CN104657539B - A kind of building energy consumption acquisition methods based on country building reference room heat model - Google Patents
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Abstract
The present invention relates to a kind of building energy consumption acquisition methods based on country building reference room heat model, comprise the following steps：1) design conditions for building reference room heat model of establishing communities are obtained；2) meteorological data of region where collection country building；3) meteorological data of region according to where the design conditions of country building heat model and country building, which is established communities, builds the heat model of reference room；4) power consumption values of country building reference room are obtained according to country building reference room heat model, and then calculate the power consumption values of country building.Compared with prior art, the present invention has the advantages that with strong points, method is simple, reliability is high, computational efficiency is high.
Description
Technical Field
The invention relates to an energy consumption obtaining method, in particular to a building energy consumption obtaining method based on a village and town building reference room heat model.
Background
The building energy consumption calculation mainly takes building heating and air conditioning energy consumption as main research objects. When the earliest calculation of building energy consumption started in the energy crisis of the 20 th century and the 70 th era, people urgently need to know how much energy is used by a building, and more importantly, how much energy can be used by the building, so that the limitation on economic development and social progress brought by the energy crisis is relieved. The energy consumption calculation method mainly comprises a simplification method and a dynamic simulation method.
Common simplified calculation methods include a degree-of-day method, an equivalent full-load operation method, an effective heat transfer coefficient method and a widely used temperature-frequency method. The method is simple in theory, simple and convenient in calculation and easy to popularize in the field of engineering practice. For simplified computational methods, only isolated building elements are analyzed, and such methods assume that each building element acts independently on the spatial environment without affecting each other. This is the biggest problem in simplifying the calculation method. In fact, the mutual relations exist among all elements forming the building, such as the building envelope, the air conditioning system, the indoor equipment and the like, and the mutual relations affect the energy consumption of the building to a great extent.
With the combination of computer technology and energy consumption calculation methods, dynamic building energy consumption simulation appears, and the method calculates the time-by-time building energy consumption meeting the indoor environment requirements according to the time-by-time changing information such as outdoor meteorological data, indoor personnel activity conditions, indoor heat sources and the like. The core of dynamic energy consumption simulation is an energy consumption dynamic calculation method, which enables the energy consumption simulation to be more accurate and the calculation capability to be stronger. The dynamic energy consumption calculation method improves the energy consumption calculation accuracy, but a complex heat transfer equation needs to be established, a complex equation solving method is adopted, and different solving methods and equation parameter settings can cause great difference of calculation results.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a building energy consumption obtaining method based on a village and town building reference room heat model.
The purpose of the invention can be realized by the following technical scheme:
a building energy consumption obtaining method based on a village and town building reference room heat model comprises the following steps:
1) acquiring a calculation condition for establishing a village and town building reference room heat model;
2) acquiring meteorological data of a region where a village and town building is located;
3) establishing a heat model of a village and town building reference room according to the calculation conditions of the village and town building heat model and meteorological data of the region where the village and town building is located:
wherein Q ist(τ) is the net heat gain of the air in the space, Q, over the time interval τenvFor heat transfer through the building envelope, QglassAmount of solar radiation, Q, entering the space through the glasspFor heat dissipation of the human body, QairHeat brought in by air seepage, QeFor heat dissipation of indoor equipment, QxHeat storage capacity of the building envelope, QacProviding heat for air conditioning or heating equipment to remove from or to the interior of the space;
4) and obtaining the energy consumption value of the reference room of the village and town building according to the heat model of the reference room of the village and town building, and further calculating the energy consumption value of the common village and town building.
The step 3) specifically comprises the following steps:
31) respectively calculate Qenv、Qglass、Qp、Qair、QeAnd QxThe calculation formula is:
Qenv＝Qwall+Qcurtain＝∑Ki(tout-tin)Ai
Qp＝knq
Qair＝nk·VCρout(tout-t)/3600
Qe＝n1n2n3n4∑Pe+n5n6∑Ps
wherein, KiIs the average heat transfer coefficient of the ith enclosure in the space, toutIs the comprehensive temperature t of the outdoor surface of the ith enclosure structure in the spaceinIs the comprehensive temperature of the indoor surface of the ith enclosure structure in the space, AiIs the heat transfer area of the heat transfer surface of the ith enclosure structure in the space, Aglass,jIs the light transmission area of the jth glass window in the space, I is the intensity of the solar radiation projected onto the glass surface, τjVisible light transmittance of the jth glass window in space, αinAnd αoutIs the reflectance, rho, of the interior and exterior of a roomjIs the absorption ratio of the jth glass window in the space, CjThe sun-shading coefficient of the jth glass window in the space, k is the member clustering coefficient, n is the number of members in the space, q is the heat dissipation capacity of adult men with different activity properties, and n is the heat dissipation capacity of the adult men with different activity propertieskThe number of heat exchange times per hour of the space, V the volume of the space, C the specific heat capacity of the air outside the space, rhooutIs the outdoor air density, toutIs the outdoor air temperature, t is the space temperature, n1Is the utilization factor of the device, n2Is the load factor, n3Using the coefficients, n, for the devices simultaneously4Is a coefficient of thermal energy conversion, n5Using the coefficients, n, simultaneously for the lighting devices6For the thermal energy conversion coefficient of the lighting apparatus, PeIs the rated power, P, of the apparatussIs the power of the lighting device, kxCorrection factor for surface temperature rise of enclosure in space, SiThe heat storage coefficient of the ith enclosure structure in the space, BiIs the internal surface area of the ith enclosure in space, thetaiIs the ith enclosure density in space, ciIs the specific heat, lambda, of the ith enclosure structure in the spaceiThe thermal conductivity coefficient of the ith enclosure structure in the space is shown, T is the period of the action of the thermal wave, and dt is the differential of the temperature change;
32) calculating the intrinsic temperature t in the building space of the villages and townsbx；
Wherein,for the external disturbance temperature of the external decoration space,is the spatial disturbance temperature of the glass,in order to disturb the temperature of the space by the human body,the temperature disturbance brought to the indoor air seepage,temperature disturbances brought to the indoor equipment;
33) calculating the heat Q required by heating or heating equipment to be provided to the spaceacEstablishing a heat model, Q, of a reference room of a village and town buildingacThe calculation formula of (A) is as follows:
wherein rho is the density of the enclosure structure, c is the specific heat of the enclosure structure, and t0The temperature of the air is maintained as required in the space.
The calculation conditions for establishing the village and town building reference room heat model in the step 1) comprise the following conditions:
1. calculating the influence of thermal disturbance and external disturbance based on a steady-state heat conduction method;
2. each space may be spatially discontinuous due to a difference in function;
3. neglecting heat radiation between the inner surfaces of the building envelope;
4. the temperature of the air in each space is the same;
5. the heat transfer process in the space is a linear steady system;
6. after continuous cooling or heating for 1h in any space, the temperature reaches a steady state.
The meteorological data in the step 2) comprise temperature, wind speed and solar radiation intensity.
The method for calculating the energy consumption value of the common village and town building in the step 4) comprises the following steps:
and respectively calculating the heat of each structure in the common village and town building according to an energy consumption value calculation formula of the reference room of the village and town building and by combining the structure and the layout of the common village and town building, and finally adding the heat to obtain the energy consumption value of the common village and town building.
Compared with the prior art, the invention has the following advantages:
the method has strong pertinence, and partial key indexes in the energy consumption calculation method are determined through investigation and can be better suitable for calculation of village and town buildings in different regions.
Secondly, the method is simple, and various factors in the residential energy consumption calculation are comprehensively considered by a relatively simple method.
Thirdly, the reliability is high, the calculation assumption has certain rationality, and the engineering practicability and applicability can be ensured;
and fourthly, the calculation efficiency is high for the typical village and town houses.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
FIG. 2 is a flow chart of the calculation of the heat transfer coefficient of the glass system.
FIG. 3 is a flow chart of the frame-based heat transfer coefficient calculation.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Example (b):
as shown in fig. 1, a method for acquiring building energy consumption based on a village and town building reference room thermal model includes the following steps:
1) obtaining the calculation conditions for establishing a village and town building reference room heat model, comprising the following steps:
1. calculating the influence of thermal disturbance and external disturbance based on a steady-state heat conduction method;
2. each space may be spatially discontinuous due to a difference in function;
3. neglecting heat radiation between the inner surfaces of the building envelope;
4. the temperature of the air in each space is the same;
5. the heat transfer process in the space is a linear steady system;
6. after continuous cooling or heating for 1h in any space, the temperature reaches a steady state.
2) Acquiring meteorological data of a region where a village and town building is located;
3) establishing a heat model of a village and town building reference room according to the calculation conditions of the village and town building heat model and meteorological data of the region where the village and town building is located:
wherein Q ist(τ) is the net heat gain of the air in the space, Q, over the time interval τenvFor heat transfer through space envelopes, QglassAmount of solar radiation, Q, entering the space through the glasspFor heat dissipation of the human body, QairHeat brought in by air seepage, QeFor heat dissipation of indoor equipment, QxHeat storage capacity of the building envelope, QacProviding heat for air conditioning or heating equipment to remove from or to the interior of the space;
the method specifically comprises the following steps:
the step 3) specifically comprises the following steps:
31) respectively calculate Qenv、Qglass、Qp、Qair、QeAnd QxThe calculation formula is:
Qenv＝Qwall+Qcurtain＝∑Ki(tout-tin)Ai
Qp＝knq
Qair＝nk·VCρout(tout-t)/3600
Qe＝n1n2n3n4∑Pe+n5n6∑Ps
wherein, KiIs the first in spaceAverage heat transfer coefficient of i building envelopes, toutIs the comprehensive temperature t of the outdoor surface of the ith enclosure structure in the spaceinIs the comprehensive temperature of the indoor surface of the ith enclosure structure in the space, AiIs the heat transfer area of the heat transfer surface of the ith enclosure structure in the space, Aglass,jIs the light transmission area of the jth glass window in the space, I is the intensity of the solar radiation projected onto the glass surface, τjVisible light transmittance of the jth glass window in space, αinAnd αoutIs the reflectance, rho, of the interior and exterior of a roomjIs the absorption ratio of the jth glass window in the space, CjThe sun-shading coefficient of the jth glass window in the space, k is the member clustering coefficient, n is the number of members in the space, q is the heat dissipation capacity of adult men with different activity properties, and n is the heat dissipation capacity of the adult men with different activity propertieskThe number of heat exchange times per hour of the space, V the volume of the space, C the specific heat capacity of the air outside the space, rhooutIs the outdoor air density, toutIs the outdoor air temperature, t is the space temperature, n1Is the utilization factor of the device, n2Is the load factor, n3Using the coefficients, n, for the devices simultaneously4Is a coefficient of thermal energy conversion, n5Using the coefficients, n, simultaneously for the lighting devices6For the thermal energy conversion coefficient of the lighting apparatus, PeIs the rated power, P, of the apparatussIs the power of the lighting device, kxCorrection factor for surface temperature rise of enclosure in space, SiThe heat storage coefficient of the ith enclosure structure in the space, BiIs the internal surface area of the ith enclosure in space, thetaiIs the ith enclosure density in space, ciIs the specific heat, lambda, of the ith enclosure structure in the spaceiThe thermal conductivity coefficient of the ith enclosure structure in the space is shown, T is the period of the action of the thermal wave, and dt is the differential of the temperature change;
32) calculating the intrinsic temperature t in the building space of the villages and townsbx；
Wherein,for the external disturbance temperature of the external decoration space,is the spatial disturbance temperature of the glass,the disturbance of the human body to the temperature of the space,the temperature disturbance brought to the indoor air seepage,temperature disturbances brought to the indoor equipment;
33) calculating the heat Q required by heating or heating equipment to be provided to the spaceacEstablishing a heat model, Q, of a reference room of a village and town buildingacThe calculation formula of (A) is as follows:
wherein rho is the density of the enclosure structure, c is the specific heat of the enclosure structure, and t0The temperature of the air is maintained as required in the space.
4) And obtaining the energy consumption value of the reference room of the village and town building according to the heat model of the reference room of the village and town building, and further calculating the energy consumption value of the village and town building.
QacThe method represents the energy consumption amount of the space required to reach the ideal temperature, and is the core of calculating the energy consumption of the village and town buildings by a finite space dynamic method. And assuming that the calculation step length is 1h, the hourly energy consumption of the village and town buildings can be calculated.
The finite space dynamic method is used for calculating the basic parameters of the energy consumption of the buildings in villages and towns and needs to be obtained through a large amount of research. The room space design and the enclosure form of different regions are related to the local economic, cultural and regional characteristics. The system can be divided into living room, bedroom, warehouse, kitchen and toilet according to different functions of village and town rooms. According to the research result, the activity condition of personnel, the condition of energy utilization equipment and the like in different rooms can be determined. The calculation flow for the heat transfer coefficient calculation of the enclosure system in the energy consumption calculation method is shown in fig. 2 and 3.
And determining the building energy consumption of a building reference room of a village and town in a certain area through research. And calculating the building energy consumption by taking the room as a reference, wherein the weather conditions of different regions can adopt the time-by-time weather conditions of each region, including temperature, wind speed, solar radiation intensity and the like.
When calculating, the essential temperature of rooms except for heating or cooling such as bedrooms is calculated. The influence of adjacent rooms can not be considered during calculation, and outdoor calculated temperature is taken as the external temperature. When heating or cooling rooms such as a bedroom are calculated, the influence between adjacent rooms needs to be considered.
Claims (4)
1. A building energy consumption obtaining method based on a village and town building reference room heat model is characterized by comprising the following steps:
1) acquiring a calculation condition for establishing a village and town building reference room heat model, wherein the calculation condition for establishing the village and town building reference room heat model in the step 1) comprises the following conditions:
1. calculating the influence of thermal disturbance and external disturbance based on a steady-state heat conduction method;
2. the space functions are different;
3. neglecting heat radiation between the inner surfaces of the building envelope;
4. the temperature of the air in each space is the same;
5. the heat transfer process in the space is a linear steady system;
6. after continuous cooling or heating for 1h in any space, the temperature reaches a steady state;
2) acquiring meteorological data of a region where a village and town building is located;
3) establishing a heat model of a village and town building reference room according to the calculation conditions of the village and town building heat model and meteorological data of the region where the village and town building is located:
wherein Q ist(τ) is the net heat gain of the air in the space, Q, over the time interval τenvFor heat transfer through the building envelope, QglassAmount of solar radiation, Q, entering the space through the glasspFor heat dissipation of the human body, QairHeat brought in by air seepage, QeFor heat dissipation of indoor equipment, QxHeat storage capacity of the building envelope, QacProviding heat for air conditioning or heating equipment to remove from or to the interior of the space;
4) and obtaining the energy consumption value of the reference room of the village and town building according to the heat model of the reference room of the village and town building, and further calculating the energy consumption value of the common village and town building.
2. The method for acquiring building energy consumption based on the village and town building reference room thermal model as claimed in claim 1, wherein said step 3) specifically comprises the following steps:
31) respectively calculate Qenv、Qglass、Qp、Qair、QeAnd QxThe calculation formula is:
Qenv＝Qwall+Qcurtain＝∑Ki(tout-tin)Ai
Qp＝knq
Qair＝nk·VCρout(tout-t)/3600
Qe＝n1n2n3n4∑Pe+n5n6∑Ps
wherein, KiIs the average heat transfer coefficient of the ith enclosure in the space, toutIs the comprehensive temperature t of the outdoor surface of the ith enclosure structure in the spaceinIs the comprehensive temperature of the indoor surface of the ith enclosure structure in the space, AiIs the heat transfer area of the heat transfer surface of the ith enclosure structure in the space, Aglass,jIs the light transmission area of the jth glass window in the space, I is the intensity of the solar radiation projected onto the glass surface, τjVisible light transmittance of the jth glass window in space, αinAnd αoutIs the reflectance, rho, of the interior and exterior of a roomjIs the absorption ratio of the jth glass window in the space, CjThe sun-shading coefficient of the jth glass window in the space, k is the member clustering coefficient, n is the number of members in the space, q is the heat dissipation capacity of adult men with different activity properties, and n is the heat dissipation capacity of the adult men with different activity propertieskThe number of heat exchange times per hour of the space, V the volume of the space, C the specific heat capacity of the air outside the space, rhooutIs the outdoor air density, toutIs the outdoor air temperature, t is the space temperature, n1Is the utilization factor of the device, n2Is the load factor, n3Using the coefficients, n, for the devices simultaneously4Is a coefficient of thermal energy conversion, n5Using the coefficients, n, simultaneously for the lighting devices6For the thermal energy conversion coefficient of the lighting apparatus, PeIs the rated power, P, of the apparatussIs the power of the lighting device, kxCorrection factor for surface temperature rise of enclosure in space, SiThe heat storage coefficient of the ith enclosure structure in the space, BiIs the internal surface area of the ith enclosure in space, thetaiIs the ith enclosure density in space, ciIs the specific heat, lambda, of the ith enclosure structure in the spaceiThe thermal conductivity coefficient of the ith enclosure structure in the space is shown, T is the period of the action of the thermal wave, and dt is the differential of the temperature change;
32) calculating the intrinsic temperature t in the building space of the villages and townsbx；
Wherein,for the external disturbance temperature of the external decoration space,is the spatial disturbance temperature of the glass,in order to disturb the temperature of the space by the human body,the temperature disturbance brought to the indoor air seepage,temperature disturbances brought to the indoor equipment;
33) calculating the heat Q required by heating or heating equipment to be provided to the spaceacEstablishing a heat model, Q, of a reference room of a village and town buildingacThe calculation formula of (A) is as follows:
wherein rho is the density of the enclosure structure, c is the specific heat of the enclosure structure, and t0The temperature of the air is maintained as required in the space.
3. The method for acquiring building energy consumption based on the village and town building reference room thermal model as claimed in claim 1, wherein the meteorological data in step 2) comprises temperature, wind speed and solar radiation intensity.
4. The method for acquiring building energy consumption based on the village and town building reference room thermal model as claimed in claim 1, wherein the method for calculating the energy consumption value of the common village and town building in step 4) comprises:
and respectively calculating the heat of each structure in the common village and town building according to an energy consumption value calculation formula of the reference room of the village and town building and by combining the structure and the layout of the common village and town building, and finally adding the heat to obtain the energy consumption value of the common village and town building.
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| CN105389419A (en) * | 2015-10-19 | 2016-03-09 | 上海市建筑科学研究院(集团)有限公司 | Simple and easy method for energy-saving effect evaluation of residential buildings |
| CN107025334B (en) * | 2017-03-10 | 2020-05-12 | 国网吉林省电力有限公司 | Method and device for establishing overall dynamic model of heat users of central heating system |
| CN107120721B (en) * | 2017-05-25 | 2019-08-09 | 石家庄华浩能源科技有限公司 | A kind of central heating dynamic gas candidate compensation method |
| CN107479959B (en) * | 2017-08-18 | 2020-07-28 | 湖南优美科技发展有限公司 | Smart city management system |
| CN108447002A (en) * | 2018-01-19 | 2018-08-24 | 徐永凯 | Open room management method, system and storage medium in hotel |
| CN109162619B (en) * | 2018-08-31 | 2020-06-16 | 北京工业大学 | Intelligent outer window optimization regulation and control method based on energy conservation |
| CN109917706B (en) * | 2019-03-06 | 2021-07-30 | 重庆房地产职业学院 | Residential building energy-saving effect monitoring system and method based on big data |
| CN110097217B (en) * | 2019-04-16 | 2023-04-07 | 天津大学 | Building dynamic room temperature prediction method based on equivalent RC model |
| CN111550866A (en) * | 2020-05-18 | 2020-08-18 | 北京嘉洁能科技股份有限公司 | Method and system for acquiring heat energy consumption of carbon fiber electric heating based on climate compensation |
| CN114398802B (en) * | 2022-02-25 | 2023-08-25 | 华北电力大学 | Building dynamic thermal response simulation method for coupling convection radiation ratio of heating tail end |
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