FUND OF ENG THERMODYN(LLF)+WILEYPLUS
9th Edition
ISBN: 9781119391777
Author: MORAN
Publisher: WILEY
expand_more
expand_more
format_list_bulleted
Question
error_outline
This textbook solution is under construction.
Students have asked these similar questions
1. An engine rejects 200kW when running at a thermal efficiency of 22%. The calorific value of the fuel used is
42MJ/kg. Determine
(i)
the heat received by the engine;
(ii)
the power output in kW, and
(iii)
the mass of fuel used/h.
5. A fluid at 700 kPaa, with a specific volume of
0.25 m3/kg and a velocity of 175 m/s, enters a
device. Heat loss from the device by radiation
is 23 kJ/kg. The work done by the fluid is 465
kJ/kg. The fluid exits at 136 kPaa, 0.94 m3/kg
and 335 m/s. Determine the change in internal
energy, in kJ/kg. (answer in 1 decimal place)
A silicon chip measuring 5 mm on a
side and I mm in thickness is
embedded in a ceramic substrate. At
steady state, the chip has an electrical
power input of 0.425 W. The top surface
of the chip is exposed to a coolant
whose temperature is 29°C. The heat
transfer coefficient for convection
between the chip and the coolant is 0.18
kw/m2 K. If heat transfer by conduction
between the chip and the substrate is
negligible, determine the surface
temperature of the chip, in °R.
Select one:
O a. 714
O b. 353
O c. 396
O d. 635
Knowledge Booster
Similar questions
- By removing energy by heat transfer from a room, a window air conditioner maintains the room at 20°C on a day when the outside temperature is 28°C.(a) Determine, in kW per kW of cooling, the minimum theoretical power required by the air conditioner.(b) To achieve required rates of heat transfer with practical sized units, air conditioners typically receive energy by heat transfer at a temperature below that of the room being cooled and discharge energy by heat transfer at a temperature above that of the surroundings. Consider the effect of this by determining the minimum theoretical power, in kW per kW of cooling, required when TC = 16°C and TH = 32°C, and determine the ratio of the power for part (b) to the power for part (a).arrow_forwardThe following processes occur in a reversible thermodynamic cycle: 1-2: 0.2 kg heating at constant pressure 1.05 bar at specific volume 0.1 m3/kg and work done -515 J. 2-3: Isothermal compression to 4.2 bar. 3-4: Expansion according to law pv1.7= constant. 4-1: heating at constant volume back to the initial conditions. Calculate the work done for the isothermal process in J.arrow_forwardThe following processes occur in a reversible thermodynamic cycle: 1-2: 0.2 kg heating at constant pressure 1.05 bar at specific volume 0.1 m3/kg and work done -515 J. 2-3: Isothermal compression to 4.2 bar. 3-4: Expansion according to law pv1.7= constant. 4-1: heating at constant volume back to the initial conditions. Calculate the specific work done for process 1-2 in J/kg.arrow_forward
- During the execution of a nonflow process by a system, the work per degree temperature increase is dW/dt= 85 ft-lb℉, and the internal energy may be expressed as U=15.5+0.75t ft-lb, a function of the temperature ℉. Determine the amount of heat if the temperature changes from 7C℉ ?? 295℉ in Btu.arrow_forwardTwo kg of refrigerant R134a, initially at P₁ = 1 MPa, u₁ = 312.70 kJ/kg, is contained within a well-sealed copper tank. A paddle wheel is fitted into the tank to transfer energy to the refrigerant at constant rate of 0.1 kW. The refrigerant loses heat to its surroundings at a rate K-t2, in kW, where K is a constant, in kW per minute squared, and t is time, in minutes. After 10 minutes of stirring, the refrigerant is at p2 = 0.6 MPa and u₂ = 231.05 kJ/kg. No overall changes in kinetic and potential energy occur. (a) For the refrigerant, determine the work and heat transfer, each in kJ. (b) Determine the value of the constant K appearing in the given heat transfer relation, in kW/min².arrow_forwardThe following processes occur in a reversible thermodynamic cycle: 1-2: 0.2 kg heating at constant pressure 1.05 bar at specific volume 0.1 m3/kg and work done -515 J. 2-3: Isothermal compression to 4.2 bar. 3-4: Expansion according to law pv1.7= constant. 4-1: heating at constant volume back to the initial conditions. Calculate the work done for the constant volume heating process?arrow_forward
- A divider separates 1 lb mass of carbon monoxide (CO) from a thermal reservoir at 150o F. the carbon monoxide, initially at 60o F and 150 lbf/in2, expands isothermally to a final pressure of 10 lbf/in2 while receiving heat transfer through the divider from the reservoir. The carbon monoxide can be modeled as an ideal gas. (a) For the carbon monoxide as the system, evaluate the work and heat transfer, each in Btu and the amount of entropy produced, in Btu/oR. (b) Evaluate the entropy production, in Btu/oR, for an enlarged system that includesthe carbon monoxide and the divider, assuming the state of the divider remains unchanged. Compare with the entropy production of part (a) and comment on the difference.arrow_forwardI need some help in how to solve this problem. Any help will be appreciated. Thanksarrow_forwardTwo kilograms of air within a piston–cylinder assembly executes a Carnot power cycle with maximum and minimum temperatures of 700 K and 300 K, respectively. The heat transfer to the air during the isothermal expansion is 60 kJ. At the end of the isothermal expansion the volume is 0.4 m3. Assume the ideal gas model for the air. Determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kJ.arrow_forward
- The following processes occur in a reversible thermodynamic cycle: 1-2: 0.2 kg heating at constant pressure 1.05 bar at specific volume 0.1 m3/kg and work done -515 J. 2-3: Isothermal compression to 4.2 bar. 3-4: Expansion according to law pv1.7= constant. 4-1: heating at constant volume back to the initial conditions. Calculate the net work done in joules?arrow_forwardThe following processes occur in a reversible thermodynamic cycle: 1-2: 0.2 kg heating at constant pressure 1.05 bar at specific volume 0.1 m³/kg and work done -515 J. 2-3: Isothermal compression to 4.2 bar. 3-4: Expansion according to law pv1.7= constant. 4-1: heating at constant volume back to the initial conditions. Calculate the specific volume at 3 in m3/kg to 2 decimal places.arrow_forwardTwo pounds of carbon dioxide (CO₂) as an ideal gas executes a Carnot power cycle while operating between thermal reservoirs at 470 and 100°F. The pressures at the initial and final states of the isothermal expansion are 400 and 200 lb/in², respectively. The specific heat ratio is k-1.24. Determine the thermal efficiency, the work for the isothermal expansion, in Btu, and the work for the adiabatic expansion, in Btu. Step 1 Your answer is correct. Determine the thermal efficiency. 7= 39.798 Hint Step 2 % * Your answer is incorrect. Determine the work during the isothermal expansion, in Btu. W23 29.971 Btu Attempts: 2 of 4 usedarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University Press
Mechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSON
Thermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEY
Mechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage Learning
Engineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY