CN111784118A - Building energy conservation judgment method based on renewable energy utilization rate of public building - Google Patents

Building energy conservation judgment method based on renewable energy utilization rate of public building Download PDF

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CN111784118A
CN111784118A CN202010531152.XA CN202010531152A CN111784118A CN 111784118 A CN111784118 A CN 111784118A CN 202010531152 A CN202010531152 A CN 202010531152A CN 111784118 A CN111784118 A CN 111784118A
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renewable energy
total
energy
energy consumption
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吴奎华
冯亮
杨波
赵韧
崔灿
杨扬
王耀雷
李昭
刘钊
邓少治
李凯
李�昊
张博颐
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State Grid Corp of China SGCC
Economic and Technological Research Institute of State Grid Shandong Electric Power Co Ltd
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State Grid Corp of China SGCC
Economic and Technological Research Institute of State Grid Shandong Electric Power Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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    • G06Q10/063—Operations research, analysis or management
    • G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
    • G06Q10/06393—Score-carding, benchmarking or key performance indicator [KPI] analysis
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/06—Electricity, gas or water supply
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

Abstract

The invention discloses a building energy conservation judgment method based on the renewable energy utilization rate of a public building, which comprises the following steps: calculating to obtain the total building energy consumption by using the building energy consumption quota and the building scale data of the building location; calculating to obtain the total available quantity of the renewable energy system by utilizing the total energy consumption and the energy consumption itemized data of the building, then calculating the proportion of the energy provided by the renewable energy system set by the project to the total energy demand of the subsystem to which the renewable energy system belongs, and finally calculating to obtain the available quantity of the renewable energy system set by the project; calculating the total energy consumption of the comprehensive building and the utilization amount of the renewable energy system to obtain the renewable energy utilization rate of the project; and further can judge the building energy-saving condition. The method standardizes calculation, is suitable for calculating the utilization rate of renewable energy sources of various types of public buildings and is very suitable for software development, and realizes the universality of calculation.

Description

Building energy conservation judgment method based on renewable energy utilization rate of public building
Technical Field
The invention relates to a building energy conservation judgment method, in particular to a building energy conservation judgment method based on the renewable energy utilization rate of a public building.
Background
In the building field, in order to promote the utilization of renewable energy, indexes of the utilization of the renewable energy are provided from the aspects of policies, standard specifications, urban planning, energy planning and the like, and the utilization rate of the renewable energy is mostly used as one of controllability indexes. However, the existing renewable energy utilization rate calculation method mostly stays at a planning level, and is difficult to effectively guide or standardize engineering project quantification and implement renewable energy. On the basis of comprehensively analyzing the existing renewable energy utilization rate calculation method, the existing renewable energy utilization rate algorithm is analyzed by using data such as building energy consumption quota, and a building energy conservation judgment method using the renewable energy utilization rate of public buildings is further provided.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a building energy-saving judging method based on the renewable energy utilization rate of a public building. The related calculation results can provide important reference basis for government departments, planning and designing units, construction units and the like.
The purpose of the invention is realized by the following technical scheme.
The invention relates to a building energy-saving judgment method based on the renewable energy utilization rate of a public building, which comprises the following steps of:
the method comprises the following steps: calculating to obtain the total building energy consumption by using the building energy consumption quota and the building scale data of the building location;
step two: calculating to obtain the total available quantity of the renewable energy system by utilizing the total energy consumption and the energy consumption itemized data of the building, then calculating the proportion of the energy provided by the renewable energy system set by the project to the total energy demand of the subsystem to which the renewable energy system belongs, and finally calculating to obtain the available quantity of the renewable energy system set by the project;
step three: calculating the total energy consumption of the comprehensive building and the utilization amount of the renewable energy system to obtain the renewable energy utilization rate of the project;
step four: and judging whether the energy-saving target of the public building is realized or not according to the obtained total building energy consumption and the renewable energy utilization rate.
The method for calculating the total energy consumption of the building in the first step comprises the following steps:
Egeneral assembly＝∑qi×Ai
In the formula: eGeneral assemblyThe total energy consumption (converted to standard coal) of the building is expressed in kg; q. q.siThe comprehensive energy consumption (converted to standard coal) of the unit building area year of the ith functional area is expressed as kg/(m)2·a)；AiRepresents the total building area (including the above-ground and underground building areas) of the ith functional area, m2(ii) a For a single functional building, AiThe total building area of the project; for comprehensive buildings, the area of underground buildings is counted as A according to the proportion of each functional area on the groundiThe specific calculation is as follows:
Ai＝Ai ground+Ai underground×Ai ground÷AOn the ground
In the formula: a. thei groundRepresents the ground building area of the ith functional area, m2；Ai undergroundRepresents the total underground building area of the ith functional area m2；AOn the groundRepresents the total building area on the ground, m2。
The method for calculating the available quantity of the renewable energy system set by the project in the step two comprises the following steps:
Ecan be used for＝∑qiAi(fElectric ifNull iRchi+fHeat iRhwi+Rei)
In the formula: eCan be used forAvailability of renewable energy system (converted to standard coal), kg; f. ofElectric iRepresenting the proportion of the total building power consumption of the ith functional area to the total building power consumption; f. ofNull iThe proportion of the air conditioner power consumption of the ith functional area to the total power consumption of the building is represented; f. ofHeat iThe ratio of the hot water energy consumption of the ith functional area to the total energy consumption of the building is represented; rchiThe proportion of the cold/heat quantity of the air conditioner provided by the renewable energy system of the ith functional area to the total cold/heat quantity of the air conditioner is represented; rchiThe ratio of the cooling/heating capacity of the cold/heat source unit (such as a ground/water source heat pump unit) of the renewable energy system to the total cooling/heating load of the air conditioning system (the arithmetic sum of the cooling capacity and the heating capacity can be simply obtained by heating in winter and cooling in summer) under the design working condition is designed; rhwiRepresenting the proportion of domestic water provided by renewable energy sources of the ith functional area; rhwiThe ratio of the design hour heat supply amount of the domestic hot water to the design hour heat consumption amount of the domestic hot water is provided for renewable energy sources; reiRepresenting the proportion of the electric quantity provided by renewable energy sources of the ith functional area; reiIs light ofThe ratio of the output power of a photovoltaic generator set (such as a photovoltaic panel) to the design load of a power supply system.
The renewable energy utilization ratio in the third step is defined as the ratio of the available amount of the renewable energy system to the total energy consumption of the building:
the utilization ratio of renewable energy is the available quantity of renewable energy system ÷ total energy consumption of building × 100%
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the invention provides a method for calculating the total utilization of a renewable energy system. The existing renewable energy utilization rate calculation method is mostly limited to a regional planning level, is lack of uniformity and operability, and is often difficult to quickly and accurately quantitatively implement renewable energy measures for specific engineering projects. And calculating to obtain the total energy consumption of the engineering project building and the available quantity of the renewable energy system according to the existing data of the building energy consumption quota, the project energy consumption and the like, and further calculating to obtain the utilization rate of the renewable energy of the building. Because the data for establishing the quota mostly come from the energy consumption generated by the actual building, the data is easy to obtain, and the utilization rate of the renewable energy is calculated by utilizing the data such as the energy consumption quota and the like, the method is convenient and fast, and is closer to the reality.
Drawings
Fig. 1 is a flowchart of a renewable energy utilization calculation method according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
On the basis of comprehensively analyzing the existing renewable energy utilization rate calculation method, the invention analyzes the existing renewable energy utilization rate algorithm by using data such as building energy consumption quota and the like, and further provides a building energy conservation judgment method based on the renewable energy utilization rate of public buildings, as shown in fig. 1, the specific implementation process is as follows:
the method comprises the following steps: and calculating to obtain the total building energy consumption by using data such as the building energy consumption quota and the building scale of the building location.
The total energy consumption of the building comprises energy consumption of air conditioners, lighting sockets, domestic hot water, power and the like. The total energy consumption of the building is calculated according to the formula (1):
Egeneral assembly＝∑qi×Ai(1)
In the formula: eGeneral assemblyThe total energy consumption (converted to standard coal) of the building is expressed in kg; q. q.siThe comprehensive energy consumption (converted to standard coal) of the unit building area year of the ith functional area is expressed as kg/(m)2·a)；AiRepresents the total building area (including the above-ground and underground building areas) of the ith functional area, m2。
For single functional buildings, such as hospitals, business offices, etc., AiThe total building area of the project; for comprehensive buildings, the area of underground buildings is counted in A according to the proportion of each function area on the groundiSee formula (2) for specific calculation:
Ai＝Ai ground+Ai underground×Ai ground÷AOn the ground(2)
In the formula: a. thei groundRepresents the ground building area of the ith functional area, m2；Ai undergroundRepresents the total underground building area of the ith functional area m2；AOn the groundRepresents the total building area on the ground, m2。
The utility energy ratings are shown in table 1.
TABLE 1 comparison of comprehensive energy consumption of public buildings
Figure BDA0002535268480000041
Step two: and calculating the total available quantity of the renewable energy system by utilizing the building total energy consumption and energy consumption item data, then calculating the proportion of the energy provided by the renewable energy system set by the project to the total energy demand of the subsystem to which the renewable energy system belongs, and finally calculating the available quantity of the renewable energy system set by the project.
For public buildings, the available amount of renewable energy systems mainly refers to the amount of energy provided to the building by the renewable energy systems. For systems such as solar photovoltaic systems and wind power generation systems, the available amount of renewable energy is the generated energy of the systems. The renewable energy available amount of the solar water heating system is the heat produced by the solar water heating system consumed by a user, and the total available heat generated by the heat pump of the ground source heat pump system is the renewable energy available amount. The total energy consumption of the traditional air-conditioning/domestic hot water system is used as the available quantity of the renewable energy system, and the energy consumption of the traditional air-conditioning system and the domestic hot water system and the total building energy consumption can be calculated through data such as energy consumption quota and energy consumption subentry.
The available quantity of the renewable energy system is calculated by the formula (3):
Ecan be used for＝∑qiAi(fElectric ifNull iRchi+fHeat iRhwi+Rei) (3)
In the formula: eCan be used forAvailability of renewable energy system (converted to standard coal), kg; f. ofElectric iRepresenting the proportion of the total building power consumption of the ith functional area to the total building power consumption; f. ofNull iThe proportion of the air conditioner power consumption of the ith functional area to the total power consumption of the building is represented; f. ofHeat iThe ratio of the hot water energy consumption of the ith functional area to the total energy consumption of the building is represented; rchiThe proportion of the cold/heat quantity of the air conditioner provided by the renewable energy system of the ith functional area to the total cold/heat quantity of the air conditioner is represented; rhwiRepresenting the proportion of domestic water provided by renewable energy sources of the ith functional area; reiAnd the proportion of the electric quantity provided by renewable energy sources of the ith functional area is represented.
RchiThe heat pump unit is designed to be the ratio of the cooling/heating capacity of the cold/heat source unit (such as a ground/water source heat pump unit) of the renewable energy system to the total cooling/heating load of the air conditioning system (the arithmetic sum of the cooling capacity and the heating capacity can be simply obtained by heating in winter and cooling in summer). RhwiThe ratio of the design hour heat supply amount of the domestic hot water to the design hour heat consumption amount of the domestic hot water is provided for renewable energy sources. ReiThe ratio of the output power of a photovoltaic generator set (such as a photovoltaic panel) to the design load of a power supply system is designed.
The energy consumption and the power consumption fractional proportion of the public building are respectively shown in tables 2 and 3.
TABLE 2 comprehensive energy consumption percentage (%)
Figure BDA0002535268480000051
TABLE 3 electric power consumption percentage (%)
Figure BDA0002535268480000052
Step three: and calculating the utilization rate of the renewable energy source of the project by combining the total energy consumption of the building and the utilization amount of the renewable energy source system.
Renewable energy utilization is defined as the ratio of the available amount of the renewable energy system to the total energy consumption of the building:
the utilization ratio of renewable energy is the available quantity of renewable energy system ÷ total energy consumption of building × 100%
The renewable energy utilization can be calculated according to equation (4):
ηcan be used for＝ECan be used for÷EGeneral assembly×100 (4)
In the formula ηCan be used forRepresenting the renewable energy utilization rate; eCan be used forAvailability of renewable energy system (converted to standard coal), kg; eGeneral assemblyAnd (4) the total energy consumption (converted to standard coal) of the building is expressed in kg.
Step four: and judging whether the energy-saving target of the public building is realized or not according to the obtained total building energy consumption and the renewable energy utilization rate.
Example (b):
the building energy saving judgment method based on the renewable energy utilization rate of the public building is further explained by taking a certain star-level restaurant as an example.
Total building area of 4.7 ten thousand meters for a certain star restaurant building2(3.0 km above ground2Underground 1.7 ten thousand meters2) 7 above ground and 1 below ground. The distance between the hotel and a certain river is about 500m, the river is supposed to be used as a heating air-conditioning cold and heat source and a domestic hot water heat source, the total cold load of an air-conditioning system is 5091kW, the total heat load is 1536kW, and the hot water load is 1226 kW. A refrigerating and heat-exchanging station is arranged on the underground layer 1, and 4 refrigerating and heat-exchanging stations are adoptedOrdinary water source heat pump set (refrigerating capacity 929 kW/platform, heating capacity 958 kW/platform) and 2 high temperature water source heat pump set (refrigerating capacity 929 kW/platform, heating capacity 615 kW/platform), satisfy the cold and hot demand of project air conditioner and life hot water.
1) Building total energy consumption calculation
The project is a single functional building, and the total energy consumption (converted to standard coal) of the building is calculated according to the formula (2): eGeneral assembly＝25kg/m2×47000m2＝1175000kg。
2) Calculation of availability of renewable energy system
According to the actual project, calculating the available quantity (converted to standard coal) of the building renewable energy system according to the formula (2): eCan be used for＝1175000×(69×46×100+15×100+0)＝573518kg。
The values of the terms in the formula (2) are as follows: according to Table 2, fElectric i＝69，fNull i46; according to the table 3, the total cooling load of the project air conditioning system is 5091kW, the total heat load is 1536kW, the total refrigerating capacity of the water source heat pump unit is 5574kW, and the total heating capacity is 3832kW, so R ischi100; according to Table 2, the ratio of the energy consumption of domestic hot water and food and beverage in the project building accounts for about 31 of the total energy consumption, and the project f is used for simplifying calculationHeat i15; the hot water of the hotel is prepared by the high-temperature water source heat pump unit with the total heating capacity of 1230kW, and the domestic hot water load of the project is 1226kW, so Rhwi100; the project does not adopt a photovoltaic power generation system, so Rei＝0。
3) Renewable energy utilization calculation
η calculating the renewable energy utilization rate of the project according to the formula (4)Can be used for＝573518÷1175000×100＝48.81。
The project provides air conditioner cold and heat sources and domestic hot water heat sources for buildings by adopting the surface water source heat pump system, and the utilization rate of renewable energy sources reaches 48.81.
4) The energy consumption of the building is converted according to the total energy consumption of the building, the energy consumption of the building is about 60 degrees per year per square meter, the utilization rate of renewable energy sources reaches 48.81 percent, and the building belongs to an energy-saving building.
While the present invention has been described in terms of its functions and operations with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise functions and operations described above, and that the above-described embodiments are illustrative rather than restrictive, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the invention as defined by the appended claims.

Claims (4)

1. A building energy-saving judgment method based on renewable energy utilization rate of public buildings is characterized by comprising the following steps:
the method comprises the following steps: calculating to obtain the total building energy consumption by using the building energy consumption quota and the building scale data of the building location;
step two: calculating to obtain the total available quantity of the renewable energy system by utilizing the total energy consumption and the energy consumption itemized data of the building, then calculating the proportion of the energy provided by the renewable energy system set by the project to the total energy demand of the subsystem to which the renewable energy system belongs, and finally calculating to obtain the available quantity of the renewable energy system set by the project;
step three: calculating the total energy consumption of the comprehensive building and the utilization amount of the renewable energy system to obtain the renewable energy utilization rate of the project;
step four: and judging whether the energy-saving target of the public building is realized or not according to the obtained total building energy consumption and the renewable energy utilization rate.
2. The building energy conservation judgment method based on public building renewable energy utilization rate according to claim 1, characterized in that the calculation method of the total building energy consumption in the first step is as follows:
Egeneral assembly＝∑qi×Ai
In the formula: eGeneral assemblyThe total energy consumption (converted to standard coal) of the building is expressed in kg; q. q.siThe comprehensive energy consumption (converted to standard coal) of the unit building area year of the ith functional area is expressed as kg/(m)2·a)；AiRepresents the total building area (including the above-ground and underground building areas) of the ith functional area, m2(ii) a For single functional building，AiThe total building area of the project; for comprehensive buildings, the area of underground buildings is counted as A according to the proportion of each functional area on the groundiThe specific calculation is as follows:
Ai＝Ai ground+Ai underground×Ai ground÷AOn the ground
In the formula: a. thei groundRepresents the ground building area of the ith functional area, m2；Ai undergroundRepresents the total underground building area of the ith functional area m2；AOn the groundRepresents the total building area on the ground, m2。
3. The building energy conservation judgment method based on public building renewable energy utilization ratio according to claim 1, characterized in that the calculation method of the available quantity of the renewable energy system set by the project in the second step is as follows:
Ecan be used for＝∑qiAi(fElectric ifNull iRchi+fHeat iRhwi+Rei)
In the formula: eCan be used forAvailability of renewable energy system (converted to standard coal), kg; f. ofElectric iRepresenting the proportion of the total building power consumption of the ith functional area to the total building power consumption; f. ofNull iThe proportion of the air conditioner power consumption of the ith functional area to the total power consumption of the building is represented; f. ofHeat iThe ratio of the hot water energy consumption of the ith functional area to the total energy consumption of the building is represented; rchiThe proportion of the cold/heat quantity of the air conditioner provided by the renewable energy system of the ith functional area to the total cold/heat quantity of the air conditioner is represented; rchiThe ratio of the cooling/heating capacity of the cold/heat source unit (such as a ground/water source heat pump unit) of the renewable energy system to the total cooling/heating load of the air conditioning system (the arithmetic sum of the cooling capacity and the heating capacity can be simply obtained by heating in winter and cooling in summer) under the design working condition is designed; rhwiRepresenting the proportion of domestic water provided by renewable energy sources of the ith functional area; rhwiThe ratio of the design hour heat supply amount of the domestic hot water to the design hour heat consumption amount of the domestic hot water is provided for renewable energy sources; reiIndicating the amount of electricity provided by renewable energy in the ith functional areaA ratio; reiThe ratio of the output power of a photovoltaic generator set (such as a photovoltaic panel) to the design load of a power supply system is designed.
4. The building energy conservation judgment method based on public building renewable energy utilization ratio according to claim 1, wherein the renewable energy utilization ratio in step three is defined as the ratio of the available amount of the renewable energy system to the total building energy consumption:
the utilization ratio of renewable energy is the available quantity of a renewable energy system ÷ total energy consumption of a building x 100%.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114169797A (en) * 2021-12-17 2022-03-11 江苏斯菲尔电气股份有限公司 Energy management system and method
CN114719910A (en) * 2022-04-22 2022-07-08 一方设计集团有限公司 Energy consumption analysis method and system for independent rooms of office building

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
马俊: "公共建筑可再生能源利用率计算方法研究", 《建筑节能》, vol. 10, no. 2, pages 29 - 31 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114169797A (en) * 2021-12-17 2022-03-11 江苏斯菲尔电气股份有限公司 Energy management system and method
CN114719910A (en) * 2022-04-22 2022-07-08 一方设计集团有限公司 Energy consumption analysis method and system for independent rooms of office building

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