CN108006887B - Energy model construction method for existing building air conditioner and air conditioner energy consumption prediction method - Google Patents
Energy model construction method for existing building air conditioner and air conditioner energy consumption prediction method Download PDFInfo
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- CN108006887B CN108006887B CN201711156250.4A CN201711156250A CN108006887B CN 108006887 B CN108006887 B CN 108006887B CN 201711156250 A CN201711156250 A CN 201711156250A CN 108006887 B CN108006887 B CN 108006887B
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Abstract
The invention provides a method for constructing an energy model for an existing building air conditioner, which comprises the steps of obtaining energy consumption of the building air conditioner, indoor and outdoor dry bulb temperatures, solar radiant quantity, indoor and outdoor relative humidity and rated power of each heating device in a building; calculating the energy consumption of the enclosure structure according to the outdoor dry bulb temperature, the indoor dry bulb temperature and the solar radiation amount; calculating the total energy consumption of the fresh air internal disturbance according to the energy consumption of the building air conditioner and the energy consumption of the building enclosure; calculating the per-capita fresh air volume, the number of people and the lighting and equipment use coefficients of the existing building air conditioning energy model according to the total energy consumption of fresh air internal disturbance, the indoor and outdoor dry bulb temperatures, the indoor and outdoor relative humidity and the rated power of each heating equipment in the building; and determining an energy model for the existing building air conditioner according to the average fresh air volume, the number of people and the lighting and equipment use coefficients. The method also comprises an existing building air conditioner energy consumption prediction method for predicting by using the established existing building air conditioner energy model. The air conditioning load predicted by the model is closer to the actual air conditioning load of the building.
Description
Technical Field
The invention relates to the technical field of computers, in particular to an energy model construction method for an existing building air conditioner and an air conditioner energy consumption prediction method.
Background
For the energy-saving research of the existing air-conditioning system of the large public building, in the aspect of predicting the energy consumption of the air-conditioning system of the building, the method can be roughly divided into two methods:
one is a model for building air conditioning energy is created according to an assumed building body thermophysical model; energy consumption data are further obtained by assuming indoor and outdoor environment parameters including meteorological parameters, indoor disturbance illumination and equipment operation, personnel activities, fresh air conditions and the like. However, no matter in building bodies and meteorological parameters, or in rooms, lighting and equipment operation, personnel activities, fresh air conditions and the like are based on assumed theoretical data and design working conditions, and the data deviate from the actual conditions to a certain extent, so that the result of model prediction deviates from the actual energy consumption of the air conditioner greatly.
The other type is a calculation model which is based on actual data and can be well consistent with the actual air conditioner energy consumption data through identification by a mathematical method, but the method belongs to a black box model, is limited in application, is difficult to embody the basic thermal process of a building, and is difficult to explain the composition and distribution condition of energy consumption of each part.
Disclosure of Invention
The present invention provides an existing building air conditioner energy model construction method and an existing building air conditioner energy consumption prediction method that overcome or at least partially solve the above-described problems.
In a first aspect, the present invention provides an energy model construction method for an existing building air conditioner, including:
acquiring building air conditioner energy consumption, outdoor dry bulb temperature, indoor dry bulb temperature, solar radiation quantity, indoor relative humidity, outdoor relative humidity and rated power of each heating device in a building;
calculating the energy consumption of the enclosure structure according to the outdoor dry bulb temperature, the indoor dry bulb temperature, the solar radiation quantity and a first preset relation; the first preset relation is the relation between the outdoor dry bulb temperature, the indoor dry bulb temperature, the solar radiation quantity and the energy consumption of the enclosure structure;
calculating the total energy consumption of the fresh air internal disturbance according to the building air conditioner energy consumption, the building enclosure energy consumption and a second preset relation; the second preset relationship is the relationship among the building air conditioner energy consumption, the building enclosure energy consumption and the fresh air internal disturbance energy consumption;
calculating the per-person fresh air volume, the number of people and the lighting and equipment use coefficients of the existing building air conditioning energy model according to the total energy consumption of the fresh air internal disturbance, the outdoor dry bulb temperature, the indoor relative humidity, the outdoor relative humidity, the rated power of each heating equipment in the building and a third preset relation; the third preset relation is the relation between the total energy consumption of fresh air internal disturbance and the outdoor dry bulb temperature, the indoor relative humidity, the outdoor relative humidity and the rated power of each heating device in the building;
and determining an energy model for the existing building air conditioner according to the per-person fresh air volume, the number of people and the lighting and equipment use coefficients.
Preferably, calculating the energy consumption of the building envelope according to the outdoor dry bulb temperature, the indoor dry bulb temperature, the solar radiation amount and a first preset relation, and comprises:
calculating the energy consumption of the enclosure structure according to the first preset relation and the formula (I)
u＝(QEnclosure structureΤOutdoor dry bulb temperatureQSolar radiation)T
The system comprises a plurality of nodes, a building envelope and a plurality of wall surface unit nodes, wherein C is a constant matrix and reflects the heat storage capacity of each node in the plurality of nodes under the unit temperature change, and the plurality of nodes comprise indoor nodes and each wall surface unit node which are formed by dispersing the building envelope and the indoor space; t is a matrix formed by the temperatures of a plurality of nodes, and the temperature of an indoor node is the indoor dry bulb temperature; a is a constant matrix which represents the heat flow relationship between adjacent nodes due to the temperature difference of the temperature;
a matrix composed of temperature versus time differentials for the plurality of nodes; b is a constant matrix which reflects the relation between the thermal disturbance and the action condition of the temperature of each node; qEnclosure structureEnergy consumption for the enclosure structure; gammaOutdoor dry bulb temperatureIs the outdoor dry bulb temperature; qSolar radiationIs the amount of solar radiation.
Preferably, calculating the total energy consumption of the fresh air internal disturbance according to the building air conditioner energy consumption, the building envelope energy consumption and the second preset relationship, and the method comprises the following steps:
calculating the total energy consumption of the internal disturbance of the fresh air through a formula (II) according to the building air conditioner energy consumption, the building envelope energy consumption and a second preset relation
QBuilding (2)＝QEnclosure structure+QInternal disturbance of fresh air(II)
Wherein Q isBuilding (2)For building air-conditioning energy consumption, QEnclosure structureEnergy consumption for building envelope, QInternal disturbance of fresh airThe energy consumption is the total internal disturbance energy consumption of fresh air.
Preferably, the calculation of the per-person fresh air volume, the number of people and the lighting and equipment use coefficients of the energy model for the existing building air conditioner according to the total disturbance energy consumption, the outdoor dry bulb temperature, the indoor relative humidity, the outdoor relative humidity, the rated power of each heating equipment in the building and a third preset relation includes:
calculating fresh air energy consumption per unit volume according to the outdoor dry bulb temperature, the indoor relative humidity and the outdoor relative humidity;
calculating the maximum energy consumption which can be formed by the building illumination and the sensible heat of the heating equipment according to the rated power of each heating equipment in the building;
and calculating the per-capita fresh air volume, the number of people and the use coefficient of the lighting and equipment of the existing building air conditioner energy model according to the total disturbance energy consumption, the fresh air energy consumption in unit volume and the maximum energy consumption which can be formed by the sensible heat of the building lighting and heating equipment.
Preferably, according to the outdoor dry bulb temperature, the indoor relative humidity and the outdoor relative humidity, the fresh air energy consumption of unit volume is calculated, and the method comprises the following steps:
calculating the fresh air energy consumption per unit volume by a formula (III) according to the outdoor dry bulb temperature, the indoor relative humidity and the outdoor relative humidity
Q1＝ρ×(Hout-Hin) (III)
Wherein Q is1Is the fresh air energy consumption per unit volume, rho is a fixed value, TinIs the indoor dry bulb temperature, ToutIs the temperature of the outdoor dry bulb,
is the relative humidity in the room, and is,
is the outdoor relative humidity.
Preferably, calculating the maximum energy consumption that can be generated by sensible heat of the building lighting and heating equipment according to the rated power of each heating equipment in the building, includes:
calculating the maximum energy consumption which can be formed by the building illumination and the sensible heat of the heating equipment according to the rated power of each heating equipment in the building through a formula (IV)
Wherein Q is3Maximum energy consumption, P, which can be formed by sensible heat of building lighting and heating equipmentiIs the rated power of the ith heat-generating device, i is the ordinal number of the heat-generating device, and n is the total number of the heat-generating devices.
Preferably, the calculation of the per-capita fresh air volume, the number of people and the lighting and equipment use coefficient of the energy model for the existing building air conditioner according to the total energy consumption of the disturbance in the fresh air, the fresh air energy consumption in unit volume and the maximum energy consumption which can be formed by the sensible heat of the building lighting and heating equipment comprises the following steps:
calculating the per-capita fresh air volume, the number of people and the lighting and equipment use coefficient of the existing building air conditioning energy model by a formula (V) according to the total disturbance energy consumption, the fresh air energy consumption in unit volume and the maximum energy consumption which can be formed by sensible heat of the building lighting and heating equipment
QInternal disturbance of fresh air＝y×Q2+z×Q3+x×y×Q1(V)
Wherein Q isInternal disturbance of fresh airFor total energy consumption due to internal disturbance of fresh air, Q1Energy consumption of fresh air per unit volume, Q2Energy consumption, Q, for each person's heat dissipation per hour2Is constant, Q3The energy consumption is the maximum energy consumption which can be formed by sensible heat of building lighting and heating equipment, x is the per-person fresh air volume, y is the number of people, and z is the lighting and equipment use coefficient.
In a second aspect, the present invention further provides a method for predicting energy consumption of an existing building air conditioner, including:
acquiring outdoor dry bulb temperature, indoor dry bulb temperature, solar radiation quantity, indoor relative humidity, outdoor relative humidity of a building to be tested and rated power of each heating device in the building;
calculating the energy consumption of the enclosure structure according to the outdoor dry bulb temperature, the indoor dry bulb temperature and the solar radiation amount;
and calculating the energy consumption of the building air conditioner to be measured through the existing building air conditioner energy model constructed by the existing building air conditioner energy model construction method according to the energy consumption of the building enclosure structure, the outdoor dry bulb temperature, the indoor relative humidity, the outdoor relative humidity and the rated power of each heating device in the building.
Preferably, calculating the energy consumption of the building air conditioner to be measured through the existing building air conditioner energy model constructed by the existing building air conditioner energy model construction method according to the building enclosure energy consumption, the outdoor dry bulb temperature, the indoor relative humidity, the outdoor relative humidity and the rated power of each heating device in the building, and the method comprises the following steps:
calculating fresh air energy consumption per unit volume according to the outdoor dry bulb temperature, the indoor relative humidity and the outdoor relative humidity;
calculating the maximum energy consumption which can be formed by the building illumination and the sensible heat of the heating equipment according to the rated power of each heating equipment in the building;
and calculating the energy consumption of the air conditioner of the building to be tested through the energy model for the existing building air conditioner according to the energy consumption of the enclosure structure, the fresh air energy consumption in unit volume and the maximum energy consumption which can be formed by sensible heat of the building lighting and heating equipment.
Preferably, the energy model for the existing building air conditioner is
QBuilding (2)＝QEnclosure structure+QFresh air+QInternal disturbance
QInternal disturbance＝y×Q2+z×Q3
QFresh air＝x×y×Q1
Wherein Q isBuilding (2)For building air-conditioning energy consumption, QEnclosure structureEnergy consumption for building envelope, Q1Energy consumption of fresh air per unit volume, Q2Energy consumption, Q, for each person's heat dissipation per hour2Is constant, Q3The energy consumption is the maximum energy consumption which can be formed by sensible heat of building lighting and heating equipment, x is the per-person fresh air volume, y is the number of people, and z is the lighting and equipment use coefficient.
According to the technical scheme, the energy consumption is divided into the energy consumption of the enclosure structure and the total energy consumption of the internal disturbance of the fresh air (including the internal disturbance of illumination, equipment operation, personnel activity and the like and the energy consumption caused by the fresh air), the energy consumption of the enclosure structure is calculated based on the information (outdoor dry bulb temperature, indoor dry bulb temperature, solar radiation quantity) of the thermal physical property, geometric parameters and the like of the building enclosure structure which is relatively easy to obtain and relatively determined by data, the total energy consumption of the internal disturbance of the fresh air is calculated by using the energy consumption data of the cold and heat station (the energy consumption of the building air conditioner, namely the actual energy consumption of the building air conditioner), the energy consumption of the enclosure structure and the second preset relation, the total energy consumption of the internal disturbance of the fresh air is calculated, and the per-capita fresh air quantity, the outdoor dry bulb temperature, the indoor relative humidity, the outdoor relative humidity, the rated power, And finally determining an energy model for the existing building air conditioner according to the number of people and the lighting and equipment use coefficients. Different from the traditional prediction method, the energy model for the existing building air conditioner obtained by the method is based on the energy consumption (namely the actual energy consumption of the building air conditioner) data of the building air conditioner, and describes the actual thermal characteristics of the building, so that the air conditioner energy consumption data predicted by the energy model for the existing building air conditioner obtained by the method is closer to the actual energy consumption. The model identified by the method improves the model generality while the model is close to the actual degree. The obtained energy consumption model and the predicted air conditioner energy consumption have important reference significance for the operation regulation of the air conditioning system.
Drawings
Fig. 1 is a flowchart of an existing building air conditioner energy model construction method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for predicting energy consumption of an air conditioner of an existing building according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Different from newly-built buildings, existing buildings exist objectively, and although dynamic energy consumption requirements for air conditioners are influenced by factors with strong randomness, such as meteorological parameters, lighting and equipment operation, personnel activities, fresh air conditions and the like, the incidence relation between the factors and the energy consumption exists objectively and can be directly or indirectly obtained through means of measurement or calculation and the like. Therefore, for the air-conditioning energy model identification of the existing building, the 'actual working condition' corresponding to the building energy consumption data and the air-conditioning energy model of the building can be completely obtained according to the air-conditioning energy consumption data in the actual operation stage of the building and the individual condition of the building.
Based on this, the invention provides an energy model construction method for an existing building air conditioner as shown in fig. 1, which comprises the following steps:
s101, acquiring building air conditioner energy consumption, outdoor dry bulb temperature, indoor dry bulb temperature, solar radiation quantity, indoor relative humidity, outdoor relative humidity and rated power of each heating device in a building;
s102, calculating the energy consumption of the enclosure structure according to the outdoor dry bulb temperature, the indoor dry bulb temperature, the solar radiation quantity and a first preset relation; the first preset relation is the relation between the outdoor dry bulb temperature, the indoor dry bulb temperature, the solar radiation quantity and the energy consumption of the enclosure structure;
in a specific embodiment, the step S102 includes:
calculating the energy consumption of the enclosure structure according to the first preset relation and the formula (I)
u＝(QEnclosure structureΤOutdoor dry bulb temperatureQSolar radiation)T
The system comprises a building envelope structure, a plurality of nodes and a plurality of wall surface unit nodes, wherein C is a constant matrix and reflects the heat storage capacity of the nodes under the unit temperature change, and the nodes comprise indoor nodes and each wall surface unit node which are formed by dispersing the building envelope structure and the indoor space; t is a matrix formed by the temperatures of a plurality of nodes, and the temperature of an indoor node is the indoor dry bulb temperature; a is a constant matrix which represents the heat flow relationship generated between adjacent nodes due to the temperature difference;
a matrix composed of temperature versus time differentials for the plurality of nodes; b is a constant matrix which reflects the relation between the thermal disturbance and the temperature action condition of each node; qEnclosure structureEnergy consumption for the enclosure structure; gammaOutdoor dry bulb temperatureIs the outdoor dry bulb temperature; qSolar radiationIs the amount of solar radiation.
S103, calculating total energy consumption of fresh air internal disturbance according to the building air conditioner energy consumption, the building enclosure energy consumption and a second preset relation; the second preset relationship is the relationship among the building air conditioner energy consumption, the building enclosure energy consumption and the fresh air internal disturbance energy consumption;
in a specific embodiment, the step S103 includes:
calculating the total energy consumption of the internal disturbance of the fresh air through a formula (II) according to the building air conditioner energy consumption, the building envelope energy consumption and a second preset relation
QBuilding (2)＝QEnclosure structure+QInternal disturbance of fresh air(II)
Wherein Q isBuilding (2)For building air-conditioning energy consumption, QEnclosure structureEnergy consumption for building envelope, QInternal disturbance of fresh airThe energy consumption is the total internal disturbance energy consumption of fresh air.
S104, calculating the per-capita fresh air volume, the number of people and the lighting and equipment use coefficients of the existing building air conditioning energy model according to the total energy consumption of fresh air internal disturbance, the outdoor dry bulb temperature, the indoor relative humidity, the outdoor relative humidity, the rated power of each heating equipment in the building and a third preset relation; the third preset relation is the relation between the total energy consumption of fresh air internal disturbance and the outdoor dry bulb temperature, the indoor relative humidity, the outdoor relative humidity and the rated power of each heating device in the building;
and S105, determining an energy model for the existing building air conditioner according to the per-person fresh air volume, the number of people and the lighting and equipment use coefficients.
In the embodiment, energy consumption is divided into a plurality of parts of building enclosure energy consumption and fresh air internal disturbance total energy consumption (including internal disturbance caused by illumination, equipment operation, personnel activity and the like and energy consumption caused by fresh air), firstly, based on information (outdoor dry bulb temperature, indoor dry bulb temperature and solar radiation quantity) such as building enclosure thermophysical property, geometric parameters and the like which are relatively easily obtained and relatively determined by data, energy consumption of the building enclosure is calculated, then, energy consumption of the fresh air internal disturbance total energy consumption is calculated according to cold and hot station energy consumption data (building air conditioner energy consumption is namely the actual building air conditioner energy consumption), energy consumption of the building enclosure and a second preset relation, and then, according to the fresh air internal disturbance total energy consumption, the outdoor dry bulb temperature, the indoor relative humidity, the outdoor relative humidity, rated power of each heating equipment in the building and a third preset relation, the per-man fresh air quantity of the, And finally determining an energy model for the existing building air conditioner according to the number of people and the lighting and equipment use coefficients. Different from the traditional prediction method, the energy model for the existing building air conditioner obtained by the method is based on the energy consumption (namely the actual energy consumption of the building air conditioner) data of the building air conditioner, and the actual thermal characteristic of the building is described, so that the air conditioner energy consumption data predicted by the energy model for the existing building air conditioner obtained by the method of the embodiment is closer to the actual energy consumption. The model identified by the method improves the universality of the model while the model is close to the actual degree. The obtained energy consumption model and the predicted air conditioner energy consumption have important reference significance for the operation regulation of the air conditioning system.
As a preferred embodiment, the step S104 includes:
calculating fresh air energy consumption per unit volume according to the outdoor dry bulb temperature, the indoor relative humidity and the outdoor relative humidity;
as a preferred embodiment, calculating the fresh air energy consumption per unit volume according to the outdoor dry bulb temperature, the indoor relative humidity and the outdoor relative humidity comprises:
in one specific embodiment, the fresh air energy consumption per unit volume is calculated according to the outdoor dry bulb temperature, the indoor relative humidity and the outdoor relative humidity through a formula (III)
Q1＝ρ×(Hout-Hin) (III)
Wherein Q is1The fresh air energy consumption per unit volume is rho is a fixed value, and is the density of air, in this embodiment, the fixed value is 1.29kg/m3，TinIs the indoor dry bulb temperature, ToutIs the temperature of the outdoor dry bulb,
is the relative humidity in the room, and is,
is the outdoor relative humidity.
Calculating the maximum energy consumption which can be formed by the building illumination and the sensible heat of the heating equipment according to the rated power of each heating equipment in the building;
in one embodiment, calculating the maximum energy consumption that can be generated by sensible heat of the building lighting and heating equipment according to the rated power of each heating equipment in the building comprises:
calculating the maximum energy consumption which can be formed by the building illumination and the sensible heat of the heating equipment according to the rated power of each heating equipment in the building through a formula (IV)
Wherein Q is3Maximum energy consumption, P, which can be formed by sensible heat of building lighting and heating equipmentiIs the rated power of the ith heat-generating device, i is the ordinal number of the heat-generating device, and n is the total number of the heat-generating devices.
And calculating the per-capita fresh air volume, the number of people and the use coefficient of the lighting and equipment of the existing building air conditioner energy model according to the total disturbance energy consumption, the fresh air energy consumption in unit volume and the maximum energy consumption which can be formed by the sensible heat of the building lighting and heating equipment.
In a specific embodiment, calculating the per-person fresh air volume, the number of people and the lighting and equipment use coefficient of an energy model for an existing building air conditioner according to the total energy consumption of disturbance in the fresh air, the energy consumption of the fresh air in unit volume and the maximum energy consumption which can be formed by sensible heat of the building lighting and heating equipment comprises:
calculating the per-capita fresh air volume, the number of people and the lighting and equipment use coefficient of the existing building air conditioning energy model by a formula (V) according to the total disturbance energy consumption, the fresh air energy consumption in unit volume and the maximum energy consumption which can be formed by sensible heat of the building lighting and heating equipment
QInternal disturbance of fresh air＝y×Q2+z×Q3+x×y×Q1(V)
Wherein Q isInternal disturbance of fresh airFor total energy consumption due to internal disturbance of fresh air, Q1Energy consumption of fresh air per unit volume, Q2Energy consumption, Q, for each person's heat dissipation per hour2Is constant, Q3The energy consumption is the maximum energy consumption which can be formed by sensible heat of building lighting and heating equipment, x is the per-person fresh air volume, y is the number of people, and z is the lighting and equipment use coefficient.
Fig. 2 is a flowchart illustrating a method for predicting energy consumption of an air conditioner of an existing building according to an embodiment of the present invention.
As shown in fig. 2, the method for predicting the air conditioner energy consumption of the existing building includes:
s201, acquiring outdoor dry bulb temperature, indoor dry bulb temperature, solar radiation quantity, indoor relative humidity, outdoor relative humidity of a building to be tested and rated power of each heating device in the building;
s202, calculating the energy consumption of the enclosure structure according to the outdoor dry bulb temperature, the indoor dry bulb temperature and the solar radiation amount;
s203, calculating the energy consumption of the building air conditioner to be measured through the existing building air conditioner energy model constructed by the existing building air conditioner energy model construction method according to the energy consumption of the enclosure structure, the outdoor dry bulb temperature, the indoor relative humidity, the outdoor relative humidity and the rated power of each heating device in the building.
Based on the above discussion of the energy model construction method for the existing building air conditioner, it can be seen that the predicted air conditioning load is closer to the actual air conditioning load of the building by using the building air conditioner energy consumption obtained by the energy model construction method for the existing building air conditioner, and the method has important reference significance for energy conservation of large public buildings, especially for energy conservation of the existing large public buildings.
As a preferred embodiment, the step S203 includes:
calculating fresh air energy consumption per unit volume according to the outdoor dry bulb temperature, the indoor relative humidity and the outdoor relative humidity;
calculating the maximum energy consumption which can be formed by the building illumination and the sensible heat of the heating equipment according to the rated power of each heating equipment in the building;
and calculating the energy consumption of the air conditioner of the building to be tested through the energy model for the existing building air conditioner according to the energy consumption of the enclosure structure, the fresh air energy consumption in unit volume and the maximum energy consumption which can be formed by sensible heat of the building lighting and heating equipment.
In one embodiment, the energy model for the existing building air conditioner is
QBuilding (2)＝QEnclosure structure+QFresh air+QInternal disturbance
QInternal disturbance＝y×Q2+z×Q3
QFresh air＝x×y×Q1
Wherein Q isBuilding (2)For building air-conditioning energy consumption, QEnclosure structureEnergy consumption for building envelope, Q1Energy consumption of fresh air per unit volume, Q2Energy consumption, Q, for each person's heat dissipation per hour2Is constant, Q3The maximum energy consumption of sensible heat of building lighting and heating equipment can be formed, x is the per-capita fresh air volume, y is the number of people, and z is the lighting and equipment use coefficient.
Since the existing building air-conditioning energy consumption prediction method is an existing building air-conditioning energy model constructed by using the existing building air-conditioning energy model construction method, specific description of the method of the present embodiment may be referred to the description of the existing building air-conditioning energy model construction method section.
It should be noted that, in the respective components of the apparatus of the present invention, the components therein are logically divided according to the functions to be implemented, but the present invention is not limited thereto, and the respective components may be re-divided or combined as needed, for example, some components may be combined into a single component, or some components may be further decomposed into more sub-components. It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware.
The above embodiments are only suitable for illustrating the present invention and not limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (4)
1. An energy model construction method for an existing building air conditioner is characterized by comprising the following steps:
acquiring building air conditioner energy consumption, outdoor dry bulb temperature, indoor dry bulb temperature, solar radiation quantity, indoor relative humidity, outdoor relative humidity and rated power of each heating device in a building;
calculating the energy consumption of the enclosure structure according to the outdoor dry bulb temperature, the indoor dry bulb temperature, the solar radiation quantity and a first preset relation; the first preset relation is the relation between the outdoor dry bulb temperature, the indoor dry bulb temperature, the solar radiation quantity and the energy consumption of the enclosure structure;
calculating the total energy consumption of the fresh air internal disturbance according to the building air conditioner energy consumption, the building enclosure energy consumption and a second preset relation; the second preset relationship is the relationship among the building air conditioner energy consumption, the building enclosure energy consumption and the fresh air internal disturbance energy consumption;
calculating the per-person fresh air volume, the number of people and the lighting and equipment use coefficients of the existing building air conditioning energy model according to the total energy consumption of the fresh air internal disturbance, the outdoor dry bulb temperature, the indoor relative humidity, the outdoor relative humidity, the rated power of each heating equipment in the building and a third preset relation; the third preset relation is the relation between the total energy consumption of fresh air internal disturbance and the outdoor dry bulb temperature, the indoor relative humidity, the outdoor relative humidity and the rated power of each heating device in the building; the method comprises the following steps:
according to the outdoor dry bulb temperature, the indoor relative humidity and the outdoor relative humidity, calculating the fresh air energy consumption per unit volume by the following formula:
Q1＝ρ×(Hout-Hin)
wherein Q is1Is the fresh air energy consumption per unit volume, rho is a fixed value, TinIs the indoor dry bulb temperature, ToutIs the temperature of the outdoor dry bulb,
is the relative humidity in the room, and is,
is the outdoor relative humidity;
calculating the maximum energy consumption which can be formed by the building illumination and the sensible heat of the heating equipment according to the rated power of each heating equipment in the building;
according to the total energy consumption of disturbance in the fresh air, the energy consumption of the fresh air in unit volume and the maximum energy consumption which can be formed by sensible heat of the building lighting and heating equipment, the per-capita fresh air volume, the number of people and the lighting and equipment use coefficients of an energy model for the existing building air conditioner are calculated through the following formulas:
Qinternal disturbance of fresh air＝y×Q2+z×Q3+x×y×Q1
Wherein Q isInternal disturbance of fresh airFor total energy consumption due to internal disturbance of fresh air, Q1Energy consumption of fresh air per unit volume, Q2Energy consumption, Q, for heat dissipation per person per unit time2Is constant, Q3The energy consumption is the maximum energy consumption which can be formed by sensible heat of building lighting and heating equipment, x is the per-person fresh air volume, y is the number of people, and z is the lighting and equipment use coefficient;
determining an energy model for the existing building air conditioner according to the per-person fresh air volume, the number of people and the lighting and equipment use coefficients; wherein, the existing building air conditioner can the model be:
Qbuilding (2)＝QEnclosure structure+QFresh air+QInternal disturbance
QInternal disturbance＝y×Q2+z×Q3
QFresh air＝x×y×Q1
Wherein Q isBuilding (2)For building air-conditioning energy consumption, QEnclosure structureEnergy consumption for the building envelope.
2. The method of claim 1, wherein calculating the total energy consumption of the fresh air internal disturbance according to the building air conditioner energy consumption, the building envelope energy consumption and the second preset relationship comprises:
calculating the total energy consumption of the fresh air internal disturbance through the following formula:
Qbuilding (2)＝QEnclosure structure+QInternal disturbance of fresh air
Wherein Q isBuilding (2)For building air-conditioning energy consumption, QEnclosure structureEnergy consumption for building envelope, QInternal disturbance of fresh airThe energy consumption is the total internal disturbance energy consumption of fresh air.
3. The method of claim 1, wherein calculating the maximum energy consumption of sensible heat of building lighting and heating equipment according to the rated power of each heating equipment in the building comprises:
calculating the maximum energy consumption which can be formed by sensible heat of the building lighting and heating equipment according to the following formula:
wherein Q is3Maximum energy consumption, P, which can be formed by sensible heat of building lighting and heating equipmentiIs the rated power of the ith heat-generating device, i is the ordinal number of the heat-generating device, and n is the total number of the heat-generating devices.
4. The method for predicting the air conditioner energy consumption of the existing building is characterized by comprising the following steps:
acquiring outdoor dry bulb temperature, indoor dry bulb temperature, solar radiation quantity, indoor relative humidity, outdoor relative humidity of a building to be tested and rated power of each heating device in the building;
calculating the energy consumption of the enclosure structure according to the outdoor dry bulb temperature, the indoor dry bulb temperature and the solar radiation amount;
calculating the energy consumption of the air conditioner of the building to be tested through the energy model for the existing building, which is constructed by the energy model for the air conditioner of the existing building according to the energy consumption of the enclosure structure, the temperature of outdoor dry balls, the temperature of indoor dry balls, the indoor relative humidity, the outdoor relative humidity and the rated power of each heating device in the building, which is constructed by the energy model construction method for the air conditioner of the existing building according to any one of claims 1 to 3, and comprises the following steps:
calculating fresh air energy consumption per unit volume according to the outdoor dry bulb temperature, the indoor relative humidity and the outdoor relative humidity;
calculating the maximum energy consumption which can be formed by the building illumination and the sensible heat of the heating equipment according to the rated power of each heating equipment in the building;
and calculating the energy consumption of the air conditioner of the building to be tested through the energy model for the existing building air conditioner according to the energy consumption of the enclosure structure, the fresh air energy consumption in unit volume and the maximum energy consumption which can be formed by sensible heat of the building lighting and heating equipment.
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| CN110953680A (en) * | 2019-12-09 | 2020-04-03 | 珠海格力电器股份有限公司 | Air conditioner control method and system |
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