My device is an AIR COMPRESSOR Choose the working fluid (substance) for your model device Choose...

My device is an AIR COMPRESSOR

Choose the working fluid (substance) for your model device

Choose the inlet substance conditions such as temperature, pressure, velocity, mass flow rate or volume flow rate, quality, etc

Choose the outlet substance conditions based on the available information, or design the outlet conditions based on your research.

DRAW the system you are analyzing, including the SYSTEM BOUNDARY,

Show ALL INTERACTIONS between the system and surroundings on your drawing

Write the Conservation of mass equation as it applies TO YOUR SYSTEM

Write the Conservation of Energy equation as it applies TO YOUR SYSTEM

List all the assumptions and idealizations for the process

Calculate the thermo efficiency of the device. Be sure clearly shows equations, calculation process, intermediate answers/results,and final results. Units are critically important in all calculations.

Expert Solution

samet mamat answered 1 year ago

An ideal refrigeration cycle utilizes R-134a as a working fluid. If the fluid enters the compressor...

An ideal refrigeration cycle utilizes R-134a as a working fluid. If the fluid enters the compressor as saturated vapor at 6 C and enters a throttling valve as a saturated liquid at 1.2MPa. Assuming the mass flow rate of fluid is 1 kg/sec. 1. The heat received by the fluid (kJ) is 2. The heat received by the surroundings (kJ) is 3. The power input to the compressor (kJ) is 4. The coefficient of performance 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...

A refrigeration system contains an adiabatic compressor with Refrigerant-134a as working fluid. Inlet conditions (state 1)...

A refrigeration system contains an adiabatic compressor with Refrigerant-134a as working fluid. Inlet conditions (state 1) are 140 kPa and -100C and the exit state is 1.6 MPa and 800C (state 2). The changes in KE and PE are negligible. Determine (a) actual exit specific enthalpy in kJ/kg, (b) exit specific isentropic entropy in kJ/lg.K and (c) efficiency of the compressor in %.

A Carnot engine uses air as the working substance, receives heat at a temperature of 315oC,...

A Carnot engine uses air as the working substance, receives heat at a temperature of 315oC, and rejects it at 65oC. The maximum possible cycle pressure is 6.0MPa and the minimum volume is 0.95 liters. When heat is added, the volume increases by 250%. Determine the pressure and volume at each state in the cycle.

An ideal diesel engine uses air as the working fluid and operates with a thermal efficiency...

An ideal diesel engine uses air as the working fluid and operates with a thermal efficiency ?th =0.5 with a rate of heat addition Qin=120 kW. The temperature at the beginning and the end of the addition heat (combustion) are respectively: T2=900 K and T3=2100 K. Assume constant specific heats (Cp and Cv). The air properties at a room temperature T1=293.0 K are: Cp=1.005 kJ/kg.K, Cv=0.718KJ/kg.K, the gas constant of air is R=0.287 kJ/kg.K and the ratio of specific heats...

An ideal Otto cycle uses air as the working fluid; its state at the beginning of...

An ideal Otto cycle uses air as the working fluid; its state at the beginning of the compression is 120 psia and 60°F, its temperature at the end of the combustion is 1500°F, and its compression ratio is 9. Use constant specific heats at room temperature. Determine the rate of heat addition and rejection for this ideal Otto cycle when it produces 120 hp. The properties of air at room temperature are R = 0.3704 psia·ft3/lbm·R, cp = 0.240 Btu/lbm·R,...

a simple ideal Brayton cycle with air as the working fluid has a pressure ratio of...

a simple ideal Brayton cycle with air as the working fluid has a pressure ratio of 10. The air enters the compressor at 520 R and the turbine at 2000 R. Accounting for the variation of specific heats with temperature, determine (a) the ait temperature at the compressor exit, (b) the back work ratio, and (c) the thermal efficiency.

Consider a simple Brayton cycle using air as the working fluid with properties assumed constant and...

Consider a simple Brayton cycle using air as the working fluid with properties assumed constant and evaluated at room temperature (300 K). Conditions at the compressor inlet are T1 = 25°C and P1 = 200 kPa. The pressure ratio is 11 and maximum cycle temperature is 750°C. Answer the following (a) Compute the back?work ratio and cycle efficiency assuming both the turbine and compressor are isentropic (b) Compute the same quantities assuming only the turbine is isentropic while the compressor...

An air conditioner using R134a as the working fluid operates on an ideal vapour compression system...

An air conditioner using R134a as the working fluid operates on an ideal vapour compression system between 0.3 and 0.8 MPa. If the specified capacity for air conditioning is 20 kW. What would be its capacity for food freezing for which the evaporator temperature -20oC. Show the cycle on a PH diagram and explain the effect of the changes to the compressor and condenser respectively.

A gas-turbine power plant operates on the simple Brayton cycle with air as the working fluid...

A gas-turbine power plant operates on the simple Brayton cycle with air as the working fluid and delivers 32 MW of power. The minimum and maximum temperatures in the cycle are 310 and 900 K, and the pressure of air at the compressor exit is 8 times the value at the compressor inlet. Assuming an isentropic efficiency of 80% for the compressor and 86% for the turbine, determine the mass flow rate of air through the cycle. Account for the...

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