An auxiliary heating system based on a pvt system

Abstract

This application belongs to the field of auxiliary heating and discloses an auxiliary heating system based on a PVT system, including a PVT system, a heat pump unit module, a secondary centralized heating network, and connected PVT power management module, secondary network heat supply module, and collaborative control module. The PVT power management module processes the electrical energy of the PVT system and supplies power to the heat pump; the secondary network heat supply module transfers the heat energy generated by the PVT and heat pump to the secondary network; the collaborative control module determines the operating strategy based on the real-time heat load of the secondary network and controls each module. This solution achieves dual utilization of PVT electrical and thermal energy, improves the comprehensive utilization rate of new energy to over 85%, dynamically adjusts the operating strategy to minimize the heating demand of the power plant, and ensures heating stability, thus achieving both energy saving and emission reduction benefits.

Description

Technical Field

[0001] This application belongs to the field of auxiliary heating, and specifically relates to an auxiliary heating system based on a PVT system. Background Technology

[0002] Driven by the "dual carbon" goals, centralized heating systems face the core demands of "carbon reduction and emission reduction, and energy structure optimization." Currently, the heat supply of the secondary network of centralized heating (hereinafter referred to as "secondary network") mainly relies on thermal power units or coal-fired boiler rooms, with a high proportion of fossil energy and high carbon emission intensity. At the same time, during the peak heating season in winter, the heating load of power plants is concentrated, requiring high power generation output to ensure heating, which restricts the flexibility of power generation and increases energy consumption. Summary of the Invention

[0003] To address the aforementioned issues, this application provides an auxiliary heating system based on a PVT system. This solution dynamically adjusts the operating strategy to minimize the power plant's heating demand while ensuring heating stability, thus achieving both energy conservation and emission reduction benefits.

[0004] To address the aforementioned technical problems, the first aspect of this disclosure proposes an auxiliary heating system based on a PVT system, the heating system comprising: PVT system, heat pump unit module and secondary centralized heating network; The PVT power management module, which is connected to the PVT system and the heat pump unit module, is used to process the electrical energy generated by the PVT system and then supply power to the heat pump unit module. The secondary heating network supplementary heat exchange module, which is connected to the PVT system, the heat pump unit module and the secondary centralized heating network respectively, is used to transfer the heat energy generated by the PVT system and the heat pump unit module to the secondary centralized heating network. The collaborative control module, which is connected to the PVT system, the heat pump unit module, the secondary central heating network, and the secondary network heat replenishment module respectively, is used to determine the operating strategy of the PVT system, the heat pump unit module, and the secondary network heat replenishment module based on the real-time heat load of the secondary central heating network, and to control them according to the operating strategy.

[0005] According to a preferred embodiment of this disclosure, the heating system further includes: An auxiliary system status monitoring module, which is connected to the PVT system, heat pump unit module, PVT power management module, and collaborative control module respectively, is used to monitor the equipment operating status of the PVT system, heat pump unit module, and PVT power management module, and send the equipment operating status to the collaborative control module.

[0006] According to a preferred embodiment of this disclosure, the collaborative control module is further configured to determine whether the equipment is abnormal based on the equipment's operating status, and to issue a fault warning and generate an equipment maintenance prompt when the equipment is abnormal.

[0007] According to a preferred embodiment of this disclosure, the heating system further includes: The PVT system is connected to the secondary network heat exchange module through the PVT heat exchange module; The PVT heat exchange module is used to transfer the heat energy produced by the PVT system to the secondary network heat replenishment module.

[0008] According to a preferred embodiment of this disclosure, the secondary network heat replenishment and confluence module receives the heat energy transmitted by the PVT heat exchange module and the heat energy generated by the heat pump unit module; and transmits it to the original secondary network water supply pipe in the centralized heating secondary network, and outputs it to the secondary network end user module.

[0009] According to a preferred embodiment of this disclosure, the heating system further includes: a secondary heating network load monitoring module connected to the secondary centralized heating network and the collaborative control module, used to monitor the operating parameters of the secondary centralized heating network and calculate the real-time heat load of the secondary centralized heating network.

[0010] According to a preferred embodiment of this disclosure, the heating system further includes: The heat pump heating output module, which is connected to the heat pump unit module and the secondary network heat replenishment junction module, is used to transfer the heat energy generated by the heat pump unit module to the secondary network heat replenishment junction module.

[0011] According to a preferred embodiment of this disclosure, the collaborative control module is specifically used to control the PVT power management module to drive the heat pump unit module through the power generated by the PVT system when the illumination meets the preset requirements and the real-time heat load is lower than the preset load; and to control the secondary network heat replenishment and combination module to transfer the heat energy generated by the PVT system and the heat pump unit module to the secondary centralized heating network.

[0012] According to a preferred embodiment of this disclosure, the PVT power management module includes: an energy storage submodule for storing the electrical energy generated by the PVT system; The collaborative control module is specifically used to control the PVT power management module to discharge to the heat pump unit module through the energy storage submodule when the light intensity does not meet the preset requirements and the real-time heat load is higher than the preset load, thereby driving the heat pump unit module.

[0013] According to a preferred embodiment of this disclosure, the collaborative control module is specifically used to control the PVT power management module to discharge to the heat pump unit module through the energy storage submodule when the PVT system fails, thereby driving the heat pump unit module; and to control the secondary network heat replenishment and combination module to transfer the heat energy generated by the PVT system to the secondary centralized heating network when the heat pump unit module fails.

[0014] Compared with existing technologies, this application has the following advantages: An auxiliary heating system based on a PVT system includes a PVT system, a heat pump unit module, a secondary centralized heating network, and connected PVT power management module, secondary network heat replenishment module, and collaborative control module. The PVT power management module processes the electrical energy of the PVT system and supplies power to the heat pump; the secondary network heat replenishment module transfers the heat energy generated by the PVT and heat pump to the secondary network; the collaborative control module determines the operating strategy based on the real-time heat load of the secondary network and controls each module. This solution achieves dual utilization of PVT electrical and thermal energy, improves the comprehensive utilization rate of new energy to over 85%, dynamically adjusts the operating strategy to maximize the reduction of power plant heating demand, and ensures heating stability, thus achieving both energy saving and emission reduction benefits.

[0015] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of one of the structures of an auxiliary heating system based on a PVT system according to an embodiment of the present disclosure is shown; Figure 2 A second schematic diagram of an auxiliary heating system based on a PVT system according to an embodiment of the present disclosure is shown. Figure 3 A third schematic diagram of an auxiliary heating system based on a PVT system according to an embodiment of the present disclosure is shown. Figure 4 A fourth schematic diagram of an auxiliary heating system based on a PVT system according to an embodiment of the present disclosure is shown. Figure 5Fifthly, a schematic diagram of an auxiliary heating system based on a PVT system according to an embodiment of the present disclosure is shown. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The same reference numerals in the accompanying drawings denote the same or similar elements, components, or parts, and therefore repeated descriptions of the same or similar elements, components, or parts may be omitted below. It should also be understood that although qualifiers such as first, second, third, etc., indicating numbers may be used herein to describe various devices, elements, components, or parts, these devices, elements, components, or parts should not be limited by these qualifiers. That is, these qualifiers are only used to distinguish one from another. For example, a first device may also be referred to as a second device, without departing from the essence of the technical solution of this disclosure. Furthermore, the terms "and / or" and "and / or" refer to all combinations including the first or more of the listed items.

[0020] Please see Figure 1 , Figure 1 This is one of the schematic diagrams of an auxiliary heating system based on a PVT system provided in this disclosure, such as... Figure 1 As shown, the heating system includes: a PVT system, heat pump unit modules, and a secondary centralized heating network.

[0021] In this embodiment, the PVT system, namely the PVT photovoltaic-thermal integrated system, is the core source of new energy for the system, simultaneously producing electrical and thermal energy to provide an energy foundation for auxiliary heating. Specific functions include: 1) Composed of several PVT collector arrays, each collector housing a photovoltaic panel (producing DC electricity) and a heat-conducting medium channel (for circulating antifreeze and absorbing waste heat from the photovoltaic panels and solar radiation); 2) Output parameters: PVT DC power P_pvt (0~50kW, varying according to light intensity), PVT heat-conducting medium outlet temperature T_pvt_out (30~60℃, increasing with sufficient sunlight); 3) Connection relationship: PVT DC power → PVT power management module, PVT heat-conducting medium channel → PVT heat exchange module.

[0022] In this embodiment, the heat pump unit module uses PVT electricity as its main power source to absorb heat (air / soil) from the environment, raise its temperature, and provide supplementary heating for the secondary network. Specific functions include: 1) Type selection: Air source heat pumps are preferred (strong environmental adaptability), while air-ground source composite heat pumps can be selected for low-temperature areas (below -10℃); 2) Heating performance calculation: Heat pump heating capacity Q_hp_heat = P_heatpump × COP (COP is the coefficient of performance, 3.0~4.0 at normal temperature, 1.8~2.5 at low temperature), where P_heatpump mainly comes from the power supply of the 2PVT power management modules; 3) Operation control: Adjusting the number of operating heat pumps (1~3 units, single unit heating capacity 50~100kW) and output according to the instructions of the collaborative control module; 4) Connection relationship: Receiving AC power from the PVT power management module → absorbing environmental heat (air / soil) → outputting high-temperature hot water → heat pump heating output module, feeding back COP and Q_hp_heat data → collaborative control module.

[0023] In this embodiment, the secondary heating network, or the secondary network of the centralized heating system, is a crucial link connecting the heat source (such as thermal power units, coal-fired boiler rooms, or new energy auxiliary heating systems) with end users (such as residential buildings and commercial buildings). It transports and distributes the heat generated by the heat source to each user through a pipeline network to meet winter heating needs. The secondary network typically includes supply water pipes, return water pipes, and corresponding control equipment, using circulating water to achieve heat transfer and distribution. In traditional heating models, the heat generated by the secondary network is highly dependent on fossil fuels, while the introduction of new energy auxiliary heating systems is gradually optimizing its energy structure and improving heating efficiency and environmental friendliness.

[0024] In this embodiment, the PVT power management module, which is connected to the PVT system and the heat pump unit module, is used to process the electrical energy generated by the PVT system and then supply power to the heat pump unit module.

[0025] In this embodiment, a PVT power management module is set up to connect the PVT system and the heat pump unit module. The DC power generated by the PVT system is rectified and inverted to convert it into stable AC power required by the heat pump unit and power it. This realizes the efficient utilization of PVT system power, avoids power conversion losses, and provides reliable power support for the heat pump unit, thereby improving the energy utilization efficiency and operational stability of the entire auxiliary heating system.

[0026] In this embodiment, the PVT power management module processes the direct current power generated by PVT to provide stable power for the heat pump. The excess power can be connected to the grid or stored. The specific functions include: 1) Built-in rectifier and inverter: Convert the PVT direct current power into alternating current (220V / 380V) to meet the power consumption requirements of the heat pump unit; 2) Built-in energy storage sub-module (such as a lithium battery pack): When P_pvt > the power consumption of the heat pump P_heatpump, the excess power is stored in the energy storage sub-module (storage capacity 50 - 100 kWh); when P_pvt < P_heatpump, the energy storage sub-module discharges to supplement the power to avoid relying on grid power supply; 3) Connection relationship: Receive the direct current power from the PVT system → Output alternating current → Heat pump unit, and the energy storage sub-module → Bidirectional power supply to the heat pump unit.

[0027] In this embodiment, the secondary network heat supplement confluence module connected to the PVT system, the heat pump unit module and the secondary network of central heating respectively is used to transfer the heat energy generated by the PVT system and the heat pump unit module to the secondary network of central heating.

[0028] In this embodiment, the secondary network heat supplement confluence module is set to be connected to the PVT system, the heat pump unit module and the secondary network of central heating respectively. Through devices such as built-in three-way regulating valves, the heat conducting medium of the PVT system and the heat energy output by the heat pump unit are integrated and transferred to the secondary network of central heating; it realizes the efficient convergence and precise supply of the heat energy of the PVT system and the heat pump unit, ensures the stability of the heat energy supply of the secondary network of central heating, and at the same time improves the utilization rate of new energy in the heating system.

[0029] In this embodiment, the secondary network heat supplement confluence module: As the connection node between the auxiliary heating system and the original secondary network of central heating, it integrates the heat supplement of PVT and the heat pump and supplements it to the secondary network as needed. The specific functions include: 1) Built-in three-way regulating valve: One side is connected to the original secondary network supply pipe (from the power plant heat exchange station, temperature T_org_sup), one side is connected to the supplementary hot water of the PVT heat energy heat exchange module (T_supp_out), and one side is connected to the heat pump hot water of the heat pump heating output module (T_hp_out); 2) Mixed water temperature control: According to the target water supply temperature of the secondary network T_target (such as 50 - 60 °C), adjust the opening of the three-way valve so that the mixed water temperature T_mix = (Q_org × T_org_sup + Q_pvt_heat + Q_hp_heat) / (Q_org + Q_pvt_heat + Q_hp_heat) = T_target (Q_org is the heat supply of the original secondary network, Q_hp_heat is the heat supply of the heat pump); 3) Connection relationship: Receive the supplementary hot water from the PVT heat exchange module → Receive the heat pump hot water from the heat pump output module → Confluence with the original secondary network supply pipe → Output to the end users of the secondary network, and at the same time feedback the T_mix data → Synergistic control module.

[0030] In this embodiment, the collaborative control module, which is connected to the PVT system, the heat pump unit module, the secondary central heating network, and the secondary network heat replenishment module respectively, is used to determine the operating strategies of the PVT system, the heat pump unit module, and the secondary network heat replenishment module based on the real-time heat load of the secondary central heating network, and to control them according to the operating strategies.

[0031] In this embodiment, a collaborative control module is set up and connected to the PVT system, the heat pump unit module, the secondary centralized heating network, and the secondary network heat replenishment module, respectively. By collecting the heat load data of the secondary network in real time, the operating strategies of each module (such as the heat replenishment ratio and equipment start-up and shutdown) are dynamically formulated and adjusted to achieve precise control. The collaborative heating efficiency of new energy and heat pump is optimized, the heat demand of the power plant is minimized, and the stability and adaptability of the secondary network heating are ensured.

[0032] In this embodiment, the collaborative control module is the core control unit of the system, integrating data from various modules and dynamically adjusting the operation strategy of the auxiliary heating system. Specific functions include: 1) Data integration: receiving Q_org_load from the secondary network load monitoring module, Q_pvt_heat from the PVT heat exchange module, Q_hp_heat from the heat pump unit, and equipment status data from the status monitoring module; 2) Operation strategy formulation: Strategy 1 (sufficient sunlight + low secondary network load): When P_pvt is sufficient, PVT electricity is prioritized to drive the heat pump (COP≥3.0), and PVT heat energy directly supplements the secondary network. At this time, Q_org (heat supply from the power plant) = Q_org_load - Q_pvt_heat - Q_hp_heat, maximizing the reduction of power plant demand; Strategy 2 (insufficient sunlight + high secondary network load) (Load): If P_pvt is insufficient, the energy storage submodule discharges to supplement the heat pump's power, while appropriately increasing the heat pump's COP (e.g., through environmental heat exchange optimization). If Q_pvt_heat + Q_hp_heat < heat replenishment demand, a small amount of grid power can be used to drive the heat pump. Strategy 3 (Equipment Failure): If the PVT fails, only the heat pump will run (prioritizing energy storage power supply). If the heat pump fails, only PVT heat energy will be used for heat replenishment, while feedback to the power plant indicates that Q_org needs to be increased. 3) Command Output: Send energy storage charging and discharging commands to the power management module, send power commands to the heat pump unit, send valve opening commands to the heat replenishment and merging module, and send fault handling commands to the status monitoring module.

[0033] Specifically, when the illumination meets the preset requirements and the real-time heat load is lower than the preset load, the PVT power management module is controlled to drive the heat pump unit module through the power generated by the PVT system; and the secondary network heat replenishment module is controlled to transfer the heat energy generated by the PVT system and the heat pump unit module to the secondary centralized heating network.

[0034] In this embodiment, when there is sufficient sunlight and the real-time heat load of the secondary centralized heating network is lower than the preset value, the collaborative control module activates the strategy, instructing the PVT power management module to use the power generated by the PVT system to drive the heat pump unit to operate. At the same time, it directs the secondary network heat replenishment and combination module to integrate the heat energy directly supplied by the PVT system and the heat energy boosted by the heat pump unit and deliver it to the secondary centralized heating network. Through the synergistic utilization of light, electricity and heat, the dual heating capacity of direct supply of new energy and heat pump efficiency is maximized, which significantly reduces the heat supply from the power plant while meeting the needs of the secondary network.

[0035] In this embodiment, the PVT power management module includes an energy storage submodule for storing the electrical energy generated by the PVT system.

[0036] Specifically, when the illumination does not meet the preset requirements and the real-time heat load is higher than the preset load, the PVT power management module is controlled to discharge to the heat pump unit module through the energy storage submodule, thereby driving the heat pump unit module.

[0037] In this embodiment, when there is insufficient sunlight and the real-time heat load of the secondary centralized heating network exceeds a preset value, the collaborative control module activates an emergency strategy, instructing the PVT power management module to call the electrical energy stored in the energy storage submodule to supply power to the heat pump unit, driving the heat pump unit to operate to supplement the heat energy; by smoothing out the fluctuations in new energy sources through the energy storage system, the heat pump can be ensured to provide continuous and stable heating under low sunlight and high load conditions, while reducing the dependence on grid power and maintaining the overall heating capacity and energy-saving benefits of the system.

[0038] Specifically, when the PVT system fails, the PVT power management module is controlled to discharge to the heat pump unit module through the energy storage submodule, thereby driving the heat pump unit module; when the heat pump unit module fails, the heat energy generated by the PVT system is transferred to the centralized heating secondary network by controlling the secondary network heat replenishment and combination module.

[0039] In this embodiment, when the PVT system fails, the collaborative control module instructs the PVT power management module to call the energy storage submodule to discharge and drive the heat pump unit to operate; when the heat pump unit fails, the secondary network heat replenishment and combiner module is controlled to directly transmit the heat energy of the PVT system to the secondary central heating network; through the energy storage redundancy design and the direct heat supply path, the fault-tolerant operation of the auxiliary heating system is realized, ensuring that the basic heating energy can still be maintained when a single device fails.

[0040] In this embodiment, the proposed solution provides an auxiliary heating system based on a PVT system, including a PVT system, a heat pump unit module, a secondary centralized heating network, and connected PVT power management module, secondary network heat supply module, and collaborative control module. The PVT power management module processes the PVT system's electrical energy and supplies power to the heat pump; the secondary network heat supply module transfers the heat energy generated by the PVT and heat pump to the secondary network; the collaborative control module determines the operating strategy based on the real-time heat load of the secondary network and controls each module. This solution achieves dual utilization of PVT electrical and thermal energy, increasing the comprehensive utilization rate of new energy sources to over 85%, dynamically adjusting the operating strategy to minimize the power plant's heating demand, while ensuring heating stability, and combining energy saving and emission reduction benefits.

[0041] like Figure 2 As shown, Figure 2 This is a second schematic diagram of an auxiliary heating system structure based on a PVT system provided in this disclosure. In this embodiment, the heating system further includes an auxiliary system status monitoring module connected to the PVT system, the heat pump unit module, the PVT power management module, and the collaborative control module, respectively. This module monitors the operating status of the PVT system, the heat pump unit module, and the PVT power management module, and sends the operating status to the collaborative control module.

[0042] In this embodiment, an auxiliary system status monitoring module is set up and connected to the PVT system, heat pump unit module, PVT power management module and collaborative control module respectively. It monitors the key operating parameters of each module equipment (such as temperature, pressure, flow rate, SOC, etc.) in real time and transmits the data to the collaborative control module. By comprehensively sensing the equipment status, it provides the collaborative control module with fault warning and operation optimization decision-making basis to ensure the safe and stable operation of the system.

[0043] In this embodiment, the collaborative control module is also used to determine whether the equipment is abnormal based on the equipment's operating status, and to issue a fault warning and generate an equipment maintenance prompt when the equipment is abnormal.

[0044] In this embodiment, the auxiliary system status monitoring module monitors the operating status of auxiliary equipment such as PVT, heat pump, and energy storage, and provides fault warnings and maintenance prompts. Specific functions include: 1) Monitoring parameters: PVT collector temperature (to prevent overheating damage), heat pump compressor pressure (to prevent overpressure faults), energy storage submodule SOC (state of charge, 0%~100%), and pipeline pressure and flow rate of each module; 2) Fault determination: When the PVT collector temperature > 80℃, the heat pump compressor pressure > 2.5MPa, and the energy storage SOC < 10%, a warning signal is triggered; Connection relationship: Collecting status data from the PVT system, power management module, and heat pump unit → transmitting to the collaborative control module, receiving maintenance instructions from the collaborative control module → generating equipment maintenance prompts.

[0045] like Figure 3 As shown, Figure 3 This is the third schematic diagram of an auxiliary heating system based on a PVT system provided in this disclosure. In this embodiment, the heating system further includes: the PVT system is connected to the secondary network supplementary heat exchange module through a PVT heat exchange module; the PVT heat exchange module is used to transfer the heat energy produced by the PVT system to the secondary network supplementary heat exchange module.

[0046] In this embodiment, a PVT heat exchange module is added to the heating system as an intermediate connection unit, enabling the PVT system to achieve heat energy coupling and transmission with the secondary network heat replenishment module through this module. The medium and low temperature heat energy generated by the PVT system is converted into heat medium parameters that meet the heat replenishment requirements of the secondary network through a high-efficiency heat exchange device. This realizes the cascade utilization of PVT heat energy, avoids heat loss or parameter mismatch problems that may be caused by direct connection, and simplifies the system heat energy allocation path.

[0047] In this embodiment, the PVT heat exchange module transfers the heat from the PVT heat transfer medium to the secondary network heat replenishment circuit, thereby enabling the PVT heat energy to directly replenish the secondary network. Specific functions include: 1) Built-in plate heat exchanger: PVT heat transfer medium flows on one side (inlet T_pvt_out, outlet T_pvt_in), and secondary network supplementary heating circulating water flows on the other side (inlet T_supp_in, outlet T_supp_out); 2) Heat exchange calculation: Q_pvt_heat=m_pvt×c_pvt×(T_pvt_out-T_pvt_in)=m_supp×c_water×(T_supp_out-T_supp_in) (m_pvt is the PVT medium flow rate, c_pvt is the specific heat capacity of the medium, m_supp is the supplementary heating circulating water flow rate, and c_water is the specific heat capacity of water); Connection relationship: Receive heat transfer medium from PVT system → exchange heat through heat exchanger → heat transfer medium returns to PVT system, supplementary heating circulating water → secondary network supplementary heating junction module.

[0048] In this embodiment, the secondary network heat replenishment and confluence module receives the heat energy transmitted by the PVT heat exchange module and the heat energy generated by the heat pump unit module; and transmits it to the original secondary network water supply pipe in the centralized heating secondary network, and outputs it to the secondary network end user module.

[0049] In this embodiment, the secondary network end-user module is the terminal heat-consuming unit of the original centralized heating secondary network. It receives the mixed hot water after convergence to meet heating needs. Specific functions include: 1) including end users such as residential buildings and commercial buildings, as well as user-end radiators / underfloor heating equipment; 2) heat feedback: collecting T_room data through a room temperature sensor to determine the heating effect; connection relationship: receiving mixed hot water from the secondary network supplementary heat convergence module → generating return water after heat dissipation → flowing back to the original secondary network return water pipe, returning to the power plant heat exchange station, feeding back T_room data → secondary network load monitoring module.

[0050] like Figure 4 As shown, Figure 4 This is the fourth schematic diagram of an auxiliary heating system based on a PVT system provided in this disclosure. In this embodiment, the heating system further includes a secondary heating network load monitoring module connected to the secondary centralized heating network and the collaborative control module, used to monitor the operating parameters of the secondary centralized heating network and calculate the real-time heat load of the secondary centralized heating network.

[0051] In this embodiment, a secondary network load monitoring module is set up in the heating system to establish a connection with the centralized heating secondary network and the collaborative control module. By deploying sensors at key nodes of the secondary network, operating parameters such as flow rate, temperature, and pressure are collected in real time, and the real-time heat load data of the secondary network is calculated based on thermodynamic formulas. This provides the collaborative control module with accurate heat load demand information, enabling it to dynamically adjust the operating strategies of equipment such as the PVT system and heat pump units according to actual needs, thereby achieving on-demand heating.

[0052] In this embodiment, the secondary network load monitoring module: collects the operating parameters of the original centralized heating secondary network in real time, calculates the real-time heat load of the secondary network, and provides a basis for auxiliary system operation strategies. Specific functions include: 1) Sensors deployed on the original secondary network's supply and return water pipelines: collect the original secondary network's supply water temperature T_org_sup, return water temperature T_org_ret, and flow rate Q_org; 2) Calculation of the secondary network's real-time heat load: Q_org_load = Q_org × c_water × (T_org_sup - T_org_ret); 3) Additional monitoring parameters: room temperature T_room of end users in the secondary network (collected via wireless sensors), and outdoor ambient temperature T_out; 4) Connection relationship: collects the original secondary network's operating data → transmits it to the collaborative control module, collects end-user T_room → transmits it to the collaborative control module.

[0053] like Figure 5 As shown, Figure 5This is the fifth schematic diagram of an auxiliary heating system structure based on a PVT system provided by the present disclosure. In this embodiment, the heating system further includes a heat pump heating output module connected to the heat pump unit module and the secondary network heat compensation confluence module, for transmitting the heat energy generated by the heat pump unit module to the secondary network heat compensation confluence module.

[0054] In this embodiment, a heat pump heating output module is set in the heating system, which is respectively connected to the heat pump unit module and the secondary network heat compensation confluence module. As an intermediate transmission link, this module constructs a heat energy transmission channel from the heat pump unit module to the secondary network heat compensation confluence module to achieve heat energy transfer. It ensures that the heat energy generated by the heat pump unit module can be stably and efficiently transmitted to the secondary network heat compensation confluence module, thereby providing a reliable heat source for the secondary network of centralized heating and enhancing the flexibility of heat energy allocation and heating guarantee ability of the entire heating system.

[0055] In this embodiment, the heat pump heating output module: adjusts the flow rate and temperature of the hot water produced by the heat pump to adapt to the heat compensation requirements of the secondary network. The specific functions include: 1) Built-in circulation pump and temperature sensor: The circulation pump adjusts the flow rate Q_hp of the heat pump hot water (0 - 50 m³ / h), and the temperature sensor monitors the outlet water temperature T_hp_out (45 - 55 °C); 2) Flow rate adjustment logic: When T_hp_out > T_target, increase Q_hp to reduce the mixed water temperature; when T_hp_out < T_target, decrease Q_hp or increase the output of the heat pump; Connection relationship: Receive the high-temperature hot water from the heat pump unit module → adjust the flow rate and temperature → output to the secondary network heat compensation confluence module, feedback the data of Q_hp and T_hp_out → cooperate with the control module.

[0056] In a specific embodiment, based on the above device, the following can be achieved: Energy output: The PVT system outputs direct current → power management module, outputs heat energy → heat exchange module; Load perception: The secondary network load monitoring module calculates Q_org_load and T_room, and transmits them to the cooperation control module; Strategy formulation: The cooperation control module formulates an operation strategy according to Q_org_load, P_pvt, and COP, and issues instructions to each module; Heat supply supplement: The PVT heat exchange module outputs supplementary hot water → confluence module, heat pump unit → heat pump output module → confluence module; Confluence mixing: The confluence module mixes the auxiliary heat and the original secondary network heat, and outputs it to the end users; Status feedback: The status monitoring module monitors the device status and feedbacks it to the cooperation control module to achieve closed-loop adjustment.

[0057] Specifically, taking Strategy 1 as an example, the reduction in power plant heat supply ΔQ_plant = Q_pvt_heat + Q_hp_heat, where: Q_pvt_heat = m_pvt × c_pvt × (T_pvt_out - T_pvt_in) (PVT direct heat supplement); Q_hp_heat = P_pvt_used × COP (heat generated by PVT electricity driving the heat pump, P_pvt_used is the PVT electricity consumed by the heat pump); the comprehensive utilization rate of new energy η_total = (Q_pvt_heat + Q_hp_heat) / (P_pvt_total × t + Q_pvt_radiation) (P_pvt_total is the total PVT power generation, t is the operating time, and Q_pvt_radiation is the solar radiation heat absorbed by the PVT), η_total can be increased to over 85%.

[0058] Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An auxiliary heating system based on a PVT system, characterized in that, The heating system includes: PVT system, heat pump unit module and secondary centralized heating network; The PVT power management module, which is connected to the PVT system and the heat pump unit module, is used to process the electrical energy generated by the PVT system and then supply power to the heat pump unit module. The secondary heating network supplementary heat exchange module, which is connected to the PVT system, the heat pump unit module and the secondary centralized heating network respectively, is used to transfer the heat energy generated by the PVT system and the heat pump unit module to the secondary centralized heating network. The collaborative control module, which is connected to the PVT system, the heat pump unit module, the secondary central heating network, and the secondary network heat replenishment module respectively, is used to determine the operating strategy of the PVT system, the heat pump unit module, and the secondary network heat replenishment module based on the real-time heat load of the secondary central heating network, and to control them according to the operating strategy.

2. The heating system according to claim 1, characterized in that, The heating system also includes: An auxiliary system status monitoring module, which is connected to the PVT system, heat pump unit module, PVT power management module, and collaborative control module respectively, is used to monitor the equipment operating status of the PVT system, heat pump unit module, and PVT power management module, and send the equipment operating status to the collaborative control module.

3. The heating system according to claim 2, characterized in that, The collaborative control module is also used to determine whether the equipment is abnormal based on the equipment's operating status, and to issue a fault warning and generate equipment maintenance prompts when the equipment is abnormal.

4. The heating system according to claim 1, characterized in that, The heating system also includes: The PVT system is connected to the secondary network heat exchange module through the PVT heat exchange module; The PVT heat exchange module is used to transfer the heat energy produced by the PVT system to the secondary network heat replenishment module.

5. The heating system according to claim 4, characterized in that, The secondary network heat replenishment and distribution module receives the heat energy transmitted by the PVT heat exchange module and the heat energy generated by the heat pump unit module; and transmits it to the original secondary network water supply pipe in the centralized heating secondary network, and outputs it to the secondary network end user module.

6. The heating system according to claim 1, characterized in that, The heating system further includes a secondary heating network load monitoring module connected to the secondary centralized heating network and the collaborative control module, used to monitor the operating parameters of the secondary centralized heating network and calculate the real-time heat load of the secondary centralized heating network.

7. The heating system according to claim 1, characterized in that, The heating system also includes: The heat pump heating output module, which is connected to the heat pump unit module and the secondary network heat replenishment junction module, is used to transfer the heat energy generated by the heat pump unit module to the secondary network heat replenishment junction module.

8. The heating system according to any one of claims 1 to 7, characterized in that, The collaborative control module is specifically used to control the PVT power management module to drive the heat pump unit module through the power generated by the PVT system when the illumination meets the preset requirements and the real-time heat load is lower than the preset load. It also controls the secondary network heat exchanger module to transfer the heat energy generated by the PVT system and the heat pump unit module to the secondary centralized heating network.

9. The heating system according to any one of claims 1 to 7, characterized in that, The PVT power management module includes: an energy storage submodule, used to store the electrical energy generated by the PVT system; The collaborative control module is specifically used to control the PVT power management module to discharge to the heat pump unit module through the energy storage submodule when the light intensity does not meet the preset requirements and the real-time heat load is higher than the preset load, thereby driving the heat pump unit module.

10. The heating system according to any one of claims 1 to 7, characterized in that, The coordinated control module is specifically used to control the PVT power management module to discharge to the heat pump unit module through the energy storage submodule when the PVT system fails, thereby driving the heat pump unit module; and to control the secondary network heat replenishment and combination module to transfer the heat energy generated by the PVT system to the secondary centralized heating network when the heat pump unit module fails.

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