KR102507123B1 - Heating, cooling and hot-water system using pvt and air source heat pump, and operation method of the same - Google Patents

Abstract

Various embodiments of the present invention provide a system for heating, cooling, and hot water simultaneously using photovoltaic heat and air heat and an operating method thereof. According to various embodiments of the present invention, the system for heating, cooling, and hot water comprises: a photovoltaic heat module configured to collect thermal energy from sunlight; an air heat source heat pump configured to collect thermal energy from air; a first heat storage tank configured to store thermal energy supplied from the photovoltaic heat module; and a second heat storage tank configured to store thermal energy supplied from at least one between the photovoltaic heat module and the air heat source heat pump. Hot water is provided by using the thermal energy stored in the first heat storage tank, and heating or cooling is provided for indoor space by using the thermal energy stored in the second heat storage tank.

Description

Air conditioning and heating and hot water supply system using solar heat and air heat at the same time and its operation method

Various embodiments relate to a heating/cooling and hot water system using photovoltaic thermal (PVT) and air heat at the same time, and an operating method thereof.

In general, solar thermal modules convert sunlight into electrical energy and thermal energy. For this reason, recently, photovoltaic modules have been applied to facilities for hot water supply or heating. However, since the photovoltaic module does not respond to cooling, a separate facility for cooling is required. For this reason, a technology using a photovoltaic module and a geothermal heat pump or an air heat pump together has been studied, but the capacity design method is ambiguous and has not been put to practical use. In addition, since winter freezing of solar modules, excessive design, failure to cope with heating and cooling loads, etc. must be considered, it is difficult to put them into practical use.

Various embodiments provide a cooling/heating and hot water supply system using solar heat and air heat at the same time, and an operation method thereof.

A heating/cooling and hot water supply system according to various embodiments includes a photovoltaic module configured to collect thermal energy from sunlight, an air source heat pump configured to collect thermal energy from air, and heat energy supplied from the photovoltaic module. A first thermal storage tank configured to store, a second thermal storage tank configured to store thermal energy supplied from at least one of the photovoltaic module or the air source heat pump, and using the thermal energy stored in the first thermal storage tank , a controller configured to provide hot water and to provide heating or cooling to the room by using the thermal energy stored in the second heat storage tank.

An operating method of a heating/cooling and domestic hot water system according to various embodiments of the present disclosure includes: executing heating period operation for hot water supply and heating by using the first heat storage tank and the second heat storage tank in a heating period; , performing a cooling period operation for hot water supply and cooling by using the first heat storage tank and the second heat storage tank.

According to various embodiments, the heating/cooling and domestic hot water system may separately provide a heat storage tank for hot water supply and a heat storage tank for cooling/heating, thereby providing both cooling, heating, and domestic hot water using a photovoltaic module and an air source heat pump. That is, in the heating/cooling and hot water supply system, hot water is provided using the photovoltaic module during the heating period, heating is provided using the photovoltaic module and the air source heat pump, and hot water is supplied using the photovoltaic module during the cooling period. It is possible to provide cooling by using an air source heat pump. In addition, the cooling/heating and hot water supply system may perform freeze protection operation in winter and overheat protection operation in summer for the photovoltaic module. Accordingly, the heating/cooling and domestic hot water system can effectively provide cooling, heating, and domestic hot water using the two heat storage tanks, the photovoltaic module, and the air source heat pump.

1 is a diagram schematically illustrating a cooling/heating and hot water supply system according to various embodiments.
2 is a diagram exemplarily illustrating a cooling/heating and hot water supply system according to various embodiments.
3 is a diagram schematically illustrating an operating method of a heating/cooling and hot water supply system according to various embodiments.
FIG. 4 is a diagram showing the heating period operation of FIG. 3 in detail.
FIG. 5 is a view for explaining a step of executing a heating operation using the second heat storage tank of FIG. 4 .
FIG. 6 is a view for explaining a step of performing a heat storage operation on a second heat storage tank using the air source heat pump of FIG. 4 .
FIG. 7 is a view for explaining a step of performing a heat storage operation on a first heat storage tank using the photovoltaic module of FIG. 4 .
FIG. 8 is a view for explaining a step of performing a heat storage operation on a second heat storage tank using the photovoltaic module of FIG. 4 .
FIG. 9 is a diagram illustrating in detail freeze prevention operation of the photovoltaic module of FIG. 3 .
10 is a view for explaining the step of circulating the outlet water of the photovoltaic module of FIG. 9 .
FIG. 11 is a diagram showing the cooling period operation of FIG. 3 in detail.
FIG. 12 is a diagram for explaining a step of performing a cooling operation using the second heat storage tank of FIG. 11 .
FIG. 13 is a view for explaining a step of performing a cooling storage operation on the second thermal storage tank using the air source heat pump of FIG. 11 .
FIG. 14 is a view for explaining a step of performing a heat storage operation on a first heat storage tank using the photovoltaic module of FIG. 11 .
FIG. 15 is a view showing in detail an overheat prevention operation of the photovoltaic module of FIG. 3 .
FIG. 16 is a view for explaining the step of exchanging the stored water in the first heat storage tank of FIG. 15 .

Hereinafter, various embodiments of this document will be described with reference to the accompanying drawings.

1 is a diagram schematically illustrating a heating, cooling and hot water system 100 according to various embodiments. 2 is a diagram exemplarily illustrating a heating, cooling and hot water system 100 according to various embodiments.

1 and 2, the heating and cooling and hot water supply system 100 includes a photovoltaic module (PVT module) 110, an air-to-water heat pump 120, a first heat storage tank ( A storage tank 130, a second heat storage tank 140, a fan coil unit 150, and a controller 160 may be included.

The solar thermal module 110 may be provided to convert sunlight into thermal energy and electrical energy. At this time, the photovoltaic module 110 may be provided to collect thermal energy from sunlight. To this end, the photovoltaic module 110 may be installed, for example, on a roof or wall of a building, or on a flat surface. Then, the photovoltaic module 110 may supply thermal energy to at least one of the first heat storage tank 130 or the second heat storage tank 140 . Here, the photovoltaic module 110 may supply heat energy to at least one of the first heat storage tank 130 and the second heat storage tank 140 according to the water outlet temperature T _PVT . Specifically, when the water outlet temperature (T _PVT ) of the photovoltaic module 110 is equal to or greater than the set temperature (T _DHW ) of the first heat storage tank 130, the photovoltaic module 110 heats the first heat storage tank 130. can supply energy. For example, the set temperature (T _DHW ) of the first heat storage tank 130 may be about 60 °C. On the other hand, the water outlet temperature (T _PVT ) of the photovoltaic module 110 is less than the set temperature (T _DHW ) of the first heat storage tank 130 and exceeds the heating set temperature (T _HST ) of the second heat storage tank 140 In this case, the photovoltaic module 110 may supply thermal energy to the second heat storage tank 140 . For example, the heating set temperature (T _HST ) of the second heat storage tank 140 may be about 45 °C.

The air source heat pump 120 may be provided to collect thermal energy from air. In this case, the air source heat pump 120 may convert low-temperature thermal energy into high-temperature thermal energy or convert high-temperature thermal energy into low-temperature thermal energy. Also, the air heat source heat pump 120 may supply heat energy to the second heat storage tank 140 . Specifically, in the heating period, when the second heat storage tank 140 does not satisfy the heating operation condition, the air source heat pump 120 may supply high-temperature thermal energy to the second heat storage tank 140 . Meanwhile, in the cooling period, when the second heat storage tank 140 does not satisfy the cooling operation condition, the air source heat pump 120 may supply low-temperature thermal energy to the second heat storage tank 140 .

The first heat storage tank 130 may serve as a heat storage tank for hot water supply. To this end, the first heat storage tank 130 may store thermal energy. At this time, the first heat storage tank 130 may store thermal energy supplied from the photovoltaic module 110 . Here, the first heat storage tank 130 may store thermal energy equal to or higher than the set temperature (T _DHW ). For example, the set temperature (T _DHW ) of the first heat storage tank 130 may be about 60 °C. That is, when the water outlet temperature (T _PVT ) of the photovoltaic module 110 is equal to or greater than the set temperature (T _DHW ) of the first heat storage tank 130, the first heat storage tank 130 is supplied from the photovoltaic module 110. Can store thermal energy. Also, the first heat storage tank 130 may heat the incoming low-temperature water to high-temperature water using the stored thermal energy to provide the high-temperature water.

The second heat storage tank 140 may serve as a heat storage tank for cooling and heating. To this end, the second heat storage tank 140 may store thermal energy. Specifically, the second thermal storage tank 140 may store high-temperature thermal energy as a thermal storage tank for heating during a heating period and store low-temperature thermal energy as a cooling storage tank during a cooling period. In this case, the second heat storage tank 140 may store thermal energy supplied from at least one of the photovoltaic module 110 and the air source heat pump 120 . Also, the second heat storage tank 140 may provide the stored thermal energy to the fan coil unit 150 for heating and cooling.

Specifically, during the heating period, when the indoor temperature (T _indoor ) is lower than the minimum critical temperature (α _indoorL ), the second heat storage tank 140 may provide stored thermal energy to the fan coil unit 150 . For example, the lowest critical temperature (α _indoorL ) may be about 22 °C. At this time, the second heat storage tank 140 may provide the stored heat energy to the fan coil unit 150 only when the second heat storage tank 140 satisfies the heating operation condition. Meanwhile, even if the indoor temperature (T _indoor ) is lower than the minimum critical temperature (α _indoorL ), when the second heat storage tank 140 does not satisfy the heating operation condition, the second heat storage tank 140 uses the stored thermal energy It may not be provided to the fan coil unit 150. In this case, the second thermal storage tank 140 may store thermal energy supplied from the air source heat pump 120 . In addition, during the heating period, when the water outlet temperature (T _PVT ) of the photovoltaic module 110 exceeds the heating set temperature (T _HST ) of the second thermal storage tank 140, the second thermal storage tank 140 provides solar heat Thermal energy supplied from the module 110 may be stored.

Meanwhile, in the cooling period, when the indoor temperature (T _indoor ) is higher than the highest critical temperature (α _indoorH ), the second heat storage tank 140 may provide the stored thermal energy to the fan coil unit 150 . For example, the highest critical temperature (α _indoorH ) may be about 25 °C. At this time, the second heat storage tank 140 may provide the stored thermal energy to the fan coil unit 150 only when the second heat storage tank 140 satisfies the cooling operation condition. Meanwhile, even if the indoor temperature (T _indoor ) is higher than the maximum critical temperature (α _indoorH ), when the second heat storage tank 140 does not satisfy the cooling operation condition, the second heat storage tank 140 uses stored thermal energy. It may not be provided to the fan coil unit 150. In this case, the second thermal storage tank 140 may store thermal energy supplied from the air source heat pump 120 . Here, the second heat storage tank 140 may store heat energy equal to or higher than the heating set temperature T _HST . For example, the heating set temperature (T _HST ) of the second heat storage tank 140 may be about 45 °C.

The fan coil unit 150 may be configured to provide heating and cooling to a room. Specifically, during the heating period, the fan coil unit 150 may provide heating to the room by using thermal energy provided from the second heat storage tank 140 . Here, the fan coil unit 150 may heat indoor air by using thermal energy provided from the second heat storage tank 140 . Meanwhile, during the cooling period, the fan coil unit 150 may provide cooling to the room by using thermal energy provided from the second heat storage tank 140 . Here, the fan coil unit 150 may cool indoor air by using thermal energy provided from the second heat storage tank 140 . Here, the second thermal storage tank 140 may store thermal energy equal to or less than the cooling set temperature (T _CST ). For example, the cooling set temperature (T _CST ) of the second heat storage tank 140 may be about 10 °C.

The controller 160 may control at least one of the photovoltaic module 110, the air source heat pump 120, the first heat storage tank 130, the second heat storage tank 140, or the fan coil unit 150. there is. Through this, the controller 160 may execute the heating period operation and the freeze prevention operation of the photovoltaic module 110 during the heating period. At this time, the controller 160 may perform a heating operation using the second heat storage tank 140 and perform a heat storage operation on at least one of the first heat storage tank 130 and the second heat storage tank 140. . In addition, the controller 160 may execute the freeze prevention operation by automatically circulating water outlet of the photovoltaic module 110 based on the outdoor temperature. In addition, the controller 160 may execute the cooling period operation and the overheating prevention operation of the photovoltaic module 110 during the cooling period. At this time, the controller 160 performs a cooling operation using the second thermal storage tank 140, performs a thermal storage operation with respect to the first thermal storage tank 130, and performs a cooling operation with respect to the second thermal storage tank 140. can run Then, the controller 160 may execute an overheat prevention operation by exchanging the stored water in the first heat storage tank 130 based on the water outlet temperature T _PVT of the photovoltaic module 110 . The controller 160 may include a processor, a memory, various sensors, and a plurality of control devices. For example, the sensors may include a temperature sensor (T), a flow meter (F), an electricity meter (P), a pyranometer (S), and the like. For example, the regulating devices may include at least one circulation pump, at least one valve, and the like.

FIG. 3 is a diagram schematically illustrating an operating method of a heating/cooling and hot water supply system 100 according to various embodiments.

Referring to FIG. 3 , the heating/cooling and hot water supply system 100 may detect a heating period in step 310 and execute a heating period operation and a freeze prevention operation of the photovoltaic module 110 in step 320 . At this time, the controller 160 may perform a heating operation using the second heat storage tank 140 and perform a heat storage operation on at least one of the first heat storage tank 130 and the second heat storage tank 140. . In addition, the controller 160 may execute the freeze prevention operation by automatically circulating water outlet of the photovoltaic module 110 based on the outdoor temperature.

Meanwhile, the heating/cooling and hot water supply system 100 may detect a cooling period in step 330 and execute a cooling period operation and an overheating prevention operation of the photovoltaic module 110 in step 340 . At this time, the controller 160 performs a cooling operation using the second thermal storage tank 140, performs a thermal storage operation with respect to the first thermal storage tank 130, and performs a cooling operation with respect to the second thermal storage tank 140. can run Then, the controller 160 may execute an overheat prevention operation by exchanging the stored water in the first heat storage tank 130 based on the water outlet temperature T _PVT of the photovoltaic module 110 .

FIG. 4 is a diagram showing in detail the heating period operation (step 320) of FIG. 3 . FIG. 5 is a diagram for explaining a step (step 430) of executing a heating operation using the second heat storage tank 140 of FIG. 4 . FIG. 6 is a view for explaining a step (step 440 ) of performing a heat storage operation on the second heat storage tank 140 using the air source heat pump 120 of FIG. 4 . FIG. 7 is a diagram for explaining a step (step 460) of performing a heat storage operation on the first heat storage tank 130 using the photovoltaic module 110 of FIG. 4 . FIG. 8 is a diagram for explaining a step (step 480) of performing a heat storage operation on the second heat storage tank 140 using the photovoltaic module 110 of FIG. 4 .

Referring to FIG. 4 , during the heating period, in step 410 , the controller 160 may determine whether the indoor temperature (T _indoor ) is lower than the minimum critical temperature (α _indoorL ). For example, the lowest critical temperature (α _indoorL ) may be about 22 °C.

In step 410, if the indoor temperature (T _indoor ) is lower than the minimum critical temperature (α _indoorL ), the controller 160 may determine whether the second heat storage tank 140 satisfies the heating operation condition in step 420. there is. Here, the controller 160 may determine whether the internal temperature (T _ST ) of the second heat storage tank 140 is equal to or higher than the heatable temperature (α _HST ). For example, the heatable temperature (α _HST ) may be about 43 °C. And, if the internal temperature (T _ST ) of the second heat storage tank 140 is equal to or higher than the heating possible temperature (α _HST ), the controller 160 may determine that the second heat storage tank 140 satisfies the heating operation condition. there is. On the other hand, when the internal temperature (T _ST ) of the second heat storage tank 140 is less than the heating possible temperature (α _HST ), the controller 160 determines that the second heat storage tank 140 does not satisfy the heating operation condition. can

In step 420, if it is determined that the second heat storage tank 140 satisfies the heating operation condition, the controller 160 may execute the heating operation using the second heat storage tank 140 in step 430. At this time, the second heat storage tank 140 may provide stored thermal energy to the fan coil unit 150 as shown in FIG. 5 . Through this, the fan coil unit 150 can provide heating to the room by using the heat energy provided from the second heat storage tank 140 . Here, the fan coil unit 150 may heat indoor air by using thermal energy provided from the second heat storage tank 140 .

Meanwhile, in step 420, when it is determined that the second heat storage tank 140 does not satisfy the heating operation condition, the controller 160 uses the air heat source heat pump 120 to control the second heat storage tank 140 in step 440. ), thermal storage operation can be performed. At this time, even if the indoor temperature (T _indoor ) is lower than the minimum critical temperature (α _indoorL ), when the second heat storage tank 140 does not satisfy the heating operation condition, the second heat storage tank 140 stores thermal energy may not be provided to the fan coil unit 150. And, as shown in FIG. 6 , the second heat storage tank 140 may store thermal energy supplied from the air source heat pump 120 . Here, the second heat storage tank 140 may store heat energy equal to or higher than the heating set temperature T _HST . For example, the heating set temperature (T _HST ) of the second heat storage tank 140 may be about 45 °C.

In addition, the controller 160 in step 450, the water outlet temperature (T _PVT ) of the photovoltaic module 110 may determine whether or not the set temperature (T _DHW ) of the first heat storage tank 130 or more. For example, the set temperature (T _DHW ) of the first heat storage tank 130 may be about 60 °C.

In step 450, if the water outlet temperature (T _PVT ) of the photovoltaic module 110 is equal to or greater than the set temperature (T _DHW ) of the first heat storage tank 130, the controller 160, in step 460, the photovoltaic module 110 A heat storage operation may be performed on the first heat storage tank 130 by using. At this time, the first heat storage tank 130, as shown in Figure 7, can store the heat energy supplied from the photovoltaic module 110. Through this, the first thermal storage tank 130 may heat the incoming low-temperature water to high-temperature water using the stored thermal energy, thereby providing the high-temperature water.

On the other hand, in step 450, if the water outlet temperature (T _PVT ) of the photovoltaic module 110 is less than the set temperature (T _DHW ) of the first heat storage tank 130, the controller 160 in step 470, the photovoltaic module ( It may be determined whether the water outlet temperature (T _PVT ) of 110) exceeds the heating set temperature (T _HST ) of the second heat storage tank 140 . For example, the heating set temperature (T _HST ) of the second heat storage tank 140 may be about 45 °C.

In step 470, when the water outlet temperature (T _PVT ) of the photovoltaic module 110 exceeds the heating set temperature (T _HST ) of the second heat storage tank 140, the controller 160 controls the photovoltaic module 110 in step 480. ) may be used to perform a heat storage operation on the second heat storage tank 140 . At this time, the second heat storage tank 140, as shown in Figure 8, can store the heat energy supplied from the photovoltaic module 110. That is, the water outlet temperature (T _PVT ) of the solar thermal module 110 is less than the set temperature (T _DHW ) of the first heat storage tank 130 and exceeds the heating set temperature (T _HST ) of the second heat storage tank 140 In the case of, it is possible to store the thermal energy supplied from the photovoltaic module (110). Through this, the second heat storage tank 140 may store heat energy equal to or higher than the heating set temperature T _HST .

FIG. 9 is a diagram showing in detail the freeze prevention operation (step 320) of the photovoltaic module 110 of FIG. 3 . FIG. 10 is a view for explaining the step (step 920) of circulating the outlet water of the photovoltaic module 110 of FIG.

Referring to FIG. 9 , during the heating period, in step 910 , the controller 160 may determine whether the outdoor temperature (T _outdoor ) is lower than the threshold temperature (α _outdoor ). For example, the critical temperature (α _outdoor ) may be about -5 °C.

In step 910, if the outdoor temperature (T _outdoor ) is lower than the threshold temperature (α _outdoor ), the controller 160 may cycle the water outlet of the photovoltaic module 110 in step 920. At this time, the controller 160, as shown in Figure 10, can circulate the water outlet of the photovoltaic module 110 between the photovoltaic module 110 and the first heat storage tank (130).

In step 930 , the controller 160 may determine whether or not the water outlet temperature T _PVT of the photovoltaic module 110 is greater than or equal to the reference temperature α _PVT . For example, the reference temperature (α _PVT ) may be about 5 °C.

In step 930, if the water outlet temperature (T _PVT ) of the photovoltaic module 110 is less than the reference temperature (α _PVT ), the controller 160 may return to step 920. Through this, until the water outlet temperature (T _PVT ) of the photovoltaic module 110 is greater than or equal to the reference temperature (α _PVT ), the controller 160 may continuously circulate the water outlet of the photovoltaic module 110 .

On the other hand, in step 930, if the water outlet temperature (T _PVT ) of the photovoltaic module 110 is equal to or greater than the reference temperature (α _PVT ), the controller 160 may not circulate the water outlet of the photovoltaic module 110 any longer. .

FIG. 11 is a diagram showing the cooling period operation (step 340) of FIG. 3 in detail. FIG. 12 is a diagram for explaining a step (step 1130) of performing a cooling operation using the second heat storage tank 140 of FIG. 11 . FIG. 13 is a diagram for explaining a step (step 1140) of performing a cooling storage operation on the second thermal storage tank 140 using the air source heat pump 120 of FIG. 11 . FIG. 14 is a diagram for explaining a step (step 1160) of performing a heat storage operation on the first heat storage tank 130 using the photovoltaic module 110 of FIG. 11 .

Referring to FIG. 11 , during the cooling period, in step 1110 , the controller 160 may determine whether the indoor temperature T _indoor is higher than the highest threshold temperature α _indoorH . For example, the highest critical temperature (α _indoorH ) may be about 25 °C.

In step 1110, when it is determined that the indoor temperature (T _indoor ) is higher than the highest critical temperature (α _indoorH ), the controller 160 determines whether the second heat storage tank 140 satisfies the cooling operation condition in step 1120. can judge Here, the controller 160 may determine whether the internal temperature (T _ST ) of the second heat storage tank 140 is less than or equal to the cooling possible temperature (α _CST ). For example, the cooling possible temperature (α _CST ) may be about 12 °C. And, when the internal temperature (T _ST ) of the second heat storage tank 140 is equal to or less than the cooling possible temperature (α _CST ), the controller 160 may determine that the second heat storage tank 140 satisfies the cooling operation condition. there is. Meanwhile, when the internal temperature (T _ST ) of the second thermal storage tank 140 exceeds the cooling possible temperature (α _CST ), the controller 160 determines that the second thermal storage tank 140 does not satisfy the cooling operation condition. can do.

In step 1120, if it is determined that the second heat storage tank 140 satisfies the cooling operation condition, the controller 160 may execute the cooling operation using the second heat storage tank 140 in step 1130. At this time, the second heat storage tank 140 may provide stored thermal energy to the fan coil unit 150 as shown in FIG. 12 . Through this, the fan coil unit 150 can provide cooling to the room by using the thermal energy provided from the second heat storage tank 140 . Here, the fan coil unit 150 may cool indoor air by using thermal energy provided from the second heat storage tank 140 .

Meanwhile, in step 1120, when it is determined that the second heat storage tank 140 does not satisfy the cooling operation condition, the controller 160 uses the air heat source heat pump 120 to control the second heat storage tank 140 in step 1140. ), storage operation can be performed. At this time, even if the indoor temperature (T _indoor ) is higher than the maximum critical temperature (α _indoorH ), when the second heat storage tank 140 does not satisfy the cooling operation condition, the second heat storage tank 140 stores thermal energy may not be provided to the fan coil unit 150. And, as shown in FIG. 13 , the second heat storage tank 140 may store thermal energy supplied from the air source heat pump 120 . Here, the second heat storage tank 140 may store thermal energy equal to or less than a cooling set temperature (T _CST ). For example, the cooling set temperature (T _CST ) of the second heat storage tank 140 may be about 10 °C.

In addition, the controller 160 in step 1150, the water outlet temperature (T _PVT ) of the photovoltaic module 110 may determine whether or not the set temperature (T _DHW ) of the first heat storage tank 130 or more. For example, the set temperature (T _DHW ) of the first heat storage tank 130 may be about 60 °C.

In step 1150, if the water outlet temperature (T _PVT ) of the photovoltaic module 110 is equal to or greater than the set temperature (T _DHW ) of the first heat storage tank 130, the controller 160, in step 1160, the photovoltaic module 110 A heat storage operation may be performed on the first heat storage tank 130 by using. At this time, the first heat storage tank 130, as shown in FIG. 14, may store thermal energy supplied from the photovoltaic module 110. Through this, the first thermal storage tank 130 may heat the incoming low-temperature water to high-temperature water using the stored thermal energy, thereby providing the high-temperature water.

FIG. 15 is a diagram showing in detail an overheat prevention operation (step 340) of the photovoltaic module 110 of FIG. 3 . FIG. 16 is a view for explaining the step (step 1520) of exchanging the stored water in the first heat storage tank 130 of FIG. 15 .

Referring to FIG. 15 , during the cooling period, in step 1510 , the controller 160 may determine whether the water outlet temperature T _PVT of the photovoltaic module 110 is greater than or equal to the upper limit reference temperature α _{PVT_H} . For example, the upper limit reference temperature α _{PVT_H} may be about 90 °C.

In step 1510, if the water outlet temperature (T _PVT ) of the photovoltaic module 110 is equal to or greater than the upper limit reference temperature (α _{PVT_H} ), the controller 160 may exchange the stored water in the first heat storage tank 130 in step 1520. can At this time, the controller 160, as shown in Figure 16, while circulating the water outlet of the photovoltaic module 110 between the photovoltaic module 110 and the first heat storage tank 130, the first heat storage tank ( 130) I can exchange my reservoir water. That is, the controller 160 may supply low temperature water to the first heat storage tank 130 while discharging high temperature water from the first heat storage tank 130 . For example, the controller 160 may supply low-temperature water of about 20 °C to the first thermal storage tank 130 while discharging high-temperature water of about 90 °C from the first thermal storage tank 130 .

In step 1530, the controller 160 may determine whether the water outlet temperature T _PVT of the photovoltaic module 110 is equal to or less than the lower limit reference temperature α _{PVT_L} . For example, the lower limit reference temperature α _{PVT_L} may be about 70 °C.

In step 1530 , when the water outlet temperature T _PVT of the photovoltaic module 110 exceeds the lower limit reference temperature α _{PVT_L} , the controller 160 may return to step 1520 . Through this, until the water outlet temperature (T _PVT ) of the photovoltaic module 110 is equal to or less than the lower limit reference temperature (α _{PVT_L} ), the controller 160 continues to output water from the photovoltaic module 110 to the photovoltaic module ( 110) and the first heat storage tank 130, the stored water in the first heat storage tank 130 may be exchanged.

Meanwhile, in step 1530, when the water outlet temperature (T _PVT ) of the photovoltaic module 110 is less than or equal to the lower limit reference temperature (α _{PVT_L} ), the controller 160 no longer exchanges the stored water in the first heat storage tank 130. can not

According to various embodiments, the heating/cooling and domestic hot water system 100 separately includes a first heat storage tank 130 for hot water supply and a second heat storage tank 140 for cooling/heating, so that the photovoltaic module 110 and the air source heat pump Using 120, it is possible to provide all cooling, heating and hot water supply. That is, during the heating period, the heating, cooling and hot water system 100 provides hot water using the photovoltaic module 110 and provides heating using the photovoltaic module 110 and the air source heat pump 120, , In the cooling period, hot water may be provided using the photovoltaic module 110 and cooling may be provided using the air source heat pump 120 . In addition, the heating/cooling and hot water supply system 100 may also perform freeze prevention operation for the photovoltaic module 110 in winter and overheat prevention operation in summer. Therefore, the heating, cooling and domestic hot water system 100 can effectively provide cooling, heating and domestic hot water by using the two heat storage tanks 130 and 140, the photovoltaic module 110, and the air source heat pump 120. .

A cooling/heating and hot water supply system 100 according to various embodiments includes a solar thermal module 110 configured to collect thermal energy from sunlight, an air source heat pump 120 configured to collect thermal energy from air, and solar energy. A first heat storage tank 130 configured to store thermal energy supplied from the photothermal module 110, a solar thermal module 110, or an air source heat pump 120 configured to store thermal energy supplied from at least one of Hot water is supplied using the thermal energy stored in the second thermal storage tank 140 and the first thermal storage tank 130, and heating or cooling is performed in the room using the thermal energy stored in the second thermal storage tank 140. It may include a controller 150 configured to provide.

According to various embodiments, the air source heat pump 120 supplies high-temperature thermal energy to the second heat storage tank 140 during a heating period, and supplies low-temperature heat energy to the second heat storage tank 140 during a cooling period. heat energy can be supplied.

According to various embodiments, the controller 160 uses the thermal energy stored in the second thermal storage tank 140 when the internal temperature of the second thermal storage tank 140 is equal to or higher than the heating possible temperature during the heating period, Heating may be provided, otherwise, the second heat storage tank 140 may be controlled to store thermal energy supplied from the air source heat pump 120 .

According to various embodiments, the controller 160 uses the thermal energy stored in the second thermal storage tank 140 when the internal temperature of the second thermal storage tank 140 is equal to or less than the cooling possible temperature during the cooling period. Provides cooling, otherwise, the second heat storage tank 140 can be controlled to store thermal energy supplied from the air source heat pump 120 .

According to various embodiments, the controller 160, when the water outlet temperature of the photovoltaic module 110 is higher than the set temperature of the first heat storage tank 130, the first heat storage tank 130 is the photovoltaic module 110 It can be controlled to store thermal energy supplied from

According to various embodiments, the set temperature of the first heat storage tank 130 may be higher than the heating set temperature of the second heat storage tank 140 .

According to various embodiments, the controller 160, during the heating period, if the water outlet temperature is less than the set temperature and exceeds the set heating temperature, the second heat storage tank 140 receives thermal energy supplied from the photovoltaic module 110. can be controlled to save.

According to various embodiments, the controller 160, in the heating period, if the outdoor temperature is lower than the threshold temperature, the solar module 110 until the water outlet temperature of the solar module 110 becomes equal to or higher than the reference temperature. It can be controlled so that the output water is circulated between the photovoltaic module 110 and the first heat storage tank 130 .

According to various embodiments, the controller 160, in the cooling period, when the water outlet temperature of the photovoltaic module 110 is equal to or higher than the upper limit reference temperature, when the outlet temperature of the photovoltaic module 110 is less than or equal to the lower limit reference temperature. Up to this point, while circulating the output water of the photovoltaic module 110 between the photovoltaic module 110 and the first thermal storage tank 130, it is possible to control the storage water in the first thermal storage tank 130 to be exchanged.

An operating method of a cooling/heating and domestic hot water system 100 according to various embodiments executes a heating period operation for hot water supply and heating by using a first heat storage tank 130 and a second heat storage tank 140 during a heating period. (step 320), and performing a cooling period operation for hot water supply and cooling by using the first heat storage tank 130 and the second heat storage tank 140 during the cooling period (step 340). there is.

According to various embodiments, the air source heat pump 120 supplies high-temperature thermal energy to the second heat storage tank 140 during a heating period, and supplies low-temperature heat energy to the second heat storage tank 140 during a cooling period. heat energy can be supplied.

According to various embodiments, the step of executing the heating period operation (step 320) includes providing hot water using the thermal energy stored in the first heat storage tank 130, and the inside of the second heat storage tank 140. If the temperature is equal to or higher than the heatable temperature, the step of providing heating to the room using the thermal energy stored in the second heat storage tank 140 (step 430), and the internal temperature of the second heat storage tank 140 is the heatable temperature. If it is less than the second heat storage tank 140, a step (step 440) of storing the heat energy supplied from the air source heat pump 120 may be included.

According to various embodiments, the set temperature of the first heat storage tank 130 may be higher than the heating set temperature of the second heat storage tank 140 .

According to various embodiments, the step of executing the heating period operation (step 320), when the water outlet temperature of the photovoltaic module 110 is equal to or higher than the set temperature of the first heat storage tank 130, the first heat storage tank 130 Storing the thermal energy supplied from the photovoltaic module 110 in step (step 460), and when the water outlet temperature is less than the set temperature and exceeds the heating set temperature, the second heat storage tank 140 is supplied from the photovoltaic module A step of storing thermal energy (step 480) may be further included.

According to various embodiments, performing the cooling period operation (step 340) includes providing hot water using the thermal energy stored in the first heat storage tank 130, and the inside of the second heat storage tank 140. When the temperature is equal to or less than the cooling possible temperature, providing cooling to the room by using the thermal energy stored in the second heat storage tank 140 (step 1130), the internal temperature of the second heat storage tank 140 determines the cooling possible temperature. If it exceeds, the step of storing the heat energy supplied from the air source heat pump 120 in the second heat storage tank 140 (step 440), and the water outlet temperature of the photovoltaic module 110 is reduced to the first heat storage tank 130 If the temperature is higher than the set temperature of, it may include storing the heat energy supplied from the photovoltaic module 110 in the first heat storage tank 130 (step 1160).

According to various embodiments of the present disclosure, in the heating period, when the outdoor temperature is lower than the critical temperature, the solar module 110 outputs water until the temperature of the solar module 110 reaches the reference temperature or higher. A step 320 of executing a freeze prevention operation of circulating between the photovoltaic module 110 and the first heat storage tank 130 may be further included.

According to various embodiments, the driving method, in the cooling period, when the water outlet temperature of the photovoltaic module 110 is higher than the upper limit reference temperature, until the water outlet temperature of the photovoltaic module 110 becomes less than the lower limit reference temperature, A further step of executing an overheating prevention operation of exchanging the stored water in the first thermal storage tank 130 while circulating the output water of the photovoltaic module 110 between the photovoltaic module 110 and the first thermal storage tank 130 can include

Various embodiments of this document and terms used therein are not intended to limit the technology described in this document to a specific embodiment, and should be understood to include various modifications, equivalents, and/or substitutes of the embodiment. In connection with the description of the drawings, like reference numerals may be used for like elements. Singular expressions may include plural expressions unless the context clearly dictates otherwise. In this document, expressions such as "A or B", "at least one of A and/or B", "A, B or C" or "at least one of A, B and/or C" refer to all of the items listed together. Possible combinations may be included. Expressions such as "first," "second," "first," or "second" may modify the elements in any order or importance, and are used only to distinguish one element from another. The components are not limited. When a (e.g., first) element is referred to as being "(functionally or communicatively) connected" or "connected" to another (e.g., second) element, it is referred to as being "connected" to the other (e.g., second) element. It may be directly connected to the component or connected through another component (eg, a third component).

According to various embodiments, each of the components described above may include a single entity or a plurality of entities. According to various embodiments, one or more components or steps among the aforementioned components may be omitted, or one or more other components or steps may be added. Alternatively or additionally, a plurality of components may be integrated into one component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to integration. According to various embodiments, steps performed by a module, program, or other component are executed sequentially, in parallel, iteratively, or heuristically, or one or more of the steps are executed in a different order, omitted, or , or one or more other steps may be added.

Claims (10)

In the heating and cooling and hot water system using solar heat and air heat at the same time,
a solar thermal module configured to collect thermal energy from sunlight;
an air source heat pump configured to collect thermal energy from air;
A first heat storage tank configured to store thermal energy supplied from the photovoltaic module;
a second heat storage tank configured to store thermal energy supplied from at least one of the photovoltaic module or the air source heat pump; and
A controller configured to provide hot water supply using the thermal energy stored in the first thermal storage tank, and to provide heating or cooling to a room using the thermal energy stored in the second thermal storage tank
including,
The controller,
During the heating period, when the outdoor temperature is lower than the critical temperature, the output water of the photovoltaic module is circulated between the photovoltaic module and the first heat storage tank until the temperature of the photovoltaic module is higher than the reference temperature. control,
During the cooling period, when the water outlet temperature of the photovoltaic module is higher than the upper limit reference temperature, the photovoltaic module and the first Controlling the storage water in the first heat storage tank to be exchanged while circulating between the heat storage tanks,
Air-conditioning and domestic hot water systems.
According to claim 1,
The air source heat pump,
During the heating period, high-temperature thermal energy is supplied to the second heat storage tank,
During the cooling period, low-temperature thermal energy is supplied to the second thermal storage tank,
The controller,
During the heating period, when the internal temperature of the second heat storage tank is equal to or higher than the heatable temperature, heating is provided to the room using the thermal energy stored in the second heat storage tank; otherwise, the second heat storage tank Controlling to store thermal energy supplied from the air source heat pump,
During the cooling period, if the internal temperature of the second heat storage tank is equal to or less than the cooling possible temperature, cooling is provided to the room using thermal energy stored in the second heat storage tank; otherwise, the second heat storage tank Controlling to store thermal energy supplied from the air source heat pump,
Air-conditioning and domestic hot water systems.
According to claim 1,
The controller,
Controlling the first heat storage tank to store thermal energy supplied from the photovoltaic module when the water outlet temperature of the photovoltaic module is equal to or higher than the set temperature of the first heat storage tank,
Air-conditioning and domestic hot water systems.
According to claim 3,
The set temperature of the first heat storage tank is higher than the heating set temperature of the second heat storage tank,
The controller,
In the heating period, when the water outlet temperature is less than the set temperature and exceeds the heating set temperature, controlling the second heat storage tank to store thermal energy supplied from the photovoltaic module,
Air-conditioning and domestic hot water systems.
delete In the operating method of the air conditioning and heating and hot water system using solar heat and air heat at the same time,
The heating and cooling and hot water system,
a solar thermal module configured to collect thermal energy from sunlight;
an air source heat pump configured to collect thermal energy from air;
A first heat storage tank configured to store thermal energy supplied from the photovoltaic module; and
A second heat storage tank configured to store thermal energy supplied from at least one of the photovoltaic module or the air source heat pump;
The driving method is
executing a heating period operation for hot water supply and heating by using the first heat storage tank and the second heat storage tank in a heating period; and
Executing a cooling period operation for hot water supply and cooling by using the first heat storage tank and the second heat storage tank in the cooling period;
including,
The driving method is
During the heating period, when the outdoor temperature is lower than the critical temperature, circulation of water output from the solar thermal module between the solar thermal module and the first thermal storage tank until the water outlet temperature of the solar thermal module is equal to or higher than the reference temperature. executing a freeze prevention operation; and
During the cooling period, when the water outlet temperature of the photovoltaic module is equal to or higher than the upper limit reference temperature, the photovoltaic module outputs water from the photovoltaic module and the second temperature module until the water outlet temperature of the photovoltaic module becomes less than or equal to the lower limit reference temperature. 1 Executing an overheat prevention operation of exchanging stored water in the first thermal storage tank while circulating between the thermal storage tanks
Including more,
how to drive.
According to claim 6,
The air source heat pump,
During the heating period, high-temperature thermal energy is supplied to the second heat storage tank,
During the cooling period, low-temperature thermal energy is supplied to the second thermal storage tank,
The step of executing the heating period operation,
providing the hot water by using thermal energy stored in the first thermal storage tank;
providing heating to the room by using the thermal energy stored in the second thermal storage tank when the internal temperature of the second thermal storage tank is equal to or higher than the heatable temperature; and
storing thermal energy supplied from the air source heat pump in the second thermal storage tank when the internal temperature of the second thermal storage tank is less than the heating possible temperature;
including,
how to drive.
According to claim 7,
The set temperature of the first heat storage tank is higher than the heating set temperature of the second heat storage tank,
The step of executing the heating period operation,
Storing thermal energy supplied from the photovoltaic module in the first thermal storage tank when the water outlet temperature of the photovoltaic module is equal to or higher than the set temperature of the first thermal storage tank; and
Storing thermal energy supplied from the photovoltaic module in the second heat storage tank when the water outlet temperature is less than the set temperature and exceeds the heating set temperature
Including more,
how to drive.
According to claim 7,
In the step of executing the cooling period operation,
providing the hot water by using thermal energy stored in the first thermal storage tank;
providing cooling to the room by using the thermal energy stored in the second thermal storage tank when the internal temperature of the second thermal storage tank is equal to or less than the cooling possible temperature;
storing thermal energy supplied from the air source heat pump in the second thermal storage tank when the internal temperature of the second thermal storage tank exceeds the cooling possible temperature; and
Storing thermal energy supplied from the photovoltaic module in the first thermal storage tank when the water outlet temperature of the photovoltaic module is equal to or higher than a set temperature of the first thermal storage tank
including,
how to drive.
delete

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