Apply Your Knowledge |
| 2.8 For this home heating system, identify the objectives that should be achieved by a control system. |
Operating Conditions |
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Safety | |
| Environmental Protection | |
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| Equipment | |
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| Smooth Operation | |
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| Product Quality | |
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| Profit | |
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| Monitoring | |
| 2.9 Given the following histogram, how close can the average temperature be to the maximum temperature limit of 420 K. You can assume that the variation does not change. |
Operating Conditions |
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| 2.10 Given a CSTR with the reaction below, what would be the best operating temperature to maximize the production of B? |
Operating Conditions |
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Very High Operating Temperature |
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 Where E is the activation energy |
| Intermediate Operating Temperature |
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| Very Low Operating Temperature |
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| 2.11 Answer the following questions. |
Benefits of Low Variability |
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i | Explain frequency distribution (histogram).
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ii
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Given plant data on a variable, describe the steps you would perform in preparing a
frequency distribution.
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| iii | What is the value of the sum of the frequency values over all intervals? | |
| 2.12 Variation occurs in all factors of our everyday lives. From the examples below discuss which of the variability, if any, you would find acceptable. |
Benefits of Low Variability |
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| Variable | Variability #1 | Variability #2 | Period of Variation |
| Room Temperature | 21 ± 2°C | 21 ± 7°C | 1 hour | |
| Velocity of an Automobile on the Highway | 103 ± 5 km/h | 100 ± 25 km/h | 5 min | |
| Hot Water in a Shower | 50 ± 12°C | 50 ± 2°C | 3 min | |
| Baking a Cake | 350 ± 10°F | 350 ± 15°F | 10 min | |
