Pasturing area heat supply system based on PVT system coupling heat pump and long-term and short-term heat storage

Abstract

The utility model relates to the field of pasturing area heat supply transformation, and discloses a pasturing area heat supply system based on PVT system coupling heat pump and long-term and short-term heat storage, which comprises a PVT system used for directly providing heat energy and electric energy to a user side; the heat pump system is used for converting electric energy into heat energy; the power storage system is used for storing excess electric energy of photovoltaic power generation; the heat storage system is divided into a short-term heat storage module and a cross-season heat storage module and is used for storing heat energy; and the control system is used for dynamically adjusting the running states of the PVT system, the heat pump system, the electricity storage system and the heat storage system according to the heat load and electric load requirements of the user side, and thermoelectric optimization control is achieved. The pasturing area heat supply system solves the problem that heat and power supply and demand in the pasturing area heat supply system are unbalanced, efficient utilization and stable supply of energy are achieved, and energy balance and optimal distribution among different seasons can be guaranteed especially in the cross-seasonal heat supply process.

Description

Technical Field

[0001] This utility model relates to the field of pastoral heating system renovation, specifically a pastoral heating system based on a PVT system coupled with a heat pump and long- and short-term heat storage. Background Technology

[0002] Heating systems in pastoral areas face challenges such as unstable energy supply and an imbalance between heat and power supply and demand. Traditional heating systems rely on fossil fuels, which are not only costly but also pollute the environment. Furthermore, heat demand in pastoral areas is lower in summer and higher in winter, leading to a mismatch between heating load and demand. The core objective of cross-seasonal thermal storage modules is to address the problem of seasonal heat energy fluctuations. Heating demand is high in winter, while in summer, due to higher temperatures, excess heat is generated, with solar thermal and heat pump systems producing a large amount of heat that cannot be fully utilized in the short term. Therefore, by designing underground pipes, the "excess" heat in summer can be effectively stored and released during peak heating periods (such as winter) to compensate for insufficient heat demand.

[0003] Therefore, PVT (photovoltaic-thermal integration) technology is a new type of solar energy utilization that integrates power generation and heat collection. It has shown great potential in improving the comprehensive utilization rate of solar energy and meeting the dual needs of users for electricity and heat. How to achieve optimal control of thermoelectricity in pastoral heating systems through system integration and optimization control is a problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this application is to provide a pastoral heating system based on a PVT system coupled with a heat pump and long- and short-term thermal storage, which can solve the problem of seasonal imbalance between heat and electricity load in pastoral heating systems and achieve efficient energy utilization and stable supply.

[0005] To address the aforementioned technical problems, this application provides a pastoral heating system based on a PVT system coupled with a heat pump and long- and short-term thermal storage, comprising:

[0006] The PVT system uses photovoltaic (PV) modules to convert solar energy into electricity. The solar thermal conversion module uses vacuum tube collectors to convert solar energy into heat.

[0007] The heat pump system uses a ground source heat pump, which converts electrical energy into heat energy through a reverse Carnot cycle to meet the user's heating needs.

[0008] The energy storage system uses lithium battery packs, supports rapid charging and discharging, and is used to store excess electrical energy from the PVT system to balance fluctuations in power supply and demand.

[0009] Thermal storage system, short-term thermal storage module: Utilizes phase change energy storage materials combined with an insulated water tank to store excess heat energy from solar thermal conversion, as well as heat energy from the heat pump, for short-term heat energy storage and release. Cross-seasonal thermal storage module: Employs buried pipes to store excess heat energy from summer for winter use.

[0010] The control system is used to dynamically adjust the operating status of the PVT system, heat pump system, energy storage system and thermal storage system according to the user's heat load and electrical load requirements, so as to achieve optimal thermoelectric control.

[0011] The PVT system integrates photovoltaic power generation and solar thermal conversion. The photovoltaic power generation section utilizes the photoelectric effect of solar energy to convert sunlight into direct current (DC) electricity, which is then converted into alternating current (AC) electricity by an inverter, providing users with a stable power supply. Simultaneously, the solar thermal conversion section converts solar radiation into heat energy through collectors, making it widely applicable in district heating and hot water supply systems. The advantages of this type of system lie in its high energy efficiency ratio and versatility, enabling it to optimize the combined output of electricity and heat under different seasonal or weather conditions, maximizing energy utilization.

[0012] The heat pump system is based on ground source heat pump technology, which can efficiently convert electrical energy into heat energy to meet users' heating needs.

[0013] The energy storage system is equipped with lithium batteries, which are mainly used for the storage and scheduling of electrical energy to balance supply and demand fluctuations.

[0014] The thermal storage system is divided into short-term thermal storage modules and cross-seasonal thermal storage modules. It combines phase change energy storage materials, insulated water tanks, and buried pipe thermal storage to store thermal energy and release it stably when needed. The short-term thermal storage modules primarily address fluctuating daily heat demands within the season, storing heat energy from the solar thermal conversion module and heat pump system during the day and providing a heat source at night or when temperatures drop sharply. In winter, the demand for heat energy in pastoral areas increases dramatically, while external temperatures are low and solar radiation decreases, significantly reducing the heat output of the solar thermal system. At this time, the buried pipe thermal storage modules of the cross-seasonal thermal storage module release the heat stored in the soil and rock, providing a stable heat source to meet winter heating needs.

[0015] The control system consists of a sensor module, a data processing module, and a control execution module. The sensor module is responsible for collecting real-time heat load and electrical load data from the user side; the data processing module analyzes the collected data and generates corresponding optimization instructions; the control execution module dynamically adjusts the operating parameters of the PVT system, heat pump system, energy storage system, and thermal storage system according to the instructions to achieve efficient system coordination.

[0016] This application presents a pastoral heating system based on a PVT system coupled with a heat pump and long- and short-term thermal storage. By integrating the PVT system, heat pump system, energy storage system, long- and short-term thermal storage system, and village-level integrated energy management system, it achieves multi-energy coordinated operation and effectively solves the problems of high energy consumption and mismatch between heat and electricity supply and demand in pastoral heating systems. This system not only significantly improves the utilization rate of renewable energy but also ensures the stability and reliability of energy supply, further optimizes the efficiency of energy temporal and spatial matching, utilizes solar energy in summer to achieve cross-seasonal heat storage, and coordinates the interaction of multiple user heat exchangers through a village-level system, reducing the investment cost of thermal storage facilities and enhancing economic benefits. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a pastoral heating system based on a PVT system coupled with a heat pump and long- and short-term heat storage, provided as an embodiment of this application. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. In addition, the terms "first", "second", "third", "upper", "lower", "left", "right", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance. At the same time, in the description of the present utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0019] Figure 1 A structural diagram of a pastoral heating system based on a PVT system coupled with a heat pump and long- and short-term thermal storage, provided for an embodiment of this application, is shown below. Figure 1 As shown, the pastoral heating system renovation system includes a PVT system, which comprises photovoltaic power generation modules and solar thermal conversion modules. The photovoltaic power generation modules convert solar energy into electrical energy, and the solar thermal conversion modules convert solar energy into thermal energy. A heat pump system converts electrical energy into thermal energy. An energy storage system stores excess electrical energy. A thermal storage system includes short-term thermal storage modules and inter-seasonal thermal storage modules to store excess thermal energy. A control system dynamically coordinates the operation modes of the PVT system, heat pump system, energy storage system, and thermal storage system based on the user's heat and power demand, achieving optimized management of combined heat and power (CHP).

[0020] The control system 5 may specifically include a sensor module, a data processing module, and a control execution module. The sensor module is used to collect real-time thermal and electrical energy demand data from the user side. The data processing module is responsible for analyzing the sensor data and generating control commands. The control execution module adjusts the operating status of the PVT system, heat pump system, energy storage system, and thermal storage system in real time according to the commands.

[0021] This application proposes an optimized scheme based on PVT coupled heat pump and multiple heat storage forms. By working together with the PVT system, heat pump system, energy storage system and heat storage system, the problem of heat and electricity supply and demand mismatch in pastoral heating scenarios is solved, the comprehensive energy utilization efficiency is improved, and the stability and reliability of the heating system are ensured.

[0022] Based on the above embodiments, the relevant control of the above-mentioned pastoral heating renovation system is described below.

[0023] To fully utilize solar energy resources, during daytime operation, the photovoltaic (PV) power generation units and solar thermal conversion units of the PVT system are prioritized for power generation and heating. When the PVT system can meet the electricity demand but not the heat demand, the excess heat in the thermal storage system is first utilized, and the heat pump system is activated to convert excess electricity into heat to supplement heating. If there is still surplus electricity, it is stored in the energy storage system. Conversely, if there is insufficient electricity, the electricity in the energy storage system is used for heating. When the PVT system can meet the heat demand but not the electricity demand, the excess heat is stored in the thermal storage system, and the electricity in the energy storage system is utilized. If there is still a power shortage, electricity is purchased from the grid to supplement it. When the PVT system can meet both electricity and heat demand, the excess heat and electricity are prioritized for storage in the thermal storage system and the energy storage system, respectively. If the energy storage system is full but the thermal storage system still has capacity, the heat pump system converts excess electricity into heat and stores it in the thermal storage system. If both the energy storage system and the thermal storage system are full, the excess electricity is sold to the grid. When the PVT system cannot simultaneously meet the demands for heat and electricity, it first draws energy from the thermal storage and power storage systems. If there is still a power shortage, electricity is purchased from the grid. If there is still a heat shortage, electricity is purchased from the grid and supplemented through a heat pump system. Through this operational strategy, the system can achieve efficient energy utilization and a balance between supply and demand. The cross-seasonal modules in the thermal storage system store excess heat energy from the solar thermal modules and heat pumps during the summer when sunlight is abundant, and release this heat energy during the winter when heating demand is high and sunlight is scarce.

[0024] This application solves the problem of imbalance between heat and electricity supply and demand in pastoral heating systems by working in synergy with a PVT system, a heat pump system, an energy storage system, and a thermal storage system, thereby achieving efficient energy utilization and stable energy supply.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pastoral heating system based on a PVT system coupled with a heat pump and long- and short-term thermal storage, characterized in that, include: A PVT system is used to directly provide heat and electricity to the user side. The PVT system includes a photovoltaic power generation module and a solar thermal conversion module. The photovoltaic power generation module is used to convert solar energy into electrical energy, and the solar thermal conversion module is used to convert solar energy into heat energy. Heat pump systems are used to convert electrical energy into heat energy; Energy storage systems are used to store excess electrical energy generated by photovoltaic power generation; A thermal energy storage system, comprising a short-term thermal energy storage module and a cross-seasonal thermal energy storage module, is used to store thermal energy. The short-term thermal energy storage module utilizes phase change energy storage materials and insulated water tanks for the storage and release of short-term thermal energy. This module is used to address fluctuating daily heat demand within the system during the season. When daytime temperatures are high, the heat generated by the PVT system is stored in the short-term thermal energy storage module for use at night or in cold weather. The cross-seasonal thermal energy storage module uses buried pipes for thermal energy storage, storing and retaining summer heat for winter use to compensate for insufficient heat energy demand during peak winter periods. The control system is used to dynamically adjust the operating status of the PVT system, heat pump system, energy storage system, and thermal storage system according to the user's heat load and electrical load requirements.

2. The pastoral heating system based on a PVT system coupled with a heat pump and long- and short-term thermal storage as described in claim 1, characterized in that, The heat pump system uses a high-performance ground source heat pump to convert electrical energy into heat energy.

3. The pastoral heating system based on a PVT system coupled with a heat pump and long- and short-term thermal storage as described in claim 1, characterized in that, The energy storage system uses lithium battery packs to store electrical energy.

4. The pastoral heating system based on a PVT system coupled with a heat pump and long- and short-term thermal storage as described in claim 1, characterized in that, The control system includes a sensor module, a data processing module, and a control execution module. The sensor module is used to monitor the heat load and electrical load demand on the user side in real time. The data processing module is used to analyze the sensor data and generate control commands. The control execution module is used to execute the control commands and adjust the operating status of the PVT system, heat pump system, energy storage system, and thermal storage system.

5. The pastoral heating system based on a PVT system coupled with a heat pump and long- and short-term thermal storage as described in claim 1, characterized in that, Buried pipe thermal storage uses rock and soil as the thermal storage medium, which has high thermal storage capacity and storage capacity.

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