Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Mechanical Engineering Expert

problem1) Given and Compute:

a) R-134a at T = 60°C and v = 0.072 m3/kg. Compute P and h.

b) Ammonia at P = 8 bar and v = 0.005 m3/kg. Compute T and u.

c) R-22 at T = -10°C and u = 200 kJ/kg. Compute P and v.

problem2) Given: R-134a is compressed with no heat transfer in piston-cylinder assembly from 30 lbf/in2, 20oF to 160 lbf/in2. Mass of refrigerant is 0.04 lbm. For refrigerant as system, W = -0.56 Btu. Kinetic and potential energy changes might be neglected.

Compute: final temperature (°F).

problem3) Given: Saturated water vapor is contained in the closed rigid tank. The water is cooled to a temperature of 110°C. At this temperature masses of saturated vapor and liquid are each 1000 kg.

Compute: The heat transfer for the process (kJ).

problem4) Given: 0.5 kg of R-22 is contained in the piston-cylinder assembly, initially saturated vapor at 5 bar. Refrigerant undergoes the  process for which pressure-specific volume relationship is Pv = C to the final pressure of 20 bar. Kinetic and potential energy effects could be neglected.

Compute:

a) Work (kJ) and

b) heat transfer (kJ) for the process.

problem5) Given: A gallon of milk at 68°F is placed in a refrigerator. Energy is removed from milk at a constant rate of 0.08 Btu/s a the milk cools. Specific heat, cp,milk = 0.94 Btu/lbmoR and density, rmilk = 64 lbm/ft3.

Compute: How many minutes would it take for the milk to cool to 48°F? How many minutes to cool another 10°F to 38°F?

Mechanical Engineering, Engineering

  • Category:- Mechanical Engineering
  • Reference No.:- M93958

Have any Question? 


Related Questions in Mechanical Engineering

Now consider a second joint of the same material width and

Now consider a second joint of the same material, width and thickness as the joint in problem 4 above but eccentrically loaded. This time, however, the line of action of the external load is 0.563 in. removed from the ce ...

A room has design conditions of78 f db and 50 rh and a rscl

A room has design conditions of78 F DB and 50% RH and a RSCL = 18,000 BTUlhr and RLCL = 8000 BTUlhr. An air conditioning unit supplies 900 CFM of air to the room at 58 F DB and 56 F WB. Will the unit maintain the room de ...

Q1 a list three classical methods of optimization in

Q1) a) List three classical methods of optimization in engineering design. b) Describe the type of finite elements used to solve 3 dimensional problems in solid mechanics. Supply examples of the application. c) Describe ...

Use eqn 135 to find expressions for the rate of change of

Use eqn 1.35 to find expressions for the rate of change of the expectation values of position and momentum of a harmonic oscillator; solve the pair of differential equations, and show that the expectation values change i ...

1 write down the equations for the reverse active mode by

1. Write down the equations for the reverse active mode by inspection without doing any algebra. 2. Are there any currents flowing in the cutoff mode? What is their magnitude if there are? 3. Obtain the saturation voltag ...

The ground state 1s1 h atom has two hyperfine states f 0

The ground state 1s1 H atom has two hyperfine states, F = 0 and F = 1, which correspond to different relative orientations of the nuclear spin and electron spin. The transition between these two states has a wavelength o ...

For the allen wrench of problem 715 what is the deflection

For the allen wrench of Problem 7.15, what is the deflection of the tip of the wrench when the maximum load of 60 N is applied, just before the bolt loosens? Problem 7.15: The maximum force applied to the tip of the alle ...

A beam with a rectangular cross section has dimensions as

A beam with a rectangular cross section has dimensions, as defined in Fig. 8.13, of b = 40and t = 10 mm. The beam is made of 7475-T7351 aluminum and is subjected to a bendingmoment of M = 900 N·m. (a) If a through-thickn ...

1 in more than one paragraph but less than a page discuss

1. In more than one paragraph but less than a page, discuss some of the failure modes experienced in the collapse of the World Trade Center and how they might have been prevented. 2. A truss ABC supports a load W at join ...

Define the endurance limit of a bolt which is greater the

Define the endurance limit of a bolt ? Which is greater, the static yield strength or the endurance limit of the bolt? When will an increase in preload increase fatigue life? When will an increase in preload decrease fat ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro