Photovoltaic power generation, solar energy, gas-fired boiler and heat pump unit multi-element collaborative complementary heat supply system

Abstract

The invention belongs to the technical field of heat supply, and particularly relates to a photovoltaic power generation, solar energy, gas-fired boiler and heat pump unit multi-element collaborative complementary heat supply system, which comprises a water heating system, a heat supply system, a heat supply system, a heat supply system, a heat supply system and a control system, the water storage tank is used for storing water and is connected with the water heating system; the photovoltaic heat supply module converts solar energy into electric energy through a photovoltaic panel, and then the electric energy is used for driving a heat pump or an electric boiler or a resistance wire to heat water in a water storage tank. The solar heat supply module directly utilizes the heat effect of solar energy, sunlight is absorbed through a heat collector to heat a heat transfer medium, and then heat is transferred to a water storage tank or a heating system through a heat exchanger. According to the gas-fired boiler heat supply module, fuel burns to release heat energy, and heat is transferred to the water storage tank or the heating system through heat exchange.

Description

Technical Field

[0001] The present invention belongs to the technical field of heating, and particularly relates to a multi-source collaborative complementary heating system integrating photovoltaic power generation, solar energy, gas boilers and heat pump units. Background Art

[0002] At present, distributed energy heating systems adopt a single heat source, such as gas-fired hot water boilers, electric boilers (including thermal storage electric boilers), water / ground source heat pumps, air source heat pumps, etc. The distributed heating system establishes a boiler room or a heat energy station with the above single heat source, and forms a circulating hot water heating system with the user heat dissipation terminal through the supply / return water pipe network.

[0003] Gas-fired hot water boilers use gas (such as natural gas, liquefied petroleum gas, city gas, biogas, etc.) as fuel, and heat water through a burner to achieve heating. The boilers have high intelligence, fast heating speed, low noise and no dust. However, the disadvantages of using a single gas-fired hot water boiler as a heating heat source are as follows: 1) The "gas shortage" results in poor guarantee of winter heating; with the conversion from coal to gas in urban heating, there is an over-reliance on natural gas, and the "gas shortage" in winter causes the distributed heating heat source to be paralyzed due to gas supply interruption; 2) The unit energy price is high; natural gas is a fossil fuel and a non-renewable resource. Affected by the international energy market, the gas price is bound to show an upward trend, and the increase in gas price in winter in the northern region has become normal; 3) Nitrogen emissions; the greenhouse effect formed by the flue gas emissions of gas boilers, and the emissions contain nitrogen oxides, which cause pollution to the atmosphere; 4) High carbon emission index; small and medium-sized gas boilers have low thermal efficiency and large gas consumption, resulting in relatively high carbon emission indexes.

[0004] Electric hot water boilers generate hot water by making electric heating components heat up through electricity. Among them, thermal storage electric boilers are classified into water tank thermal storage and high-temperature phase change thermal storage material thermal storage according to the thermal storage medium. Electric boilers have high automation, fast heating speed, low noise and no dust. The disadvantages of using a single electric boiler (including thermal storage electric boilers) as a heating heat source are as follows: 1) High electricity price; in areas without preferential heating electricity prices, the electricity consumption cost per unit area is about twice that of gas boilers, which is difficult for users to bear; 2) Large distribution capacity; the distribution capacity is at least 1.65 times more than the rated power of the boiler; 3) Thermal storage electric boilers are not energy-saving; the widely promoted thermal storage electric boilers work using time-of-use electricity prices, which do not reduce energy consumption, but only reduce the energy consumption cost. Because there is intermediate heat exchange (water / water or air / water heat exchange), the thermal efficiency is lower than that of ordinary electric boilers, and they belong to non-energy-saving equipment.

[0005] Common types of heat pumps in a distributed heating system include: water / ground source heat pumps and air source heat pumps. A heat pump can transfer low-grade heat energy in nature to high-grade heat energy for heating. The heat pump itself consumes a part of energy (electric energy), and transfers the energy stored in the environmental medium (low-grade heat energy stored in water, soil, and air) to high-grade heat through a heat transfer working medium circulation system to heat water. The high-grade energy (electric energy) consumed by the heat pump device is only a small part of the output energy. Therefore, the use of heat pump technology can save a large amount of high-grade energy. However, the disadvantages of using a single heat pump as a heating heat source are as follows: 1) The water / ground source heat pump uses the rock and soil body, stratum soil, groundwater or surface water as the low-temperature heat source. Among them, the water source heat pump needs to drill extraction wells and recharge wells. Since recharge is difficult to continue, it is easy to cause geological hazards; well drilling is subject to local groundwater control and it is currently difficult to obtain approval. The geothermal energy exchange system of the ground source heat pump covers a large area and has a high investment. 2) The heating capacity of the air source heat pump decreases with the decrease of the ambient temperature. When the ambient temperature is relatively low, frosting occurs on the evaporator side. Due to the imperfect defrosting technology, the working load of the scroll compressor of the air source heat pump is too large and it is easy to burn out. In view of this, we propose a multi-source collaborative complementary heating system of photovoltaic power generation, solar energy, gas boiler and heat pump unit. Summary of the Invention

[0006] The object of the present invention is to provide a multi-source collaborative complementary heating system of photovoltaic power generation, solar energy, gas boiler and heat pump unit in view of the above existing technical problems, so as to solve the problems proposed in the above background technology.

[0007] In view of this, the present invention provides a multi-source collaborative complementary heating system of photovoltaic power generation, solar energy, gas boiler and heat pump unit, including:

[0008] A water heating system, a heating method using hot water as a heat transfer medium, and then releasing heat through a pipeline to a heat dissipation device;

[0009] A water storage tank for storing water, and the water storage tank is connected to the water heating system;

[0010] A photovoltaic heating module, which converts solar energy into electric energy through photovoltaic panels, and then uses the electric energy to drive a heat pump, an electric boiler or a resistance wire to heat the water in the water storage tank;

[0011] A solar heating module, directly using the thermal effect of solar energy, absorbing sunlight through a collector to heat the heat transfer medium, and then transferring the heat to the water storage tank or the heating system through a heat exchanger;

[0012] A gas boiler heating module, where fuel combustion releases heat energy, and the heat is transferred to the water storage tank or the heating system through heat exchange;

[0013] The heat pump unit heating module. The heat pump unit absorbs heat from a low-temperature heat source, drives the compressor through electricity to raise the temperature, and then releases higher-grade thermal energy into the room.

[0014] The intelligent control module. The intelligent control module is connected to the water heating system, the photovoltaic heating module, the solar heating module, the gas boiler heating module, the heat pump unit heating module, and the water storage tank.

[0015] In the above technical solution, further, light sensors are provided in both the photovoltaic heating module and the solar heating module.

[0016] In the above technical solution, further, a control system is provided in the water heating system, and the temperature control system is used to control the temperature of the electric heating device.

[0017] In the above technical solution, further, a temperature sensor is provided in the water storage tank for monitoring the temperature of the water inside the storage tank.

[0018] In the above technical solution, further, a water level sensor is provided in the water storage tank for monitoring the water level height inside the storage tank.

[0019] In the above technical solution, further, the heat pump unit heating module includes an evaporator, a compressor, a condenser, and an expansion valve. The gaseous refrigerant coming out of the evaporator is sucked into the compressor. Through compression, the pressure and temperature of the refrigerant increase significantly. The high-temperature and high-pressure gaseous refrigerant enters the condenser and dissipates heat through a fan or water circulation. The refrigerant condenses into a high-pressure liquid, and the released latent heat is used for heating. The high-pressure liquid refrigerant throttles through the expansion valve, and the sudden drop in pressure causes part of the refrigerant to flash into a gas, forming a low-temperature and low-pressure two-phase mixture.

[0020] In the above technical solution, further, the low-temperature heat source of the heat pump unit is air, soil, or water. In a heat pump or refrigeration system, the selection of the low-temperature heat source directly affects the efficiency, cost, and applicability of the system.

[0021] In the above technical solution, further, the intelligent control module is used to control the intelligent control module, the photovoltaic heating module, the solar heating module, the gas boiler heating module, and the heat pump unit heating module. According to the heating situation, a group of modules or multiple groups of modules are reasonably controlled to supply heat simultaneously.

[0022] In the above technical solution, further, the specific control method of the intelligent control module includes:

[0023] Set the maximum temperature value and the minimum temperature value in the water storage tank. When the water temperature in the water storage tank is relatively high, each module stops heating. When the water tank temperature is lower than the set threshold, start a certain group or multiple groups of modules to supply heat;

[0024] Detect whether there is sunlight on the current day through a light sensor, and whether the light is sufficient. When the light is sufficient, the photovoltaic heating module and the water heating system are the main heating modules;

[0025] When the light is insufficient, on the premise that the photovoltaic heating module and the water heating system supply heat, start one of the gas boiler heating module or the heat pump unit heating module to supply heat;

[0026] When there is no light, supply heat through one of the gas boiler heating module and the heat pump unit heating module, or supply heat simultaneously with both modules.

[0027] The beneficial effects of the present invention are:

[0028] This photovoltaic power generation, solar energy, gas boiler and heat pump unit multi - source collaborative complementary heating system converts different energy sources into heat energy uniformly, realizes the purpose of multi - energy complementarity, energy conservation and consumption reduction, and makes full use of solar energy and photovoltaic energy according to the actual situation to achieve the purpose of energy conservation.

[0029] 2. This photovoltaic power generation, solar energy, gas boiler and heat pump unit multi - source collaborative complementary heating system, through the intelligent control module, sets the maximum temperature value and the minimum temperature value in the water storage tank. When the water temperature in the water storage tank is relatively high, each module stops heating. When the water tank temperature is lower than the set threshold, start one or more groups of modules to supply heat; Detect whether there is sunlight on the current day through a light sensor, and whether the light is sufficient. When the light is sufficient, the photovoltaic heating module and the water heating system are the main heating modules; When the light is insufficient, on the premise that the photovoltaic heating module and the water heating system supply heat, start one of the gas boiler heating module or the heat pump unit heating module to supply heat; When there is no light, supply heat through one of the gas boiler heating module and the heat pump unit heating module, or supply heat simultaneously with both modules. Description of the Drawings

[0030] Figure 1 is the system module diagram of the present invention Detailed Embodiments

[0031] Next, the technical solutions in the embodiments of the present application will be clearly described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0032] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] Embodiment 1:

[0034] Please refer to Figure 1 As shown, this embodiment provides a multi - collaborative complementary heating system for photovoltaic power generation, solar energy, gas boilers, and heat pump units.

[0035] It includes:

[0036] A water - heating system, a heating method using hot water as the heat - transfer medium, and then the heat is released through pipes to the heat - dissipation equipment.

[0037] A water storage tank for storing water, and the water storage tank is connected to the water - heating system.

[0038] A photovoltaic heating module that converts solar energy into electrical energy through photovoltaic panels, and then uses the electrical energy to drive a heat pump, an electric boiler, or a heating wire to heat the water in the storage tank.

[0039] A solar heating module that directly utilizes the thermal effect of solar energy, absorbs sunlight through a collector to heat the heat - transfer medium, and then transfers the heat to the water storage tank or the heating system through a heat exchanger.

[0040] A gas - boiler heating module where fuel combustion releases heat energy, and the heat is transferred to the water storage tank or the heating system through heat exchange.

[0041] A heat - pump unit heating module where the heat - pump unit absorbs heat from a low - temperature heat source, raises the temperature by driving a compressor with electrical energy, and then releases higher - grade heat energy to the room.

[0042] An intelligent control module that is connected to the water - heating system, the photovoltaic heating module, the solar heating module, the gas - boiler heating module, the heat - pump unit heating module, and the water storage tank.

[0043] Embodiment 2:

[0044] This embodiment provides a multi - collaborative complementary heating system for photovoltaic power generation, solar energy, gas boilers and heat pump units. In addition to the technical solutions of the above - mentioned embodiments, it also has the following technical features.

[0045] Among them, light sensors are provided in both the photovoltaic heating module and the solar heating module.

[0046] Embodiment 3:

[0047] This embodiment provides a multi - collaborative complementary heating system for photovoltaic power generation, solar energy, gas boilers and heat pump units. In addition to the technical solutions of the above - mentioned embodiments, it also has the following technical features.

[0048] Among them, a control system is provided in the water heating system, and the temperature control system is used to control the temperature of the electric heating device.

[0049] Embodiment 4:

[0050] This embodiment provides a multi - collaborative complementary heating system for photovoltaic power generation, solar energy, gas boilers and heat pump units. In addition to the technical solutions of the above - mentioned embodiments, it also has the following technical features.

[0051] Among them, a temperature sensor is provided in the water storage tank for monitoring the temperature of the water inside the water storage tank.

[0052] Embodiment 5:

[0053] This embodiment provides a multi - collaborative complementary heating system for photovoltaic power generation, solar energy, gas boilers and heat pump units. In addition to the technical solutions of the above - mentioned embodiments, it also has the following technical features.

[0054] Among them, a water level sensor is provided in the water storage tank for monitoring the water level height inside the water storage tank.

[0055] Embodiment 6:

[0056] This embodiment provides a multi - collaborative complementary heating system for photovoltaic power generation, solar energy, gas boilers and heat pump units. In addition to the technical solutions of the above - mentioned embodiments, it also has the following technical features.

[0057] Among them, the heat pump unit heating module includes an evaporator, a compressor, a condenser, and an expansion valve. The gaseous refrigerant coming out of the evaporator is sucked into the compressor. Through compression, the pressure and temperature of the refrigerant increase significantly. The high - temperature and high - pressure gaseous refrigerant enters the condenser, and heat is dissipated through a fan or water circulation. The refrigerant condenses into high - pressure liquid, and the released latent heat is used for heating. The high - pressure liquid refrigerant throttles through the expansion valve, and the sudden drop in pressure causes part of the refrigerant to flash into gas, forming a low - temperature and low - pressure two - phase mixture.

[0058] Among them, the low-temperature heat source of the heat pump unit is air, soil, or water. In a heat pump or refrigeration system, the selection of the low-temperature heat source directly affects the efficiency, cost, and applicability of the system.

[0059] Example 7:

[0060] This embodiment provides a multi-source collaborative complementary heating system including photovoltaic power generation, solar energy, gas boilers, and heat pump units. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0061] Among them, the intelligent control module is used to control the intelligent control module, photovoltaic heating module, solar heating module, gas boiler heating module, and heat pump unit heating module. According to the heating situation, reasonably control one or more groups of modules to supply heat simultaneously.

[0062] Example 8:

[0063] This embodiment provides a multi-source collaborative complementary heating system including photovoltaic power generation, solar energy, gas boilers, and heat pump units. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0064] The specific control method of the intelligent control module includes:

[0065] Set the maximum and minimum temperature values in the storage water tank. When the water temperature in the storage water tank is relatively high, each module stops heating. When the water tank temperature is lower than the set threshold, start one or more groups of modules to supply heat;

[0066] Detect whether there is sunlight on the current day and whether the sunlight is sufficient through a light sensor. When the sunlight is sufficient, the photovoltaic heating module and the water heating system are the main heating modules;

[0067] When the sunlight is insufficient, on the premise that the photovoltaic heating module and the water heating system supply heat, start one of the gas boiler heating module or the heat pump unit heating module to supply heat;

[0068] When there is no sunlight, supply heat with one of the gas boiler heating module and the heat pump unit heating module or supply heat with both modules simultaneously.

[0069] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are only illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A multi - collaborative complementary heating system for photovoltaic power generation, solar energy, gas boilers and heat pump units Comprising, characterized in that it includes: A water heating system, a heating method using hot water as the heat transfer medium, and then transported through pipes to heat dissipation devices to release heat; A water storage tank for storing water, and the water storage tank is connected to the water heating system; A photovoltaic heating module that converts solar energy into electrical energy through photovoltaic panels, and then uses the electrical energy to drive a heat pump, an electric boiler or a resistance wire to heat the water in the water storage tank; A solar heating module that directly utilizes the thermal effect of solar energy, absorbs sunlight through a collector to heat the heat transfer medium, and then transfers the heat to the water storage tank or the heating system through a heat exchanger; A gas boiler heating module that releases heat energy by fuel combustion and transfers the heat to the water storage tank or the heating system through heat exchange; A heat pump unit heating module that absorbs heat from a low-temperature heat source, uses electrical energy to drive a compressor to raise the temperature, and then releases higher-grade heat energy to the room; An intelligent control module that is connected to the water heating system, the photovoltaic heating module, the solar heating module, the gas boiler heating module, the heat pump unit heating module, and the water storage tank.

2. The multi - collaborative complementary heating system of photovoltaic power generation, solar energy, gas boiler and heat pump unit according to claim 1, characterized in that, Light sensors are provided in both the photovoltaic heating module and the solar heating module.

3. A multi - collaborative complementary heating system for photovoltaic power generation, solar energy, gas boilers and heat pump units according to claim 1, characterized in that, A control system is provided in the water heating system, and the temperature control system is used to control the temperature of the electric heating device.

4. A photovoltaic power generation, solar energy, gas boiler and heat pump unit multi - collaborative complementary heating system according to claim 1, characterized in that, A temperature sensor is provided in the water storage tank for monitoring the temperature of the water inside the water storage tank.

5. A multi-source collaborative complementary heating system for photovoltaic power generation, solar energy, gas boilers and heat pump units according to claim 1, characterized in that, A water level sensor is provided in the water storage tank for monitoring the water level height inside the water storage tank.

6. A multi - collaborative complementary heating system for photovoltaic power generation, solar energy, gas boilers and heat pump units according to claim 1, characterized in that, The heat pump unit heating module includes an evaporator, a compressor, a condenser, and an expansion valve.

7. A multi - collaborative complementary heating system for photovoltaic power generation, solar energy, gas boilers and heat pump units according to claim 1, characterized in that, The low-temperature heat source of the heat pump unit is air, soil, or water.

8. A multi - collaborative complementary heating system for photovoltaic power generation, solar energy, gas boilers and heat pump units according to claim 1, characterized in that, The intelligent control module is used to control the intelligent control module, the photovoltaic heating module, the solar heating module, the gas boiler heating module, and the heat pump unit heating module.

9. A multi - collaborative complementary heating system for photovoltaic power generation, solar energy, gas boilers and heat pump units according to claim 1, characterized in that, The specific control method controlled by the intelligent control module includes: Setting the maximum temperature value and the minimum temperature value in the water storage tank. When the water temperature in the water storage tank is relatively high, each module stops heating. When the water tank temperature is lower than the set threshold, start one or more groups of modules for heating; Detecting whether there is sunlight on the current day and whether the light is sufficient through the light sensor. When the light is sufficient, the photovoltaic heating module and the water heating system are the main heating modules; When the light is insufficient, on the premise that the photovoltaic heating module and the water heating system are heating, start one of the gas boiler heating module or the heat pump unit heating module for heating; When there is no light, heat with one of the gas boiler heating module and the heat pump unit heating module or heat with both modules simultaneously.

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