Research on Performance Optimization of Nuclear Power System
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Table 2. Calculation of modeling parameters of two-loop preheating system
Equipment
Parameter
Design value
Calculated values
Error/%
Steam turbine
Entry pressure/Mpa 3
3
0
Export pressure/Mpa 0.016
0.015
6.25
Entry
temperature/°C
286.85
286.83
0.01
Export
temperature/°C
56.59
53.97
4.63
Gas
38.1
38.1
0
Condenser
Entry pressure/Mpa 0.016
0.015
6.25
Export pressure/Mpa 0.014
0.015
7.14
Entry
temperature/°C
56.59
53.97
4.63
Export
temperature/°C
52.85
53.97
2.12
Gas
43.1
43.1
0
Feed pump
Entry pressure/Mpa 1
1
0
Export pressure/Mpa 3.7
3
18.9
Preheater
Entry
temperature/°C
52.85
54.09
2.35
Export
temperature/°C
69.45
70.68
1.64
Extraction Entry
temperature/°C
–
286.83
–
Extraction Export
temperature/°C
–
233.86
–
MATLA utilization B the second loop preheating system is modeled, the following
assumptions are made, and the results are shown in Table 2.
The flow difference between steam turbine and condenser is the extraction volume,
which accounts for 11.6% of the total steam volume. The extraction point is the high
temperature and high pressure working fluid at the outlet of steam generator;
The pressure in the condenser is constant and the outlet is saturated water;
Heat exchanger efficiency is 100, steam feed pump work is ignored.
2.3 Type of Secondary Circuit Equipment
Besides the cycle efficiency, the volume of the equipment and system should be taken
into account in the optimization calculation of the second loop. As a result, on the
premise of determining the operating conditions, the pump and condenser equipment
can be selected and according to the parameters of common civil equipment according