Solar system design method, device, equipment, medium and product for public buildings

Abstract

The present invention is applicable to the technical field of solar energy system design, and provides a solar energy system design method, device, equipment, medium and product for public buildings. The method includes: obtaining the building parameters, heat consumption parameters, installation parameters of the solar thermal system and installation parameters of the photovoltaic system of the public building; determining the effective total roof area of the public building according to the building parameters; respectively determining the energy-saving benefits and expected revenues of the public building under three installation schemes according to the effective total roof area, heat consumption parameters, installation parameters of the solar thermal system and installation parameters of the photovoltaic system; wherein, the three installation schemes include installing the solar thermal system alone, installing the photovoltaic system alone, and installing the solar thermal + photovoltaic system; determining the solar energy system installation scheme of the public building from the three installation schemes according to the energy-saving benefits and expected revenues of the public building under the three installation schemes. The present invention can assist in making decisions on the solar energy application forms of public buildings.

Description

Technical Field

[0001] The present invention belongs to the technical field of solar energy system design, and particularly relates to a method, device, equipment, medium and product for designing a solar energy system for public buildings. Background Art

[0002] Developing and utilizing clean energy with huge resource potential is an important topic related to the sustainable development of the national economy.

[0003] Solar energy is a clean and continuous radiant energy. Due to the large roof area and high energy consumption of public buildings, it has become an ideal scenario for the efficient utilization of solar energy resources. In public buildings, the roof space can be used to install a solar water heating system, which can not only meet the daily hot water demand but also effectively reduce the consumption of traditional energy. A photovoltaic power generation system can also be installed, which can not only achieve self-use of electricity in the building but also grid-connect the excess electricity to create additional economic benefits.

[0004] However, in actual applications, when considering whether to install a photovoltaic system or a solar thermal system on the roof of a public building, existing projects often focus on a single factor. If the decision-making in the scheme stage is wrong, it is not only difficult to achieve the energy-saving effect but also may cause waste of resources and low economic benefits. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a method, device, equipment, medium and product for designing a solar energy system for public buildings to assist in making decisions on the solar energy application forms for public buildings.

[0006] The first aspect of the embodiments of the present invention provides a method for designing a solar energy system for public buildings, including:

[0007] Obtain the building parameters, heat usage parameters, installation parameters of the solar thermal system, and installation parameters of the photovoltaic system of the public building;

[0008] Determine the effective total roof area of the public building according to the building parameters;

[0009] Determine the energy-saving benefits and expected revenues of the public building under three installation schemes respectively according to the effective total roof area, the heat usage parameters, the installation parameters of the solar thermal system, and the installation parameters of the photovoltaic system; wherein, the three installation schemes include installing the solar thermal system alone, installing the photovoltaic system alone, and installing the solar thermal + photovoltaic system;

[0010] Determine the installation scheme of the solar energy system of the public building from the three installation schemes according to the energy-saving benefits and expected revenues of the public building under the three installation schemes.

[0011] In a possible implementation, determining the energy-saving benefits and expected returns of the public building under separate installation of a solar thermal system includes:

[0012] Determining the daily average hot water consumption according to the heat usage parameters;

[0013] Determining the daily average hot water production according to the effective total roof area;

[0014] Determining the smaller value between the daily average hot water consumption and the daily average hot water production as the actual daily average hot water production;

[0015] Determining the energy-saving benefits and expected returns of the public building under separate installation of a solar thermal system according to the actual daily average hot water production and the installation parameters of the solar thermal system.

[0016] In a possible implementation, the determining the energy-saving benefits and expected returns of the public building under separate installation of a solar thermal system according to the actual daily average hot water production and the installation parameters of the solar thermal system includes:

[0017] Determining the annual power savings and construction costs of the public building under separate installation of a solar thermal system according to the actual daily average hot water production and the installation parameters of the solar thermal system;

[0018] Determining the energy-saving benefits and expected returns of the public building under separate installation of a solar thermal system according to the annual power savings and construction costs of the public building under separate installation of a solar thermal system.

[0019] In a possible implementation, determining the energy-saving benefits and expected returns of the public building under separate installation of a photovoltaic system includes:

[0020] Determining the annual power savings and construction costs of the public building under separate installation of a photovoltaic system according to the effective total roof area and the installation parameters of the photovoltaic system;

[0021] Determining the energy-saving benefits and expected returns of the public building under separate installation of a photovoltaic system according to the annual power savings and construction costs of the public building under separate installation of a photovoltaic system.

[0022] In a possible implementation, determining the energy-saving benefits and expected returns of the public building under installation of a solar thermal + photovoltaic system includes:

[0023] Determining the usage area of the solar thermal system of the public building under installation of a solar thermal + photovoltaic system according to the actual daily average hot water production;

[0024] Determining the usage area of the photovoltaic system of the public building under installation of a solar thermal + photovoltaic system according to the effective total roof area and the usage area of the solar thermal system;

[0025] Determine the annual power savings and construction cost of the solar thermal system according to the usage area of the solar thermal system;

[0026] Determine the annual power savings and construction cost of the photovoltaic system according to the usage area of the photovoltaic system;

[0027] Determine the total annual power savings according to the annual power savings of the solar thermal system and the photovoltaic system;

[0028] Determine the total construction cost according to the construction costs of the solar thermal system and the photovoltaic system;

[0029] Determine the energy-saving benefit and expected return of the public building with the solar thermal + photovoltaic system installed according to the total annual power savings and the total construction cost.

[0030] In a possible implementation manner, the determining the usage area of the solar thermal system of the public building with the solar thermal + photovoltaic system installed according to the actual daily average hot water production amount includes:

[0031] According to Determine the usage area of the solar thermal system of the public building with the solar thermal + photovoltaic system installed;

[0032] wherein, is the usage area of the solar thermal system; is the actual daily average hot water production amount; is the constant pressure specific heat capacity of water; is the target design temperature of the water in the storage tank; is the initial design temperature of the water in the storage tank; is the annual average daily solar irradiance on the light collecting surface of the collector; is the annual average heat collection efficiency of the collector; is the heat loss rate of the storage tank and the pipeline.

[0033] A second aspect of the embodiments of the present invention provides a solar energy system design device for a public building, including:

[0034] An acquisition module, configured to acquire building parameters, heat usage parameters, solar thermal system installation parameters, and photovoltaic system installation parameters of a public building;

[0035] A processing module, configured to determine the effective total roof area of the public building according to the building parameters; and determine the energy-saving benefits and expected returns of the public building under three installation schemes respectively according to the effective total roof area, the heat usage parameters, the solar thermal system installation parameters, and the photovoltaic system installation parameters; wherein, the three installation schemes include installing the solar thermal system alone, installing the photovoltaic system alone, and installing the solar thermal + photovoltaic system;

[0036] A determination module, configured to determine the solar system installation plan for the public building from the three installation plans according to the energy-saving benefits and expected revenues of the public building under the three installation plans.

[0037] A third aspect of the embodiments of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method in the above-mentioned first aspect or any implementation manner of the first aspect are implemented.

[0038] A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the steps of the method in the above-mentioned first aspect or any implementation manner of the first aspect are implemented.

[0039] A fifth aspect of the embodiments of the present invention provides a computer program product, including a computer program, and when the computer program is executed by a processor, the steps of the method in the above-mentioned first aspect or any implementation manner of the first aspect are implemented.

[0040] The beneficial effects of the embodiments of the present invention compared with the prior art are as follows:

[0041] The embodiments of the present invention can calculate the effective total roof area of a public building according to the building parameters, heat consumption parameters, solar thermal system installation parameters, and photovoltaic system installation parameters of the public building, and further automatically calculate the energy-saving benefits and expected revenues of the public building in three cases: installing a solar thermal system alone, installing a photovoltaic system alone, and installing a solar thermal + photovoltaic system, so as to assist designers in making decisions on the solar energy application form of the public building, improve the energy-saving effect of the solar system, reduce resource waste, and improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0043] Figure 1 It is a schematic flowchart of the implementation of the solar system design method for a public building provided by the embodiments of the present invention;

[0044] Figure 2 It is a logic diagram of the solar system design method for a public building provided by the embodiments of the present invention;

[0045] Figure 3 is a schematic diagram of a solar energy system design device for a public building provided by an embodiment of the present invention;

[0046] Figure 4 is a schematic diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0048] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below for illustration.

[0049] Public building roofs can usually be equipped with photovoltaic systems and solar thermal systems. Solar thermal systems and photovoltaic systems are two different solar energy utilization technologies.

[0050] Solar thermal system uses solar collectors to convert solar radiation into heat energy to achieve functions such as hot water supply, heating, and cooling. Solar collectors are usually composed of heat absorbing plates, insulation layers, and shells. After absorbing solar radiation, the heat absorbing plates convert it into heat energy, which increases the temperature of the working medium (such as water or antifreeze) in the collector, and then transfers the heat to where it is needed through the circulation system.

[0051] Photovoltaic systems use solar cells to directly convert solar radiation into electrical energy. Solar cells are made of semiconductor materials. When sunlight shines on the surface of the cell, the photon energy is transferred to the electrons in the semiconductor, causing the electrons to jump into free electrons, thereby generating current. Multiple solar cells are connected in series or in parallel to form a solar panel, and then the direct current is converted into alternating current through inverters and other equipment for users to use or to be connected to the power grid.

[0052] As for whether a photovoltaic system or a solar thermal system should be installed on the roof of a public building, existing projects are often limited to a single factor when considering it. If the decision is wrong at the planning stage, it will not only be difficult to achieve the desired energy-saving effect, but it may also cause waste of resources and low economic benefits. To this end, this embodiment provides a solar energy system design method for a public building to assist in determining the form of roof solar energy application at the project planning stage, determine from multiple angles and finally make a decision, so that the solar energy system (photovoltaic, solar thermal or photovoltaic + solar thermal) has better energy-saving effects and economic benefits.

[0053] Figure 1It is a schematic diagram of the implementation process of the solar energy system design method for public buildings provided by an embodiment of the present invention, including:

[0054] Step S101, obtain the building parameters, heat consumption parameters, installation parameters of the solar thermal system, and installation parameters of the photovoltaic system of the public building.

[0055] The necessary building parameters of the public building are: the area of each roof participating in the calculation. The parameters that can be selected for input include building category, space type, installation inclination and azimuth angle of the collector and photovoltaic module, etc. In some scenarios of inclined roofs, the installation inclination of the collector of the solar thermal system and the photovoltaic cell module of the photovoltaic system may be the same as the roof inclination, and the roof inclination can be directly used as the installation inclination. For scenarios where the inclinations of the two are different, a specially designed installation inclination can be used to replace the roof inclination. The value of the component azimuth angle is the same as the above. It should be noted that the two factors of component inclination and azimuth angle mainly affect the compensation area ratio of the roof.

[0056] The heat consumption parameter can be the water consumption unit of hot water (usually the number of water users).

[0057] The installation parameters of the solar thermal system can include but are not limited to: the constant pressure specific heat capacity of water, the target design temperature of water in the storage tank, the initial design temperature of water in the storage tank, the annual average heat collection efficiency of the collector, the heat loss rate of the storage tank (tank) and pipeline in the solar thermal system, etc.

[0058] The installation parameters of the photovoltaic system can include but are not limited to: the installation capacity of the module, the comprehensive efficiency coefficient, the area of a single photovoltaic module, the power generation power of a single photovoltaic module, etc.

[0059] Step S102, determine the effective total area of the roof of the public building according to the building parameters.

[0060] There may be some areas on the roof that are not suitable for installing the solar thermal system or the photovoltaic system, which need to be deducted from the total area. For example, there are equipment such as air conditioning units and water tanks on the roof, and these equipment will occupy a certain amount of roof space, and should be deducted according to their actual floor area. Deducting the floor area of the above equipment from the calculated total roof area can obtain the actual total roof area.

[0061] Furthermore, according to the inclination and azimuth angle of the collector of the solar thermal system and the photovoltaic cell module of the photovoltaic system, the compensation area ratio can be calculated (for example, by taking values from the compensation area ratio table), and then the effective total area of the roof can be calculated through the following formula :

[0062]

[0063] In the formula, is the effective total area of the roof; is the actual total roof area; is the compensation area ratio. In this embodiment, the compensation area ratio can be automatically selected after the installation inclination angle and azimuth angle are selected.

[0064] Step S103: According to the effective total roof area, heat utilization parameters, solar thermal system installation parameters, and photovoltaic system installation parameters, determine the energy-saving benefits and expected revenues of public buildings under three installation schemes respectively; among them, the three installation schemes include installing the solar thermal system alone, installing the photovoltaic system alone, and installing the solar thermal + photovoltaic system.

[0065] When evaluating the solar energy utilization scheme for public buildings, multiple factors need to be comprehensively considered to determine the energy-saving benefits and expected revenues under different installation schemes. First, clarify the key basic data of the effective total roof area, which limits the upper limit of the installation scale of the solar thermal system and the photovoltaic system. At the same time, master the heat utilization parameters, such as the daily hot water demand of the building and its time distribution, etc., which are indispensable for accurately evaluating the role of the solar thermal system in meeting the hot water demand of the building. In addition, the solar thermal system installation parameters, such as the daylighting efficiency, heat conversion efficiency, and system heat loss rate of the collector, and the photovoltaic system installation parameters, such as the photoelectric conversion efficiency of the photovoltaic cell, the inverter efficiency, and the shadow occlusion influence coefficient, etc., are all important bases for subsequent calculations.

[0066] Based on the above data, this embodiment can automatically conduct in-depth analysis on the three solar energy installation schemes for public buildings (installing the solar thermal system alone, installing the photovoltaic system alone, and installing the solar thermal + photovoltaic system), determine the energy-saving benefits and expected revenues under these three installation schemes respectively, and provide strong support for the scientific selection of the solar energy utilization scheme for public buildings.

[0067] Step S104: According to the energy-saving benefits and expected revenues of public buildings under the three installation schemes, determine the solar energy system installation scheme for public buildings from the three installation schemes.

[0068] Exemplarily, if for the best power saving consideration, the scheme with the largest energy-saving benefit among the three installation schemes can be selected. If for the consideration of the long-term investment economic benefit, the scheme with the largest expected revenue among the three installation schemes can be selected.

[0069] The embodiment of the present invention can calculate the effective total roof area of public buildings according to the building parameters, heat utilization parameters, solar thermal system installation parameters, and photovoltaic system installation parameters of public buildings, and further automatically calculate the energy-saving benefits and expected revenues of public buildings in three cases of installing the solar thermal system alone, installing the photovoltaic system alone, and installing the solar thermal + photovoltaic system, so as to assist designers in making decisions on the solar energy application form of public buildings, improve the energy-saving effect of the solar energy system, reduce resource waste, and improve economic benefits.

[0070] The above embodiments introduce the overall concept of the present invention. The following describes the process of calculating the energy-saving benefits and expected revenues of public buildings under three installation schemes through more specific embodiments.

[0071] In one embodiment, determining the energy-saving benefits and expected revenues of a public building under the separate installation of a solar thermal system includes:

[0072] Step 1: Determine the daily average hot water consumption according to the heat usage parameters.

[0073] Daily average hot water consumption (kg) is calculated by the formula:

[0074]

[0075] In the formula, is the hot water usage unit; is the same-day usage rate, and the value can be 1; is the water usage quota (L / d·person), which is selected automatically according to the water-saving usage quota table in the specification after selecting the building category and space type; is the hot water density (kg / L), which is 0.983 kg / L at 60°C.

[0076] Step 2: Determine the daily average hot water production according to the effective total roof area.

[0077] Daily average hot water production (kg) is calculated by the formula:

[0078]

[0079] In the formula, is the effective total roof area (m 2 ); is the constant pressure specific heat capacity of water [kJ / (kg·°C)], which is taken as 4.187 kJ / (kg·°C) here; is the target design temperature (°C) of the water in the storage tank; is the initial design temperature (°C) of the water in the storage tank; is the annual average daily solar irradiance (kJ / m 2 ) on the light-receiving surface of the collector, which is taken as 16722.05 kJ / m 2 here; is the annual average heat collection efficiency (%) of the collector, which is taken as 0.45 according to experience here; is the heat loss rate of the storage tank and pipeline, which is taken as 0.15 here.

[0080] Step 3: Determine the daily average hot water consumption and the daily average hot water production The smaller value among them is the actual daily average hot water production .

[0081] Step 4: Determine the energy-saving benefits and expected returns of public buildings when installing solar thermal systems alone based on the actual daily average hot water production and the installation parameters of solar thermal systems.

[0082] First, determine the annual power savings and construction costs of public buildings when installing solar thermal systems alone based on the actual daily average hot water production and the installation parameters of solar thermal systems:

[0083] The annual power savings of the solar thermal system (kWh) is:

[0084] / 3600

[0085] In the formula, is the actual daily average hot water production (kg) of the actual solar thermal system; is the constant pressure specific heat capacity of water [kJ / (kg·°C)], taking 4.187 kJ / (kg·°C); is the target design temperature (°C) of the water in the storage tank, taking 60 °C; is the initial design temperature (°C) of the water in the storage tank, taking 15 °C.

[0086] The construction cost of the solar thermal system (10,000 yuan) is:

[0087]

[0088] Then, determine the energy-saving benefits and expected returns of public buildings when installing solar thermal systems alone based on the annual power savings and construction costs of public buildings when installing solar thermal systems alone.

[0089] The energy-saving benefits can be represented by the power savings per unit construction cost of the solar thermal system (kWh / 10,000 yuan):

[0090]

[0091] The expected returns can be represented by the following indicators:

[0092] The 10-year economic benefits of the solar thermal system :

[0093] − 0%

[0094] The cost recovery period of the solar thermal system:

[0095] ( / 10)

[0096] In one embodiment, determining the energy-saving benefits and expected returns of a public building under separate installation of a photovoltaic system includes:

[0097] Step 1: Determine the annual power savings and construction cost of the public building under separate installation of the photovoltaic system according to the effective total roof area and the installation parameters of the photovoltaic system.

[0098] Annual power savings of the photovoltaic system (kWh) is:

[0099]

[0100] Wherein, is the total solar irradiance on the horizontal plane (kW·h / m 2 ), taking 1402 kW·h / m 2 ; is the installed capacity of the module (kWp), ; is the irradiance under standard conditions, taking 1 kW·h / m 2 ; K is the comprehensive efficiency coefficient, taking 0.85; is the area of a single photovoltaic module (m 2 ), taking 2.2 m 2 . is the power generation power of a single photovoltaic module (W), taking 450 W.

[0101] Construction cost under the photovoltaic system (ten thousand yuan) is:

[0102]

[0103] Wherein, is the effective total roof area.

[0104] Step 2: Determine the energy-saving benefits and expected returns of the public building under separate installation of the photovoltaic system according to the annual power savings and construction cost of the public building under separate installation of the photovoltaic system.

[0105] The energy-saving benefits can be represented by the power savings per unit construction cost of the photovoltaic system (kWh / ten thousand yuan):

[0106]

[0107] The expected returns can be represented by the following indicators:

[0108] 10-year economic benefits of the photovoltaic system :

[0109] −

[0110] Payback period of the photovoltaic system:

[0111] ( / 10)

[0112] In one embodiment, determining the energy-saving benefits and expected returns of a public building under the installation of a solar thermal + photovoltaic system, including:

[0113] Step 1: Determine the usable area of the solar thermal system of the public building under the installation of the solar thermal + photovoltaic system according to the actual daily hot water production.

[0114] Exemplarily, it can be determined according to the usable area of the solar thermal system of the public building under the installation of the solar thermal + photovoltaic system.

[0115] In the formula, is the usable area of the solar thermal system, that is, the total collector area based on the daily hot water consumption ; is the actual daily hot water consumption; is the constant pressure specific heat capacity of water; is the target design temperature of the water in the storage tank; is the initial design temperature of the water in the storage tank; is the annual average daily solar irradiance on the light-receiving surface of the collector; is the annual average heat collection efficiency of the collector; is the heat loss rate of the storage tank and pipeline.

[0116] Step 2: Determine the usable area of the photovoltaic system of the public building under the installation of the solar thermal + photovoltaic system according to the effective total roof area and the usable area of the solar thermal system.

[0117] Usable area of the photovoltaic system - .

[0118] Step 3: Determine the annual power savings and construction cost of the solar thermal system according to the usable area of the solar thermal system. The calculation process is similar to the above and will not be elaborated here.

[0119] Step 4: Determine the annual power savings and construction cost of the photovoltaic system according to the usable area of the photovoltaic system. The calculation process is similar to the above and will not be elaborated here.

[0120] Step 5: Add the annual power savings of the solar thermal system and the photovoltaic system to obtain the total annual power savings.

[0121] Step 6: Add the construction costs of the solar thermal system and the PV system to obtain the total construction cost.

[0122] Step 7: Determine the energy-saving benefits and expected returns of the public building with the solar thermal + PV system installed based on the total annual power savings and the total construction cost.

[0123] The calculation process is similar to the above. The cost recovery period of the solar thermal + PV system is:

[0124] ( / 10)

[0125] In the formula, is the 10-year economic benefit of the solar thermal + PV system, is the total construction cost of the solar thermal + PV system.

[0126] Figure 2 FIG. is the overall logic diagram of the solar energy system design method for public buildings provided by an embodiment of the present invention. After obtaining the energy-saving benefits and expected returns of the public building under the three installation schemes, the designer can select a suitable installation scheme in combination with the measurement results according to the actual requirements. For example, considering the actual investment model of the construction unit, sometimes it only takes care of the construction and not the operation, and may tend to consider the energy-saving benefits. If the construction unit is responsible for the upfront construction + later operation investment, it may tend to consider the expected returns. Exemplarily, if it is inclined to the optimal power-saving scheme based on the construction cost, the scheme with the largest power savings per unit construction cost can be selected. If it is inclined to the optimal scheme based on the long-term investment economic benefit, the scheme with the smallest data in the cost recovery period can be selected.

[0127] Exemplarily:

[0128] In the office building in Scenario 1, the number of water users is 1100, the roof area is 1200 m 2 , the azimuth angle of the PV and solar thermal modules is 0°, and the tilt angle is 30°. Through the determination and measurement of the public building solar energy scheme, the following conclusions are obtained: The optimal scheme considering the power savings per unit construction cost is the solar thermal system, and the optimal scheme considering the long-term investment economic benefit is the solar thermal system.

[0129] In the office building in Scenario 2, the number of water users is 300, the roof area is 1200 m 2 , the azimuth angle of the PV and solar thermal modules is 0°, and the tilt angle is 30°. Through the determination and measurement of the public building solar energy scheme, the following conclusions are obtained: The optimal scheme considering the power savings per unit construction cost is the fully-covered PV system, and the optimal scheme considering the long-term investment economic benefit is the solar thermal system.

[0130] In addition to helping to determine the specific application plan of the solar energy system for public buildings, the measurement model of this embodiment can also calculate and determine the change trend, such as: comparing the change trend of the power saving per unit construction cost under different water consumption, calculating the change trend of the power saving per unit construction cost and the cost recovery period under different solar energy application areas on the roof, and assisting in the measurement of the designed usage.

[0131] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The order of execution of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0132] Figure 3 It is a schematic structural diagram of a solar energy system design device 30 for a public building provided by an embodiment of the present invention, including:

[0133] An acquisition module 31, configured to acquire the building parameters, heat usage parameters, installation parameters of the solar thermal system, and installation parameters of the photovoltaic system of the public building.

[0134] A processing module 32, configured to determine the effective total area of the roof of the public building according to the building parameters; and determine the energy-saving benefits and expected revenues of the public building under three installation schemes according to the effective total area of the roof, heat usage parameters, installation parameters of the solar thermal system, and installation parameters of the photovoltaic system; where the three installation schemes include installing the solar thermal system alone, installing the photovoltaic system alone, and installing the solar thermal + photovoltaic system.

[0135] A determination module 33, configured to determine the installation scheme of the solar energy system of the public building from the three installation schemes according to the energy-saving benefits and expected revenues of the public building under the three installation schemes.

[0136] In a possible implementation manner, the processing module 32 is configured to:

[0137] Determine the daily average hot water consumption according to the heat usage parameters;

[0138] Determine the daily average hot water production according to the effective total area of the roof;

[0139] Determine the smaller value between the daily average hot water consumption and the daily average hot water production as the actual daily average hot water production;

[0140] Determine the energy-saving benefits and expected revenues of the public building under the condition of installing the solar thermal system alone according to the actual daily average hot water production and the installation parameters of the solar thermal system.

[0141] In a possible implementation manner, the processing module 32 is configured to:

[0142] Determine the annual power savings and construction cost of a public building when installing a solar thermal system alone based on the actual daily average hot water production and the installation parameters of the solar thermal system;

[0143] Determine the energy-saving benefit and expected return of a public building when installing a solar thermal system alone based on the annual power savings and construction cost of the public building when installing a solar thermal system alone.

[0144] In a possible implementation, the processing module 32 is used for:

[0145] Determine the annual power savings and construction cost of a public building when installing a photovoltaic system alone based on the effective total roof area and the installation parameters of the photovoltaic system;

[0146] Determine the energy-saving benefit and expected return of a public building when installing a photovoltaic system alone based on the annual power savings and construction cost of the public building when installing a photovoltaic system alone.

[0147] In a possible implementation, the processing module 32 is used for:

[0148] Determine the area of the solar thermal system used in a public building when installing a solar thermal + photovoltaic system based on the actual daily average hot water production;

[0149] Determine the area of the photovoltaic system used in a public building when installing a solar thermal + photovoltaic system based on the effective total roof area and the area of the solar thermal system used;

[0150] Determine the annual power savings and construction cost of the solar thermal system based on the area of the solar thermal system used;

[0151] Determine the annual power savings and construction cost of the photovoltaic system based on the area of the photovoltaic system used;

[0152] Determine the total annual power savings based on the annual power savings of the solar thermal system and the photovoltaic system;

[0153] Determine the total construction cost based on the construction costs of the solar thermal system and the photovoltaic system;

[0154] Determine the energy-saving benefit and expected return of a public building when installing a solar thermal + photovoltaic system based on the total annual power savings and the total construction cost.

[0155] In a possible implementation, the processing module 32 is used for:

[0156] According to Determine the area of the solar thermal system used in a public building when installing a solar thermal + photovoltaic system;

[0157] Wherein, is the area of the solar thermal system used; is the actual daily average hot water production; is the constant pressure specific heat capacity of water; is the target designed temperature of the water in the storage water tank; is the initial designed temperature of the water in the storage water tank; is the annual average daily solar irradiance on the sunlight-receiving surface of the collector; is the annual average heat collection efficiency of the collector; is the heat loss rate of the storage water tank and pipelines.

[0158] The embodiment of the present invention can calculate the effective total roof area of a public building according to the building parameters, heat-using parameters, solar thermal system installation parameters, and photovoltaic system installation parameters of the public building, and further automatically calculate the energy-saving benefits and expected revenues of the public building in three cases: installing a solar thermal system alone, installing a photovoltaic system alone, and installing a solar thermal + photovoltaic system, so as to assist designers in making decisions on the solar energy application form of the public building, improve the energy-saving effect of the solar energy system, reduce resource waste, and improve economic benefits.

[0159] Figure 4 is a schematic diagram of an electronic device 40 provided by an embodiment of the present invention. As Figure 4 shown, the electronic device 40 of this embodiment includes: a processor 41, a memory 42, and a computer program 43 stored in the memory 42 and executable on the processor 41, such as a solar energy system design program for a public building. When the processor 41 executes the computer program 43, the steps in the above-mentioned embodiments of the solar energy system design method for a public building are implemented, such as Figure 1 the steps S101 to S104 shown. Alternatively, when the processor 41 executes the computer program 43, the functions of each module / unit in the above-mentioned device embodiments are implemented, such as Figure 3 the functions of the modules 31 to 34 shown.

[0160] Exemplarily, the computer program 43 can be divided into one or more modules / units, and the one or more modules / units are stored in the memory 42 and executed by the processor 41 to complete the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing specific functions, and these instruction segments are used to describe the execution process of the computer program 43 in the electronic device 40.

[0161] The electronic device 40 can be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The electronic device 40 may include, but is not limited to, a processor 41 and a memory 42. Those skilled in the art can understand, Figure 4This is only an example of the electronic device 40 and does not constitute a limitation on the electronic device 40. It may include more or fewer components than shown in the figure, or combine certain components, or different components. For example, the electronic device 40 may also include input / output devices, network access devices, buses, etc.

[0162] The so-called processor 41 may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0163] The memory 42 may be an internal storage unit of the electronic device 40, such as the hard disk or memory of the electronic device 40. The memory 42 may also be an external storage device of the electronic device 40, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc. equipped on the electronic device 40. Further, the memory 42 may also include both the internal storage unit and the external storage device of the electronic device 40. The memory 42 is used to store the computer program and other programs and data required by the electronic device 40. The memory 42 may also be used to temporarily store data that has been output or will be output.

[0164] Those skilled in the art can clearly understand that, for the convenience and conciseness of description, only the above-mentioned division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiments can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of this application. The specific working processes of the units and modules in the above system can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0165] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0166] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0167] In the embodiments provided by the present invention, it should be understood that the disclosed device / electronic device and method can be implemented in other ways. For example, the device / electronic device embodiments described above are only illustrative. For example, the division of the module or unit is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in electrical, mechanical or other forms.

[0168] The unit described as a separated component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it can be located in one place, or can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0169] In addition, in each embodiment of the present invention, each functional unit can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0170] If the above-mentioned integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, to implement all or part of the processes in the above-mentioned embodiment methods of the present invention, it can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned various method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0171] The above-mentioned embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for designing a solar energy system for a public building, characterized in that: include: Obtain the architectural parameters, heat parameters, solar thermal system installation parameters and photovoltaic system installation parameters of public buildings; Determining the total effective roof area of ​​the public building according to the building parameters; According to the total effective roof area, the heat parameters, the installation parameters of the solar thermal system and the installation parameters of the photovoltaic system, respectively determine the energy-saving benefits and expected returns of the public building under three installation schemes; wherein the three installation schemes include installing a solar thermal system alone, installing a photovoltaic system alone, and installing a solar thermal + photovoltaic system; The area of ​​the solar thermal system used in the public building when the solar thermal + photovoltaic system is installed is calculated by the following formula: ； in, The area used by the solar thermal system; is the actual daily average hot water production; is the specific heat capacity of water at constant pressure; The target design temperature of the water in the water storage tank; is the initial design temperature of water in the water storage tank; is the annual average daily solar radiation on the collector lighting surface; is the annual average thermal efficiency of the collector; is the heat loss rate of the water tank and pipeline; The energy-saving benefits and expected profits of the public building under the three installation schemes are used for designers to select a suitable installation scheme from the three installation schemes according to actual needs.

2. The solar energy system design method for a public building according to claim 1, characterized in that: Determine the energy-saving benefits and expected profits of the public building under the installation of a solar thermal system alone, including: Determine the average daily hot water consumption according to the heat consumption parameters; Determine the average daily hot water production based on the total effective roof area; Determine the smaller value between the average daily hot water consumption and the average daily hot water production as the actual average daily hot water production; The energy-saving benefits and expected profits of the public building when a solar thermal system is installed alone are determined based on the actual daily average hot water production and the installation parameters of the solar thermal system.

3. The solar energy system design method for a public building according to claim 2, wherein the energy saving benefit and expected income of the public building when the solar thermal system is installed alone are determined based on the actual daily average hot water production and the solar thermal system installation parameters, including: According to the actual daily average hot water production and the installation parameters of the solar thermal system, determine the annual electricity saving and construction cost of the public building when the solar thermal system is installed alone; The energy-saving benefits and expected profits of the public building under the installation of a solar thermal system alone are determined based on the annual electricity savings and construction costs of the public building under the installation of a solar thermal system alone.

4. The solar energy system design method for a public building according to claim 1, characterized in that: Determine the energy-saving benefits and expected profits of the public building under the installation of a photovoltaic system alone, including: Determine the annual electricity saving and construction cost of the public building when the photovoltaic system is installed alone according to the total effective roof area and the photovoltaic system installation parameters; The energy-saving benefits and expected profits of the public building under the installation of a photovoltaic system alone are determined based on the annual electricity savings and construction costs of the public building under the installation of a photovoltaic system alone.

5. The solar energy system design method for a public building as claimed in claim 2, characterized in that: Determine the energy-saving benefits and expected profits of the public buildings when installing solar thermal + photovoltaic systems, including: Determine the photovoltaic system usage area of ​​the public building when installing the photovoltaic + photovoltaic system according to the total effective roof area and the photovoltaic system usage area; Determine the annual electricity saving and construction cost of the solar thermal system based on the utilization area of ​​the solar thermal system; Determine the annual electricity saving and construction cost of the photovoltaic system based on the utilization area of ​​the photovoltaic system; Determining a total annual electricity saving based on the annual electricity saving of the solar thermal system and the photovoltaic system; Determining the total construction cost according to the construction costs of the photothermal system and the photovoltaic system; Based on the total annual electricity saving and the total construction cost, the energy-saving benefits and expected profits of the public building after installing the solar thermal + photovoltaic system are determined.

6. A solar energy system design device for a public building, characterized in that: include: An acquisition module is used to obtain the building parameters, heat parameters, solar thermal system installation parameters and photovoltaic system installation parameters of public buildings; A processing module is used to determine the total effective roof area of ​​the public building according to the building parameters; and to determine the energy-saving benefits and expected benefits of the public building under three installation schemes according to the total effective roof area, the heat usage parameters, the photothermal system installation parameters, and the photovoltaic system installation parameters; wherein the three installation schemes include installing a photothermal system alone, installing a photovoltaic system alone, and installing a photothermal + photovoltaic system; A determination module, configured to determine a solar energy system installation scheme for the public building from the three installation schemes according to the energy-saving benefits and expected benefits of the public building under the three installation schemes; The area of ​​the solar thermal system used in the public building when the solar thermal + photovoltaic system is installed is calculated by the following formula: ； in, The area used by the solar thermal system; is the actual daily average hot water production; is the specific heat capacity of water at constant pressure; The target design temperature of the water in the water storage tank; is the initial design temperature of water in the water storage tank; is the annual average daily solar radiation on the collector lighting surface; is the annual average thermal efficiency of the collector; is the heat loss rate of the water tank and pipeline; The energy-saving benefits and expected profits of the public building under the three installation schemes are used for designers to select a suitable installation scheme from the three installation schemes according to actual needs.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

9. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 1 to 5 when being executed by a processor.

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