PVT and energy storage coupled ground source heat pump triple co-generation system

Abstract

The utility model provides a PVT and energy storage coupled ground source heat pump triple co-generation system which comprises a PV / T photovoltaic photo-thermal plate, a heat storage water tank, a ground source heat pump unit, a ground heat exchanger, an inverter, an indoor energy supply tail end and an energy storage battery. The PV / T photovoltaic photo-thermal plate is communicated with the heat storage water tank through a pipeline to form a first circulation loop; a tap water pipeline on the user side penetrates through the heat storage water tank; one side of the ground source heat pump unit is communicated with the ground heat exchanger through a ground source side circulating water pipeline to form a second circulating loop, and the other side of the ground source heat pump unit is communicated with the indoor energy supply tail end through a user side circulating water pipeline to form a third circulating loop; a second circulating pump B2 is arranged on the second circulating loop; the PV / T photovoltaic photo-thermal plate is electrically connected with the input end of the inverter, and the output end of the inverter is electrically connected with the energy storage battery, the indoor energy supply tail end and the second circulating pump B2. The system provided by the utility model can simultaneously meet various functions of cold supply, heat supply, power supply, domestic hot water and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to ground source heat pump and solar photovoltaic photothermal energy comprehensive utilization technical field, concretely relates to a kind of PVT adds energy storage coupled ground source heat pump triple-generation system. BACKGROUND

[0002] With the continuous development of clean energy technology, single ground source heat pump technology and solar technology have gradually matured so far. However, the use of single heat source is often limited by certain climate conditions, and an important optimization method is to use the coupling technology of solar photovoltaic / photothermal system and ground source heat pump system to form a solar photovoltaic / photothermal-ground source heat pump coupling system to improve system energy efficiency.

[0003] The current solar photovoltaic / photothermal-ground source heat pump coupling system still has a single function and cannot simultaneously meet the demand for cooling, heating, power supply and domestic hot water. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a PVT adds energy storage coupled ground source heat pump triple-generation system that can simultaneously meet the functions of cooling, heating, power supply and domestic hot water.

[0005] A PVT adds energy storage coupled ground source heat pump triple-generation system, comprising: a PV / T photovoltaic photothermal plate, a heat storage water tank, a ground source heat pump unit, a buried pipe heat exchanger, an inverter, an indoor energy supply terminal and an energy storage battery.

[0006] The PV / T photovoltaic photothermal plate is connected to the heat storage water tank through a pipeline to form a first circulation loop, and a user-side water pipeline passes through the heat storage water tank.

[0007] One side of the ground source heat pump unit is connected to the buried pipe heat exchanger through a ground source side circulation water pipeline to form a second circulation loop, and the other side is connected to the indoor energy supply terminal through a user side circulation water pipeline to form a third circulation loop. A second circulation pump B2 is arranged on the second circulation loop.

[0008] The PV / T photovoltaic photothermal plate is electrically connected to the input end of the inverter, and the output end of the inverter is electrically connected to the energy storage battery, the indoor energy supply terminal and the second circulation pump B2.

[0009] Further, the PVT adds energy storage coupled ground source heat pump triple-generation system described above further comprises an electric heating device, which is arranged in the heat storage water tank.

[0010] The output end of the inverter is electrically connected to the electric heating device.

[0011] Further, the PVT plus energy storage coupled ground source heat pump triple generation system as described above, a second thermometer T2 is arranged in the heat storage water tank.

[0012] Further, the PVT plus energy storage coupled ground source heat pump triple generation system as described above, the second circulating loop comprises two circulating branches, namely a first circulating branch and a second circulating branch.

[0013] The first circulating branch is communicated with the pipeline of the ground source heat pump unit directly after passing through the third electromagnetic valve F3; the second circulating branch is communicated with the pipeline of the ground source heat pump unit after passing through the inside of the heat storage water tank; a fifth electromagnetic valve F7 is arranged on the second circulating branch.

[0014] Further, the PVT plus energy storage coupled ground source heat pump triple generation system as described above, a fourth circulating loop is further connected in parallel on the third circulating loop, and a part of the fourth circulating loop is arranged in the heat storage water tank.

[0015] A fourth circulating pump B4 is arranged on the third circulating loop, and a third circulating pump B3 is arranged on the fourth circulating loop.

[0016] The output end of the inverter is electrically connected with the fourth circulating pump B4 and the third circulating pump B3.

[0017] Further, the PVT plus energy storage coupled ground source heat pump triple generation system as described above, two branches are arranged on the first circulating loop, one branch is communicated with the heat storage water tank to form the first circulating loop after passing through the first circulating pump B1; and the other branch is communicated with the heat storage water tank to form the first circulating loop after passing through the second electromagnetic valve F2 and the liquid storage tank 6.

[0018] The output end of the inverter is electrically connected with the first circulating pump B1.

[0019] Further, the PVT plus energy storage coupled ground source heat pump triple generation system as described above, a PV panel is arranged between the PVT photovoltaic and photo-thermal panel and the inverter.

[0020] Further, the PVT plus energy storage coupled ground source heat pump triple generation system as described above, the output end of the inverter is electrically connected with household appliances on the user side.

[0021] The system provided by the utility model can meet multiple functions such as cold supply, heat supply, power supply and domestic hot water supply. ACCURACY OF DRAWINGS

[0022] Figure 1 is the structural schematic diagram of the PVT plus energy storage coupled ground source heat pump triple generation system provided by the utility model;

[0023] Reference signs:

[0024] 1-PVT photovoltaic and photo-thermal panel, 2-heat storage water tank, 3-ground source heat pump unit, 4-buried pipe heat exchanger, 5-electric heating device, 6-liquid storage tank, 7-inverter, 8-bidirectional electric meter, 9-household appliance, 10-power grid, 11-indoor energy supply terminal, 12-energy storage battery, 13-PV panel, B1-first circulating pump, B2-second circulating pump, B3-third circulating pump, B4-fourth circulating pump, T1-first thermometer, T2-second thermometer, T3-third thermometer, F1-first electromagnetic valve, F2-second electromagnetic valve, F3-third electromagnetic valve, F4-first three-way valve, F5-second three-way valve, F6-fourth electromagnetic valve, F7-fifth electromagnetic valve. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the utility model will be described clearly and completely below in combination with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] Figure 1 The PVT and energy storage coupled ground source heat pump triple supply system provided by the utility model, as shown in the figure, comprises a PV / T photovoltaic and photo-thermal panel 1, a heat storage water tank 2, a ground source heat pump unit 3, an inverter 7, an indoor energy supply terminal 11 and an energy storage battery 12. Figure 1 The PV / T photovoltaic and photo-thermal panel 1 is in communication with the heat storage water tank 2 through a pipeline to form a first circulating loop. A tap water pipeline on the user side passes through the heat storage water tank 2. One side of the ground source heat pump unit 3 is in communication with a buried pipe heat exchanger 4 through a ground source side circulating water pipeline to form a second circulating loop, and the other side is in communication with the indoor energy supply terminal 11 through a user side circulating water pipeline to form a third circulating loop. A second circulating pump B2 is arranged on the second circulating loop. The PV / T photovoltaic and photo-thermal panel 1 is electrically connected with the input end of the inverter 7, and the output end of the inverter 7 is electrically connected with the energy storage battery 12, the indoor energy supply terminal 11 and the second circulating pump B2 respectively.

[0027] Specifically, the photovoltaic part of the PV / T photovoltaic-thermal panel 1 adopts a solar photovoltaic panel to directly convert solar radiation energy into electric energy through a photovoltaic effect. The photo-thermal part of the PV / T photovoltaic-thermal panel 1 is mainly a heat collector, which converts solar energy into heat energy through a heat circulation mechanism by using the waste heat generated on the back of the photovoltaic module. In the cooling mode, the ground source heat pump unit 3 can release heat from the ground heat exchanger 4 and discharge the heat to the soil environment through a heat exchange process to supplement heat; at the same time, corresponding to the indoor heating terminal, the cold collecting terminal is responsible for sending the low-temperature air or water treated by the ground source heat pump unit into the indoor energy supply terminal 11 to realize the cooling effect. In the heating mode, the ground source heat pump unit 3 absorbs heat from the ground source through the ground heat exchanger 4. The circulating water after absorbing heat enters the ground source heat pump unit 3 and exchanges heat with the circulating water of the heating system. The high-temperature hot water after heat exchange is sent to the indoor energy supply terminal 11 to transfer heat to indoor air, thereby realizing the heating effect.

[0028] In the PVT plus energy storage coupled ground source heat pump triple supply system provided by the utility model, through the first circulating loop, the heat energy generated by the PV / T photovoltaic-thermal panel 1 is supplied to the heat storage water tank 2, so that the temperature of the heat storage water tank 2 can be improved. The ground source heat pump unit 3 realizes energy supplement or release through the second circulating loop, and then the air after further cooling or heating is obtained by the ground source heat pump unit and is supplied to the indoor energy supply terminal 11 through the third circulating loop. The first electromagnetic valve F1 is arranged on the tap water pipeline at the user side. When the user needs to use hot water, the first electromagnetic valve F1 is opened, and the tap water is indirectly exchanged with the heat storage water tank 2 to obtain the domestic hot water that can be used by the user. At the same time, the electric energy generated by the PV / T photovoltaic-thermal panel 1 can be converted into alternating current by the inverter 7 and is supplied to the indoor energy supply terminal 11.

[0029] The system provided by the utility model can simultaneously satisfy multiple functions such as cooling, heating, power supply and domestic hot water.

[0030] Further, the PVT plus energy storage coupled ground source heat pump triple supply system provided by the utility model further comprises an electric heating device 5 arranged in the heat storage water tank 2, and the output end of the inverter 7 is electrically connected with the electric heating device 5.

[0031] Specifically, when the temperature of the heat storage water tank 2 is insufficient to meet the requirement of indirect heat exchange, the electric heating device 5 is used to heat the heat storage water tank 2, and the electric energy of the electric heating device 5 is preferentially obtained from the electric energy generated by the PV / T photovoltaic-thermal panel 1. Therefore, the system provided by the utility model can simultaneously satisfy multiple functions such as cooling, heating, power supply and domestic hot water and can effectively save energy.

[0032] Further, the PVT plus energy storage coupled ground source heat pump triple supply system provided by the utility model sets up second thermometer T2 in heat storage water tank 2.

[0033] Specifically, through second thermometer T2, the temperature in heat storage water tank 2 can be grasped in real time, and through grasping the temperature in heat storage water tank 2, it can be determined whether heating device 5 needs to provide heat energy.

[0034] Further, the PVT plus energy storage coupled ground source heat pump triple supply system provided by the utility model sets up second circulating loop including setting up 2 circulating branches, respectively first circulating branch and second circulating branch, first circulating branch directly communicates with the pipeline of ground source heat pump unit 3 after fifth electromagnetic valve F7, second circulating branch communicates with the pipeline of ground source heat pump unit 3 after passing through the inside of heat storage water tank 2, and third electromagnetic valve F3 is arranged on the second circulating branch.

[0035] Specifically, the utility model designs 2 circulating branches on second circulating loop, and the purpose lies in: if the temperature of ground source side circulating water from ground heat exchanger is lower than the temperature of heat storage water tank 2, ground source side circulating water can be indirectly heat exchanged through heat storage water tank 2 again, then indoor energy supply terminal 11 is supplied with heat or cold after being treated by ground source heat pump unit 3, thereby avoiding the phenomenon that ground source heat pump unit 3 directly treats ground source side circulating water from ground heat exchanger, and therefore, the energy consumption of ground source heat pump unit 3 is effectively reduced.

[0036] Further, the PVT plus energy storage coupled ground source heat pump triple supply system provided by the utility model sets up fourth circulating loop in parallel on third circulating loop, a part of the fourth circulating loop is arranged in heat storage water tank 2, fourth circulating pump B4 is arranged on third circulating loop, and third circulating pump B3 is arranged on fourth circulating loop; the output end of inverter 7 is electrically connected with fourth circulating pump B4 and third circulating pump B3 respectively.

[0037] Specifically, when the temperature in the heat storage water tank 2 is greater than or equal to 50 DEG C, the indoor energy supply terminal 11 is heated, and the fourth circulating loop is directly used for heating, that is, the circulating water in the fourth circulating loop is indirectly heated by the heat storage water tank 2 and directly supplies heat to the indoor energy supply terminal 11, so that the third circulating loop is not needed, and the ground source heat pump unit 3 is not needed to heat the user, thereby reducing the energy consumption of the ground source heat pump unit 3. Moreover, the third circulating pump B3 is arranged on the fourth circulating loop, and the third circulating pump B3 is powered by the PVT photovoltaic-thermal panel 1, thereby further reducing the energy consumption of the entire system. When the temperature in the heat storage water tank 2 is less than 50 DEG C, the circulating water is indirectly heated by the heat storage water tank 2 through the second circulating loop, and then the circulating water is treated by the ground source heat pump unit 3 to supply heat to the user side.

[0038] Further, the PVT plus energy storage coupled ground source heat pump triple supply system provided by the utility model has two branches on the first circulating loop, one branch is connected with the heat storage water tank 2 after passing through the first circulating pump B1, and the other branch is connected with the heat storage water tank 2 after passing through the second electromagnetic valve F2 and the liquid storage tank 6, and the output end of the inverter 7 is electrically connected with the first circulating pump B1.

[0039] Specifically, when the temperature of the PVT photovoltaic-thermal panel 1 is too high, the circulating medium in the first circulating loop may leak, therefore, the two branches are arranged on the first circulating loop, the circulating medium in the first circulating loop is stored in the liquid storage tank 6 when the temperature of the PVT photovoltaic-thermal panel 1 is too high, so as to avoid the problem of leakage of the circulating medium, thereby providing stability of the entire system, at this time, the PVT photovoltaic-thermal panel 1 only generates electricity and does not provide heat energy. Only when the temperature of the PVT photovoltaic-thermal panel 1 is lower than a preset value, the circulating medium circulates in the other branch to continuously provide heat energy for the heat storage water tank 2.

[0040] Further, the PVT plus energy storage coupled ground source heat pump triple supply system provided by the utility model has a PV panel 13 between the PVT photovoltaic-thermal panel 1 and the inverter 7.

[0041] Specifically, the PV panel 13 only generates electricity and does not provide heat energy. In order to ensure that all the electricity of the entire system comes from the PVT photovoltaic-thermal panel 1 or the PV panel 13, but not the power grid 10, the utility model adds a group of PV panels 13 between the PVT photovoltaic-thermal panel 1 and the inverter 7 to provide electricity for the entire system, thereby further reducing the energy consumption of the system.

[0042] Further, the PVT plus energy storage coupled ground source heat pump triple supply system provided by the utility model has an output end of the inverter 7 electrically connected with a household appliance 9 on the user side.

[0043] Due to the system provided by the application, a set of PV panels 13 is added, so that more electrical appliances of the user can be provided with electrical energy, thereby further reducing the energy consumption of the system.

[0044] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A PVT plus thermal energy storage coupled ground source heat pump trigeneration system, comprising: PV / T photovoltaic and photothermal panel (1), heat storage water tank (2), ground source heat pump unit (3), ground buried pipe heat exchanger (4), inverter (7), indoor energy supply terminal (11), energy storage battery (12); The PV / T photovoltaic and photothermal panel (1) is in communication with the heat storage water tank (2) through a pipeline to form a first circulation loop; a tap water pipeline on the user side passes through the heat storage water tank (2) from inside the heat storage water tank (2); One side of the ground source heat pump unit (3) is in communication with the ground buried pipe heat exchanger (4) through a ground source side circulation water pipeline to form a second circulation loop, and the other side is in communication with the indoor energy supply terminal (11) through a user side circulation water pipeline to form a third circulation loop; a second circulation pump (B2) is arranged on the second circulation loop; The PV / T photovoltaic and photothermal panel (1) is electrically connected with an input end of the inverter (7), and output ends of the inverter (7) are electrically connected with the energy storage battery (12), the indoor energy supply terminal (11) and the second circulation pump (B2) respectively.

2. The PVT plus thermal storage and energy coupling ground source heat pump triple generation system according to claim 1, characterized in that, An electric heating device (5) is further arranged in the heat storage water tank (2); Output ends of the inverter (7) are electrically connected with the electric heating device (5).

3. The PVT plus thermal storage and energy coupling ground source heat pump triple generation system according to claim 2, characterized in that, A second thermometer (T2) is arranged in the heat storage water tank (2).

4. The PVT plus thermal storage and energy coupling ground source heat pump triple generation system according to claim 1, characterized in that, The second circulation loop comprises two circulation branches, namely a first circulation branch and a second circulation branch; The first circulation branch is directly in communication with a pipeline of the ground source heat pump unit (3) after passing through a third electromagnetic valve (F3); the second circulation branch is in communication with the pipeline of the ground source heat pump unit (3) after passing through the inside of the heat storage water tank (2); and a fifth electromagnetic valve (F7) is arranged on the second circulation branch.

5. The PVT plus thermal storage and energy coupling ground source heat pump triple generation system according to claim 3, characterized in that, A fourth circulation loop is further connected in parallel on the third circulation loop, and a part of the fourth circulation loop is arranged in the heat storage water tank (2); A fourth circulation pump (B4) is arranged on the third circulation loop, and a third circulation pump (B3) is arranged on the fourth circulation loop; Output ends of the inverter (7) are electrically connected with the fourth circulation pump (B4) and the third circulation pump (B3) respectively.

6. The PVT plus thermal storage and energy coupling ground source heat pump triple generation system according to claim 1, characterized in that, Two branches are arranged on the first circulation loop, one branch is in communication with the heat storage water tank (2) after passing through a first circulation pump (B1) to form the first circulation loop, and the other branch is in communication with the heat storage water tank (2) after passing through a second electromagnetic valve (F2) and a liquid storage tank (6) to form the first circulation loop; An output end of the inverter (7) is electrically connected with the first circulation pump (B1).

7. The PVT plus stored-energy coupled ground-source heat pump triple-generation system according to any one of claims 1-6, characterized in that, A PV panel (13) is arranged between the PV / T photovoltaic and photothermal panel (1) and the inverter (7).

8. The PVT plus thermal storage and energy coupling ground source heat pump triple generation system according to claim 7, characterized in that, An output end of the inverter (7) is electrically connected with a household appliance (9) on the user side.

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