Clarification | of the actual design | and capacity | Condenser

The condenser is a heat exchanger type of contact is not directly aimed at changing the steam from the turbine into the water so it can be re-circulated by the cooling method derived from seawater that is pumped by the CWP (circulating Water Pump).
Expenses received by the condenser can be calculated by the following formula:
P = Pg (HR/3600) - (104/ηm ηg)
where,
P = Load Condensor, kW
Pg = Electrical output, kW
HR = heat rate, kJ / kWh
ηm = Mechanical efficiency turbine-generaztor (approximately 99.5%)
ηg = Generator electrical efficiency (about 99%)
While the heat balance on the condenser can be calculated using the formula
Qcw = P / (cp (θ1 - θ2)
where,
Qcw = flow of cooling water, kg / s
P = load condenser, kW
Cp = specific heat, kJ / kg K
θ1 = temperature of cooling water into the condenser, C
θ2 = temperature of condenser cooling water exit, ° C

To clarify the design of the cooling capacity is needed, we must first know the condenser load (the energy that goes into the condenser) with a simple calculation using the formula: P = Pg (HR/3600) - (104/ηm ηg).
Turbine heat rate (HR) performance of data taken from test unit 2 of 1980 kcal / kWh (Appendix 1) at 300 MW load.
Pg = 300 MW
HR = 1980 kcal / kWh = 8290 kJ / kWh
P = 300 MW ((8290 kJ / kWh) / 3600) - (104 / (99 x 98))
P = 381.62 MW
Condenser load of 381.62 MW obtained. Clarification was required cooling capacity can be calculated using the heat balance in the condenser by the formula:
Qcw = P / (cp (θ1 - θ2)
Clarification of the cooling capacity required by the operational one CWP
θ1 = 26 ° C (temperature into the condenser with a pump CWP)
θ2 = 44 ° C (the temperature of the condenser with one pump out CWP)
cp = 4.08 J / kg K
Qcw = 381.62 MW / ((4:08 J / kg K) (44 oC - 26 oC)
Qcw = 5190 kg / s = 5.06 m3 / s
The actual flow flowing at 5:06 m3 / s flow capacity of the pump close to CWP. This proves that with a CWP able to load the actual unit of 300 MW but the consequences condenser outlet temperature of 44 oC.

Clarification of the required cooling capacity is based on two operational CWP (design)
Calculations can be performed using data from the design of the condenser inlet temperature and outlet temperature of the condenser.
θ1 = 26 ° C (the temperature of the condenser with two pumps into CWP)
θ2 = 34 ° C (the temperature of the condenser with two pumps out CWP)
Qcw = 381.62 MW / ((4:08 J / kg K) (34 oC - 26 oC)
Qcw = 11 678 kg / s = 11:39 m3 / s
Flow calculations for 11:39 m3 / s near the pump flow capacity of 2 CWP. So it is true CWP design 2 x 50% with the condenser inlet temperature of 26 ° C, the condenser outlet temperature is 34 oC.

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