0.5 kg of steam contained in piston -cylinder device as shown below undergoes expansion from state 1 to state 2. Initial specific internal energy of steam is 2709.9 kJkg The paddle wheel is a device tumed 6270 revolutions with an average of turning moment against the steam is 1955SN mm. A beating device supplies 80 kJ of energy to the steam. Meanwhile, The paddle wheel work and heat source together moves out 0.85 m diameter frictionless piston for a distance of 145 m against a constant pressure of 1.5bar. Determine the following Network of the system and state weather increase or decrease 1) Final internal energy of the steam 1) State and explain, the law of thermodynamics used to find final internal energy of the steam 0.5 kg ar Steam E paddle Piston U=2709.9 kJ/kg Q =80 kJ

0.5 kg of steam contained in piston -cylinder device as shown below undergoes expansion from state 1 to state 2. Initial specific internal energy of steam is 2709.9 kJkg The paddle wheel is a device tumed 6270 revolutions with an average of turning moment against the steam is 1955SN mm. A beating device supplies 80 kJ of energy to the steam. Meanwhile, The paddle wheel work and heat source together moves out 0.85 m diameter frictionless piston for a distance of 145 m against a constant pressure of 1.5bar. Determine the following Network of the system and state weather increase or decrease 1) Final internal energy of the steam 1) State and explain, the law of thermodynamics used to find final internal energy of the steam 0.5 kg ar Steam E paddle Piston U=2709.9 kJ/kg Q =80 kJ

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.39P: The tip of a soldering iron consists of a 0.6-cm- diameter copper rod, 7.6 cm long. If the tip must...

See similar textbooks

Similar questions

can we do energy balance using the equation of first law of thermodynamics if the system is open? Explain.
A 10 kg of steam is contained a piston-cylinder shown in the figure below, 95 kJ of heat is transferredto the steam causing it to expand from initial state where the specific internal energy is u1 = 2815kJ/kg to final state where u2 = 2670.4 kJ/kg. During the process, a 25 kJ of paddle wheel work is alsoadded to the steam. Assuming that there is no significant change in kinetic and potential energies,determine the work transferred by steam to the piston during the process, in kCal.
Explain the energy is recognized as heat transfer only as it crosses the system boundary?
8. A piston-cylinder arrangement contains 1 kg mass at 142.5 kPa. The volume is increasedfrom 1 m3to 3 m3. The approximate boundary work of the system isa. Cannot be find since some data is missingb. 285 kJc. 0 kJd. 0.285 kJ
3. An air compressor which operates at 900 rpm has a piston displacement of 4500cm3. Determine the mass flow rate of air at standard density considering that the volumetric efficiency is 77%. a. 314.57 kg/hr b. 324.35 kg/hr c. 137.54 kg/hr d. 224.53 kg/hr Please answer this immediately. Thank you!
A turbine operating under steady-flow condition receives steam at the following state: pressure,13.8bar; specific volume 0143 m3 /kg, and velocity 30m/s. The state of the steam leaving the turbine is as follow: pressure 0.35 bar, specific volume 4.37 m3/kg and velocity 90 m/s. The difference in elevation is negligible. Heat is rejected to the surrounding at the rate of 0.25 kW, the turbine develops 103kW of power and the rate of steam flow through the turbine is 0.5 kg/s. Calculate the change in internal energy of the steam
A thermodynamic system with 45 pounds of Neon simultaneously reject heat and receive paddle-work input. The fluid is stored in a vessel having an initial temperature of 450 deg F to a final temperature of 110 deg F. If the heat is five times the paddle work in constant pressure process, determine (a) the change in internal energy, (b) change in enthalpy, (c) change in entropy, (d) Heat, (e) Paddle work, and (f) Net work. Consider k = 1.667 and Cv = 0.15 BTU/lbm-R. (20 pts) Note: For this item, to minimize discrepancies all unit conversion must be done at the final answers only.
A heat engine receives a heat-transfer at the rate of 2 MW at a high temperature of 750 °C. The engine releases energy to its surrounding at 300 K and work is produced at a rate of 1200 kW. What are 1. The energy released to the ambient surroundings? 2. The efficiency of the engine?
An oil-transfer pump uses 1 kW of power in transferring 5 kg/s of oil through a 3-cm-diameter pipe. The changes in kinetic and potential energies are essentially zero, and the process is adiabatic. Additionally, there is no appreciable temperature change in the oil, which has a density of 1500 kg/m³. Determine the change in pressure from inlet to exit.
The thermal effiency of a general heat engine is 35 percent, and it produces 60 hp. At what rate is heat transferred to this engine, in kJ/s?
A refrigeration system in a cooling-section of a dairy plant is being designed to cool eggs (p= 67.4 lbm/ft3 and Cp= 0.80 Btu/lbm · °F) with an average mass of 0.14 lbm from an initial temperature of 90°F to a final average temperature of 50°F by air at 34°F at a rate of 10,000 eggs per hour. If the cooling-section is well-insulated, determine (a) the rate of heat removal from the eggs, in Btu/h, and (b) the required volume flow rate of air, in ft3/h, if the temperature rise of air is not to exceed 10°F. You can take the specific heat of air as 0.24 Btu/lbm.F.
The boiler of a steam generator has a total volume of 2 m3, and initially contained 1.5 m3 of water and 0.5 m3 of steam in balance at 1 kgf/cm2. The home is turned on and the water and steam from the boiler are heated. Somehow, the inlet and outlet valves of the boiler were left closed, and the safety valve will open when the pressure reaches 56 kgf/cm2. How much heat is transmitted to the water and steam in the boiler before the safety valve opens?