A hydraulic distribution device for a renewable energy heating system

Abstract

The utility model relates to a heat supply system technical field, concretely relates to a kind of hydraulic delivery device for renewable energy heat supply system.The hydraulic delivery device for renewable energy heat supply system, including heater, heat supply user, heat supply hydraulic delivery pipe network, heat supply circulating pump and heat exchanger, heater is sequentially connected with heat supply user, heat supply circulating pump by heat supply hydraulic delivery pipe network and constitutes closed loop;The high-temperature water supply end of heater is connected with the high-temperature port of the primary side of heat exchanger by heat storage regulating valve, the low-temperature port of the primary side of heat exchanger is connected with the suction end of heat supply circulating pump by heat storage low-temperature water valve, the discharge end of heat supply circulating pump is connected with the low-temperature port of the primary side of heat exchanger by energy-releasing low-temperature water valve.The utility model solves the problem that heat supply system return water equipment redundancy is complex, adaptability is insufficient, space is occupied greatly, maintenance cost is high, can improve the reliability and stability of heat supply system return water heat supply power.

Description

Technical Field

[0001] This utility model relates to the field of heating system technology, and specifically to a hydraulic transmission and distribution device for a renewable energy heating system. Background Technology

[0002] Renewable energy refers to energy that is continuously replenished and regenerated through natural processes in a relatively short period of time, including hydropower, wind power, solar energy, biomass energy, geothermal energy, ocean energy, etc.

[0003] However, the aforementioned renewable energy sources inevitably suffer from unsustainability, resulting in low utilization rates and significant energy waste.

[0004] Meanwhile, these renewable energy sources and their heating technologies generally suffer from inherent intermittency and volatility, mainly manifested as "day-night / seasonal supply-demand imbalance." For example: air source heat pumps: ambient air temperature fluctuates drastically with day and night and seasons, directly affecting the efficiency of air source heat pumps; solar energy: directly dependent on sunlight intensity and duration, subject to day-night alternation, cloudy / sunny changes, and seasonal differences; wind / hydro energy: although not the main source of direct heating, if used to drive heat pumps or for heating, their output is also limited by natural conditions.

[0005] Therefore, the instability of renewable energy often leads to a mismatch between energy supply and heat load demand in time. In order to overcome this core challenge, it is not only necessary to release the converted and stored energy in stages or continuously according to demand, but also to provide a high-efficiency, large-capacity thermal storage heating system.

[0006] Subsequently, various technical solutions for energy storage emerged, but these existing technical solutions all have the following drawbacks:

[0007] 1. Inadequate energy reserves;

[0008] 2. Energy loss is significant during the energy storage process;

[0009] 3. The stored energy cannot be provided to the next level in a timely or continuous manner;

[0010] For example, in the patent technology solution with publication number CN108917229A, an energy release circulating water pump is used to drive the heat exchanger → heating user circuit, and an energy storage circulating water pump is used to drive the energy storage air source heat pump → heat exchanger circuit. The two pumps are physically connected in parallel and can operate at different times; however, the two pumps cannot be reused and must be switched to operate separately to achieve heat storage and energy release.

[0011] Currently, in thermal storage heating systems, maintaining strict stratification between the high-temperature zone (53℃) and the low-temperature zone (43℃) within the thermal storage tank is a core prerequisite for achieving efficient energy storage / release. To this end, traditional solutions employ a dual-pump physically isolated architecture: the thermal storage pump is dedicated to delivering cold water to the heat exchanger for heat absorption, while the energy release pump is dedicated to delivering hot water to the heat exchanger for heat release, ensuring zero mixing of the hot and cold fluids. However, this architecture results in high costs due to pump and valve redundancy, and the parallel operation of multiple pumps and the switching between them can easily cause hydraulic distribution oscillations.

[0012] Therefore, it is still of great significance to provide a hydraulic distribution device for renewable energy heating systems that provides a single-pump, non-stop switching heat exchanger for primary-side hydraulic distribution of heat storage. Utility Model Content

[0013] This utility model provides a hydraulic transmission and distribution device for renewable energy heating systems, which solves the problems of redundant and complex hydraulic transmission and distribution equipment, insufficient adaptability, large space occupation, and high maintenance costs in heating systems, and can improve the reliability and stability of hydraulic transmission and distribution in heating systems.

[0014] A hydraulic transmission and distribution device for a renewable energy heating system includes a heater, a heating user, a hot water hydraulic transmission and distribution network, a heating circulation pump, and a heat exchanger. The high-temperature water supply end of the heater is sequentially connected to the heating user and the heating circulation pump through the hot water hydraulic transmission and distribution network to form a closed loop. The high-temperature water supply end is connected to the primary high-temperature port of the heat exchanger through a heat storage regulating valve. The primary low-temperature port of the heat exchanger is connected to the suction end of the heating circulation pump through a heat storage low-temperature water valve. The discharge end of the heating circulation pump is connected to the primary low-temperature port of the heat exchanger through an energy release low-temperature water valve.

[0015] In one specific embodiment of this utility model, the hydraulic transmission and distribution device further includes a PLC controller, which is configured to prevent the energy-releasing cryogenic water valve and the heat-storing cryogenic water valve from opening simultaneously.

[0016] In one specific embodiment of this utility model, the PLC controller is electrically connected to the heat storage regulating valve and is used to adjust the opening degree of the heat storage regulating valve.

[0017] In one specific embodiment of this utility model, the hot water power transmission and distribution network is equipped with a temperature sensor, and the temperature sensor is electrically connected to the PLC controller.

[0018] In one specific embodiment of this utility model, the secondary side of the heat exchanger is connected to the heat storage tank through a secondary side single-pump staggered bidirectional delivery pipeline network, so that the secondary side of the heat exchanger can realize heat storage and energy release.

[0019] In one specific embodiment of this utility model, an electronic descaling device is provided at the suction end of the heating circulation pump.

[0020] In one specific embodiment of this utility model, an automatic water replenisher is provided at the suction end of the heating circulation pump.

[0021] In one specific embodiment of this utility model, the automatic water replenisher includes a water replenishment pipe, a pressure tank, a water replenishment pump, a soft water tank, and a fully automatic water softener; one end of the water replenishment pipe is connected to the suction end of the heating circulation pump, and the other end of the water replenishment pipe is provided with the pressure tank and the water replenishment pump; the suction end of the water replenishment pump is connected to the outlet of the soft water tank, and the outlet of the fully automatic water softener is connected to the outlet of the soft water tank.

[0022] In one specific embodiment of this utility model, the heat exchanger includes at least one plate heat exchanger.

[0023] In one specific embodiment of this utility model, the heater is any one or a combination of any of the following: air source heat pump, solar water heater, geothermal heat pump, and water source heat pump.

[0024] The beneficial effects of this utility model are:

[0025] 1. This utility model can realize the heat storage of hot water in the heater by opening the regulating valve 5 and the heat storage low temperature water valve 6, under the operation of the heating circulation pump, which solves the defect of untimely energy storage and enables timely storage of renewable energy.

[0026] 2. In this utility model, the heat storage process and the energy release process flow in opposite directions within the heat exchanger, which solves the problem of large energy loss during energy storage and energy release.

[0027] 3. This utility model closes the thermal storage low-temperature water valve 6 and opens the energy release low-temperature water valve 7 and regulating valve 5, which can realize thermal storage and energy release, and solves the defect that the stored energy cannot be provided to heating users in a timely or continuous manner.

[0028] 4. The single-pump design of the hydraulic distribution device of this utility model not only realizes the heating and heat storage of the heater, but also allows the low-temperature return water to be directly supplied after being heated by the primary side of the heat exchanger after switching the start and stop of the heat storage low-temperature water valve and the energy release low-temperature water valve without changing the single pump operation state. This reduces the number of pumps used for heating return water, avoids the hydraulic oscillation of the heating water caused by the start and stop of the water pump, and the damage to the heating system caused by water hammer, thereby improving the hydraulic reliability and stability of the heating system.

[0029] 5. This utility model can automatically control the opening and closing of the thermal storage low-temperature water valve and the energy release low-temperature water valve through a PLC controller, and at the same time control the opening degree of the thermal storage regulating valve, so as to realize thermal storage and subsequent heating while ensuring the balance between heat supply and demand.

[0030] 6. This utility model can achieve constant pressure water supply to the heating system through a pressure tank and a water pump, ensuring the hydraulic stability of the heating system;

[0031] 7. The auxiliary heater of the hydraulic transmission and distribution device of this utility model can overcome the defects of instability in the use of renewable energy and reduce the manufacturing cost and operating cost of the hydraulic transmission and distribution device of the heating system. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the equipment connection for the hydraulic transmission and distribution device of the present invention used in a renewable energy heating system;

[0033] Figure 2 For the appendix Figure 1 Layout diagram of the secondary side piping system and auxiliary structures of the intermediate heat exchanger;

[0034] Figure 3 This is a schematic diagram of the secondary side single-pump staggered bidirectional delivery pipeline structure of the heat exchanger of this utility model;

[0035] Figure 4 This is a schematic diagram of the heat exchanger of this utility model.

[0036] The attached diagram lists the components represented by each number as follows:

[0037] 1. Heater; 2. Heating user; 3. Heating circulation pump; 4. Heat exchanger; 41. Primary side high temperature port; 42. Primary side low temperature port; 43. Secondary side high temperature port; 44. Secondary side low temperature port; 5. Thermal storage regulating valve; 6. Thermal storage low temperature water valve; 7. Energy release low temperature water valve; 8. PLC controller; 9. Temperature sensor; 10. Secondary side single pump staggered bidirectional delivery pipeline network; 11. Thermal storage tank; 12. Electronic descaling device; 13. Water supply pipeline; 14. Pressure tank; 15. Water supply pump; 16. Soft water tank; 17. Fully automatic water softener. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0039] Example

[0040] Based on the appendix Figure 1-3A hydraulic transmission and distribution device for a renewable energy heating system includes a heater 1, a heating user 2, a hot water hydraulic transmission and distribution network, a heating circulation pump 3, and a heat exchanger 4. The heater 1 is connected to the heating user 2 and the heating circulation pump 3 in sequence through the hot water hydraulic transmission and distribution network to form a closed loop. The high-temperature water supply end of the heater 1 is connected to the primary high-temperature port 41 of the heat exchanger 4 through a heat storage regulating valve 5. The primary low-temperature port 42 of the heat exchanger 4 is connected to the suction end of the heating circulation pump 3 through a heat storage low-temperature water valve 6. The discharge end of the heating circulation pump 3 is connected to the primary low-temperature port 42 of the heat exchanger 4 through an energy release low-temperature water valve 7.

[0041] It should be noted that the hot water power transmission and distribution network includes heating pipes and return water pipes. The high-temperature water supply end of the heater 1 is connected to the heating user 2 through the heating pipe, and the return water of the heating user 2 is connected to the suction end of the heating circulation pump 3 through the return water pipe.

[0042] It should also be noted that the heat storage regulating valve 5 is installed on the heat storage pipeline. One end of the heat storage pipeline is connected to the primary side high temperature port 41, and the other end is connected to the high temperature water supply end of the heater 1 or to the heating pipeline. The distance between the primary side high temperature port 41 and the high temperature water supply end of the heater 1 and the heating pipeline is determined by the distance between them. Correspondingly, the heat storage low temperature water valve 6 and the energy release low temperature water valve 7 are each configured on parallel pipelines.

[0043] In some instances, the hydraulic distribution device also includes a PLC controller 8, which is configured to prevent the energy-releasing cryogenic water valve 7 and the heat-storing cryogenic water valve 6 from opening simultaneously.

[0044] In some instances, the PLC controller 8 is electrically connected to the thermal storage regulating valve 5 to adjust the opening degree of the thermal storage regulating valve 5.

[0045] In some instances, the hot water power transmission and distribution network is equipped with a temperature sensor 9, which is electrically connected to the thermal storage regulating valve via a PLC controller 8. The temperature sensor 9 is used to collect the temperature parameters of the low-temperature heating return water and transmit them to the PLC controller 8. The PLC controller 8 uses a built-in algorithm to control the opening, closing, and opening degree of the regulating valve to achieve a balance between the supply and demand of thermal storage and heating users 2.

[0046] In some instances, the secondary side of heat exchanger 4 is connected to heat storage tank 11 via a secondary side single-pump staggered bidirectional delivery network 10, enabling the secondary side of heat exchanger 4 to store heat and release energy.

[0047] It should be noted that the secondary-side single-pump staggered bidirectional delivery network 10 includes a high-temperature heat storage fluid pipeline, a low-temperature energy release fluid pipeline, and a circulating delivery pump; one end of the high-temperature heat storage fluid pipeline is connected to the secondary-side high-temperature port 43 of the heat exchanger 4, and the other end is connected to the high-temperature fluid port of the heat storage tank 11; one end of the low-temperature energy release fluid pipeline is connected to the secondary-side low-temperature port 44 of the heat exchanger 4, and the other end is connected to the low-temperature fluid port of the heat storage tank 11; the suction end of the circulating delivery pump is connected to the low-temperature fluid port through a heat storage low-temperature fluid suction pipeline; the discharge end of the circulating delivery pump is connected to the secondary-side low-temperature port 44 through a heat storage low-temperature fluid discharge pipeline; the suction end of the circulating delivery pump is also connected to the high-temperature fluid port through an energy release high-temperature fluid suction pipeline. The discharge end of the circulating pump is also connected to the secondary high-temperature port 43 through a high-temperature energy release fluid discharge pipe. A high-temperature energy storage fluid valve is installed on the high-temperature energy storage fluid pipe, a low-temperature energy release fluid valve is installed on the low-temperature energy release fluid pipe, a low-temperature energy storage fluid suction valve is installed on the low-temperature energy storage fluid suction pipe, a low-temperature energy storage fluid discharge valve is installed on the low-temperature energy storage fluid discharge pipe, a high-temperature energy release fluid suction valve is installed on the high-temperature energy release fluid suction pipe, and a high-temperature energy release fluid discharge valve is installed on the high-temperature energy release fluid discharge pipe. The circulating pump is a centrifugal pump; preferably, the circulating pump is a variable frequency centrifugal pump to achieve dynamic adjustment of the heat storage and energy release heat exchange process, ensuring temperature stability and a stable temperature difference between the high-temperature and low-temperature zones.

[0048] It should also be noted that in the heat storage mode of the heating system, the opening and closing states of the secondary side pump valves of heat exchanger 4 are as follows: the high-temperature heat storage fluid valve, the low-temperature heat storage fluid suction valve, and the heat storage fluid discharge valve are opened, while the energy storage high-temperature fluid suction valve, the energy release high-temperature fluid discharge valve, and the low-temperature energy release fluid valve are closed simultaneously; the circulating transfer pump is started to input the low-temperature fluid in the low-temperature zone at the bottom of the heat storage tank 11 into the heat exchanger 4 for heat exchange to form a 53°C high-temperature fluid. Under the conveying thrust of the circulating transfer pump, the 53°C high-temperature fluid returns to the high-temperature zone at the top of the heat storage tank 11 for storage through the high-temperature heat storage fluid pipeline; as the circulating transfer pump continues to operate, the boundary line between the high-temperature zone at the top and the low-temperature zone at the bottom of the heat storage tank 11 gradually shifts downward, thereby storing more 53°C high-temperature fluid for subsequent energy release;

[0049] In the energy release mode of the heating system, the opening and closing states of the secondary side pump valves of heat exchanger 4 are as follows: the low-temperature energy release fluid valve, the energy storage high-temperature fluid suction valve, and the energy release high-temperature fluid discharge valve are open, while the high-temperature heat storage fluid valve, the heat storage low-temperature fluid suction valve, and the heat storage low-temperature fluid discharge valve are closed; the circulating transfer pump continues the start-up state of the energy storage mode; the 53°C high-temperature fluid in the top high-temperature zone of the heat storage tank 11 is input into the heat exchanger 4 for heat exchange to form a 43°C low-temperature fluid. Under the conveying thrust of the circulating transfer pump, the 43°C low-temperature fluid returns to the bottom low-temperature zone of the heat storage tank 11 through the low-temperature heat storage fluid pipeline for storage; as the circulating transfer pump continues to operate in the energy release mode, the boundary line between the top high-temperature zone and the bottom low-temperature zone of the heat storage tank 11 gradually shifts upward, thereby continuously releasing more stored heat energy.

[0050] In some instances, the suction end of the heating circulation pump 3 is equipped with an electronic descaling device 12.

[0051] In some instances, the suction end of the heating circulation pump 3 is equipped with an automatic water replenisher.

[0052] In some examples, the automatic water replenishment device includes a water replenishment pipe 13, a pressure tank 14, a water replenishment pump 15, a soft water tank 16, and a fully automatic water softener 17; one end of the water replenishment pipe 13 is connected to the suction end of the heating circulation pump 3, and the other end of the water replenishment pipe 13 is equipped with a pressure tank 14 and a water replenishment pump 15. The suction end of the water replenishment pump 15 is connected to the outlet of the soft water tank 16, and the outlet of the fully automatic water softener 17 is connected to the outlet of the soft water tank 16.

[0053] It should be noted that, in order to ensure a stable return water temperature for the heater 1, the soft water temperature in the soft water tank 16 is controlled at 41-45℃.

[0054] In some instances, heat exchanger 4 includes at least one plate heat exchanger; when there are multiple plate heat exchangers, the multiple plate heat exchangers are arranged in parallel, and each plate heat exchanger is provided with a primary side high temperature port, a primary side low temperature port, a secondary side high temperature port and a secondary side low temperature port.

[0055] In some instances, the heater 1 is any one or a combination of several of the following: an air source heat pump, a solar water heater, a geothermal heat pump, and a water source heat pump; preferably, it is an air source heat pump.

[0056] In some instances, in order to ensure that the heat exchanger 4 can store heat and release energy on the primary side with a single heating circulation pump 3 as the core, the heating circulation pump 3 is equipped with a backup heating circulation pump 3, so as to "one for backup and one for use".

[0057] The present invention relates to the control of the primary side return water heating of heat exchanger 4, specifically as follows:

[0058] Heating mode of heater 1: The heat storage regulating valve 5, the heat storage low temperature water valve 6 and the energy release low temperature water valve 7 are closed. The 55°C high temperature water at the high temperature water supply end of heater 1 is supplied to the heating user 2 under the output pressure of the heating circulation pump 3. At the same time, the heating circulation pump 3 draws in the 45°C low temperature water of the heating user 2 to form a closed heating cycle. The automatic water replenisher automatically replenishes water at constant pressure at the suction end of the heating circulation pump 3.

[0059] Heat storage mode: Open the heat storage low temperature water valve 6, and adjust the opening of the heat storage regulating valve 5 through the PLC controller 8, so that a part of the 55°C high temperature water from the high temperature water supply end of the heater 1 enters the heat exchanger 4 from the primary side high temperature port 41 for heat exchange and heat storage to obtain 45°C cold water, which is combined with the return water of the heating user 2 and sucked into the heating circulation pump 3, and finally output to the heater 1 to be heated to 55°C high temperature water; the 55°C high temperature water input from the primary side high temperature port 41 of the heat exchanger 4 and the 43°C low temperature fluid input from the secondary side fluid port 44 of the heat exchanger 4 exchange heat in a counter-current convection to achieve heat storage;

[0060] Energy release mode: Close the thermal storage low-temperature water valve 6, open the energy release low-temperature water valve 7, and adjust the opening of the thermal storage regulating valve 5 through the PLC controller 8; the 41℃ low-temperature water sucked in by the heating circulation pump 3 enters the heat exchanger 4 through the energy release low-temperature water valve 7 and the primary side low-temperature port 42 in sequence to exchange heat into 51℃ high-temperature water, and then supplies it to the heating user 2 through the primary side high-temperature port 41 and the thermal storage regulating valve 5 in sequence; the 41℃ low-temperature water input at the primary side low-temperature port 42 of the heat exchanger 4 and the 53℃ high-temperature fluid input at the secondary side high-temperature port 43 of the heat exchanger 4 exchange heat in a counter-current convection to achieve energy release.

[0061] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic transmission and distribution device for a renewable energy heating system, comprising a heater (1), a heating user (2), a hot water hydraulic transmission and distribution network, a heating circulation pump (3), and a heat exchanger (4), wherein the high-temperature water supply end of the heater (1) is sequentially connected to the heating user (2) and the heating circulation pump (3) through the hot water hydraulic transmission and distribution network to form a closed loop; characterized in that, The high-temperature water supply end is connected to the primary high-temperature port (41) of the heat exchanger (4) through the heat storage regulating valve (5). The primary low-temperature port (42) of the heat exchanger (4) is connected to the suction end of the heating circulation pump (3) through the heat storage low-temperature water valve (6). The discharge end of the heating circulation pump (3) is connected to the primary low-temperature port (42) of the heat exchanger (4) through the energy release low-temperature water valve (7).

2. The hydraulic transmission and distribution device for a renewable energy heating system according to claim 1, characterized in that: The hydraulic transmission and distribution device also includes a PLC controller (8), which is configured to prevent the energy release low-temperature water valve (7) and the heat storage low-temperature water valve (6) from opening simultaneously.

3. The hydraulic transmission and distribution device for a renewable energy heating system according to claim 2, characterized in that: The PLC controller (8) is also electrically connected to the heat storage regulating valve (5) for adjusting the opening degree of the heat storage regulating valve (5).

4. The hydraulic transmission and distribution device for a renewable energy heating system according to claim 3, characterized in that: The hot water supply pipeline is equipped with a temperature sensor (9), which is electrically connected to the regulating valve through the PLC controller (8).

5. The hydraulic transmission and distribution device for a renewable energy heating system according to claim 1, characterized in that: The secondary side of the heat exchanger (4) is connected to the heat storage tank (11) through a secondary side single-pump staggered bidirectional delivery pipeline (10), so that the secondary side of the heat exchanger (4) can realize heat storage and energy release.

6. The hydraulic transmission and distribution device for a renewable energy heating system according to claim 1, characterized in that: The heating circulation pump (3) is equipped with an electronic descaling device (12) at its suction end.

7. The hydraulic transmission and distribution device for a renewable energy heating system according to claim 1, characterized in that: The heating circulation pump (3) is equipped with an automatic water replenisher at its suction end.

8. The hydraulic transmission and distribution device for a renewable energy heating system according to claim 7, characterized in that: The automatic water replenishment device includes a water replenishment pipe (13), a pressure tank (14), a water replenishment pump (15), a soft water tank (16), and a fully automatic water softener (17); one end of the water replenishment pipe (13) is connected to the suction end of the heating circulation pump (3), and the other end of the water replenishment pipe (13) is provided with the pressure tank (14) and the water replenishment pump (15). The suction end of the water replenishment pump (15) is connected to the outlet of the soft water tank (16), and the outlet of the fully automatic water softener (17) is connected to the outlet of the soft water tank (16).

9. The hydraulic transmission and distribution device for a renewable energy heating system according to claim 1, characterized in that: The heat exchanger (4) includes at least one plate heat exchanger.

10. The hydraulic transmission and distribution device for a renewable energy heating system according to claim 1, characterized in that: The heat generator (1) is any one or a combination of any of the following: air source heat pump, solar water heater, geothermal heat pump and water source heat pump.

Images