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Data Description
| Data | Unit | Description | ||
| Set | Item | Type | Native | |
| Equipment Properties | Condensate Temperature | Temperature | F | The temperature of the condensate stream. The default is the saturated temperature at the Condensate Pressure. Ignored if the specified temperature is higher than the condensing temperature. |
| Condensate Pressure | Pressure | psia | The pressure of the condensate stream. The default is the inlet pressure. | |
| Hot Water Temperature | Temperature | F | The outlet temperature for the coolant. | |
| Vapor Condensed | Fraction or Percent | Fraction | Fraction of inlet vapor that is condensed. | |
| Heat Transfer Efficiency |
Fraction or Percent | Fraction | The fraction of the heat which can be taken by the coolant. | |
| Surface Area | Area | ft2 | Surface area of condenser. | |
| Output Data | Heat Transfer Coefficient | Heat Trans Coef | BTU/hr/F/ft2 | Heat transfer coefficient, calculated from the heat transferred, and the specified surface area. |
| Heat Duty | Energy Flow | BTU/hr | Heat picked up by the cooling water. | |
| Condensing Temperature | Temperature | F | The temperature at which the input "Vapor fraction condensed" can be satisfied. Determined from the VLE data. | |
Equipment Properties
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Example of using equipment
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Method&Equations
If the condensate pressure is not specified it is set to the inlet vapor pressure.
The condensate is set to the temperature specified (if it is lower than the condensing temperature). If the temperature is not specified, the condensate is set to the saturated temperature.
The energy available for transfer to the cold inlet stream is calculated as:
Q = FI1 * HI1 - FO1 * HO1 - FO2 * HO2
where
Q - energy available for transfer
FI1- the flow in the inlet vapor stream
HI1- the enthalpy of the inlet vapor stream
FO1 - the flow in the outlet vapor stream
HO1- the enthalpy of the outlet vapor stream
FO2 - the flow in the outlet condensate stream
HO2 - the enthalpy of the outlet condensate stream
The outlet hot water enthalpy is then:
HO3 = (FI2 * HI2 + Q) / FO3
where:
HO3 is the enthalpy of the outlet hot water stream
FI2 is the flow in the inlet cold water stream
HI2 is the enthalpy of the inlet cold water stream
FO3 is the flow in the outlet hot water stream
Warnings
No cold water entering; defaults used!
No condensed fraction specified!
Hot water temperature not specified! The condensate temperature will be used!
Hot water outlet temperature exceeds inlet range!
Errors
Specified condensate temperature lower than the coolant inlet temperature!
Input hot water temperature lower than cold water temperature!