KR100403237B1 - A system of radiant floor cooling using Ondol and the control method of condensation of it - Google Patents

Abstract

The present invention is to apply the floor ondol structure used for heating in the existing apartment house for cooling, radiant cooling system for cooling the room by supplying cold water to the piping in the ondol and operation control method for preventing condensation of the radiant cooling system It is about. In other words, in applying the existing heating system to the cooling system in summer, despite the high temperature and humidity climatic characteristics, it prevents condensation on the floor surface, eliminates latent heat load in the room, and makes the system comfortable and economical. And an operation control method for preventing condensation of the radiation cooling system.

The present invention provides a radiant cooling system using a floor ondol structure and an operation control method for preventing condensation of the radiant cooling system, while simultaneously reducing dust scattering and draft phenomena generated when using a package air conditioner as a cooling device. The energy reserve ratio can be increased according to the peak power demand due to the temporary increase in the demand for cooling in the summer, which can reduce the national economic budget, and the comfort of the occupants is maintained by radiant cooling, resulting in energy saving. Economic effect can be obtained.

Description

Radiation cooling system using floor ondol structure and operation control method for condensation prevention of radiation cooling system {A system of radiant floor cooling using Ondol and the control method of condensation of it}

The present invention is to apply the floor ondol structure used for heating in the existing apartment house for cooling, radiant cooling system for cooling the room by supplying cold water to the piping in the ondol and operation control method for preventing condensation of the radiant cooling system It is about.

In Korea, a floor radiant heating system using ondol has been used as a heating method for homes, but in the past, due to technical problems, economic problems, and living standards, air conditioning facilities have not been considered. Per-generation packaged air conditioners have begun to be used. However, with the recent development of the domestic industry and the increase of national income, the demand for cooling has increased, so the installation of package air conditioners has increased rapidly, and problems such as the increase in the power demand of apartment houses in summer have caused problems. In particular, in the case of multi-unit housing, there is a need to develop an energy-saving cooling system that can be applied during the design and initial construction stages.

Problems that occur when using a packaged air conditioner for cooling in an existing general house, especially apartment houses are as follows.

First, cooling by package air conditioner may cause unpleasant feelings due to dust scattering or draft due to abrupt indoor airflow caused by intake or discharge of air. Second, outdoor and indoor unit by generation when using package air conditioner in apartment house Since the noise is generated by the machinery near the living area, it creates an unpleasant living environment. Third, the maximum power demand is generated by the temporary increase in cooling demand during the summer. As the budget execution for securing energy, such as the construction of additional power plants, increases, an uneconomic vicious cycle continues. Fourth, cooling by the package air conditioner controls the temperature and humidity using air as a medium through convection heat exchange. Lower temperature than the way temperature is controlled As it keeps the comfort of the occupants at the temperature, it causes energy loss. Fifth, the existing radiant floor radiant heating system is not utilized in summer and another facility investment cost for air conditioning system is incurred. There are many problems such as overlapping investment in heating and cooling facilities.

The present inventors have developed the concept of a radiant cooling system using ondol, taking advantage of the fact that utilizing the ondol floor structure installed for conventional heating is advantageous in terms of effective area utilization, resource saving, and environmental problems. In the development process, radiant cooling is a method of radiant heat exchange by cold surfaces. In Korea, high temperatures and humidity are required during the summer when cooling is required. Recognizing the necessity of the control technology to reduce the occurrence, it is necessary to analyze the existing control method and to establish the possible control method through the analysis of the relationship with the control factors and to derive the appropriate control method to prevent condensation on the floor surface. Residents remove latent heat load in the room Comfort while the system was reached in deriving the copies economical cooling system invention the operation control method for copying cooling system and prevent condensation in the air-conditioning system using a copy bottom floor heating structure.

Accordingly, the present invention has been proposed to solve the above-mentioned problems, and the scattering and draft phenomenon of dust generated when using the package air conditioner alone as a cooling device, the mechanical noise generated near the living area, the temporary increase in cooling demand in summer The purpose of the present invention is to provide a radiative cooling system using a floor ondol structure and a condensation prevention method of the radiant cooling system that can reduce problems such as waste of national economic budget for maximum power demand.

In addition, the present invention was not able to utilize the existing heating equipment of the floor radiation heating method of the existing ondol of the apartment house in the summer, by using the idle equipment and using the package air conditioner in the dehumidification mode to control the indoor humidity, without the occurrence of condensation pleasant and power It is an object of the present invention to provide an operation control method for preventing condensation of a radiant cooling system and its radiant cooling system using an economical floor ondol structure because the consumption can be greatly reduced.

In addition, the present invention is to control the temperature by radiant heat exchange to maintain the comfort of the occupants at a high set temperature, the radiation cooling system using a floor ondol structure that brings energy saving and operation control method for preventing condensation of the radiation cooling system It aims to provide.

1 is a conceptual diagram showing the configuration of the radiation cooling system of the present invention.

2 is a conceptual diagram showing the configuration of the floor radiation cooling system as an embodiment of the present invention.

3 is an example of analyzing the change over time of the condensation occurrence factor of the present invention through a simulation.

4 is a conceptual diagram showing a condensation generation control factor of the present invention.

5 is an example of analyzing the relationship between the outside air humidity and the indoor humidity of the present invention through a simulation.

6 is an example of analyzing the relationship between the bottom surface temperature and the dew condensation in the present invention through a simulation.

7 is a conceptual diagram of a control system for controlling a distribution system in the conceptual diagram of FIG. 1 to maintain a room temperature in a set temperature range and to check whether condensation has occurred and to prevent it.

8 is a block diagram schematically showing the configuration of the facility according to the first and seventh.

9 is a conceptual diagram showing a possible combination of a cooling heat source system of a radiative cooling system as an embodiment of the present invention.

FIG. 10 is a block diagram illustrating a heat source system that can be used when a heavy water absorption type refrigerator is used in a plant for supplying a heat source of an existing multi-unit house in FIG. 9.

Figure 11a is a block diagram of the open / close control method.

11B is a block diagram of the oil amount control method.

Figure 11c is a block diagram for the room temperature feedback outside compensation control system.

FIG. 12 is a diagram comparing room temperature, bottom surface temperature, and expected average thermal feeling with respect to FIGS. 11A to 11C.

FIG. 13 is an example of comparing and analyzing the cumulative time of room temperature distribution with respect to FIGS. 11A to 11C.

14 is a measurement example showing a change in the dew condensation rate according to the change in the number of ventilation of the present invention.

FIG. 15A shows a specific example of the control algorithm of the present invention and is a block diagram showing control based on room temperature through “open / close control + ventilation control”.

Figure 15b is a block diagram showing another embodiment of the control algorithm of the present invention, the control is mainly to prevent the dew condensation through "opening control + ventilation control".

FIG. 15c shows another specific example of the control algorithm of the present invention, and is a block diagram showing control based on room temperature through "open / close control + air conditioning dehumidification control".

FIG. 15d shows another specific example of the control algorithm of the present invention, and is a block diagram showing control of dew condensation prevention through “open / close control + air conditioner dehumidification control”.

FIG. 15E shows another specific example of the control algorithm of the present invention, and is a block diagram showing control based on room temperature through " Outdoor compensation room temperature feedback control + ventilation control ".

FIG. 15F shows another specific example of the control algorithm of the present invention, and is a block diagram showing control of dew condensation prevention mainly through “outdoor compensation room temperature feedback control + air conditioner dehumidification control”.

FIG. 15g shows another specific example of the control algorithm of the present invention and is a block diagram showing that the control is based on room temperature through " outdoor compensation room temperature feedback control + air conditioning dehumidification control ".

FIG. 15h shows another specific example of the control algorithm of the present invention, and is a block diagram showing control of dew condensation prevention mainly through "outdoor compensation room temperature feedback control + air conditioner dehumidification control".

FIG. 16 is a block diagram showing another specific example of the control algorithm of the present invention, and focuses on preventing dew condensation through "open / close control + air compensation room temperature feedback control + air conditioning dehumidification control".

17 is a conceptual diagram showing a system configuration according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: cold heat source system 200: actual load processing system

300: distribution system 400: control system

410: detector 420: calculator

430: control panel

Radiation cooling system using the floor ondol structure of the present invention and the operation control method for preventing condensation of the radiation cooling system, installing a heat insulating material on the concrete slab and forming a heat storage layer such as a gravel layer on the heat storage layer the heat storage layer Supplying cold water to the hot water heating pipe by using a floor ondol structure buried in the upper portion and finished with cement mortar; A cold heat source system 100 for creating cold heat through a heat source; A real load processing system 200 for removing the load from the target space; A distribution system (300) for transferring cold heat to the actual load processing system located in the target space; And a detection unit 410 for measuring cooling determinants such as indoor temperature, indoor humidity, floor surface temperature, outdoor temperature, and outdoor humidity with a plurality of sensors, and combining the results of the measured detection unit 410 to obtain dew point temperature or enthalpy. A calculation unit 420 for executing a control algorithm for determining whether to operate the cooling unit and a risk of dew condensation, and an operation unit for manipulating the valves of the floor ondol panel of the distribution system 300 according to the control algorithm of the calculation unit 420. Control system 400 is configured to include, 430 to maintain the room temperature in the set temperature range and to check the occurrence of condensation to control the operation of the distribution system 300; It is configured to include, the operation unit 430 of the control system 400 is characterized in that to operate by operating a ventilation fan or a package air conditioner installed in the room, the floor ondol panel valve operation.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a conceptual diagram showing the configuration of a radiative cooling system, the present invention is a cooling source system (cooling source system) and each object to create a cooling heat through a heat source such as electricity, gas, district heating, geothermal heat as shown in FIG. The load may be divided into a load system (terminal unit) for removing a load from a space and a distribution system for transferring cold heat to a real load processing system located in a target space. Here, the radiant cooling system generally refers to using a floor radiant cooling panel or a ceiling panel in configuring a real load treatment system. In the present invention, the radiant floor cooling is used to cool an ondol structure of a floor used for heating in an existing house. The present invention also applies to cold water, as shown in FIG.

In order to apply the concept of floor radiation cooling to our housing reality, the following considerations should be considered. First, in the summer, the air conditioner has a higher temperature and humidity than the heater, so in order to use the existing heating system for cooling purposes, it is necessary to solve the problem of condensation on the floor surface and the removal of latent heat load. Unlike conventional convection cooling using packaged air conditioners, as the occupants and the radiating floor surface become closer, the warmth of the occupants is affected by the radiating floor surface. Therefore, the possibility of discomfort caused by the decrease of the floor surface temperature is examined. shall.

As shown in FIGS. 3 and 4, the factors influencing condensation on the bottom surface are 'floor surface temperature', 'room temperature' and 'room humidity'. That is, dew condensation on the bottom surface occurs when the bottom surface temperature falls below the dew point temperature of the seal.The dew point temperature of the seal changes with the change of room temperature and the room absolute humidity, and the bottom surface temperature changes according to the change of supply cold water. do. The change in room temperature is caused by external load factors such as solar radiation and internal load factors such as human body, lighting, and device invention.The change in the absolute humidity of the room is caused by the change of humidity due to ventilation or infiltration and the latent heat of human body or equipment. It is changed by the load factor. In addition, when controlling room temperature by supplying cold water, condensation cannot be prevented. Therefore, indoor humidity and floor surface temperature should be taken as a factor for controlling condensation. To do this, first, it is necessary to grasp the correlation between the floor surface temperature and the absolute indoor humidity in relation to condensation. Therefore, according to the dew condensation, the distribution of absolute humidity in the outside and the room and the distribution of floor surface temperature should be analyzed.

As a result of analyzing the relationship between the factors through the simulation as shown in FIG. 5 and FIG. 6, it was found that the absolute humidity of the room was greatly influenced by the absolute absolute humidity during the cooling period. Looking at the relationship between the absolute outdoor humidity and the absolute indoor humidity, it can be seen that there is a strong correlation, and when the condensation occurs, the absolute humidity is about 18g / kg at the standard weather condition of Seoul as shown in FIG. Condensation began to occur, and condensation did not occur when the absolute outdoor humidity was less than 20 g / kg. In addition, the supply cold water temperature and the bottom surface temperature are closely related. Analysis of the bottom surface temperature according to the dew condensation was confirmed that the risk of condensation is reduced when the bottom surface temperature is more than 25 ℃ as shown in FIG.

Therefore, the present inventors, while adopting the floor radiation cooling system for controlling active dew condensation, because the temperature range is too narrow to control the dew condensation around the bottom surface temperature, rather than controlling the dew condensation based on the floor surface temperature. It has been found desirable to control the room humidity criteria.

FIG. 7 is a conceptual diagram of a control system for controlling a distribution system in the above-described conceptual diagram of FIG. 1 to maintain a room temperature in a set temperature range and to check whether condensation has occurred and to prevent it. FIG. 8 is a schematic view of FIGS. Figure is a block diagram schematically showing the configuration of the facility.

The goal of controlling the bottom radiation cooling of the present invention can be thought of as divided into maintaining the room temperature in the set temperature range through cooling and suppressing the occurrence of condensation during cooling, if simply controlling the room temperature in the set temperature range 7th Although only the room temperature needs to be measured by the detector 410 of FIG. 4 (but the outside air temperature is also measured in the case of the air compensation control). Temperature should be measured. In addition, when controlling the cooling and dew condensation through ventilation, the outside air temperature or the outside humidity should be measured to calculate the enthalpy of the outside air.

Therefore, the present invention is characterized in that the cold water is supplied to the hot water heating pipe using the existing floor heating structure for radiant heating as described above; A cold heat source system 100; a real load processing system 200; Distribution system 300; And a control unit 400 including a detection unit 410, an operation unit 420, and an operation unit 430 to control the operation of the distribution system 300. The present invention relates to a radiant cooling system and an operation control method for preventing condensation in consideration of the comfort of the occupants during cooling and the economical efficiency of operation.

The calculating unit 420 of FIG. 7 generates a control algorithm by using the result values of the indoor temperature, the indoor humidity, the floor surface temperature, the outside air temperature, and the outside humidity measured by the sensor in the detector 410. The operation unit 420 determines the dew condensation in order to suppress the occurrence of condensation while maintaining a comfortable room temperature, which is the ultimate control target of the present invention, and according to the control method of the detection unit 410 and the operation unit 430 described later. Various algorithms are written to determine the cooling method.

The operation unit 430 of FIG. 7 operates the valve of the bottom ondol panel of the distribution system 300 according to the control algorithm of the operation unit 420. In the control method of the operation unit 430, the cold water supplied to the floor panel There is a method of controlling the temperature and the method of controlling the flow rate of cold water. 'Cooling temperature control of supply temperature' is a method of controlling the room temperature with the outside air temperature and the room temperature among the measured variables of the detection unit 410 by supplying the cold water temperature to the bottom panel using a three-way valve. Atmospheric compensation room temperature feedback control, and 'supply cold water flow rate control' includes an open / close control to control the flow rate intermittently and a flow rate control to intermittently control the flow rate. Among them, the retractable control includes retractable bang bang control (using on / off valves, commonly referred to as retractable control, commonly used in Korean apartment houses) and retractable pulse control.

In the present invention, 'om / off Bang-Bang control' (hereinafter referred to as 'open / close control') mainly used in existing central apartments to compare control methods and 'variable flow control using two-way valves' control ',' outdoor reset with indoor temperature feedback control 'using a 3-way valve or 4-way valve is considered as a control method of the radiative cooling system. A block diagram for the control method is presented.

12 to 13 are diagrams showing performance analysis results for the three control schemes.

12 is a comparison of room temperature, floor surface temperature, and PMV (predicted mean vote) for each control method. In all three methods, room temperature is controlled to within ± 1 ° C and the room temperature distribution during the cooling period. Looking at the frequency, it can be seen that the room temperature is maintained well in the order of the air conditioning room temperature feedback control, the open-close control, and the flow rate control as shown in FIG.

The performance analysis results of FIGS. 12 and 13 are summarized as a table as follows.

Table 1.Comparison of accumulated condensation time, room temperature, floor surface temperature and PMV results for each control method

Retractable control Flow rate control External Compensation Room Temperature Feedback Control on off Open Fullyclosed Cumulative time of condensation (hr) 284.6 59.5 314.9 19.0 287.3 344.0 333.9 Room temperature (℃) Average 25.7 25.7 25.9 Standard Deviation 0.7 0.7 0.5 Value 27.5 27.2 27.4 Minimum value 24.3 24.1 24.3 Floor surface temperature (℃) Average 24.3 24.2 24.6 Standard Deviation 1.0 0.8 0.6 Value 26.0 25.6 25.5 Minimum value 22.5 22.6 22.5 PMV (expected average heat feeling) 0 to 0.2 6.0 39.5 10.0 0.2 to 0.4 196.0 233.5 141.0 0.4 to 0.6 490.5 467.0 516.0 0.6 to 0.8 413.5 376.5 493.5 0.8 to 1.0 166.0 155.5 110.5 The total analysis time is 1,271 hours.

As a result of analyzing the PMV value of each control method as shown in Table 1, it can be seen that the air conditioning room temperature feedback control is maintained more in the comfort zone range than the open-ended control and the variable flow rate control. As shown in Table 1, the condensation occurrence time is shown in order of low temperature compensation room temperature feedback control, variable oil flow control, and open / close control. Considering only the dew condensation, 73% of the retractable control, 75% of the variable flow rate control, and 78% of the ambient compensation room temperature feedback control were able to cool down the floor. About 67% of the total cooling period.

The above three control methods are applied as a basic control system in the floor radiant cooling system of the present invention, the conventional heating control system is open and close control using the on / off valve installed in the room for the existing heating as it is, the existing heating controller (controller) Cooling mode is added, and the flow rate control is used by replacing the on / off valve installed in the room for the existing heating with 2-way modulating valve and adding the cooling mode to the existing heating controller. The room temperature feedback air compensation control can be used by replacing an on / off valve installed in a private room with a three-way valve and adding a cooling mode to an existing heating controller.

In the present invention, a method of controlling the valve of the basic floor panel is used by applying a dehumidification system such as a ventilation fan or a package air conditioner for active condensation prevention. To this end, we first selected room temperature, room humidity, and floor surface temperature as the condensation control factors, and then we investigated the relationship between them and suggested a control method that can minimize condensation only by floor radiation cooling. In order to use the package air conditioner for the purpose of dehumidification, it is divided into three cases according to whether the air conditioner is cooled by air conditioner and the operation method, and after analyzing the applicability to the floor radiative cooling system, Based on the scheme, we proposed a control method for a system using a package air conditioner for dehumidification purposes. The condensation prevention control in the present invention was applied in six types according to the above process.

The first is cooling operation by floor temperature during cooling control by floor temperature and dew point temperature. After determining whether to cool based on floor set temperature, measure floor surface temperature and dew point temperature to prevent condensation during cooling. First of all, the control to stop the cooling is carried out. The detailed control method measures the floor temperature at each time point and performs the cooling operation when the temperature is higher than the floor setting temperature. When the dew point temperature is higher than the floor surface temperature, cooling is stopped first to prevent condensation. In addition, as a concept of the safety factor against condensation, the floor surface temperature is controlled to be maintained at a temperature of 0 ~ 3 ℃ higher than the dew point temperature. As a result of simulation, condensation occurred about 300 hours in August when floor surface temperature was compared with dew point temperature without introducing safety factor, and condensation occurred when 3 ℃ was added to dew point temperature as safety factor. It can be seen that this decrease to 31 hours.

The second is the cooling operation by room temperature during the cooling control by floor temperature and dew point temperature. It determines the cooling status based on the indoor set temperature, and measures and calculates floor surface temperature and dew point temperature to prevent condensation during cooling. First of all, the control to stop the cooling is carried out. The detailed control method measures the indoor temperature at each time point and performs the cooling operation when the temperature is higher than the indoor set temperature. When the dew point temperature is higher than the floor surface temperature, cooling is stopped first to prevent condensation. In addition, as in the first control method, the floor surface temperature is controlled to be 0 to 3 ° C. higher than the dew point temperature as a concept of a safety factor against dew condensation. As a result of the simulation, the condensation time decreased as the safety factor increased, but the room temperature increased, and condensation occurred about 3 hours in August even when a relatively low safety factor (1 ℃) was applied. Could know. However, no condensation occurred during all periods except for the sudden increase in humidity.

As a result of simulating the above two condensation prevention control, it can be seen that the radiation condensation rapidly decreases when the radiant cooling is operated at a constant temperature difference (safety factor) of about 2 to 3 ° C. between the room temperature and the dew point temperature.

Third, by controlling the cooling by the room temperature and the dew point temperature, the indoor temperature is controlled to be cooled while maintaining a constant distance from the dew point temperature. The detailed control method measures the indoor temperature at each time point and is higher than the indoor set temperature. During cooling operation, cooling is stopped first by preventing the occurrence of condensation when the risk of condensation is expected, that is, when the temperature difference between the room temperature and the dew point temperature is smaller than the set temperature difference (2 to 3 ° C). As a result of the simulation, the dew condensation time in August was about 3 hours, which is the same as the second floor surface temperature and dew point control (room temperature standard cooling operation). This means that radiant cooling can be controlled even by measuring room temperature and humidity without measuring floor surface temperature. As a result, at least three sensors (floor temperature measurement, indoor humidity measurement, and room temperature measurement) require the above two condensation prevention control systems, but cooling control by indoor temperature and dew point temperature does not require measurement of floor surface temperature. It can be seen that radiation cooling can be controlled more easily.

The three condensation prevention control systems described above are further applied to the 'open / close control', 'flow rate control' or 'room temperature feedback outdoor air compensation control', which is used as a heating control method in the ondol structure of an existing house. Allows the operator to selectively operate the appropriate mode for the cold water supplied.

In addition, the fourth is to install a ventilation fan in the living space together with the floor radiative cooling system to configure the control system to prevent condensation. The fifth is to use the mechanical system more actively with the floor radiative cooling system. The general package air conditioner operates in the dehumidification mode to form a control system to prevent condensation.

In order to control indoor humidity, it is necessary to analyze the effect of each factor on the dew condensation by analyzing the dew condensation according to the change of the factors related to the indoor humidity generation. Factors affecting indoor humidity change include latent heat generation by indoor residents and devices and latent heat generation by ventilation. Among them, latent heat generated by devices is small in living spaces such as the main room except kitchens. The inventors analyzed the incidence of condensation on the floor surface according to the change in the number of occupants and the amount of ventilation during the cooling period.

As a result of the simulation, as the number of occupants increased, the latent heat load of the room increased and the dew condensation rate increased proportionally.In the case of controlling only room temperature without actually controlling humidity, only floor radiation cooling prevented condensation. As the latent heat load increases, the indoor absolute humidity increases as the latent heat load increases. Therefore, it was found that the floor radiation cooling and a separate humidity control system should be provided to prevent condensation under high humidity conditions in the summer of our country. The dew condensation incidence changes as shown in FIG. 14, with the highest condensation incidence at 0.4 ventilation / hr, and the condensation incidence gradually decreased as the value increased. If the amount of fresh air infiltrated per hour of the apartment is 0.4 times / hr, the condensation rate may be up to 2 times higher than that of the ventilation system without a separate ventilation system. However, even if the ventilation amount is 2 times / hr, the dew condensation rate does not change significantly, and considering the ventilation, the proper number of ventilation is 2 times / hr will be appropriate.

In order to use the package air conditioner for the purpose of dehumidification, it was divided into three cases according to whether the air conditioner was cooled by air conditioner and the operation method. In other words, if the air conditioner is not cooled, the air conditioner is operated by the start / stop of the air conditioner at the normal set room temperature (temperature control mode), and the air conditioner is operated for the purpose of indoor dehumidification (dehumidification mode). The measurement was carried out by repeating the work cycle. As a result, it was found that the summer cooling load of apartment houses not only influences external loads such as solar radiation and outside air temperature, but also the effect of sudden ventilation or internal heat generation. If used together with the existing air conditioner to solve the initial indoor load conditions and indoor dehumidification, it is possible to significantly shorten the time required for stabilizing the initial room temperature and lower the humidity of the room than if only floor radiant cooling is applied. I knew that.

The power consumption of an air conditioner is largely divided into two stages. When the compressor is operated, about 1.7 kW of power is consumed, but when only the fan is operated, about 0.17 kW of power is consumed. Because the room temperature is controlled by a small temperature deviation, the compressor runs once every two minutes and only the fan runs for about eight minutes. The compressor has been running about six times an hour and most of the time only the fan is running. Therefore, when the existing air conditioner is used for dehumidification purposes rather than room temperature control purposes, the operating time of the compressor can be greatly reduced, and thus power consumption can be greatly reduced.

The analysis results of the package air conditioner in the dehumidification mode and the bottom radiative cooling are as follows.

As a result of the dehumidification mode operation to maintain the relative humidity at 55 ± 5%, the initial indoor humidity of 13g / kg, as shown in FIG. 5, was reduced to 8g / kg after being dehumidified by the air conditioner for about 10 minutes. It took about 2.5 hours to return to the original condition. As the outside temperature lowered, the time interval gradually decreased. This is because relative humidity decreases faster than the first time because the temperature of the living room decreases as the outside temperature decreases. In addition, the change in room temperature showed a change of about 22 to 26 ° C. When operating in the dehumidification mode, the room temperature may be subcooled to a temperature lower than the comfort temperature. Therefore, the humidity should not be set too low for comfort. When using an air conditioner in dehumidification mode, the number of dehumidifications during the day depends on the room temperature and the set humidity. However, room temperature and room humidity are greatly influenced by outside air intake such as ventilation. Therefore, in order to determine the number of dehumidification, it is necessary to reflect the change in outside temperature and outside humidity during the cooling period. If there is no sudden ventilation, the room humidity increases proportionally with time, the maximum value and the time taken to increase the temperature are determined by the room temperature, the outside humidity and the amount of infiltration. If the room temperature and the outside air temperature is about 25 ℃ it can be seen that it takes about 2.5 hours to increase the relative humidity from 50% to 60%.

As a result, it was concluded that cooling and dehumidification by package air conditioner is possible as a method of dehumidification to prevent condensation during floor radiant cooling.

Controlling room temperature does not completely prevent condensation on the floor surface during the entire cooling period, so room humidity must be controlled to prevent condensation. Therefore, the present inventors applied a cooling or dehumidifying method of ventilation or air conditioner as a method for controlling indoor humidity through simulation of the existing control method. In the control method, when the floor radiant cooling is applied to the existing apartment house, the air conditioning room temperature feedback control is the best in terms of control performance of room temperature and floor surface temperature. Therefore, it is possible to apply ventilation or air conditioning dehumidification method while applying the ambient temperature compensation room temperature feedback control method. In addition, since the open control method is used for heating in the existing multi-family house, a ventilation or air conditioning dehumidification method may be considered when using the existing open / close valve.

Therefore, the control of dew condensation is controlled for each control method by applying a ventilation method that introduces outside air and a cooling and dehumidification method using an existing air conditioner as a method for controlling the indoor humidity for the open-close control and the outdoor compensation room temperature feedback control. A simulation was performed to analyze condensation, ventilation fans, air conditioners, and floor panels. Based on this, we proposed a proper control method to prevent condensation and analyzed its applicability. Therefore, in the simulation to control the indoor humidity, it is classified into four cases according to the control method and control method as shown in Table 2, and in the case of risk of dew condensation for each method, control and condensation prevention that give priority to maintaining the room temperature when setting the floor panel are prevented. The simulation was carried out by dividing the control into priority. Room temperature, room humidity, and floor surface temperature were set as control factors to check the condensation in each simulation.In case of applying ventilation, the outside air temperature and humidity were set as control factors to determine absolute humidity and enthalpy of the outside air. Ventilation was determined by comparing with absolute humidity and enthalpy.

Table 2. Control Methods and Control Factors of Simulation for Controlling Indoor Humidity

Control method Control factor Room temperature Room humidity Floor surface temperature Outside temperature Outside humidity Control method Retractable Control Ventilation O O O O O Air conditioner use O O O External compensation room temperature feedback control Ventilation O O O O O Air conditioner use O O O O

In case of applying ventilation, it is assumed that the amount of aeration of apartment buildings is 0.4 times / hour, and in the section where condensation is concerned, the ventilation amount is increased to 2 times / hour by using a ventilation fan. This is because, as a result of the simulation of the present inventors, even if the ventilation amount is 2 times / hour or more, there is no significant difference in the incidence of condensation. The modeling of the air conditioner calculated the dry bulb temperature and absolute humidity at the outlet of the coil by inputting the dry bulb temperature, absolute humidity, air flow rate, and the dry bulb temperature of the air entering the evaporator coil of the air conditioner. It is assumed that the air conditioner used in the apartment house has a cooling capacity of 7㎾, electric power of 2㎾, and the amount of air supplied is 60.34ℓ / s per 1㎾ of air conditioner.

Algorithms for the control system combining the open / close control method and the ventilation fan are shown in FIGS. 15a and 15b. It is an algorithm that determines whether to ventilate by comparing the absolute humidity of the outside air and the enthalpy of the outside air with the absolute humidity of the room and the enthalpy of the room by setting the outside temperature and the outside humidity as a control factor. In the section larger than (Wout), when the indoor and outdoor enthalpy is greater than the indoor enthalpy, the ventilation fan is increased by operating the ventilation fan.

As an embodiment of FIGS. 15A and 15B, algorithms as another embodiment for controlling room temperature and room humidity are the same as FIGS. 15C to 15H.

To evaluate the condensation prevention control performance of each control method, analysis of the change of room temperature and floor surface temperature, condensation occurrence time, ventilation fan and air conditioner usage time was conducted. When applied in combination with the dehumidification method using an air conditioner, condensation could be prevented.

Table 3. Room temperature, rice dropping and dew condensation rate of room temperature, ventilation fan and air conditioner usage time

Room temperature change Floor surface temperature change Condensation occurrence time Ventilation Fan / Air Conditioning Hours Average Standard Deviation maximum at least Average Standard Deviation maximum at least O + V R 26.0 0.6 27.9 24.8 24.2 1.1 26.1 22.3 334 419 C 26.8 0.7 30.0 25.0 25.3 0.9 28.2 22.6 10 192 O + A R 26.0 0.6 28.4 24.9 24.2 1.1 27.9 22.3 0 6 C 26.5 0.5 28.4 25.0 24.9 0.9 27.9 22.6 0 4 T + V R 25.9 0.8 28.7 23.9 24.1 0.8 26.5 22.7 266 360 C 26.1 0.9 30.0 24.5 24.6 0.9 28.1 23.0 19 253 T + A R 26.0 0.4 27.4 25.1 24.3 0.6 27.2 23.0 0 3 C 26.0 0.4 27.4 25.1 24.3 0.6 27.2 23.0 0 3 A 26.1 0.3 27.2 25.2 25.3 0.6 26.4 23.8 0 299 * O, T, V, A, R, C are as follows: O: Retractable control T: Outside compensation room temperature feedback control V: Using ventilation fan A: Using air conditioner R: Floor panel regardless of condensation Control cold water to maintain room temperature C: Mainly control dew condensation Control cold water from bottom panel supplied to control condensation generation * The total simulation time is 1104 hours. O + V + R: Retractable Control + Ventilation + Room Temperature O + V + C: Retractable Control + Ventilation + Condensation O + A + R: Retractable Control + Air Conditioner + Room Temperature O + A + C: Retractable Control + Air conditioner use + Condensation-driven T + V + R: Outside compensation room temperature feedback control + Ventilation + Room temperature T + V + C: Outside compensation room temperature feedback control + Ventilation + Condensation occurrence T + A + R: Outside compensation room temperature feedback control + Air Conditioning + Room Temperature T + A + C: Outside Compensation Room Temperature Feedback Control + Air Conditioning + Condensation Generation A: Air Conditioning Room Temperature Control

However, as shown in Table 3, condensation cannot be completely prevented when using a ventilation fan, and in some periods where condensation is likely to occur, the ventilation fan is continuously operated for several days or turned on / off very frequently. off), it will be difficult to control the occurrence of condensation in individual target spaces. In particular, when controlling the bottom panel mainly for dew condensation, cold water supplied to the bottom panel is stopped continuously in the case of the risk of dew condensation, and thus room temperature cannot be maintained comfortably.

When the retractable control is applied together with the ventilation fan, the control is focused on the occurrence of dew condensation (see Algorithm in Figure 15b), but the room temperature is greatly out of the set control range because the target space is maintained without the bottom radiation cooling for a certain period of time. Condensation time will be reduced. However, when the ambient compensation room temperature feedback control is applied together with the ventilation fan (see the algorithms of FIGS. 15e and 15f), condensation is not easily controlled because cold water is continuously supplied.

In addition, when ventilation is applied to the retractable control and controlled at room temperature (see the algorithm of FIG. 15a), the floor panel is opened and closed to maintain room temperature, so that the room temperature can be maintained, but condensation is hardly reduced. In this case, the use time of the ventilation fan is greatly increased, but condensation is not sufficiently controlled. In the case of applying ventilation to the retractable control and controlling the condensation prevention (see Algorithm of FIG. 15B), the floor panel is opened and closed according to the dew condensation, and condensation is greatly reduced. However, the room temperature has risen to about 30 ° C because no cooling is performed for some period of time.

Therefore, when controlled by ventilation, it was found that floor radiative cooling was impossible during the period when cooling is necessary because of high outside temperature.

If the floor panel is controlled around room temperature while dehumidifying the air conditioner in the open / closed control mode (see Algorithm in Figure 15c), the dehumidification operation of the air conditioner is usually operated only during the period when the floor radiant cooling is not possible, which greatly reduces the usage time of the entire air conditioner. . If the floor panel is controlled to prevent dew condensation while the air conditioner is dehumidified in the retractable control (refer to the algorithm in Fig. 15d), the room temperature is kept slightly high because the floor panel does not perform cooling properly in the area where condensation may occur. It is becoming. However, due to cooling by the dehumidification operation of the air conditioner, the temperature of the room does not rise higher than when ventilation is applied. In case of controlling the room temperature while controlling the room temperature feedback control while ventilating (refer to the algorithm of FIG. 15e), the dew condensation time is shorter than the open / close control under the same conditions, but cooling is not possible due to condensation during about 25% of the time. If the floor panel is controlled mainly to prevent dew condensation while ventilating to ambient temperature room temperature feedback control (see Algorithm in Fig. 15f), it is not applicable during the cooling period because it is difficult to maintain room temperature such as retractable control under the same conditions. When the air conditioner is dehumidified and the bottom panel is controlled at room temperature (see Fig. 15g Algorithm) and the condensation prevention control is used (see Fig. 15h Algorithm), use room temperature or floor surface temperature and air conditioner. There is a similar trend in time, which is judged to be due to the small change in the bottom surface temperature for the ambient compensation room temperature feedback control. If the air conditioner is controlled around room temperature, it is used about 30% of the cooling period, but if it is used for dehumidification purposes, it can be used only in some sections where condensation is concerned, and thus power consumption can be reduced during the cooling period.

Thus, the inventors have come to derive the most appropriate appropriate control method. Through the above simulation, it was found that the feedback control of the ambient air temperature was the best control performance for the room temperature and the floor surface temperature, and the above-described indoor humidity control simulation could prevent the dew condensation by the cooling and dehumidification using the existing air conditioner. there was. However, since the existing apartment houses use retractable valves for each household for heating, it is not necessary to apply the air conditioning room temperature feedback control method to control the dew condensation if air conditioning dehumidification is applied. Air conditioning cooling dehumidification "is applicable. However, by supplying the temperature of the supplied cold water according to the outside air and supplying differently from the center, the structure is cooled for most of the period during which the risk of condensation is low, and the high temperature cold water supply will be possible. In addition, since this method is applied to the existing district heating method, it is more economical since the heating equipment can be applied to cooling as it is being renovated.

Therefore, the sixth is to control high temperature cold water supply by cooling the structure for most of the period of low risk of condensation by compensating and supplying the temperature of cold water according to the outside air through air compensation control in cold heat source system. Or, the room temperature feedback on / off control and the previous five condensation prevention control methods were used in the room of the generation. As a control factor to simulate outside compensation + open / closed control, set room temperature, floor surface temperature, indoor humidity, and outside temperature, and the outside compensation rate is supplied according to outside air temperature according to the outside air temperature as shown in FIG. The room temperature was controlled by varying the temperature. As a result of the simultaneous application of “compensation + open / close control and air conditioning cooling and dehumidification” method, it is possible to reduce the fluctuation of the floor surface temperature as the supply cold water temperature changes, and use the floor panel for cooling up to 85% for the entire cooling period. Could. The cumulative operating time of the air conditioner is about 5 hours during the entire cooling period. Most of the dehumidification operation is performed at intervals of about 1.5 hours during periods where condensation is most likely.

The operation control method will be described with reference to FIG. 16, which is an algorithm of an operation control method for preventing condensation of the radiative cooling system of the present invention through "air compensation + opening / closing control + air conditioning cooling and dehumidification". In the control unit 430 of the floor ondol panel to control the temperature of the supply cold water to the outside compensation to perform a combination of the outdoor compensation room temperature feedback control and the retractable control and further operated the package air conditioner 435 installed indoors By controlling the indoor humidity, the detection unit 410 of the control system 400 measures the room temperature, the indoor humidity, the bottom surface temperature, the outside temperature, the outside air humidity, and executes a control algorithm in the calculation unit 420 In the operation control method for preventing condensation of the radiant cooling system using the floor ondol structure, characterized in that for operating the valve of the floor ondol panel with the operation unit 430, The control algorithm of the calculation unit 420 receives the measurement result of the detection unit 410 and receives the indoor temperature (Tin), the set temperature (Tset), the outside temperature (Tout), the room absolute humidity (Win), the bottom surface temperature (Ts). A first step of inputting condensation control safety factor (SR), room temperature control deviation (Diff), and cooling between displays (WasCooling); Determining a supply cold water temperature (Tw); A third step of checking whether to cool (WasCooling) between the exhibitions and selecting whether to wait or not; A fourth step of comparing the sum of the set temperature (Tset) and the room temperature control deviation (Diff) and the room temperature (Tin) when the full time cooling is selected in the third step; In the fourth step, when the sum of the set temperature Tset and the room temperature control deviation Diff is greater than the room temperature Tin, the difference between the set temperature Tset and the room temperature control deviation Diff and the room temperature Tin value. Comparing the fifth step; A sixth step of failing to cool the cooling of the next time when the difference between the set temperature Tset and the room temperature control deviation Diff is greater than the room temperature Tin in the fifth step; A seventh step of calculating Td); An eighth step of comparing the sum of the dew point temperature Td and the dew condensation control safety factor SR with the floor surface temperature Ts in the seventh step; A ninth step of selecting, if the sum of the dew point temperature Td and the dew condensation control safety factor SR is greater than the floor surface temperature Ts, air conditioner dehumidification (OnAirCon); And a tenth step of outputting a supply cold water temperature (Tw) value and an air conditioning dehumidification mode. In the third step, if WaCooling is not selected, the sum of the set temperature (Tset) and the room temperature control deviation (Diff) and the room temperature (Tin) are compared. Step 4-1, if the sum of Tset and room temperature control deviation Diff is greater than room temperature Tin, the process proceeds to step 6 of the twelfth aspect; In the third step, if WaCooling is not selected, the sum of the set temperature (Tset) and the room temperature control deviation (Diff) and the room temperature (Tin) are compared. If the sum of (Tset) and the room temperature control deviation (Diff) is less than the room temperature (Tin), select (True) the next time cooling (IsCooling), and proceed to step 7 of the above 12 step; In the fourth step, if the sum of the set temperature (Tset) and the room temperature control deviation (Diff) is less than the room temperature (Tin), the air conditioner dehumidification (OnAirCon) is selected (False) Step 5-1, which proceeds to the sixth step of 12; when the sum of the dew point temperature (Td) and the dew condensation control safety factor (SR) is less than the bottom surface temperature (Ts) in the eighth step, The bottom ondol structure characterized in that it comprises a; step 9-1 to the tenth step of claim 12 to operate the valve of the floor ondol panel with the operation unit 430 and to control the package air conditioner (435) Operation control method for condensation prevention of radiation cooling system.

As described above, the floor radiant cooling using the ondol can be applied in combination with an air system capable of controlling indoor humidity without affecting condensation and comfort at all. "Outward Compensation + Open Control + Air Conditioning Cooling Dehumidification" and "Open Control + Air Conditioning Cooling Dehumidification" were derived.

Figure 17 shows the configuration of the "opening control + air conditioning cooling dehumidification" system, the system configuration of "air compensation + opening control + air conditioning cooling dehumidification" is the same in the individual generation, cold water is passed through the mixing valve or heat exchanger You only have to supply differently from the center.

9 is a view showing a possible combination of the cooling heat source system of the radiative cooling system as an embodiment of the present invention. At present, the heating source method of the multi-family house applied in Korea can be divided into central type and individual type, and the central type is divided into heat source supply by district heating and central source boiler supply. Brief description of each feature is as follows.

Central heating supply by district heating supplies heavy hot water as fuel for cogeneration, waste incinerators, etc. in local districts. Centralized heat supply by centralized boilers produces steam, warm water and low temperature water from LNG (city gas supply area), LPG (installation of LPG storage tanks in the complex), and diesel oil, and generates heat exchanger and bleed. -in) and direct supply to each household, and the heat source supply by individual heating is LNG (city gas supply area) and LPG (installation of LPG storage tank in the complex) as fuel, and low temperature water in hot water boiler by generation. Produce and supply it. Cold heat source method compared to the heat source method is shown in Table 4.

In addition, the combination of the cooling heat source system for the application of the radiant cooling system to the existing heat source of the existing multi-family house among the cooling heat source system shown in Table 4 can be various as shown in FIG.

Table 4. Cold Heat Source Method

division Classification Characteristic Remarks Electric Driven Steam Compressor Screw, reciprocating, turbo Air-cooled, water-cooled Regenerative, Single Electric Driven Heat Pump Air heat source, water heat source - Solar and ground heat are also available Absorption Chiller Single utility, double utility - Direct absorption cold and hot water machine - - Gas Engine Driven Steam Compressor - Combined with steam boiler or hot water boiler Cogeneration system - total energy system Steam Turbine Driven Steam Compressor - Combined with steam boiler Engine driven chiller - Driven by an internal combustion engine

In the present invention, the cold heat source system 100 is configured to include a medium temperature water absorption type refrigerator and a heat exchanger to compensate for the temperature of the cold water to be supplied according to the outside air so as to perform an external air compensation control that is differently supplied from the center. Doing.

In particular, in centralized systems using district heating, medium temperature water absorption freezers and ice storage systems are preferred. However, in the case of using the existing hot water supply pipe and related equipment in the case of using the hot water absorption chiller in the plant for supplying the existing heat source, it is possible to configure the heat source system as shown in FIG.

Radiation cooling system using the floor ondol structure of the present invention and the operation control method for preventing the dew condensation of the radiation cooling system, the scattering of the dust generated when using the package air conditioner alone as a cooling device, the phenomenon occurs near the living area It can reduce the problems such as the noise of the machine, the national economic budget for the maximum power demand due to the temporary increase in the cooling demand in the summer.

In addition, as an operation control method for preventing the condensation of the radiation cooling system and the radiation cooling system using the floor ondol structure of the present invention, the existing ondol floor radiant heating heating system of the apartment house was not utilized in the summer, such idle equipment By reducing the initial investment cost for the cooling equipment, by controlling the indoor humidity by using the package air conditioner in the dehumidification mode, it is comfortable without condensation and can greatly reduce the power consumption, thereby achieving economic effects.

In addition, the radiation cooling system using the floor ondol structure of the present invention and the operation control method for preventing the dew condensation of the radiation cooling system, by controlling the temperature by radiant heat exchange can maintain the comfort of the occupants at high set temperature to save energy You can get the effect.

Claims (32)

By installing a heat insulating material on the concrete slab and forming a heat storage layer such as a gravel layer thereon, and using a hot floor heating structure to embed the hot water heating pipes in the upper portion of the heat storage layer and finish with cement mortar, Supplying cold water to the hot water heating pipe; A cold heat source system 100 for creating cold heat through a heat source; A real load processing system 200 for removing the load from the target space; A distribution system (300) for transferring cold heat to the actual load processing system located in the target space; And, Detecting dew point temperature or enthalpy by combining the results of the detection unit 410, the measurement unit 410 for measuring cooling determinants such as room temperature, room humidity, floor surface temperature, outside temperature, outside air humidity with a plurality of sensors Operation unit 420 for executing a control algorithm for determining cooling operation and whether there is a risk of dew condensation, and an operation unit for operating a valve of a floor ondol panel of the distribution system 300 according to a control algorithm of the operation unit 420 ( Control system 400 is configured to include, the control system 400 for controlling the operation of the distribution system 300 by maintaining the room temperature in the set temperature range and confirming the occurrence of condensation; In the radiative cooling system using a floor ondol structure comprising a, The operation of the radiant cooling system is controlled through the control system 400, and the control system 400 includes a detector 410, a calculator 420, and an operation unit 430. Cooling determinants such as temperature, indoor humidity, floor surface temperature, outside air temperature, and outside air humidity are measured by a plurality of sensors, and the calculation unit 420 combines the results of the measured detection unit 410 to calculate dew point temperature or enthalpy. Calculate and execute a control algorithm for determining cooling operation and whether there is a risk of condensation, and in the operation unit 430 operates the valve of the floor ondol panel of the distribution system 300 according to the result of the control algorithm of the operation unit 420. By controlling the operation of the distribution system 300 by maintaining room temperature in the set temperature range and confirming the occurrence of condensation, it is configured to include a medium temperature water absorption chiller and a heat exchanger to supply Floor of the cold air source system to compensate for the temperature of the cold water according to the outside air to perform the external compensation control by combining the operation control of the control system 400 and the air compensation control floor Operation control method for condensation prevention of radiation cooling system using ondol structure. The method of claim 1, wherein the cold heat source system 100 is configured to include a medium temperature water absorption chiller and a heat exchanger, to compensate for the temperature of the cold water to be supplied according to the outside air to perform the external compensation control to supply differently from the center Operation control method for condensation prevention of radiative cooling system using floor ondol structure. In claim 1, the operation unit 430 of the control system 400, in operating the valve of the floor ondol panel, characterized in that the floor ondol panel is operated through open-closed control or oil flow control or room temperature feedback outside air compensation control Operation control method for condensation prevention of radiative cooling system using floor ondol structure. The control method of claim 3, wherein the control of the operation unit 430 is to use the on / off valve installed in the private room for the existing heating as it is, and to use the cooling mode in addition to the existing controller for heating, the variable flow rate control It is used to replace the on / off valve installed in the room for conventional heating with a two-way control valve and to add a cooling mode to the existing heating controller, the room temperature feedback outside air compensation control is installed in the room for the existing heating Method for controlling condensation of the radiant cooling system using the floor ondol structure characterized in that the on / off valve is replaced with a three-way valve and used by adding a cooling mode to the existing heating controller. According to any one of claims 1 to 4, the operation unit 430 of the control system 400 in the operation of the valve of the floor ondol panel, further operating the ventilation fan or package air conditioner installed in the room to operate together. Operation control method for preventing condensation of the radiant cooling system using a floor ondol structure. By installing a heat insulating material on the concrete slab and forming a heat storage layer such as a gravel layer thereon, and using a hot floor heating structure to embed the hot water heating pipes in the upper portion of the heat storage layer and finish with cement mortar, Supplying cold water to the hot water heating pipe; A cold heat source system 100 for creating cold heat through a heat source; A real load processing system 200 for removing the load from the target space; A distribution system (300) for transferring cold heat to the actual load processing system located in the target space; And, Detecting dew point temperature or enthalpy by combining the results of the detection unit 410, the measurement unit 410 for measuring cooling determinants such as room temperature, room humidity, floor surface temperature, outside temperature, outside air humidity with a plurality of sensors Operation unit 420 for executing a control algorithm for determining cooling operation and whether there is a risk of dew condensation, and an operation unit for operating a valve of a floor ondol panel of the distribution system 300 according to a control algorithm of the operation unit 420 ( Control system 400 is configured to include, the control system 400 for controlling the operation of the distribution system 300 by maintaining the room temperature in the set temperature range and confirming the occurrence of condensation; In the radiative cooling system using a floor ondol structure comprising a, The operation of the radiant cooling system is controlled through the control system 400, and the control system 400 includes a detector 410, a calculator 420, and an operation unit 430. Cooling determinants such as temperature, indoor humidity, floor surface temperature, outside air temperature, and outside air humidity are measured by a plurality of sensors, and the calculation unit 420 combines the results of the measured detection unit 410 to calculate dew point temperature or enthalpy. Calculate and execute a control algorithm for determining cooling operation and whether there is a risk of condensation, and in the operation unit 430 operates the valve of the floor ondol panel of the distribution system 300 according to the result of the control algorithm of the operation unit 420. By controlling the operation of the distribution system 300 by maintaining room temperature in the set temperature range and confirming the occurrence of condensation, the detection unit 410 of the control system 400 measures the room temperature and the indoor humidity. And calculating the dew point temperature in the calculation unit 420 to compare the room temperature and the dew point temperature, and if the temperature difference between the dew point temperature and the room temperature is less than 2 to 3 ° C., the cooling stop mode and the room set temperature. By operating the control mode to determine whether cooling is performed by cooling or not, and the temperature difference between the dew point temperature and the room temperature is greater than 2 to 3 ° C., the control algorithm is executed by dividing the section into a cooling continuation mode to continue cooling. Operation control method for preventing condensation of the radiant cooling system using a floor ondol structure characterized in that to operate the valve of the floor ondol panel (430). The method of claim 6, wherein the cold heat source system 100 is configured to include a medium temperature water absorption chiller and a heat exchanger, to compensate for the temperature of the cold water to be supplied according to the outside air to perform an external compensation control to supply differently from the center Operation control method for condensation prevention of radiative cooling system using floor ondol structure. The method of claim 6, wherein the operation unit 430 of the control system 400, in operating the valve of the floor ondol panel, it is characterized in that the floor ondol panel is operated through open-closed control or oil flow control or room temperature feedback outside air compensation control Operation control method for condensation prevention of radiative cooling system using floor ondol structure. The method of claim 8, wherein the control of the operation unit 430 is characterized in that the on / off valve installed in the room for the existing heating as it is used as it is, and using the cooling mode in addition to the existing heating controller (controller), the variable flow rate control It is used to replace the on / off valve installed in the room for conventional heating with a two-way control valve and to add a cooling mode to the existing heating controller, the room temperature feedback outside air compensation control is installed in the room for the existing heating Method for controlling condensation of the radiant cooling system using the floor ondol structure characterized in that the on / off valve is replaced with a three-way valve and used by adding a cooling mode to the existing heating controller. 10. The method of any one of claims 6 to 9, wherein the operation unit 430 of the control system 400 in the operation of the valve of the floor ondol panel, further operating the ventilation fan or package air conditioner installed in the room to operate together. Operation control method for preventing condensation of the radiant cooling system using a floor ondol structure. By installing a heat insulating material on the concrete slab and forming a heat storage layer such as a gravel layer thereon, and using a hot floor heating structure to embed the hot water heating pipes in the upper portion of the heat storage layer and finish with cement mortar, Supplying cold water to the hot water heating pipe; A cold heat source system 100 for creating cold heat through a heat source; A real load processing system 200 for removing the load from the target space; A distribution system (300) for transferring cold heat to the actual load processing system located in the target space; And, Detecting dew point temperature or enthalpy by combining the results of the detection unit 410, the measurement unit 410 for measuring cooling determinants such as room temperature, room humidity, floor surface temperature, outside temperature, outside air humidity with a plurality of sensors Operation unit 420 for executing a control algorithm for determining cooling operation and whether there is a risk of dew condensation, and an operation unit for operating a valve of a floor ondol panel of the distribution system 300 according to a control algorithm of the operation unit 420 ( Control system 400 is configured to include, the control system 400 for controlling the operation of the distribution system 300 by maintaining the room temperature in the set temperature range and confirming the occurrence of condensation; In the radiative cooling system using a floor ondol structure comprising a, The operation of the radiant cooling system is controlled through the control system 400, and the control system 400 includes a detector 410, a calculator 420, and an operation unit 430. Cooling determinants such as temperature, indoor humidity, floor surface temperature, outside air temperature, and outside air humidity are measured by a plurality of sensors, and the calculation unit 420 combines the results of the measured detection unit 410 to calculate dew point temperature or enthalpy. Calculate and execute a control algorithm for determining cooling operation and whether there is a risk of condensation, and in the operation unit 430 operates the valve of the floor ondol panel of the distribution system 300 according to the result of the control algorithm of the operation unit 420. By controlling the operation of the distribution system 300 by maintaining room temperature in the set temperature range and confirming the occurrence of condensation, the operation unit 430 of the control system 400 controls the valve of the floor ondol panel. In order to control the indoor humidity by connecting the ventilation fan installed in the room further by operating the ventilation fan, the detection unit 410 of the control system 400 measures the outside air temperature, the outside air humidity, the operation unit 420 ), The indoor and outdoor enthalpy is calculated by comparing the indoor and outdoor enthalpy in the section where the indoor absolute humidity is greater than the outdoor absolute humidity. If it is not large, the condensation prevention of the radiant cooling system using the floor ondol structure characterized in that to operate the control algorithm to control the dividing into a stop mode to stop the ventilation fan to operate the control fan connected to the operation unit 430. Operation control method. The method of claim 11, wherein the cold heat source system 100 is configured to include a medium temperature water absorption type refrigerator and a heat exchanger, to compensate for the temperature of the cold water to be supplied according to the outside air to perform the external air compensation control to supply differently from the center Operation control method for condensation prevention of radiative cooling system using floor ondol structure. The method of claim 11, wherein the operation unit 430 of the control system 400, in operating the valve of the floor ondol panel, the floor ondol panel is operated through open-closed control or oil flow control or room temperature feedback outside air compensation control Operation control method for condensation prevention of radiative cooling system using floor ondol structure. The method of claim 13, wherein the control of the operation unit 430, the on / off valve installed in the private room for the existing heating as it is, and using the cooling mode in addition to the existing heating controller (controller), the variable flow rate control It is used to replace the on / off valve installed in the room for conventional heating with a two-way control valve and to add a cooling mode to the existing heating controller, the room temperature feedback outside air compensation control is installed in the room for the existing heating Method for controlling condensation of the radiant cooling system using the floor ondol structure characterized in that the on / off valve is replaced with a three-way valve and used by adding a cooling mode to the existing heating controller. 15. The method of any one of claims 11 to 14, wherein the operation unit 430 of the control system 400 in the operation of the valve of the floor ondol panel, further operating the ventilation fan or package air conditioner installed in the room to operate together. Operation control method for preventing condensation of the radiant cooling system using a floor ondol structure. By installing a heat insulating material on the concrete slab and forming a heat storage layer such as a gravel layer thereon, and using a hot floor heating structure to embed the hot water heating pipes in the upper portion of the heat storage layer and finish with cement mortar, Supplying cold water to the hot water heating pipe; A cold heat source system 100 for creating cold heat through a heat source; A real load processing system 200 for removing the load from the target space; A distribution system (300) for transferring cold heat to the actual load processing system located in the target space; And, Detecting dew point temperature or enthalpy by combining the results of the detection unit 410, the measurement unit 410 for measuring cooling determinants such as room temperature, room humidity, floor surface temperature, outside temperature, outside air humidity with a plurality of sensors Operation unit 420 for executing a control algorithm for determining cooling operation and whether there is a risk of dew condensation, and an operation unit for operating a valve of a floor ondol panel of the distribution system 300 according to a control algorithm of the operation unit 420 ( Control system 400 is configured to include, the control system 400 for controlling the operation of the distribution system 300 by maintaining the room temperature in the set temperature range and confirming the occurrence of condensation; In the radiative cooling system using a floor ondol structure comprising a, The operation of the radiant cooling system is controlled through the control system 400, and the control system 400 includes a detector 410, a calculator 420, and an operation unit 430. Cooling determinants such as temperature, indoor humidity, floor surface temperature, outside air temperature, and outside air humidity are measured by a plurality of sensors, and the calculation unit 420 combines the results of the measured detection unit 410 to calculate dew point temperature or enthalpy. Calculate and execute a control algorithm for determining cooling operation and whether there is a risk of condensation, and in the operation unit 430 operates the valve of the floor ondol panel of the distribution system 300 according to the result of the control algorithm of the operation unit 420. By controlling the operation of the distribution system 300 by maintaining room temperature in the set temperature range and confirming the occurrence of condensation, the operation unit 430 of the control system 400 controls the valve of the floor ondol panel. In order to control the indoor humidity by further operating the package air conditioner connected to the package air conditioner installed in the room, the detection unit 410 of the control system 400 indoor temperature, indoor humidity, floor surface temperature, outside air temperature, Measures the outside humidity and executes a control algorithm in the operation unit 420 to operate the valve of the floor ondol panel with the operation unit 430, the operation control for preventing condensation of the radiant cooling system using the floor ondol structure Way. The method of claim 16, wherein the cold heat source system 100 is configured to include a medium temperature water absorption chiller and a heat exchanger, to compensate for the temperature of the cold water to be supplied according to the outside air to perform an external compensation control to supply differently from the center Operation control method for condensation prevention of radiative cooling system using floor ondol structure. The method of claim 16, wherein the operation unit 430 of the control system 400, in operating the valve of the floor ondol panel, it is characterized in that the floor ondol panel is operated through the open-close control or the oil flow control or room temperature feedback outside air compensation control Operation control method for condensation prevention of radiative cooling system using floor ondol structure. 19. The method of claim 18, wherein the control of the operation unit 430, the on / off valve installed in the private room for the existing heating as it is, and using the cooling mode in addition to the existing controller for heating (control), the variable flow rate control It is used to replace the on / off valve installed in the room for conventional heating with a two-way control valve and to add a cooling mode to the existing heating controller, the room temperature feedback outside air compensation control is installed in the room for the existing heating Method for controlling condensation of the radiant cooling system using the floor ondol structure characterized in that the on / off valve is replaced with a three-way valve and used by adding a cooling mode to the existing heating controller. 20. The method of any one of claims 16 to 19, wherein the operation unit 430 of the control system 400 in the operation of the valve of the floor ondol panel, further operating the ventilation fan or package air conditioner installed in the room to operate together. Operation control method for preventing condensation of the radiant cooling system using a floor ondol structure. 20. The method of any one of claims 16 to 19, wherein the operation control method In the control unit 430 of the control system 400 to control the valve of the floor ondol panel, a combination of the outdoor compensation room temperature feedback control and the open / close control that controls the temperature of the supply cold water to the external compensation is carried out. By further controlling the indoor humidity, the detection unit 410 of the control system 400 measures the room temperature, the indoor humidity, the bottom surface temperature, the outside temperature, the outside air humidity, the control unit 420 in the control algorithm Operating control method for preventing condensation of the radiant cooling system using the floor ondol structure, characterized in that for operating the valve of the floor ondol panel by the operation unit (430). The method of claim 20, wherein the operation control method In the control unit 430 of the control system 400 to control the valve of the floor ondol panel, a combination of the outdoor compensation room temperature feedback control and the open / close control that controls the temperature of the supply cold water to the external compensation is carried out. By further controlling the indoor humidity, the detection unit 410 of the control system 400 measures the room temperature, the indoor humidity, the bottom surface temperature, the outside temperature, the outside air humidity, the control unit 420 in the control algorithm Operating control method for preventing condensation of the radiant cooling system using the floor ondol structure, characterized in that for operating the valve of the floor ondol panel by the operation unit (430). The control algorithm of the calculating unit 420 is By receiving the measurement result of the detection unit 410, the indoor temperature (Tin), the set temperature (Tset), the outside temperature (Tout), the room absolute humidity (Win), the bottom surface temperature (Ts), the dew condensation control safety factor (SR), A first step of inputting room temperature control deviation (Diff) and cooling (WasCooling) between displays; Determining a supply cold water temperature (Tw); A third step of checking whether to cool (WasCooling) between the exhibitions and selecting whether to wait or not; A fourth step of comparing the sum of the set temperature (Tset) and the room temperature control deviation (Diff) and the room temperature (Tin) when the full time cooling is selected in the third step; In the fourth step, when the sum of the set temperature Tset and the room temperature control deviation Diff is greater than the room temperature Tin, the difference between the set temperature Tset and the room temperature control deviation Diff and the room temperature Tin value. Comparing the fifth step; A sixth step of failing to cool the cooling of the next time when the difference between the set temperature Tset and the room temperature control deviation Diff is greater than the room temperature Tin in the fifth step; A seventh step of calculating the dew point temperature Td; An eighth step of comparing the sum of the dew point temperature Td and the dew condensation control safety factor SR with the floor surface temperature Ts in the seventh step; A ninth step of selecting, if the sum of the dew point temperature Td and the dew condensation control safety factor SR is greater than the floor surface temperature Ts, air conditioner dehumidification (OnAirCon); And, A tenth step of outputting a supply chilled water temperature (Tw) value and an air conditioning dehumidification mode; The operation control method for preventing condensation of a radiant cooling system using a floor ondol structure characterized in that it comprises a control unit 430 to operate the valve of the floor ondol panel and control the package air conditioner. The control algorithm of the calculating unit 420 is By receiving the measurement result of the detection unit 410, the indoor temperature (Tin), the set temperature (Tset), the outside temperature (Tout), the room absolute humidity (Win), the bottom surface temperature (Ts), the dew condensation control safety factor (SR), A first step of inputting room temperature control deviation (Diff) and cooling (WasCooling) between displays; Determining a supply cold water temperature (Tw); A third step of checking whether to cool (WasCooling) between the exhibitions and selecting whether to wait or not; A fourth step of comparing the sum of the set temperature (Tset) and the room temperature control deviation (Diff) and the room temperature (Tin) when the full time cooling is selected in the third step; In the fourth step, when the sum of the set temperature Tset and the room temperature control deviation Diff is greater than the room temperature Tin, the difference between the set temperature Tset and the room temperature control deviation Diff and the room temperature Tin value. Comparing the fifth step; A sixth step of failing to cool the cooling of the next time when the difference between the set temperature Tset and the room temperature control deviation Diff is greater than the room temperature Tin in the fifth step; A seventh step of calculating the dew point temperature Td; An eighth step of comparing the sum of the dew point temperature Td and the dew condensation control safety factor SR with the floor surface temperature Ts in the seventh step; A ninth step of selecting, if the sum of the dew point temperature Td and the dew condensation control safety factor SR is greater than the floor surface temperature Ts, air conditioner dehumidification (OnAirCon); And, A tenth step of outputting a supply chilled water temperature (Tw) value and an air conditioning dehumidification mode; The operation control method for preventing condensation of a radiant cooling system using a floor ondol structure characterized in that it comprises a control unit 430 to operate the valve of the floor ondol panel and control the package air conditioner. The method of claim 23, wherein the operation control method In the case where the WasCooling is not selected in the third step, the sum of the set temperature (Tset) and the room temperature control deviation (Diff) and the room temperature (Tin) are compared, and the set temperature (Tset) and the room temperature control are compared. Step 4-1 when the sum of the deviations Diff is greater than the room temperature Tin, the process proceeds to the sixth step of the twelfth step; The operation control method for preventing condensation of a radiant cooling system using a floor ondol structure characterized in that it comprises a control unit 430 to operate the valve of the floor ondol panel and control the package air conditioner. The method of claim 24, wherein the operation control method In the case where the WasCooling is not selected in the third step, the sum of the set temperature (Tset) and the room temperature control deviation (Diff) and the room temperature (Tin) are compared, and the set temperature (Tset) and the room temperature control are compared. Step 4-1 when the sum of the deviations Diff is greater than the room temperature Tin, the process proceeds to the sixth step of the twelfth step; The operation control method for preventing condensation of a radiant cooling system using a floor ondol structure characterized in that it comprises a control unit 430 to operate the valve of the floor ondol panel and control the package air conditioner. The method of claim 23, wherein the operation control method In the case where the WasCooling is not selected in the third step, the sum of the set temperature (Tset) and the room temperature control deviation (Diff) and the room temperature (Tin) are compared, and the set temperature (Tset) and the room temperature control are compared. Step 4-2, if the sum of the deviations Diff is less than the room temperature Tin, selects True cooling next time and proceeds to the seventh step of claim 12; The operation control method for preventing condensation of a radiant cooling system using a floor ondol structure characterized in that it comprises a control unit 430 to operate the valve of the floor ondol panel and control the package air conditioner. The method of claim 24, wherein the operation control method In the case where the WasCooling is not selected in the third step, the sum of the set temperature (Tset) and the room temperature control deviation (Diff) and the room temperature (Tin) are compared, and the set temperature (Tset) and the room temperature control are compared. Step 4-2, if the sum of the deviations Diff is less than the room temperature Tin, selects True cooling next time and proceeds to the seventh step of claim 12; The operation control method for preventing condensation of a radiant cooling system using a floor ondol structure characterized in that it comprises a control unit 430 to operate the valve of the floor ondol panel and control the package air conditioner. The method of claim 23, wherein the operation control method If the sum of the set temperature (Tset) and the room temperature control deviation (Diff) in the fourth step is less than the room temperature (Tin), the air-conditioning dehumidification (OnAirCon) is selected (False) and the sixth step of claim 12 Step 5-1; The operation control method for preventing condensation of a radiant cooling system using a floor ondol structure characterized in that it comprises a control unit 430 to operate the valve of the floor ondol panel and control the package air conditioner. The method of claim 24, wherein the operation control method If the sum of the set temperature (Tset) and the room temperature control deviation (Diff) in the fourth step is less than the room temperature (Tin), the air-conditioning dehumidification (OnAirCon) is selected (False) and the sixth step of claim 12 Step 5-1; The operation control method for preventing condensation of a radiant cooling system using a floor ondol structure characterized in that it comprises a control unit 430 to operate the valve of the floor ondol panel and control the package air conditioner. The method of claim 23, wherein the operation control method Step 9-1, when the sum of the dew point temperature Td and the dew condensation control safety factor SR is less than the bottom surface temperature Ts in the eighth step, the method proceeds to the tenth step of the 12th step; The operation control method for preventing condensation of a radiant cooling system using a floor ondol structure characterized in that it comprises a control unit 430 to operate the valve of the floor ondol panel and control the package air conditioner. The method of claim 24, wherein the operation control method Step 9-1, when the sum of the dew point temperature Td and the dew condensation control safety factor SR is less than the bottom surface temperature Ts in the eighth step, the method proceeds to the tenth step of the 12th step; The operation control method for preventing condensation of a radiant cooling system using a floor ondol structure characterized in that it comprises a control unit 430 to operate the valve of the floor ondol panel and control the package air conditioner.