Heating Ventilating and Air Conditioning: Analysis and Design
6th Edition
ISBN: 9780471470151
Author: Faye C. McQuiston, Jeffrey D. Spitler, Jerald D. Parker
Publisher: Wiley, John & Sons, Incorporated
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Textbook Question
Chapter 4, Problem 4.3P
Select comfortable summer design conditions (dry bulb and relative humidity) for a machine shop where people in light clothing
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As a building designer, you have been asked to analyze and select the bestwindow frame type alternative—either aluminum or steel. The project is located in a remotearea, and the nearest industrial area hosting steel and aluminum windows framesmanufacturers is 250 km away. All project windows are identical, and the circumference ofthe window frame is 6.2 meter. A crew of two labors is required to manufacture one steelframe. It takes 2.5 hours to manufacture the first window every day, and the learning rate is0.9. The number of production units is per day is limited to 8. The weight of steel is 12 kg permeter, and the weight of aluminum is 4.5 kg per meter. The cost of steel is 0.4 OMR per kgand the cost of aluminum 1.1 OMR per kg. If 45 windows frames are required for the project,the crew cost is 3 OMR per hour for steel frames and 3.6 for aluminum frames, and thetransportation, price is 0.01 OMR per kg per 50 km, which alternative would you select?
As a technologist, you are given the
following design task:
In a manufacturing environment, the final
product needs to be packaged and sealed.
After the product is placed inside the plastic
bag, a hot pressing die is to be used to seal the
plastic bag by application of heat and pressure.
The operation should be as follow:
By pressing a pushbutton switch, the
heating rail is advanced and the packaging
material is heated along the adhesive strip.
After the adhesion pressure has been reached, the heating rail must return to its start
position
The design specification includes the following:
Pressure dependent reversal with monitoring of the end position by means of magnetic
proximity switches.
Include safety measures, a green light to show when the system is ready, a red light when
system is in operation, a warning sound when the heating rail is moving.
1. Draw your pneumatic circuit design for this application.
2. Draw the electric circuit diagram for your design.
Chapter 4 Solutions
Heating Ventilating and Air Conditioning: Analysis and Design
Ch. 4 - Using Fig. 4-1, draw a conclusion about the...Ch. 4 - Using Fig. 4-1, draw a conclusion about the...Ch. 4 - Select comfortable summer design conditions (dry...Ch. 4 - It is desired to use a space as a large classroom...Ch. 4 - An indoor tennis facility finds that it has...Ch. 4 - Work Problem 4-5 for an average air speed at court...Ch. 4 - In an occupied space the mean air velocity is...Ch. 4 - An occupied space is being held at 76 F (24 C) and...Ch. 4 - What do you think is the best thermostat setting...Ch. 4 - With the air conditioning running and the...
Ch. 4 - Discuss how an emergency government mandate to set...Ch. 4 - In the heating seasons the heat loss from a...Ch. 4 - Air motion can be good or bad, depending on the...Ch. 4 - To save energy in large, chilled water systems,...Ch. 4 - Overhead fans (Casablanca fans) are often reversed...Ch. 4 - A school classroom is designed for 30 people. (a)...Ch. 4 - Carbon dioxide is being generated in an occupied...Ch. 4 - Each person in a room is assumed to be producing...Ch. 4 - An air-handling system must handle 2000 cfm with a...Ch. 4 - Prob. 4.20PCh. 4 - How many filter modules will be required using the...Ch. 4 - Work Problem 4-21 assuming that the filter is a...Ch. 4 - The M-200, 0.60.60.2 filters of Table 4-3 are to...Ch. 4 - Investigate the feasibility of using 100 percent...Ch. 4 - Work Problem 4-24 but replace the 100 percent...Ch. 4 - Using M-15 filter media and the requirement of 60...Ch. 4 - A filter system is available that will filter out...Ch. 4 - A maximum of 10 smokers are anticipated in a smong...Ch. 4 - Solve Ex. 4-4 assuming that the filter is in...Ch. 4 - Solve Problem 4-28 assuming that the filter is in...Ch. 4 - Fora 3000-ft3 combination and exercise operation,...Ch. 4 - A classroom with a capacity of 225 people is...
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