a. At what temperature does air enter the turbine?
b. How much power does the turbine supply to the fan?

Expert Solution

samet mamat answered 2 years ago

The system with unit feedback is operating with 15% of overdrive.

For the systems below, do what you ask, solve the calculations in a handwritten and step-by-step manner: A) The system with unit feedback is operating with 15% of overdrive. Using frequency response techniques, design a compensator to result in Kv = 50 with margin frequency and the phase margin remaining approximately the same as the system without compensation: G (s) = k / s * (s + 7) B) The unit feedback system shown is operating with a 15% overrun....

A simple saturation cycle of refrigeration system is operating on R22. This system has an evaporator...

A simple saturation cycle of refrigeration system is operating on R22. This system has an evaporator pressure of 350 kPa, condensing pressure of 1550 kPa and a discharge temperature of 80°C. Degree of sub cooling of 8 K and degree of superheat of 5 K. Draw p – h diagram and calculate the following. a. Refrigeration Effect. b. Refrigerant mass flow rate, at a plant capacity of 196 kW. c. Power input into the compressor. d. Coefficient of performance of...

The intial conditions for an air-standard Otto cycle operating with a compresssion ratio of 8:1 are...

The intial conditions for an air-standard Otto cycle operating with a compresssion ratio of 8:1 are 14.7 psia and 60degF. At the beginning of the compression stroke, the cylinder volume of 270 in^3 and 9 Btu of heat are added to the gas during the constant-volume heating process. Calculate the thermal efficiency and the mean effective pressure of the cycle.

Design a system that shows a simplified automatic car wash system with the following operating conditions:...

Design a system that shows a simplified automatic car wash system with the following operating conditions: - Water level needs to be maintained at water level (> Lower limit and < Upper limit ) at all times to ensure the water pressure is sufficient for the wash cycle. - 2 Possible errors: - Water level exceeds upper limit or water level falls below lower limit - Car move away while washing process is ongoing - System shall stop if the...

A combined cycle power system uses a simple gas-turbine Brayton cycle in conjunction with a simple...

A combined cycle power system uses a simple gas-turbine Brayton cycle in conjunction with a simple Rankine cycle to produce a total power of 100 MW. In such configuration, the exhaust stream from the gas turbine is used as the heat source for the steam power cycle in a heat exchanger as shown in the figure. The following data are known for the gas-turbine cycle. Atmospheric air enters the compressor at 100 kPa and 20oC, the compressor pressure ratio is...

An Otto Cycle has air operating as the working fluid. The air begins the compression process...

An Otto Cycle has air operating as the working fluid. The air begins the compression process at 90 kPa and 40oC. During the heat addition process, the maximum temperature of the air (T3) is 2000oC. The compression ratio of the cycle is 9.2. Treating this as a “Hot Air Standard Cycle”, determine the temperature and pressure at the end of each process, the net work per kg of air produced in the cycle, the thermal efficiency of the cycle, and...

In an air conditioning system, the inside and outside conditions of air are 25 °C DBT...

In an air conditioning system, the inside and outside conditions of air are 25 °C DBT and 50% RH, and 40 °C DBT and 27 °C WBT, respectively. The room sensible heat ratio is 0.8, while 50% of the room air is rejected to atmosphere and replaced with an equal quantity of fresh air before entering the air conditioning apparatus. If the fresh air added is 100 m3 /min and the air density is 1.2 kg/ m3 with zero air...

(a) The air conditioning unit of a car is operating on a summer day when the...

(a) The air conditioning unit of a car is operating on a summer day when the temperature is 37°C. It cools the air to 6°C using 3kW of power output. The A/C has a COP of 4. Find the mass flow rate of the cold air that the A/C unit can provide on that particular day. (15 points) (b) A building freezer that is used to freeze vegetables requires 40 tons of refrigeration to keep the food frozen. The temperature...

Betty's Bagels has a cash cycle of 15 days, an operating cycle of 32 days, and...

Betty's Bagels has a cash cycle of 15 days, an operating cycle of 32 days, and an inventory period of 1.5 days. The company reported cost of goods sold in the amount of $102,000, and credit sales were $206,000. What is the company's average balance in accounts payable? Select one: a. $18,414.36 b. $4,843.84 c. $4,750.65 d. $21,918.00 e. $9,594.52

Thermodynamic In a piston-cylinder air at 100 kPa and 15°C undergoes the following cycle. First, it...

Thermodynamic In a piston-cylinder air at 100 kPa and 15°C undergoes the following cycle. First, it is compressed isentropically to a compression ratio of 20. Then 1800 kJ/kg of heat is transferred to the air at constant pressure. Afterwards the air expands isentropically. In the last step, heat is removed at constant volume until the air reaches its original state. Assuming air behaves as an ideal gas and with Cp and Cv independent of temperature, determine the: (a) pressure and...

Question