Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN: 9781337399128
Author: Russell E. Smith
Publisher: Cengage Learning
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Chapter 2, Problem 11RQ
What is current?
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determine the heat loss and heat transfer requirements for an air conditioningsystem in a storage room.
Steps:1. Collect Data: Review the Technical Specifications Document for details like storage roomdimensions, wall thickness, and materials. Use the ASHRAE CLIMATIC DESIGN CONDITIONS tocollect local data.2. Calculate Room Surface Area: Determine the total surface area of the storage room,accounting for walls and ceiling. Assume that the floor is well insulated and that heat transferwithin the floor is negligible.3. Assess Insulation: Evaluate the insulation thickness and material properties.4. Calculate Heat and Ventilation Loads (Heat Loss Calculations): In general, heat loadcalculations include several components, such as internal equipment, lighting, and heat gainsfrom external sources. For this project, identify and quantify the main heat loads affecting therefrigeration system, focusing specifically on:• Heat gains from the outside environment (through walls, doors, and ceiling)•…
A simply supported beam with a square cross section under two concentrated loads is shown in Figure 2. The beam has a roller support at the left end A and a pin support at the right end B. The material of the beam is considered to be Alloy Steel.
determine the reaction forces and plot the shear force and bending moment diagrams
25 mm
10 mm
250 mm
a
15 mm
250 mm
0.3 m
(300 mm)
A
n
65 kN 90 kN 65 kN
B
PROBLEM 6.11
For the beam and loading shown,
consider section n-n and determine (a)
the largest shearing stress in that section,
(b) the shearing stress at point a.
15 mm
0.6 m
0.6 m
0.6 m 0.6 m
Chapter 2 Solutions
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
Ch. 2 - All physical objects are composed of __________....Ch. 2 - What is an atom?Ch. 2 - Which of the following is a part of the atom? a....Ch. 2 - What is static electricity?Ch. 2 - Name three ways electricity can be produced.Ch. 2 - What part do protons and electrons play in the...Ch. 2 - Which of the following is the simplest atom that...Ch. 2 - What are the four most important characteristics...Ch. 2 - What is electromotive force?Ch. 2 - Electromotive force is commonly measured in _____....
Ch. 2 - What is current?Ch. 2 - How is current measured? a. amperes b. ohms c....Ch. 2 - What is resistance?Ch. 2 - How is resistance commonly measured? a. amperes b....Ch. 2 - What is electrical power?Ch. 2 - How is electrical power commonly measured? a....Ch. 2 - Where do electrons exist in an atom, and what is...Ch. 2 - True or False: All atoms tend to lose electrons.Ch. 2 - State the law of electric charges.Ch. 2 - What is a proton? Where does it normally exist in...Ch. 2 - Describe briefly the method a dry cell battery...Ch. 2 - What is a conductor?Ch. 2 - Which of the following is the best conductor? a....Ch. 2 - What is an insulator?Ch. 2 - Which of the following is the best insulator? a....Ch. 2 - Why do metals make the best conductors?Ch. 2 - How do electric utility companies charge customers...Ch. 2 - What is the meaning of SEER when used in...Ch. 2 - State Ohms law.Ch. 2 - True or False: Ohms law applies to all types of...Ch. 2 - What is the ampere draw of a 5000-watt electric...Ch. 2 - What is the resistance of the heating element of...Ch. 2 - What is the voltage of a small electric heater if...Ch. 2 - What is the Btu/hour output of an electric heater...Ch. 2 - What is the kilowatt output of an electric heater...
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- A 000 RA 1.8 m P W610 X 155 C B 2.7 m- RC PROBLEM 6.17 For the wide-flange beam with the loading shown, determine the largest load P that can be applied, knowing that the maximum normal stress is 165 MPa and the largest shearing stress using the approximation T = VIA web is 100 MPa.arrow_forwardPROBLEM 6.31 The built-up beam shown is made up by gluing together five planks. Knowing that the allowable average shearing stress in the glued joints is 400 kPa, determine the largest permissible vertical shear in the beam. 50 mm 100 mm 50 mm 125 50 125 mm mm mmarrow_forward32 mm 32 mm с b 32 mm 32 mm a PROBLEM 6.40 The extruded beam shown has a uniform wall thickness of 3 mm. Knowing that the vertical shear in the beam is 9 kN, determine the shearing stress at each of the five points indicated.arrow_forward
- PROBLEM 6.39 6.39 The vertical shear is 5.3 kN in a beam having the cross section shown. Determine (a) the distance d for which Ta Tb, (b) the corresponding shearing stress at points a and b. = 12 mm |d→←125. mm 200 mm 12 mm b d. 100 mmarrow_forward100 kN 100 kN In A In 500 m 250 m 500 m B ΤΟΠΟΙΟΣ 180 mm 20 mm b 38 mm a -200 mm $381 mm 20 mm PROBLEM 6.23 For the beam and loading shown in Problem 6.22, determine the largest shearing stress in section n-n. PROBLEM 6.22 For the beam and loading shown, consider section n-n and determine the shearing stress at (a) point a, (b) the shearing stress at point b. 20 mm→ karrow_forward100 kN In A n 100 kN 0.5 m 0.5 m 0.25 m 20 mm 180 mm b B a 000 20 mm- 38 mm 38 mm PROBLEM 6.21 For the beam and loading shown, consider section n-n and determine the shearing stress at (a) point a, (b) the shearing stress at point b. 20 mm -200 mmarrow_forward
- 450 mm In 600 mm. a 72 mm 72 mm 125 kN 72 mm 192 mm t = 6 mm PROBLEM 6.10 For the beam and loading shown, consider section n-n and determine (a) the largest shearing stress in that section, (b) the shearing stress at point a.arrow_forwardPROBLEM 6.38 = 6.38 The vertical shear is 5.3 kN in a beam having the cross section shown. Knowing that d 100 mm, determine the shearing stress (a) at point a, (b) at point b. 12 mm d→ 125 mm 200 mm 12 mm b 100 mmarrow_forward1. (6%) Please sketch the distribution of shear stresses in a rectangular beam and determine where the maximum shear stress occurs. !! C りarrow_forward
- 1. (15%) (a) Consider a narrow rectangular beam subjected to a shear force V. Determine where the maximum shearing stress will be occurred. (b) Give an example for which plane stress condition can be used (c) Fixed supports only prevent rotation. (True/False) (d) Roller supports only prevent translation in vertical direction. (True/False) (e) Ely"=-q (True/False)arrow_forwardA horizontal pipe network has a connection of three pipes of different diameters, where the flow in section 3 exits to the atmosphere. The following requirements are required: a) Outlet flow rate at point 3. b) Pressure at point 2. c) x and y components of the force the flow exerts on the connection. Continuity, momentum, and energy equationarrow_forwardThe expression "flush" comes from the fact that the first toilet tanks were quite high, and you literally had to flush the toilet to move the stopper and flush the water. If the water level inside the tank is 1.8 m high and the pipe diameter is 5 cm, determine the following: a) The velocity of the water entering the toilet. b) The force at the junction of the pipe and the toilet, which is required to prevent the pipe from coming out and spilling water onto the floor. (Continuity, momentum, and energy equation)arrow_forward
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