Composite heat storage and energy supply system

Abstract

The utility model belongs to the technical field of heating, and particularly discloses a composite heat storage energy supply system, which comprises a floor heating water supply pipe, a floor heating water return pipe and a controller, and the floor heating water supply pipe and the floor heating water return pipe are communicated through an external floor heating pipe to form a heating loop. A heat exchange circulating pump, a plate heat exchanger, a heat collection side water pump, a solar heat collector and a heat storage assembly are sequentially arranged on the heating loop in the liquid flowing direction. A first temperature sensor is arranged at the water outlet end of the solar heat collector, and the controller is connected with the second electromagnetic valve, the heat exchange circulating pump, the heat collection side water pump and the first temperature sensor. The floor heating water supply pipe and the floor heating water return pipe are communicated with the external floor heating pipe, the solar heat collector is adopted for heating, heat of the solar heat collector is output to the heat storage assembly through the plate type heat exchanger for heat storage, the problem of heating interruption caused by weather can be effectively avoided, and the heating efficiency is improved. And the floor heating water supply pipe and the floor heating water return pipe adopt an exposed design form, so that convenience is provided for later maintenance.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating, and particularly relates to a composite heat storage energy supply system. Background Art

[0002] my country's coal-based energy structure makes building heating energy one of the main factors causing urban air pollution. With the development of my country's national economy and the improvement of people's living standards, people's requirements for living environment are not limited to the expansion of building area, but also require a more comfortable thermal environment indoors. The proportion of energy consumption used for heating in the total energy consumption is increasing. Therefore, it is very important to reduce heating energy consumption. There are two major means to solve this problem: one is to develop new environmentally friendly renewable energy (solar energy, geothermal energy, nuclear energy, etc.); the other is to improve the energy efficiency of the heating system.

[0003] Since solar energy is a rare energy source, it varies greatly between day and night, and is also affected by random factors such as cloudy, sunny, and rainy weather. However, the heat required by the system is often inconsistent with the solar energy obtained by the system: when the weather is clear, the outdoor temperature is high and the solar radiation is strong, while the heat load is relatively small at this time. At night or when it is cloudy and rainy, the outdoor temperature is low, and the heat collected by the collector is very little or even zero, while this is when the heat supply is large. Therefore, to utilize solar energy, it is necessary to solve the intermittent and instability problems of solar energy. The Chinese patent with publication number CN214094685U discloses a solar phase change heat storage heating system. Before laying the circulating water pipe on the floor, a layer of heat storage plate is laid first. The heat of the solar water heater is transferred to the heat storage plate, and the heat is absorbed by the phase change material in the heat storage plate, which improves the heating efficiency of solar energy. However, in this scheme, the phase change heat storage plate used for heat storage is set below the ground, and it cannot be regularly maintained. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects in the prior art and provide a composite heat storage energy supply system.

[0005] The utility model provides a composite heat storage energy supply system, comprising a floor heating water supply pipe, a floor heating water return pipe and a controller, wherein the floor heating water supply pipe and the floor heating water return pipe are connected through an external floor heating pipe to form a heating circuit, and a first manual valve and a second manual valve are arranged at one end of the floor heating water supply pipe and the floor heating water return pipe close to the floor heating pipe; a heat exchange circulation pump, a plate heat exchanger, a heat collection side water pump, a solar collector and a heat storage component are arranged in sequence along the liquid flow direction on the heating circuit;

[0006] The water outlet of the heat exchange circulation pump is connected to the cold source inlet of the plate heat exchanger, and a second solenoid valve is provided between the water outlet of the heat exchange circulation pump and the cold source inlet of the plate heat exchanger;

[0007] The cold source outlet of the plate heat exchanger is connected to the water pump on the heat collection side;

[0008] The water outlet of the solar thermal collector is communicated with the heat source inlet of the plate heat exchanger, and the heat source outlet of the plate heat exchanger is communicated with the heat storage component for storing the heat energy of the solar thermal collector, and the heat storage component is connected to the floor heating water supply pipe;

[0009] The water outlet of the solar collector is provided with a first temperature sensor, and the controller is respectively connected with the second solenoid valve, the heat exchange circulation pump, the collector side water pump and the first temperature sensor.

[0010] A further solution is that a constant pressure expansion tank is provided between the cold source outlet of the plate heat exchanger and the water pump on the heat collection side.

[0011] A further solution is that the controller is also connected to a third temperature sensor for monitoring the indoor ambient temperature.

[0012] A further solution is that an auxiliary heater is further provided on the floor heating water supply pipe, the inlet and outlet of the auxiliary heater are respectively connected to the floor heating water supply pipe through the first auxiliary heating branch pipe and the second auxiliary heating branch pipe, a fourth solenoid valve is provided on the first auxiliary heating branch pipe, a fifth solenoid valve is provided on the second auxiliary heating branch pipe, a third solenoid valve is provided at the heat source outlet of the plate heat exchanger, and a sixth solenoid valve is further provided on the floor heating water supply pipe, and the sixth solenoid valve is located between the first auxiliary heating branch pipe and the second auxiliary heating branch pipe;

[0013] The water outlet of the heat exchange circulation pump is also connected to the floor heating water supply pipe through a first branch pipe, a first solenoid valve is provided on the first branch pipe, and the intersection of the first branch pipe and the floor heating water supply pipe is located on the side of the liquid flow direction of the third solenoid valve;

[0014] The first solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, and the sixth solenoid valve are respectively connected to the controller.

[0015] A further solution is that the heat storage assembly includes a tenth solenoid valve, a flow meter, and a heat storage device which are sequentially arranged on the second branch pipe along the liquid flow direction, and a second temperature sensor is also arranged inside the heat storage device;

[0016] The second branch pipe is arranged on the floor heating water supply pipe, and the second branch pipe is located on one side of the intersection of the second auxiliary heating branch pipe and the floor heating water supply pipe along the liquid flow direction;

[0017] A third branch pipe is also provided at the water outlet end of the heat storage device, the third branch pipe is connected to the floor heating water supply pipe, and an eighth solenoid valve is also provided on the third branch pipe;

[0018] A seventh solenoid valve is also provided between the intersection of the second branch pipe and the floor heating water supply pipe and the intersection of the third branch pipe and the floor heating water supply pipe;

[0019] The seventh solenoid valve, the eighth solenoid valve, the tenth solenoid valve, and the second temperature sensor are respectively connected to the controller.

[0020] A further solution is that a fourth branch pipe is further provided at the water outlet of the heat storage device, and the fourth branch pipe is connected to the floor heating return pipe;

[0021] A ninth solenoid valve, a buffer water tank and an eleventh solenoid valve are sequentially arranged on the fourth branch pipe along the liquid flow direction, and the buffer water tank is also externally connected to a tap water pipe.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] (1) The utility model connects the floor heating water supply pipe and the floor heating return pipe with the external floor heating pipe, adopts solar thermal collector for heating, and outputs the heat of the solar thermal collector to the heat storage component through the plate heat exchanger for heat storage, which can effectively avoid the problem of heating interruption due to weather reasons. In addition, the floor heating water supply pipe and the floor heating return pipe are designed to be exposed, which provides convenience for later maintenance.

[0024] (2) In order to ensure the heating effect, the utility model also arranges an auxiliary heater in the heating circuit. By coupling solar heating with electric heat storage, heat can be stored during off-peak hours and released during peak hours, thereby realizing peak load shifting and valley filling of the heating system and reducing the operating costs of the system, thereby helping to reduce the capacity increase and peak load regulation pressure of the power grid.

[0025] (3) The controller of the utility model is based on PLC, and controls the switching of heating modes through temperature sensors, thereby realizing remote control; the solar collector and the water pump unit are connected in series, which also saves power consumption and reduces investment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following drawings are only used to illustrate and explain the present invention, and are not intended to limit the scope of the present invention, wherein:

[0027] Figure 1 : Schematic diagram of system connection of the utility model. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution, design method and advantages of the utility model clearer, the utility model is further described in detail through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] like Figure 1 As shown, the utility model provides a composite heat storage energy supply system, including a floor heating water supply pipe, a floor heating return pipe and a controller 10, wherein the floor heating water supply pipe and the floor heating return pipe are connected through an external floor heating pipe to form a heating circuit. A first manual valve 25 and a second manual valve 26 are arranged at one end of the floor heating water supply pipe and the floor heating return pipe close to the floor heating pipe; a heat exchange circulation pump 8, a plate heat exchanger 2, a constant pressure expansion tank 6, a heat collection side water pump 7, a solar collector 1, an auxiliary heater 3, a heat storage component, and a buffer water tank 5 are arranged in sequence along the liquid flow direction on the heating circuit, a first temperature sensor 11 is arranged at the water outlet end of the solar collector 1, a second temperature sensor 12 is arranged inside the heat storage device 4, and a third temperature sensor 13 is connected to the controller 10. A first solenoid valve 14 to an eleventh solenoid valve 24 are also arranged on the heating circuit, wherein the controller 10 is respectively connected to the heat exchange circulation pump 8, the heat collection side water pump 7, the first temperature sensor 11 to the third temperature sensor 13, and the first solenoid valve 14 to the eleventh solenoid valve 24 to realize remote automatic control. In this embodiment, the controller 10 includes a touch screen and a PLC controller. The PLC controller uses a Siemens S7-1200 series PLC, the touch screen is a Siemens 10-inch KTP screen or a Shenzhen Kunlun Tongtai MCGS 10-inch TP screen, and the communication network between the two uses Gigabit Ethernet. The first temperature sensor 11 to the third temperature sensor 13 all use integrated thermal resistor thermometers with a measuring range of 0-150°C. The opening and closing modes of the first solenoid valve 14 to the eleventh solenoid valve 24 are power-on disconnection / power-off conduction.

[0030] The above components are connected in the following way:

[0031] The water outlet of the heat exchange circulation pump 8 is connected to the cold source inlet of the plate heat exchanger 2, and a second solenoid valve 15 is provided between the water outlet of the heat exchange circulation pump 8 and the cold source inlet of the plate heat exchanger 2; the cold source outlet of the plate heat exchanger 2 is connected to the heat collection side water pump 7; the water outlet of the solar collector 1 is connected to the heat source inlet of the plate heat exchanger 2, and the heat source outlet of the plate heat exchanger 2 is connected to the heat storage component for storing the heat energy of the solar collector 1, and the heat storage component is connected to the floor heating water supply pipe; the water outlet of the solar collector 1 is provided with a first temperature sensor 11. A constant pressure expansion tank 6 is provided between the cold source outlet of the plate heat exchanger 2 and the heat collection side water pump 7. The inlet and outlet of the auxiliary heater 3 are respectively connected to the floor heating water supply pipe through the first auxiliary heating branch pipe 31 and the second auxiliary heating branch pipe 32. A fourth solenoid valve 17 is arranged on the first auxiliary heating branch pipe 31, and a fifth solenoid valve 18 is arranged on the second auxiliary heating branch pipe 32. A third solenoid valve 16 is arranged at the heat source outlet of the plate heat exchanger 2. A sixth solenoid valve 19 is also arranged on the floor heating water supply pipe, and the sixth solenoid valve 19 is located between the first auxiliary heating branch pipe 31 and the second auxiliary heating branch pipe 32; the water outlet end of the heat exchange circulation pump 8 is also connected to the floor heating water supply pipe through the first branch pipe 27, and a first solenoid valve 14 is arranged on the first branch pipe 27. The intersection of the first branch pipe 27 and the floor heating water supply pipe is located on one side of the liquid flow direction of the third solenoid valve 16; the heat storage component includes a tenth solenoid valve 23, a flow meter 9, and a heat storage device which are arranged on the second branch pipe 28 in sequence along the liquid flow direction. 4. A second temperature sensor 12 is also arranged inside the heat storage device 4; the second branch pipe 28 is arranged on the floor heating water supply pipe, and the second branch pipe 28 is located on the side of the intersection of the second auxiliary heating branch pipe 32 and the floor heating water supply pipe along the liquid flow direction; a third branch pipe 29 is also arranged at the water outlet end of the heat storage device 4, the third branch pipe 29 is connected with the floor heating water supply pipe, and an eighth solenoid valve 21 is also arranged on the third branch pipe 29; a seventh solenoid valve 20 is also arranged between the intersection of the second branch pipe 28 and the floor heating water supply pipe and the intersection of the third branch pipe 29 and the floor heating water supply pipe; a fourth branch pipe 30 is also arranged at the water outlet end of the heat storage device 4, and the fourth branch pipe 30 is connected to the floor heating return pipe; a ninth solenoid valve 22, a buffer water tank 5 and an eleventh solenoid valve 24 are sequentially arranged on the fourth branch pipe 30 along the liquid flow direction, and the buffer water tank 5 is also externally connected to a tap water pipe. The first temperature sensor 11 is used to monitor the solar water outlet temperature, denoted as T1, the second temperature sensor 12 is used to monitor the material temperature inside the heat storage device 4, denoted as T2, and the third temperature sensor 13 is used to monitor the indoor environment temperature, denoted as T3.

[0032] Based on the above system, there are multiple heating modes when heating is performed, which are explained by the following examples:

[0033] (1) During the day, when the outlet water temperature of the solar collector 1 is T1 < 35°C and T2 > 58°C, the solar temperature is far from meeting the heating requirement. When the room needs heating, the heat stored in the heat storage device 4 the previous night is used for heating.

[0034] (2) When the outlet water temperature of solar collector 1 is 35℃≤T1<45℃ and T2>50℃, when the room needs heating, the solar energy + heat storage device combined heating mode is adopted (this mode is because when the solar energy collection temperature does not meet the floor radiant heating water supply temperature, the heat storage device is used to further increase the water temperature to meet the water supply temperature requirement of the heating system).

[0035] (3) When the outlet water temperature of solar collector 1 is 45℃≤T1≤50℃, solar energy direct supply mode.

[0036] (4) When the outlet water temperature of solar collector 1 is T1>50℃, T2<T1-8℃ (adjustable), the solar energy storage and supply mode (to raise the temperature of the heat storage device)

[0037] (5) When the outlet water temperature of the solar collector T1 is less than 35°C and T2 is less than 35°C, the auxiliary heater 3 heating mode is adopted (when there is no available solar energy on cloudy days and the heat storage device does not have the heating capacity).

[0038] Specifically, the controller 10 controls the switches of different solenoid valves and water pumps to perform the switching mode operation. For the convenience of description, the first solenoid valve 14 to the eleventh solenoid valve 24 are denoted as DF1 to DF11.

[0039] When using mode (1) for heating, turn off the water pump 7 on the collector side, close the solenoid valves DF2, DF3, DF4, DF5, DF7, DF9, and DF11, open the solenoid valves DF1, DF6, DF10, and DF8, open the first manual valve 25 and the second manual valve 26, start the heat exchange circulation pump 8, and then the heat storage device can be used for heating.

[0040] When using mode (2) for heating, close the solenoid valves DF1, DF4, DF5, DF7, DF9, and DF11, open the solenoid valves DF2, DF3, DF6, DF10, and DF8, open the first manual valve 25 and the second manual valve 26, start the heat exchange circulation pump 8, and then the solar energy + heat storage device can be used for heating.

[0041] When using mode (3) for heating, turn on the water pump 7 on the collector side, close the solenoid valves DF1, DF4, DF5, DF8, DF9, DF10, and DF11, open the solenoid valves DF2, DF3, DF6, and DF7, open the first manual valve 25 and the second manual valve 26, start the heat exchange circulation pump 8, and then solar energy can be used for heating.

[0042] When using mode (4) for heating, turn on the water pump 7 on the collector side, close the solenoid valves DF1, DF4, DF5, DF7, DF9, and DF11, open the solenoid valves DF2, DF3, DF6, DF8, and DF10, open the first manual valve 25 and the second manual valve 26, and start the heat exchange circulation pump 8. At this time, solar energy can be used to store energy and provide heating at the same time.

[0043] When using mode (5) for heating, turn off the water pump 7 on the collector side, close the solenoid valves DF2, DF3, DF6, DF8, DF9, DF10, and DF11, open the solenoid valves DF1, DF4, DF5, and DF7, open the first manual valve 25 and the second manual valve 26, start the heat exchange circulation pump 8, set the temperature of the auxiliary heater 3 to 50°C (adjustable), and start the auxiliary heater 3 at the same time; at this time, the electric auxiliary heater can be used for heating.

[0044] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A composite heat storage energy supply system, comprising a floor heating water supply pipe, a floor heating return pipe and a controller (10), wherein the floor heating water supply pipe and the floor heating return pipe are connected through an external floor heating pipe to form a heating circuit, and a first manual valve (25) and a second manual valve (26) are arranged at one end of the floor heating water supply pipe and the floor heating return pipe close to the floor heating pipe; characterized in that: A heat exchange circulation pump (8), a plate heat exchanger (2), a heat collection side water pump (7), a solar collector (1) and a heat storage component are sequentially arranged on the heating circuit along the liquid flow direction; The water outlet of the heat exchange circulation pump (8) is connected to the cold source inlet of the plate heat exchanger (2), and a second solenoid valve (15) is provided between the water outlet of the heat exchange circulation pump (8) and the cold source inlet of the plate heat exchanger (2); The cold source outlet of the plate heat exchanger (2) is connected to the heat collection side water pump (7); The water outlet of the solar thermal collector (1) is in communication with the heat source inlet of the plate heat exchanger (2), and the heat source outlet of the plate heat exchanger (2) is in communication with the heat storage component for storing the heat energy of the solar thermal collector (1), and the heat storage component is connected to the floor heating water supply pipe; A first temperature sensor (11) is provided at the water outlet of the solar collector (1), and the controller (10) is respectively connected to the second solenoid valve (15), the heat exchange circulation pump (8), the heat collection side water pump (7) and the first temperature sensor (11).

2. A composite thermal storage energy supply system according to claim 1, characterized in that: A constant pressure expansion tank (6) is provided between the cold source outlet of the plate heat exchanger (2) and the heat collection side water pump (7).

3. A composite thermal storage energy supply system according to claim 2, characterized in that: The controller (10) is also connected to a third temperature sensor (13) for monitoring the indoor ambient temperature.

4. A composite thermal storage energy supply system according to claim 3, characterized in that: The floor heating water supply pipe is also provided with an auxiliary heater (3), the inlet and outlet of the auxiliary heater (3) are respectively connected to the floor heating water supply pipe through a first auxiliary heating branch pipe (31) and a second auxiliary heating branch pipe (32), a fourth solenoid valve (17) is provided on the first auxiliary heating branch pipe (31), a fifth solenoid valve (18) is provided on the second auxiliary heating branch pipe (32), a third solenoid valve (16) is provided at the heat source outlet of the plate heat exchanger (2), and a sixth solenoid valve (19) is also provided on the floor heating water supply pipe, the sixth solenoid valve (19) is located between the first auxiliary heating branch pipe (31) and the second auxiliary heating branch pipe (32); The water outlet of the heat exchange circulation pump (8) is also connected to the floor heating water supply pipe through a first branch pipe (27), a first electromagnetic valve (14) is provided on the first branch pipe (27), and the intersection of the first branch pipe (27) and the floor heating water supply pipe is located on the side of the liquid flow direction of the third electromagnetic valve (16); The first solenoid valve (14), the third solenoid valve (16), the fourth solenoid valve (17), the fifth solenoid valve (18), and the sixth solenoid valve (19) are respectively connected to the controller (10).

5. A composite thermal storage energy supply system according to claim 4, characterized in that: The heat storage component comprises a tenth solenoid valve (23), a flow meter (9), and a heat storage device (4) which are sequentially arranged on the second branch pipe (28) along the flow direction of the liquid, and a second temperature sensor (12) is also arranged inside the heat storage device (4); The second branch pipe (28) is arranged on the floor heating water supply pipe, and the second branch pipe (28) is located on one side of the intersection of the second auxiliary heating branch pipe (32) and the floor heating water supply pipe along the liquid flow direction; A third branch pipe (29) is also provided at the water outlet end of the heat storage device (4), the third branch pipe (29) is connected to the floor heating water supply pipe, and an eighth solenoid valve (21) is also provided on the third branch pipe (29); A seventh solenoid valve (20) is also provided between the intersection of the second branch pipe (28) and the floor heating water supply pipe and the intersection of the third branch pipe (29) and the floor heating water supply pipe; The seventh solenoid valve (20), the eighth solenoid valve (21), the tenth solenoid valve (23), and the second temperature sensor (12) are respectively connected to the controller (10).

6. A composite thermal storage energy supply system according to claim 5, characterized in that: The water outlet of the heat storage device (4) is also provided with a fourth branch pipe (30), and the fourth branch pipe (30) is connected to the floor heating return pipe; A ninth solenoid valve (22), a buffer water tank (5) and an eleventh solenoid valve (24) are arranged in sequence on the fourth branch pipe (30) along the liquid flow direction, and the buffer water tank (5) is also externally connected to a tap water pipe.

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