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Evaporative Condenser Power |
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Applicability |
Direct expansion systems with an evaporatively cooled condenser |
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Definition |
The power of the evaporative precooling unit. This includes any pump(s) and/or fans that are part of the precooling unit. |
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Units |
Watts |
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Input Restrictions |
As designed |
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Baseline Rules |
Not applicable |
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Evaporative Condenser Effectiveness |
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|---|---|---|---|---|---|---|---|---|---|
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Applicability |
Direct expansion systems with an evaporatively cooled condenser |
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Definition |
The effectiveness of the evaporative precooling unit for a condenser. Effectiveness is defined as follows: (Equation 3.7.5.3-4) $$DirectEFF=\frac{T_{db}-T_{direct}}{T_{db}-T_{wb}}$$ Where
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Units |
Ratio |
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Input Restrictions |
As designed |
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Baseline Rules |
Not applicable |
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Evaporative Condenser Operation Range |
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|---|---|
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Applicability |
Direct expansion systems with an evaporative cooled condenser. |
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Definition |
The temperature range within which the evaporative condenser operates. Two values are provided: Tmaximum The threshold outside air dry-bulb temperature below which evaporative condenser operates. Tminimum The threshold outside air dry-bulb temperature above which evaporative condenser operates. |
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Units |
Degrees Fahrenheit (°F) |
|
Input Restrictions |
As designed |
|
Baseline Rules |
Not applicable |
|
Evaporative Condenser Power |
|
|
Applicability |
DX systems with an evaporatively cooled condenser |
|
Definition |
The power of the evaporative precooling unit. This includes any pump(s) and/or fans that are part of the precooling unit. |
|
Units |
Watts |
|
Input Restrictions |
As designed |
|
Baseline Building |
Not applicable |
|
Evaporative Condenser Effectiveness |
|||
|
Applicability |
DX systems with an evaporatively cooled condenser |
||
|
Definition |
The effectiveness of the evaporative precooling unit for a condenser. Effectiveness is defined as follows:
Where: DirectEFF = The direct stage effectiveness Tdb = The outside air dry-bulb temperature Twb = The outside air wet-bulb temperature Tdirect = The direct stage leaving dry-bulb temperature (at the condenser inlet) |
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|
Units |
Ratio |
||
|
Input Restrictions |
As designed |
||
|
Baseline Building |
Not applicable |
||
|
Evaporative Condenser Operation Range |
|
|
Applicability |
DX systems with an evaporatively cooled condenser |
|
Definition |
The temperature range within which the evaporative condenser operates. Two values are provided: Tmaximum = The threshold outside air dry-bulb temperature below which evaporative condenser operates. Tminimum = The threshold outside air dry-bulb temperature above which evaporative condenser operates. |
|
Units |
Degrees Fahrenheit (°F) |
|
Input Restrictions |
As designed |
|
Baseline Building |
Not applicable |