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12 Cards in this Set
- Front
- Back
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How many ventilation fans are provided for each unit to transfer air from outside the building to inside? |
15 fans to meet the demand of the forced draft fans. |
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What percentage of ventilation fan air is provided for the east and west side of the the plant and where? |
• 75% - East side on three levels; the ground, mezzanine and turbine floor. • 25% - West side to the ground floor of the boiler. |
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What is the high temperature hot water (HTHW) system? |
Used to supply heat to the air pumped into the building by the ventilation fans during the winter months to eliminate equipment freezing problems and create a reasonable working atmosphere. |
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Why do we use a HTHW system instead of a steam heating system? |
1. It reduces the size of the piping. 2. Eliminates the necessity for pitching piping for drainage. 3. Eliminates the use of strainers and traps. 4. Reduces the chance of freezing and other maintenance problems. |
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The ventilation fans are operated so that at least _____ % more air is supplied than required throughout the load range. |
10% |
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What is the purpose of the heating coils? |
To heat the cold air being drawn in from outside by the ventilation fans. |
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How many heating coils provide heat to fan intake chamber #1 (northeast)? |
28 coils |
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How many heating coils provide heat to fan intake chamber #2(southeast)? |
28 coils |
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How many heating coils provide heat to fan intake chamber #3 (northwest)? |
9 |
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How many heating coils provide heat to fan intake chamber #4 (southwest)? |
9 |
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The heating coils are suitable for operation to maximum conditions of _____ psi and _____ °F. |
• 200 psi • 400°F |
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What is the purpose of the HTHW heat exchanger? |
To use auxiliary steam to heat the water going to the heating coils. |
