KR-20260066333-A - SCALE MODEL TEST SYSTEM FOR MIXING FLOW MEASUREMENT OF HIGH TEMPERATURE WATER AND LOW TEMPERATURE WATER

KR20260066333AKR 20260066333 AKR20260066333 AKR 20260066333AKR-20260066333-A

Abstract

The present invention relates to a scaled-down experimental device for measuring high-temperature/low-temperature water flow, capable of measuring the diffusion behavior of a mixed fluid of high-temperature water and low-temperature water having relative temperatures, or a single fluid of high-temperature water or low-temperature water, according to changes in flow rate and/or temperature, and in particular, capable of simulating various flow characteristics, such as turbulent distribution characteristics of the flow, with similarity through changes in various experimental parameters. According to the present invention, the device comprises: a first hot water device; a second hot water device configured to receive fluid from the first hot water device through a fluid connection pipe and to heat the fluid to a temperature higher than the temperature of the fluid in the first hot water device; an experimental observation tank receiving fluid from the second hot water device through a fluid discharge pipe; a water pump pumping fluid to the experimental observation tank through the fluid discharge pipe; a supply fluid measuring means provided in the fluid discharge pipe; an inflow fluid measuring means provided in the experimental observation tank; and a thermal energy measuring means for measuring the thermal energy of the fluid flowing into the experimental observation tank. A model experimental apparatus for measuring hot water flow is provided, characterized by comprising: a control panel configured to control the operation of the first hot water device, the second hot water device, the water pump, the supply fluid measuring means, the inflow fluid measuring means, and the thermal energy measuring means, and to display the control and measurement status.

Inventors

윤석태
조용진

Assignees

동의대학교 산학협력단

Dates

Publication Date: 20260512
Application Date: 20241104

Claims (11)

First hot water device; A second hot water device configured to receive fluid from the first hot water device through a fluid connection pipe and to heat to a temperature higher than the temperature of the fluid in the first hot water device; An experimental observation tank that receives fluid from the second hot water device through a fluid discharge pipe; A water pump that pumps fluid into the experiment observation tank through the fluid discharge pipe; Supply fluid measuring means provided in the above fluid discharge pipe; Inflow fluid measuring means provided in the above-mentioned experimental observation tank; A thermal energy measuring means for measuring the thermal energy of a fluid flowing into the above-mentioned experimental observation tank; and Characterized by including a control panel configured to control the operation of the first hot water device, the second hot water device, the water pump, the supply fluid measuring means, the inflow fluid measuring means, and the thermal energy measuring means, and to display the control and measurement status. Model experimental device for measuring hot water flow.
In paragraph 1, The first and second hot water devices are equipped with a heater and a temperature sensor, and The above-mentioned second hot water device is characterized by further including a water level gauge. Model experimental device for measuring hot water flow.
In paragraph 1 or 2, The diameter of the second hot water device is formed to be larger than the diameter of the first hot water device, and The height of the second hot water device is formed to be smaller than the height of the first hot water device, and The volume of the second hot water device and the volume of the first hot water device (110) are configured to be the same, The above fluid connecting pipe is characterized by being configured so that fluid flows from the upper part of the first hot water device to the lower side of the second hot water device. Model experimental device for measuring hot water flow.
In paragraph 1, The above experimental observation tank is composed of a tank made of transparent material, and The above water pump is characterized by being composed of an inverter-driven water pump. Model experimental device for measuring hot water flow.
In paragraph 1, The above experimental observation tank is composed of a transparent acrylic tank, and The above water pump is characterized by being composed of an inverter-driven water pump. Model experimental device for measuring hot water flow.
In any one of paragraphs 1, 5, and 6, The above thermal energy measuring means is Characterized by being composed of at least one of an infrared (IR) camera or a thermal imaging camera provided on at least one of the upper side and the lower side of the above-mentioned experimental observation tank. Model experimental device for measuring hot water flow.
In paragraph 1, The above supply fluid measuring means includes a flow meter, a pressure gauge, and a temperature sensor, and The above-mentioned inflow fluid measuring means is characterized by including a temperature detection module and a water level gauge. Model experimental device for measuring hot water flow.
In Paragraph 7, The temperature detection module includes a first temperature sensor provided at the bottom of the experiment observation tank and a second temperature sensor provided at the side wall of the experiment observation tank. The temperature sensor of the supply fluid measuring means and the first temperature sensor and the second temperature sensor of the temperature detection module are characterized by being composed of thermocouple sensors. Model experimental device for measuring hot water flow.
In paragraph 1, Characterized by further including an opening degree control means provided on the discharge side of the fluid discharge pipe and capable of adjusting the opening degree. Model experimental device for measuring hot water flow.
In Paragraph 9, The above opening adjustment means is Characterized by being composed of a manual or electronically controlled valve with a diameter that can be reduced and expanded. Model experimental device for measuring hot water flow.
In Paragraph 10, The above opening adjustment means is composed of an electronically controlled valve, and The above control panel is characterized by comprising a heater control unit, a pump control unit that controls the operation of the water pump, a temperature measurement value receiving unit that receives a signal from a temperature sensor, a water level measurement value receiving unit that receives a signal from a water level gauge, a flow rate measurement value receiving unit that receives a signal from a flow rate gauge, a pressure measurement value receiving unit that receives a signal from a pressure gauge, an opening control unit that controls the opening of the electronically controlled valve, and a display unit that displays the control status of the heater control unit, the pump control unit, and the opening control unit, as well as their respective received measurement values. Model experimental device for measuring hot water flow.

Description

Scale Model Test System for Mixing Flow Measurement of High/Low Temperature Water The present invention relates to a scaled-down experimental device for measuring hot water flow, and more specifically, to a scaled-down experimental device for measuring hot/low water flow that can measure the diffusion behavior of a mixed fluid of hot water and low water having relative temperatures, or a single fluid of hot water or low water, according to changes in flow rate and/or temperature, and in particular, can simulate various flow characteristics, such as turbulent distribution characteristics of the flow, with similarity by changing various experimental parameters. The condenser in a nuclear power plant plays the role of converting the steam remaining after rotating the turbine back into water and supplying it to the steam generator; in this process, seawater is used as the cold cooling water required to cool the steam and convert it into water within the condenser. This cooling water passes through a condenser via a seawater pump connected to the outside of the power plant and is then discharged back into the sea. Since the cooling water, which has undergone heat exchange, is discharged as low-temperature seawater, it is necessary to consider the appropriate discharge temperature, the normal operation of the cooling water supply system, and the impact of environmental changes, flow measurement and analysis of the discharged cooling water are required. Meanwhile, as is well known, simulations or model tests are utilized in various fields to identify and resolve problems that may arise from various factors in real-world situations. Furthermore, to ensure the reliability of these simulations, technologies combining software and hardware are being actively developed to precisely reproduce situations that more closely resemble actual conditions. As mentioned above, there is a need for research and development of experimental devices capable of reliably simulating various flow characteristics with similarity, such as the behavior of fluids resulting from the mixing of relatively high-temperature water, like the cooling water used in nuclear power plants, with low-temperature water, or fluids having a predetermined temperature. FIG. 1 is a schematic diagram illustrating a scaled-down model experimental apparatus for measuring high-temperature/low-temperature water flow according to the present invention. FIG. 2 is a block diagram showing the configuration of a control panel included in a scaled-down model experimental device for measuring high-temperature/low-temperature water flow according to the present invention. Figure 3 is a diagram illustrating the similarity between actual and model turbulence (left) and a photograph of the thermal energy of turbulence (right). FIGS. 4 to 6 are photographs of a scaled-down experimental apparatus for measuring high-temperature/low-temperature water flow according to the present invention. Figures 7 to 11 are graphs showing experimental results of flow rate, pressure, and water level over time according to the opening diameter of the opening control means, respectively, in a non-heated state of the fluid. Figure 12 is a table showing the opening diameter, flow rate, and fluid temperature conditions of the opening control means (left) and the kinematic viscosity coefficient according to changes in 10°C intervals (right). Figure 13 is a table showing the Reynolds number according to opening diameter and temperature. Figure 14 is a photograph capturing a specific frame of an image taken of the track distribution of surface temperature (heat), where the right side is grayscale and the left side is rainbow scale. Further objects, features, and advantages of the present invention can be more clearly understood from the following detailed description and the accompanying drawings. Before providing a detailed description of the present invention, it should be understood that the present invention is capable of various modifications and may have various embodiments, and that the examples described below and illustrated in the drawings are not intended to limit the present invention to specific embodiments, but rather include all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. The terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In