Combined type ground source heat pump energy storage distributed energy system integrating photovoltaic heat auxiliary heating and power supply functions

Abstract

The invention discloses a combined type ground source heat pump energy storage distributed energy system integrating photovoltaic heat auxiliary heating and power supply functions, which comprises a ground source heat pump, a PVT device, a phase change energy storage device and a floor radiation heating device which are connected in parallel, and the ground source heat pump, the PVT device, the phase change energy storage device and the floor radiation heating device are connected in parallel. The ground source heat pump, the PVT device, the phase change energy storage device and the floor radiation heating device jointly form an energy supply network; and the ground source heat pump is connected with a ground heat exchanger. According to the method, innovation and breakthrough are achieved on the technical level, great potential is shown on economic and environmental benefits, and a feasible solution is provided for promoting optimization of an energy structure and sustainable development of a building environment.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pump system energy supply and renewable energy utilization, and specifically to a composite ground source heat pump energy storage distributed energy system integrating photovoltaic heat auxiliary heating and power supply functions. Background Art

[0002] With the continuous growth of global energy demand and the increasingly severe environmental problems, the long-term dependence on traditional fossil energy has exposed a series of problems, including energy security, air pollution and climate change. These problems not only threaten the sustainable development of human society, but also become the main contradiction restricting economic and social progress. Therefore, promoting the green transformation of the energy system and developing clean, low-carbon, safe and efficient energy technologies have become a global consensus and urgent need.

[0003] During this transformation process, Beijing has actively responded to the national strategic goals of carbon peak and carbon neutrality, and has clearly proposed to vigorously develop renewable energy, especially photovoltaic and heat pump technologies. Geothermal energy, as a clean and sustainable energy source, has occupied an important position in the field of clean heating in northern China with its abundant reserves, mature development technology and zero emissions. However, a single ground source heat pump system may cause soil thermal imbalance in long-term operation, affecting system performance and stability.

[0004] To solve this problem, this patent proposes an innovative multi-energy complementary distributed energy system. Summary of the invention

[0005] The purpose of the present invention is to provide a composite ground-source heat pump energy storage distributed energy system integrating photovoltaic thermal auxiliary heating and power supply functions to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a composite ground source heat pump energy storage distributed energy system integrating photovoltaic thermal auxiliary heating and power supply functions, comprising a ground source heat pump, a PVT device, a phase change energy storage device and floor radiant heating, wherein the ground source heat pump, the PVT device, the phase change energy storage device and the floor radiant heating are connected in parallel, and the ground source heat pump, the PVT device, the phase change energy storage device and the floor radiant heating together constitute an energy supply network; the ground source heat pump is connected to a buried pipe heat exchanger.

[0007] Preferably, a plurality of temperature sensors are provided at the inlet and outlet of the phase-change energy storage device and inside the phase-change heat storage device.

[0008] Preferably, the input end of the ground source heat pump is provided with valve V1 and valve V2, the two ends of the PVT device are respectively provided with valve V3 and valve V4, the output end of the ground source heat pump is provided with valve V5 and valve V6, the two ends of the phase change energy storage device are respectively provided with valve V7 and valve V8, and the two ends of the floor radiant heating are respectively provided with valve V9 and valve V10.

[0009] Preferably, the input end and the output end of the ground source heat pump are respectively provided with a water pump P1 and a water pump P2, one end of the PVT device is provided with a water pump P3, and one end of the floor radiation heating is provided with a water pump P4.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. This patent provides a PV / T assisted heating and power supply composite ground source heat pump energy storage distributed energy system, which makes full use of geothermal energy and solar energy renewable resources and reduces the consumption of non-renewable energy such as coal.

[0012] 2. The composite ground source heat pump distributed energy system provided by this patent couples solar energy and geothermal energy together, overcoming the shortcomings of a single renewable energy system, thereby ensuring the energy supply of the system and achieving long-term stable energy supply of distributed energy.

[0013] 3. The composite ground source heat pump distributed energy system provided by this patent uses solar energy for heat supplementation, thereby improving the performance of the ground source heat pump device / system.

[0014] 4. The composite ground-source heat pump distributed energy system provided by this patent stores energy during the low-peak electricity period at night and releases energy during the peak electricity price period during the day, thereby reducing operating costs through peak-valley arbitrage.

[0015] 5. The composite ground source heat pump distributed energy system provided by this patent can be used for energy supply of general buildings and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention.

[0017] In the figure: 1. Ground source heat pump; 2. PVT device; 3. Buried pipe heat exchanger; 4. Phase change energy storage device; 5. Floor radiant heating. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1 The present invention provides a technical solution: a composite ground source heat pump energy storage distributed energy system integrating photovoltaic thermal auxiliary heating and power supply functions, including a ground source heat pump 1, a PVT device 2, a phase change energy storage device 4 and a floor radiant heating 5, the ground source heat pump 1, the PVT device 2, the phase change energy storage device 4 and the floor radiant heating 5 are connected in parallel, and the ground source heat pump 1, the PVT device 2, the phase change energy storage device 4 and the floor radiant heating 5 together form an energy supply network; the ground source heat pump 1 is connected to a buried pipe heat exchanger 3.

[0020] In the present invention, a plurality of temperature sensors are provided at the inlet and outlet of the phase-change energy storage device 4 and inside the phase-change heat storage device 4 .

[0021] In the present invention, valves V1 and V2 are provided at the input end of the ground source heat pump 1, valves V3 and V4 are provided at both ends of the PVT device 2, valves V5 and V6 are provided at the output end of the ground source heat pump 1, valves V7 and V8 are provided at both ends of the phase change energy storage device 4, and valves V9 and V10 are provided at both ends of the floor radiant heating 5.

[0022] In the present invention, the input and output ends of the ground source heat pump 1 are respectively provided with water pumps P1 and P2, one end of the PVT device 2 is provided with a water pump P3, and one end of the floor radiation heating 5 is provided with a water pump P4.

[0023] Compared with a single ground-source heat pump system, the present invention has significant advantages in energy efficiency, economy and carbon reduction. The system automatically adjusts the operation strategy according to the changes in indoor heat load to optimize energy use. The phase change thermal storage device stores energy during the night when electricity prices are low, and releases energy during the day when electricity prices are peak to cope with peak loads, thereby keeping the ground-source heat pump running at a stable load rate and improving overall energy efficiency.

[0024] Nighttime energy storage mode: start the ground source heat pump 1 and the related water pump P2, open valves V1, V2, V5, and V6, and close the other valves. At this time, the heat on the evaporation side of the ground source heat pump 1 comes from the buried pipe exchanger 3. The heat generated by the ground source heat pump 1 passes through the water pump P2 and valve V6 to enter the phase change heat storage device 4 to exchange heat with its internal phase change material, and then passes through valves V3, V4, and V5 to return to the ground source heat pump 1 to complete a cycle. In the heat storage stage, due to the absence of solar radiation, the electricity driving the power equipment mainly comes from the power grid.

[0025] Energy supply mode during the day: ① When the indoor load is low or stable, the ground source heat pump device 1 supplies energy to the indoor environment, and the value of the temperature sensor is determined, and the PVT device provides heat to the building terminal; or the buried pipe exchanger 3 provides heat. ② When the indoor load gradually increases to the peak load, valves V6, V8, and V10 are opened, and the ground source heat pump device 1 and the phase change energy storage device 4 supply energy to the building terminal. The hot water from the ground source heat pump device 1 merges with the hot water from the phase change energy storage device 4, passes through the water pump P4, and exchanges heat with the floor radiation heating. The return water is diverted at valve V9, and passes through V7 and V5 respectively to enter the phase change heat storage device 4 and the ground source heat pump device 1, completing a cycle. At this time, the power to drive the power equipment mainly comes from the PVT device 2, and the excess power can be sold to the power grid.

[0026] The system of the present invention uses a ground source heat pump as the main heat source, and integrates auxiliary energy and equipment such as a solar energy system and a phase change heat storage device. This integrated system can not only achieve energy complementarity and cascade utilization, improve the comprehensive utilization efficiency of energy, but also break through the limitations of traditional heating systems. Through this innovative model of multi-energy complementarity and system integration, this patent aims to provide technical support for the realization of green and low-carbon development of the building environment and contribute to the sustainable development of the social economy.

[0027] The design goal of the system of the present invention is to achieve effective storage and comprehensive utilization of geothermal energy and solar energy to meet the needs of the current energy structure transformation and promote the green development of the building environment. In this form, the addition of phase change energy storage is of great significance to the original distributed system. The composite ground source heat pump distributed energy system has the following advantages: in terms of energy efficiency, by coupling heat sources, the shortcomings of a single renewable energy system are overcome, energy supply is guaranteed, and long-term energy supply of distributed energy is achieved; in terms of economy, this system reduces the operating cost of the system and improves the overall economy of the system through the arbitrage strategy of peak and valley electricity price differences; in terms of carbon reduction, for general buildings, this system provides clean energy for its own heating and power supply needs through photovoltaic power generation, reducing dependence on traditional fossil energy. The excess electricity generated by the system can be sold online, further reducing the carbon emissions of terminal energy consumption in buildings, and helping to achieve the goal of carbon neutrality in the construction field.

[0028] In summary, the composite ground source heat pump energy storage distributed energy system of the present invention has not only achieved innovative breakthroughs in technology, but also demonstrated great potential in economic and environmental benefits, providing a practical solution for promoting the optimization of energy structure and the sustainable development of the building environment.

[0029] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the embodiments of the present invention have been shown and described, it is understood by ordinary technicians in the field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A composite ground source heat pump energy storage distributed energy system integrating photovoltaic heat-assisted heating and power supply functions, characterized in that: The invention comprises a ground source heat pump (1), a PVT device (2), a phase change energy storage device (4) and a floor radiant heating system (5); the ground source heat pump (1), the PVT device (2), the phase change energy storage device (4) and the floor radiant heating system (5) are connected in parallel, and the ground source heat pump (1), the PVT device (2), the phase change energy storage device (4) and the floor radiant heating system (5) together form an energy supply network; and the ground source heat pump (1) is connected to a buried pipe heat exchanger (3).

2. According to claim 1, a composite ground source heat pump energy storage distributed energy system integrating photovoltaic heat-assisted heating and power supply functions is characterized by: A plurality of temperature sensors are arranged at the inlet and outlet of the phase change energy storage device and inside the phase change heat storage device.

3. According to claim 1, a composite ground source heat pump energy storage distributed energy system integrating photovoltaic heat-assisted heating and power supply functions is characterized by: The input end of the ground source heat pump (1) is provided with a valve V1 and a valve V2, the two ends of the PVT device (2) are provided with a valve V3 and a valve V4 respectively, the output end of the ground source heat pump (1) is provided with a valve V5 and a valve V6, the two ends of the phase change energy storage device (4) are provided with a valve V7 and a valve V8 respectively, and the two ends of the floor radiation heating (5) are provided with a valve V9 and a valve V10 respectively.

4. According to claim 1, a composite ground source heat pump energy storage distributed energy system integrating photovoltaic heat-assisted heating and power supply functions is characterized by: The input end and output end of the ground source heat pump (1) are respectively provided with a water pump P1 and a water pump P2, one end of the PVT device (2) is provided with a water pump P3, and one end of the floor radiation heating (5) is provided with a water pump P4.

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