CN115662666A - Method and system for adjusting feed water temperature of two-loop system under variable load working condition - Google Patents
Method and system for adjusting feed water temperature of two-loop system under variable load working condition Download PDFInfo
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- CN115662666A CN115662666A CN202211372752.1A CN202211372752A CN115662666A CN 115662666 A CN115662666 A CN 115662666A CN 202211372752 A CN202211372752 A CN 202211372752A CN 115662666 A CN115662666 A CN 115662666A
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- Y02E30/00—Energy generation of nuclear origin
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Abstract
The invention discloses a method and a system for adjusting the feed water temperature of a two-loop system under a variable load working condition, and relates to the technical field of nuclear reactor thermal hydraulic system tests; based on the requirement of the reactor thermal hydraulic system test on feed water temperature control, a condenser is arranged at the upstream of a temperature adjusting water tank of a two-loop system, and the feed water temperature is adjusted by adjusting the primary side characteristic quantity and the secondary side characteristic quantity of the condenser under different steam load working conditions of the reactor thermal hydraulic system test; the temperature of condensed water cooled by steam is adjusted to be within a first target temperature range by changing the input flow of cooling water of the condenser, a temperature adjusting water tank is arranged at the downstream of the condenser, the temperature adjusting water tank further controls the temperature of the water in the temperature adjusting water tank to be within a second target temperature range, and the second target temperature range is located within the first target temperature range, so that system fluctuation is reduced by step adjustment.
Description
Technical Field
The invention relates to the technical field of nuclear reactor thermal hydraulic system tests, in particular to a method and a system for adjusting the feed water temperature of a two-loop system under a variable load working condition.
Background
The nuclear reactor thermohydraulic system test generally comprises the adjustment of a primary loop system and the adjustment of a secondary loop system. An important parameter in a two-loop of a nuclear reactor thermal hydraulic system test device is the feed water temperature, and the adjustment of the feed water temperature is an important link in the control process of the two loops. The temperature of the traditional two-loop water supply system can not be adjusted in real time in the transient experimental process of the thermotechnical hydraulic system test on the premise of maintaining the stability of the main parameters of the two loops, and for different steam load working conditions, the temperature of the condensed condenser is changed along with the change of the feed water flow of the two loops under the variable load working condition, so that the feed water temperature is required to be adjusted in time to maintain the stability of the system, and the feed water temperature is stabilized at T ref ±5℃。
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the temperature of the traditional two-loop water supply system can not be adjusted in real time in the experimental process of a thermotechnical hydraulic system on the premise of maintaining the stability of main parameters of the two loops, and under different steam load working conditions, because the change fluctuation of the water supply flow of the two loops is large under the variable load working condition, the water supply temperature after the condenser is condensed is changed, the water supply temperature needs to be adjusted in time, so that the water supply temperature is stabilized at Tref +/-5 ℃. The invention aims to provide a method and a system for adjusting the feed water temperature of a two-loop system under a variable load working condition based on the requirement of feed water temperature control in a reactor thermal hydraulic system test, so as to realize the adjustment of the feed water temperature under different steam load working conditions in the reactor thermal hydraulic system test.
The invention is realized by the following technical scheme:
the scheme provides a method for adjusting the feed water temperature of a two-loop system under the working condition of variable load, which comprises the following steps:
the method comprises the following steps: a temperature regulating water tank is arranged at the downstream of a condenser of the two-loop system and receives condensed water generated at the primary side of the condenser;
step two: collecting the characteristic quantity of the primary side of a steam input port of a condenser and the characteristic quantity of the secondary side of a cooling water input port of the condenser, and collecting the temperature of a condensate water output port of the condenser;
step three: and regulating the primary side characteristic quantity and the secondary side characteristic quantity to stabilize the temperature of a condenser condensate water outlet at a first target temperature.
The working principle of the scheme is as follows: the temperature of the traditional two-loop water supply system can not be adjusted in real time in the experimental process of a thermotechnical hydraulic system on the premise of maintaining the stability of main parameters of the two loops, and for different steam load working conditions, because the change fluctuation of the water supply flow of the two loops is large under the variable load working condition and the water supply temperature is changed, the water supply temperature needs to be adjusted in time to ensure that the water supply temperature is stabilized (T) ref 5 ℃ C. The invention provides a method and a system for adjusting the feed water temperature of a two-loop system under a variable load working condition based on the requirement of feed water temperature control in a reactor thermal hydraulic system test, so as to realize the adjustment of the feed water temperature under different steam load working conditions in the reactor thermal hydraulic system test. The water supply temperature adjusting method for the thermal hydraulic system test adjusts the temperature of condensed water cooled by steam in a first target temperature range (T) by changing the input flow of the condenser cooling water ref ±5℃)。
Further, the primary side characteristic quantity includes: the temperature of the condenser steam input port, the pressure of the condenser steam input port and the flow rate of the condenser steam input port;
the secondary side characteristic quantity comprises the flow of a condenser cooling water input port.
The further optimization scheme is that the method further comprises the following fourth step: regulating the temperature of the temperature regulating water tankAnd regulating the temperature in the water tank to be stabilized at a second target temperature. According to the scheme, the temperature adjusting water tank is arranged at the downstream of the condenser, and the temperature of the temperature adjusting water tank is further controlled within a second target temperature range (T) ref +/-2 ℃) and the scheme is used for the reactor transient thermal hydraulic system test, so that the feed water temperature of the reactor thermal hydraulic system test can be adjusted to be within a reference temperature value range under different working conditions.
In a further preferred embodiment, the second target temperature range is contained within the first target temperature range. The first target temperature range is T ref Plus or minus 5 ℃ and a second target temperature range of T ref ±2℃；T ref Is the reference temperature required by the two-loop system.
The further optimization scheme is that the third step comprises the following substeps:
s31, when the temperature of the condenser condensed water output port is not within a first target temperature range, the flow of the condenser steam input port is used as a driving quantity, the flow of the condenser cooling water input port is used as a driven quantity, the driving quantity is adjusted by a double-closed-loop ratio control method, the driven quantity changes along with the change of the driving quantity, and the temperature of the condenser condensed water output port is close to the first target temperature;
and S32, acquiring the temperature of the condensate water output port of the condenser in the feedback of S31, and adjusting the flow of the cooling water input port of the condenser to keep the temperature of the condensate water output port of the condenser stable.
The controlled variable for the condenser 1 is the outlet temperature of the vapour condensate and the control variable is the cooling water inlet flow. Factors influencing the outlet temperature of the steam condensate mainly include the inlet temperature of the condenser steam, the inlet flow of the condenser steam, the flow of the condenser cooling water, the inlet temperature of the condenser cooling water and the distribution of the heat transfer area of the condenser. In order to keep the outlet temperature of the condenser steam condensate at T ref And +/-5 ℃, taking the steam inlet flow of the condenser as a driving quantity and the inlet flow of cooling water of the condenser as a driven quantity, and based on a double closed-loop ratio control method, the driven quantity changes by tracking the change of the driving quantity to realize the accurate flow ratio of the driving quantity to the driven quantity. The cooling water inlet of the condenser is regulated in a small range through the temperature feedback of the steam condensate outlet of the condenserThe flow rate of the outlet is controlled, so that the aim of stabilizing the temperature of the outlet steam condensate is fulfilled.
This scheme is adjusting the temperature to the in-process of reference temperature, has set up two temperature ranges: the method comprises the following steps that a first target temperature range and a second target temperature range are obtained, the water temperature is modulated to be in a larger temperature range on the basis of a double-closed-loop ratio control method, and the flow of a cooling water inlet of a condenser is adjusted in a small range after the temperature of a steam condensate outlet of the condenser is fed back; finally, the temperature in the temperature adjusting water tank is stabilized at a second target temperature through the temperature adjusting water tank and is closer to the reference temperature; and the control is performed step by step to maintain the stability of the two-loop system under the variable load working condition.
This scheme still provides two return circuit system feedwater temperature governing system under the variable load operating mode, includes: the system comprises a condenser, a cooling water regulating valve group, a temperature regulating water tank, an acquisition module and measurement and control software;
the condenser inputs condensed water into the temperature adjusting water tank, the cooling water adjusting valve group is connected with a cooling water input port of the condenser, and the cooling water adjusting valve group is used for adjusting the flow of the cooling water input port of the condenser;
the collecting module is used for collecting the characteristic quantity of the primary side of the steam input port of the condenser and the characteristic quantity of the secondary side of the cooling water input port, and is also used for collecting the temperature of the condensate water output port of the condenser;
and the measurement and control software is used for adjusting the primary side characteristic quantity and the secondary side characteristic quantity to enable the temperature of the condenser condensate water output port to be stabilized at a first target temperature.
The temperature regulation water tank is a sealed pressure container, 3N electric heating elements are arranged at the bottom of the sealed pressure container, 2N electric heating elements are a direct-throw set, N electric heating elements are a regulation set, and the regulation and control module enables the temperature in the temperature regulation water tank to be stabilized within a second target temperature range through changing the power of the electric heating elements of the regulation set, wherein the second target temperature range is contained within the first target temperature range.
The further optimization scheme is that the condenser is a shell-and-tube type, the fluid in the shell is steam, and the fluid in the tube body is cooling water.
The cooling water regulating valve group comprises a main loop regulating valve and two parallel branch regulating valves, the main loop regulating valve is used for controlling the cooling water flowing to the branch regulating valves, and the two parallel branch regulating valves are used for regulating the cooling water input into the condenser.
The further optimization scheme is that the interior of the condenser is divided into 3 different heat transfer areas by arranging partition plates, wherein two heat transfer areas in the condenser are connected to a cooling water inlet, and the other heat transfer area 3 is connected to a cooling water outlet.
The heat exchanger adjusting branch is arranged behind the temperature adjusting water tank; the heat exchanger can further accurately adjust the temperature; the heat exchanger regulating branch comprises two parallel branches, wherein one branch comprises a heat exchanger and a flow regulating valve; the other branch can be a light pipe, and a flow regulating valve can also be installed. Most of the water flowing out of the temperature regulating water tank flows through the branch without the heat exchanger, and only a small part of the water flows through the branch with the heat exchanger. If the temperature of the water flowing out of the temperature adjusting water tank meets the experimental requirements or is lower than the experimental requirements, closing the flow adjusting valve on the branch of the heat exchanger; if the temperature of the water flowing out of the temperature regulating water tank is higher than the experimental requirement, the flow regulating valve on the heat exchanger branch is given an opening degree, so that a small part of the flow of the fluid flows through the heat exchanger branch, and the temperature is reduced. After mixing with the branch fluid without the heat exchanger, the temperature meets the experimental requirements.
According to the scheme, the steam inlet flow is used as a main momentum, the inlet flow of cooling water is used as a driven momentum, a double closed-loop ratio control method is adopted, the driven momentum changes along with the change of the main momentum, the accurate flow ratio of the main momentum and the driven momentum is realized, and the cooling water inlet flow is adjusted in a small range through the feedback of the outlet temperature of the steam condensate, so that the aim of stabilizing the temperature of the outlet steam condensate is fulfilled; the invention has the advantages of simple structure, convenient operation and the like, and can fully meet the requirement of the temperature control of the feed water in the test of the reactor thermal hydraulic system.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention provides a secondary loop under variable load working conditionA system feed water temperature adjusting method and system; based on the requirement of the reactor thermal hydraulic system test on feed water temperature control, a condenser is arranged at the upstream of a temperature adjusting water tank of a two-loop system, and the feed water temperature is adjusted by adjusting the primary side characteristic quantity and the secondary side characteristic quantity of the condenser under different steam load working conditions in the reactor thermal hydraulic system test; adjusting the temperature of the steam-cooled condensate water to be within a first target temperature range (T) by varying the condenser cooling water input flow ref +/-5 ℃) of the condenser and a temperature regulation water tank is arranged at the downstream of the condenser, and the temperature regulation water tank further controls the temperature of water in the temperature regulation water tank to be within a second target temperature range (T) ref +/-2 ℃) and the scheme is used for the reactor transient thermal hydraulic system test, so that the feed water temperature of the reactor thermal hydraulic system test can be adjusted to be within a reference temperature value range under different working conditions.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort. In the drawings:
FIG. 1 is a schematic flow chart of a method for adjusting the feed water temperature of a two-circuit system under a variable load condition;
FIG. 2 is a schematic diagram of a feed water temperature adjusting system of a two-circuit system under a variable load condition;
FIG. 3 is a schematic diagram of a method for adjusting the feed water temperature of a two-circuit system under a variable load condition;
FIG. 4 is a schematic view of a condenser section and piping connections.
Reference numbers and corresponding part names in the drawings:
the method comprises the following steps of 1-a condenser, 2-a temperature adjusting water tank, 3-a cooling water main adjusting valve, 4-a flow meter, 5-a cooling water adjusting valve group, and 6-a heat exchanger, 7-a heat exchanger branch adjusting valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
The nuclear reactor thermohydraulic system test generally comprises the adjustment of a primary loop system and the adjustment of a secondary loop system. An important parameter in a two-loop of a nuclear reactor thermal hydraulic system test device is the feed water temperature, and the adjustment of the feed water temperature is an important link in the control process of the two loops.
Example 1
The embodiment provides a method for adjusting the feed water temperature of a two-loop system under the working condition of variable load, as shown in fig. 1, the method comprises the following steps:
the method comprises the following steps: a temperature regulating water tank is arranged at the downstream of a condenser of the two-loop system and receives condensed water generated at the primary side of the condenser;
step two: collecting the characteristic quantity of the primary side of a steam input port of a condenser and the characteristic quantity of the secondary side of a cooling water input port of the condenser, and collecting the temperature of a condensate water output port of the condenser;
step three: adjusting the primary side characteristic quantity and the secondary side characteristic quantity to stabilize the temperature of a condenser condensate water outlet at a first target temperature, and specifically comprising the following substeps:
s31, when the temperature of a condenser condensed water output port is not within a first target temperature range, taking the flow of a condenser steam input port as a driving quantity and the flow of a condenser cooling water input port as a driven quantity, adjusting the driving quantity by a double-closed-loop ratio control method, and enabling the driven quantity to change along with the change of the driving quantity to enable the temperature of the condenser condensed water output port to be close to the first target temperature range;
and S32, acquiring the temperature of the condensate water output port of the condenser in the feedback of S31, and adjusting the flow of the cooling water input port of the condenser to keep the temperature of the condensate water output port of the condenser stable.
Step four: and adjusting the temperature adjusting water tank to stabilize the temperature in the temperature adjusting water tank at a second target temperature. The second target temperature range is included in the first target temperature range.
The feed water temperature adjusting principle of the thermal hydraulic system test provided by the embodiment is mainly that the temperature of condensed water cooled by steam is adjusted to be within a first target temperature range (T) by changing the input flow of condenser cooling water ref +/-5 ℃) of the condenser and a temperature regulation water tank is arranged at the downstream of the condenser, and the temperature regulation water tank further controls the temperature of water in the temperature regulation water tank to be within a second target temperature range (T) ref ± 2 ℃); the temperature control device is used for reactor transient thermal hydraulic system experiments, and can adjust the feed water temperature of the reactor thermal hydraulic system experiments to be within a reference temperature value range under different working conditions.
The primary-side characteristic amount includes: the temperature of the condenser steam input port, the pressure of the condenser steam input port and the flow rate of the condenser steam input port; the secondary side characteristic quantity comprises the flow of a condenser cooling water input port.
Example 2
The present embodiment provides a system for adjusting the feedwater temperature of a two-circuit system under variable load conditions, as shown in fig. 2, including: the system comprises a condenser 1, a cooling water regulating valve group 5, a temperature regulating water tank 2, an acquisition module and measurement and control software;
the condenser 1 inputs condensed water into the temperature adjusting water tank 2, the cooling water adjusting valve group 5 is connected with a cooling water input port of the condenser 1, and the cooling water adjusting valve group 5 is used for adjusting the flow of the cooling water input port of the condenser 1;
the collecting module is used for collecting the characteristic quantity of the primary side of the steam input port of the condenser 1 and the characteristic quantity of the secondary side of the cooling water input port, and is also used for collecting the temperature of the condensate water output port of the condenser; the collecting module mainly comprises a pressure, flow and temperature collecting device arranged at a steam input port of the condenser 1, a flowmeter arranged at a cooling water input port of the condenser 1 and a temperature sensor arranged at a condensed water output port of the condenser.
And the measurement and control software is used for adjusting the primary side characteristic quantity and the secondary side characteristic quantity to enable the temperature of the condenser condensate water output port to be stabilized at a first target temperature.
The feed water temperature regulating system also comprises a heat exchanger regulating branch which is arranged behind the temperature regulating water tank 2; the heat exchanger 6 can further accurately adjust the temperature; the heat exchanger regulating branch comprises two parallel branches, wherein one branch comprises a heat exchanger 6 and a flow regulating valve 7; the other branch can be a light pipe, and a flow regulating valve can also be installed. The fluid from the thermostatically controlled water tank 2 flows through the majority of the branch without the heat exchanger 6 and only a small portion of the branch with the heat exchanger 6. If the temperature of the water flowing out of the temperature adjusting water tank 2 meets the experimental requirements or is lower than the experimental requirements, closing a flow adjusting valve 7 on the branch of the heat exchanger; if the temperature of the water flowing out of the temperature regulating water tank 2 is higher than the experimental requirement, the flow regulating valve 7 on the heat exchanger branch is given an opening degree, so that a small part of the flow of the fluid flows through the heat exchanger branch, and the temperature is reduced. After mixing with the branch fluid without the heat exchanger, the temperature meets the experimental requirements.
The temperature regulation water tank 2 is a sealed pressure container, 3N electric heating elements are arranged at the bottom of the sealed pressure container, 2N electric heating elements are a direct-throw set, N electric heating elements are a regulation set, the temperature in the temperature regulation water tank is stabilized in a second target temperature range by changing the power of the electric heating elements of the regulation set through measurement and control software, and the second target temperature range is contained in a first target temperature range.
The condenser 1 is a shell-and-tube type, the fluid inside the shell is steam, and the fluid inside the tube body is cooling water. The steam part of the condenser is in a shell type, and the internal fluid is steam; the tubular internal fluid is cooling water.
Cooling water governing valve group 5 includes a cooling water main regulating valve 3 and two parallelly connected branch road governing valves, and cooling water main regulating valve 3 is used for the control to flow to the cooling water of branch road governing valve, and two parallelly connected branch road governing valves are used for adjusting the cooling water of input condenser 1, and flowmeter 4 installs and carries out cooling water flow monitoring in 3 low reaches of condensate water main regulating valve. And the cooling water regulating valve group 5 regulates the flow of the cooling water inlet of the condenser according to the flow of the steam inlet of the condenser.
As shown in fig. 4, the condenser 1 is divided into 3 different heat transfer areas by partition plates, wherein two heat transfer areas of the area are connected to a cooling water inlet, and the other heat transfer area 3 is connected to a cooling water outlet, in this embodiment, the areas 1 and 2 are respectively connected to the cooling water inlet, and the area 3 is connected to the cooling water outlet.
The principle of this embodiment is shown in fig. 3, where the controlled variable of the condenser 1 is the outlet temperature of the vapour condensate and the controlled variable is the cooling water inlet flow. Factors influencing the outlet temperature of the steam condensate are mainly the condenser steam inlet temperature, the condenser steam inlet flow, the condenser cooling water inlet temperature and the condenser heat transfer area distribution. In order to keep the outlet temperature of the condenser steam condensate at T ref And +/-5 ℃, taking the steam inlet flow of the condenser as a driving quantity and the inlet flow of cooling water of the condenser as a driven quantity, and based on a double closed-loop ratio control method, the driven quantity changes by tracking the change of the driving quantity to realize the accurate flow ratio of the driving quantity to the driven quantity. The temperature of the outlet steam condensate of the condenser is fed back and the flow of the cooling water inlet of the condenser is regulated in a small range, so that the aim of stabilizing the temperature of the outlet steam condensate is fulfilled.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for adjusting the feed water temperature of a two-loop system under the working condition of variable load is characterized by comprising the following steps:
the method comprises the following steps: a temperature regulating water tank is arranged at the downstream of a condenser of the two-loop system and receives condensed water generated at the primary side of the condenser;
step two: collecting the characteristic quantity of the primary side of a steam input port of a condenser and the characteristic quantity of the secondary side of a cooling water input port of the condenser, and collecting the temperature of a condensate water output port of the condenser;
step three: and regulating the primary side characteristic quantity and the secondary side characteristic quantity to stabilize the temperature of a condenser condensate water outlet at a first target temperature.
2. The method for adjusting the feed water temperature of a two-circuit system under the working condition of variable load according to claim 1,
the primary-side characteristic amount includes: the temperature of the condenser steam input port, the pressure of the condenser steam input port and the flow rate of the condenser steam input port;
the secondary side characteristic quantity comprises the flow of a condenser cooling water input port.
3. The method for adjusting the feed water temperature of the two-circuit system under the variable-load working condition according to claim 1, characterized by further comprising the following four steps: and adjusting the temperature adjusting water tank to stabilize the temperature in the temperature adjusting water tank at a second target temperature.
4. The method of claim 3, wherein the second target temperature range is included in the first target temperature range.
5. The method for adjusting the feedwater temperature of the two-circuit system under the variable load working condition as claimed in claim 2, wherein the third step comprises the following substeps:
s31, when the temperature of the condenser condensed water output port is not within a first target temperature range, the flow of the condenser steam input port is used as a driving quantity, the flow of the condenser cooling water input port is used as a driven quantity, the driving quantity is adjusted by a double-closed-loop ratio control method, the driven quantity changes along with the change of the driving quantity, and the temperature of the condenser condensed water output port is close to the first target temperature;
and S32, acquiring the temperature of the condensate water output port of the condenser in the feedback of S31, and adjusting the flow of the cooling water input port of the condenser to keep the temperature of the condensate water output port of the condenser stable.
6. The utility model provides a two return circuit systems feedwater temperature governing system under variable load operating mode which characterized in that includes: the system comprises a condenser (1), a cooling water regulating valve group (5), a temperature regulating water tank (2), an acquisition module and measurement and control software;
the condenser (1) inputs condensed water into the temperature adjusting water tank (2), the cooling water adjusting valve group (5) is connected with a cooling water input port of the condenser (1), and the cooling water adjusting valve group (5) is used for adjusting the flow of the cooling water input port of the condenser (1);
the collecting module is used for collecting the characteristic quantity of the primary side of a steam input port and the characteristic quantity of the secondary side of a cooling water input port of the condenser (1), and is also used for collecting the temperature of a condensate water output port of the condenser;
and the measurement and control software is used for adjusting the primary side characteristic quantity and the secondary side characteristic quantity to enable the temperature of the condenser condensate water output port to be stabilized at a first target temperature.
7. The system for regulating the feed water temperature of the two-circuit system under the variable load working condition as claimed in claim 2, wherein the temperature regulating water tank (2) is a sealed pressure container, the bottom of the sealed pressure container is provided with 3N electric heating elements, 2N electric heating elements are a direct-throwing group, N electric heating elements are a regulating group, and the temperature in the temperature regulating water tank is stabilized within a second target temperature range by changing the power of the electric heating elements of the regulating group through measurement and control software, wherein the second target temperature range is contained in the first target temperature range.
8. The system for regulating the feed water temperature of a two-circuit system under the variable load working condition as claimed in claim 6, wherein the condenser (1) is a shell and tube type, the fluid inside the shell is steam, and the fluid inside the tube body is cooling water.
9. The system for regulating the feed water temperature of a two-circuit system under the variable load working condition of claim 8, wherein the cooling water regulating valve set (5) comprises a main circuit regulating valve and two parallel branch regulating valves, the main circuit regulating valve is used for controlling the cooling water flowing to the branch regulating valves, and the two parallel branch regulating valves are used for regulating the cooling water input into the condenser (1).
10. The system for adjusting the feed water temperature of the two-circuit system under the variable load working condition as claimed in claim 9, wherein the condenser (1) is divided into 3 different heat transfer areas by arranging partition plates, wherein two heat transfer areas of the area are connected to a cooling water inlet, and the other heat transfer area 3 is connected to a cooling water outlet.
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| CN202211372752.1A CN115662666A (en) | 2022-10-31 | 2022-10-31 | Method and system for adjusting feed water temperature of two-loop system under variable load working condition |
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