Indoor heat, oxygen and humidity collaborative supply method and system for plateau area based on fresh air system

Abstract

The invention relates to the field of building energy saving, in particular to a plateau area indoor heat, oxygen and humidity collaborative supply method and system based on a fresh air system, and the collaborative supply method comprises the steps that S1, the local altitude, outdoor meteorological parameters, building parameters and oxygen concentration requirements of a plateau area are determined; s2, calculating an oxygen supply flow design value of a room oxygen supply system at the local altitude; s3, the coupling effect of oxygen supply is considered, and the fresh air flow is corrected and calculated according to the oxygen supply flow; s4, the influence of a fresh air system and an oxygen supply system is considered, and a humidification amount design value is calculated; and S5, the influence of the altitude on heat load calculation is corrected, the influence of a fresh air system, a humidification system and an oxygen supply system on a heating system is considered, and the indoor heating air supply amount is calculated. A simple and scientific system capacity matching and correction design method is formed, the problems of simple integration and capacity imbalance of equipment in the prior art are solved, and the energy consumption of the system is remarkably reduced while the high quality of the indoor environment is ensured.

Description

Technical Field

[0001] This invention relates to the field of building energy conservation, and in particular to a method and system for the coordinated supply of heat, oxygen and humidity in indoor spaces in high-altitude areas based on a fresh air system. Background Technology

[0002] Buildings in high-altitude areas face harsh climatic conditions such as cold, strong winds, sandstorms, and thin, dry air, resulting in significant demands for heating cycles, oxygen replenishment, and humidification. Existing technologies often employ simple integration of heat, oxygen, and humidity equipment, lacking a systematic, coupled design that fails to synergistically meet the complex needs of buildings. Especially when introducing fresh air, neglecting the interplay between altitude, heat, oxygen, humidity, and fresh air can easily lead to insufficient or excessive supply, resulting in energy waste and a decline in indoor environmental quality. Furthermore, while using environmentally friendly building materials, the fresh air system primarily functions to regulate indoor CO2 concentration. As altitude increases, the mass of CO2 decreases for the same volume, and the oxygen supply process further dilutes CO2, reducing the need for fresh air. However, changes in fresh air volume directly affect the system's heating load. Current technologies have not yet solved the capacity matching problem between fresh air and multiple factors such as heat, oxygen, and humidity in high-altitude environments, hindering building energy conservation and indoor environmental control. Therefore, there is an urgent need for a highly efficient coupled air conditioning system that can comprehensively address the needs of heat, oxygen, humidity, and fresh air to achieve low-energy consumption and high-quality environmental control in high-altitude buildings. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a method and system for the coordinated supply of heat, oxygen and humidity in indoor high-altitude areas based on a fresh air system. The high-altitude areas mentioned in this invention refer to areas with an altitude of more than 2000m.

[0004] In a first aspect, the present invention provides a method for coordinated indoor heat, oxygen, and humidity supply in high-altitude areas based on a fresh air system, characterized in that a heat-oxygen-humidity-fresh air coupled system is adopted, including an air conditioning system, an oxygen supply system, a humidification system, and a fresh air system, and the coordinated supply method includes the following steps:

[0005] S1: Determine the local altitude, outdoor meteorological parameters, building parameters, and oxygen concentration requirements for the plateau region. C 0; S2: Calculate the design value of the oxygen supply flow rate for the room oxygen supply system at the local altitude.

[0006] In the formula: V z This represents the design value of oxygen supply flow rate, in meters (m³). 3 / h; p r This indicates the number of people involved in the room design.V ren This indicates the oxygen consumption per person in the room, in units of... m 3 / ( h·person) ; V hs This indicates the flow rate (m) of mixed oxygen delivered by the oxygen recovery equipment. 3 / h; C 0 indicates the required oxygen concentration, expressed in %; ω hs This indicates the oxygen concentration output from the oxygen recovery and treatment equipment, expressed in % (%). V xfs This represents the indoor fresh air design value, in cubic meters (m³). 3 / h; ω sw This indicates the oxygen concentration in outdoor air, expressed in % %. ω z This indicates the oxygen concentration output from the oxygen generator, expressed in % (%). S3: Considering the coupling effect of oxygen supply, the fresh air flow rate is corrected and calculated based on the oxygen supply flow rate:

[0007] In the formula: This indicates the correction value for fresh air supply flow rate, in meters (m³). 3 / h; S4: Considering the impact of the fresh air system and oxygen supply system, calculate the design value of humidification:

[0008] In the formula: H s This is the design value for humidification rate, in ml / h. ρ n Indoor air density at local atmospheric pressure, in kg / m³ 3 , The indoor air humidity at the previous moment is expressed in g / kg. ρ w Outdoor air density at local atmospheric pressure, in kg / m³ 3 ; d 0 represents the local outdoor air humidity, expressed in g / kg; ρ water The density of water is expressed in units of 1000g. g / ml ; S5: Corrects the impact of altitude on heat load calculation, considers the impact of fresh air system, humidification system, and oxygen supply system on heating system, and calculates indoor heating air volume:

[0009] In the formula: This indicates the indoor heating air volume, in units of... m 3 / h ; The altitude correction factor for heat load is dimensionless. Q h The typical day winter heat load for a typical room is expressed in kW. c psa This represents the specific heat capacity of saturated water vapor at the local atmospheric pressure, expressed in kJ / (kg·°C). ΔT W The temperature rise of the humidified air in the heating and humidification system is expressed in °C. This indicates the specific heat capacity of indoor air, expressed in kJ / (kg·°C). ΔT o2 The temperature rise for heating oxygen is expressed in °C. T s Calculate the supply air temperature for the air conditioning system, in °C; T n Calculate the local indoor air temperature, in °C.

[0010] Preferably, in S2, the oxygen mass conservation equation is:

[0011] In the formula, Indicates time, in units of h ; V xf This indicates the fresh air supply flow rate, measured in meters (m³). 3 / h; V p This indicates the airflow rate of air discharged from indoors that has not been recovered for oxygen, expressed in meters (m³). 3 / h; V r This indicates the flow rate of the room return air to the oxygen recovery equipment, in meters per second (m³). 3 / h; ω p The oxygen concentration in the exhaust air is expressed as %; A represents the area of ​​a typical room, in square meters. 2 ; l r Typical room height, in meters; ω sn0 , ω sn These represent the initial indoor oxygen concentration and the indoor oxygen concentration after a period of oxygen supply, respectively, in units of .

[0012] Preferably, in S2, The percentage of recovered oxygen in the exhaust air volume is:α , , Constant room air pressure , The airflow entering the room after oxygen recovery is: , Indoor oxygen content is expressed as: .

[0013] Preferably, in S4, The dynamic equilibrium equation for room water vapor content is:

[0014] In the formula, m This indicates the mass of water vapor in the indoor air at the current moment, expressed in grams (g). m’ This represents the mass of water vapor in the indoor air at the previous moment, expressed in grams. H Humidification rate, unit is ml / h; τ Time, in hours; V xf This indicates the fresh air supply flow rate, measured in meters (m³). 3 / h; ρ w The outdoor air density under local atmospheric pressure is expressed in kg / m³. d 0 represents the local outdoor air humidity, expressed in g / kg; The humidity level of the indoor air at the previous moment is expressed in g / kg.

[0015] Preferably, in S5, The actual heat load is linearly related to the indoor-outdoor temperature difference; therefore, a correction is made for the actual heat load.

[0016] In the formula: T w Calculate the local outdoor air temperature, in °C; h altitude κ represents the local altitude in meters (m); κ represents the decrease in outdoor temperature for every 100m increase in altitude in degrees Celsius (°C).

[0017] In a second aspect, the present invention provides a method for coordinated control of indoor heat, oxygen, and humidity in plateau areas based on a fresh air system. This method uses any of the aforementioned methods for coordinated indoor heat, oxygen, and humidity supply in plateau areas based on a fresh air system to determine the design value of oxygen supply flow rate, the correction value of fresh air supply flow rate, the design value of humidification, and the indoor heating air supply volume. The method further includes the following steps: S6: Set oxygen concentration requirements C 0. Humidity requirements Room temperature requirements T0, Real-time monitoring of indoor oxygen concentration ω cs Indoor relative humidity Room temperature T cs ; S7: Control the oxygen supply system's on / off state based on the monitored indoor oxygen concentration. like ω cs > C 0, the oxygen supply system is not running; otherwise, the oxygen supply system remains running. The humidification system is turned on and off based on the indoor relative humidity: like > If the humidification system fails to start, it will not operate; otherwise, it will start. The heating system is controlled to turn on and off based on monitored room temperature. If the heating system was detected to be running at the previous moment... T cs > T When the time is 0+M, the heating system is turned off; otherwise, the heating system is turned on; if the heating system was detected to be off in the previous moment, T cs < T When the temperature is 0, the heating system starts; otherwise, the heating system shuts down. M represents the set temperature range value, in °C.

[0018] Preferably, seven control modes are adopted: Mode 1 is suitable for the heating season and includes functions such as oxygen supply, humidification, and heating; Mode 2 is suitable for the heating season and includes functions such as oxygen supply and heating. Mode 3 is suitable for the heating season and includes functions such as humidification and heating; Mode 4 is suitable for the transitional season and includes functions such as oxygen supply and humidification; Mode 5 is suitable for standalone control and includes oxygen supply functionality; Mode 6 is suitable for individual control and includes humidification functions; Mode 7 is suitable for individual control and includes functions such as heating. The heating function includes a built-in fresh air function.

[0019] Preferably, in Mode 2, the heat-oxygen-humidity coupling system assigns a value to the indoor relative humidity, making In this mode, the humidification system remains off; in mode 3, the heat-oxygen-humidity coupling system assigns a value to the indoor oxygen concentration. ω cs = C If the value is 0, the oxygen supply system remains closed; in Mode 4, the heat-oxygen-humidity coupling system assigns a value to the room temperature, making... Tcs = T If 0+M, the heating system will remain off.

[0020] In a third aspect, the present invention provides an indoor heat, oxygen, and humidity co-supply system for plateau regions based on a fresh air system, employing any of the aforementioned indoor heat, oxygen, and humidity co-supply methods for plateau regions based on a fresh air system.

[0021] In a fourth aspect, the present invention provides a computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to perform any of the above-described methods for coordinated supply of heat, oxygen, and humidity in indoor high-altitude areas based on a fresh air system.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a method and system for the coordinated supply of heat, oxygen, and humidity in high-altitude indoor environments based on a fresh air system. Through systematic integrated design, it achieves an integrated and coordinated supply of heating, oxygen, humidification, and fresh air functions. It comprehensively considers the fundamental impact of high-altitude environments on heat, humidity, and oxygen demands, and deeply analyzes the interaction mechanisms between various subsystems: active oxygen supply reduces reliance on fresh air to dilute pollution, thereby reducing the burden on fresh air and its associated heat load; humidification demand is dynamically matched based on the corrected fresh air volume; finally, based on correcting the impact of altitude on heat load calculations, the coupling effect of oxygen supply, fresh air, and humidification on the air supply state is comprehensively considered to optimize the calculation of heating air supply volume. This method gradually decouples multiple complex coupling factors in the special environment of high altitudes, forming a simple and scientific system capacity matching and correction design method. It fundamentally solves the problems of simple equipment integration and capacity mismatch in existing technologies. Combined with oxygen recovery technology and heat recovery technology, it further reduces system energy consumption, achieving a significant reduction in system energy consumption while ensuring a high-quality indoor environment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the heat-oxygen-humidity-fresh air coupling system described in this invention.

[0024] Figure 2 This is a schematic diagram of the process for the coordinated supply of heat, oxygen, and humidity in indoor high-altitude areas based on a fresh air system, as described in this invention.

[0025] Figure 3 This is a flowchart illustrating the indoor heat, oxygen, and humidity synergistic control method based on a fresh air system in plateau areas as described in this invention.

[0026] Figure 4 This is a schematic diagram illustrating the hourly oxygen flow rate variation in the room as described in Embodiment 5 of the present invention.

[0027] Figure 5This is a schematic diagram illustrating the hourly change of indoor oxygen concentration as described in Embodiment 5 of the present invention.

[0028] Figure 6 This is a schematic diagram illustrating the hourly changes in oxygen concentration in the oxygen recovery and oxygen-free recovery chambers under the same oxygen production capacity, as described in Embodiment 5 of the present invention. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0030] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer," etc., used in the description of specific embodiments of the present invention to indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0031] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present invention.

[0032] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0033] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0034] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to connection methods commonly used in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0035] Example 1 like Figure 1 As shown, a heat-oxygen-humidity-fresh air coupled system includes an air conditioning system, an oxygen supply system, a humidification system, and a fresh air system. The air conditioning system may include, but is not limited to, a heating function, and may also have a cooling function (similar to heating, so further details are omitted). The oxygen supply system, humidification system, and fresh air system are coupled to the heat-oxygen-humidity-fresh air coupled system according to a coordinated supply method.

[0036] The described heat-oxygen-humidity-fresh air coupling system can meet the indoor heat, oxygen, humidity, and fresh air requirements of a building. It considers the comprehensive impact of local altitude on the supply of heat, humidity, and oxygen; it considers that the oxygen supply system reduces the dilution burden of indoor pollutants on the fresh air system, thereby reducing the fresh air volume and heat load; it considers the impact of the fresh air system on the humidification system; and it considers the comprehensive impact of oxygen supply, fresh air, and humidification on variable heating and air supply. In other words, this invention comprehensively considers the influence of coupling factors such as altitude, heat, oxygen, humidity, and fresh air on the system's heating, oxygen supply, humidification, and fresh air supply.

[0037] like Figure 2 As shown, a method for coordinated indoor heat, oxygen, and humidity supply in plateau areas based on a fresh air system, employing the aforementioned heat-oxygen-humidity-fresh air coupling system, includes the following steps: S1: Determine the local altitude, outdoor meteorological parameters, building parameters, and oxygen concentration requirements for the plateau region. C 0.

[0038] S2: Calculate the design value of oxygen supply flow rate for the room oxygen supply system at the local altitude.

[0039] Assuming constant room pressure, the inflow rate of air into the room is equal to the outflow rate of air from the room. Oxygen mass conservation equation:

[0040] In the formula, V z This represents the design value of oxygen supply flow rate, in meters (m³). 3 / h; ω z This indicates the oxygen concentration output from the oxygen generator, expressed in % (%). Indicates time, in units of h ; V hs This indicates the flow rate (m) of mixed oxygen delivered by the oxygen recovery equipment. 3 / h; ω hs This indicates the oxygen concentration output from the oxygen recovery and treatment equipment, expressed in % (%). V xf This indicates the fresh air supply flow rate, measured in meters (m³). 3 / h; ω sw This indicates the oxygen concentration in outdoor air, expressed in % %. V ren This indicates the oxygen consumption per person in the room, in units of... m 3 / ( h·person) ; V p This indicates the airflow rate of air discharged from indoors that has not been recovered for oxygen, expressed in meters (m³). 3 / h; ω p This indicates the oxygen concentration in the exhaust air from the room, expressed in % . V r This indicates the flow rate of the room return air to the oxygen recovery equipment, in meters per second (m³). 3 / h; A is the typical room area, in m². 2 ; l r Typical room height, in meters; ω sn0 , ω sn These represent the initial indoor oxygen concentration and the indoor oxygen concentration after a period of oxygen supply, respectively, in units of .

[0041] When interior decoration materials meet green and environmentally friendly requirements, the main function of a fresh air system to control indoor pollutant concentrations is to reduce indoor CO2 concentration. Similarly, the oxygen supplied by oxygen generators is obtained by filtering outdoor air before introducing it into the room, thus reducing the burden on fresh air systems. The indoor fresh air design value... V xfs = Vxf + V z , V xfs This represents the indoor fresh air design value, in cubic meters (m³). 3 / h.

[0042] Let the proportion of recovered oxygen in the exhaust air volume be . α , The room air pressure is constant. Therefore, the airflow into the room after oxygen recovery is: Simplifying, we get .

[0043] Indoor oxygen content is expressed as:

[0044] In the formula: p r This indicates the number of people involved in the room design.

[0045] Oxygen concentration in indoor exhaust air ω p The indoor oxygen concentration increases with the duration of oxygen supply, representing the concentration at the end of the previous time step. ω sn The oxygen concentration of the indoor air to be exhausted in the next moment ω p Iterative calculations show that after a period of oxygen supply, the indoor oxygen concentration tends to stabilize. Let the stable indoor oxygen concentration be... ω sn_max ,satisfy ω ox_max = C 0, where C 0 indicates the oxygen concentration requirement for the corresponding altitude in the standard, expressed as a percentage. Under stable conditions, the initial indoor oxygen concentration is equal to the oxygen concentration in the exhaust gas. ω sn0 = ω p = C 0, the mass balance expression is:

[0046] Therefore, the capacity of the oxygen supply system V· z The matching formula is: .

[0047] S3: Considering the coupling effect of oxygen supply, the fresh air flow rate is corrected and calculated based on the oxygen supply flow rate.

[0048] If the building requires fresh air, the heat-oxygen-humidity-fresh air coupled system, after calculating the oxygen supply system capacity, adjusts the fresh air requirement based on the oxygen production capacity of the oxygen supply system. The designed fresh air volume according to the specifications is... V xfs When calculating the capacity of the oxygen supply system V xf = V xfs The oxygen supply system can be considered as fresh air after processing outdoor air, and when introduced into the room, it also helps to reduce indoor pollutants.

[0049] therefore, In the formula: This indicates the correction value for fresh air supply flow rate, in meters (m³). 3 / h.

[0050] S4: Considering the impact of the fresh air system and oxygen supply system, calculate the design value of humidification.

[0051] The heat-oxygen-humidity-fresh air coupled system comprehensively considers the impact of oxygen supply and fresh air volume on the room's thermal and humidity environment. The initial mass of indoor water vapor before humidification is... ,in, ρ w This indicates the outdoor air density under local atmospheric pressure, expressed in kg / m³. 3 d0 represents the local outdoor air humidity, in g / kg; A represents the room area, in m². 2 ; l r This indicates the room height, in meters (m).

[0052] The dynamic equilibrium equation for room water vapor content is:

[0053] In the formula, m This indicates the mass of water vapor in the indoor air at the current moment, expressed in grams (g). m’ This represents the mass of water vapor in the indoor air at the previous moment, expressed in grams. H Humidification rate, unit is ml / h; τ Time, in hours; The humidity level of the indoor air at the previous moment is expressed in g / kg.

[0054] As outdoor air flows in and indoor air flows out, when the room temperature is maintained at the heating temperature, the indoor relative humidity will reach a state of equilibrium. At this time, m = m’ , The indoor relative humidity and moisture content reach their maximum values. Let the relative humidity in equilibrium state be the design value. The moisture content of saturated humid air at heating temperature is...d sa The design value for relative humidity is the relative humidity at equilibrium: .

[0055] Therefore, the capacity matching calculation for the humidification system is as follows:

[0056] In the formula: H s This is the design value for humidification capacity, in units of... ml / h ; ρ n Indoor air density at local atmospheric pressure, in kg / m³ 3 , The indoor air humidity level at the previous moment, in units of... g / kg ; ρ water The density of water is expressed in units of 1000g. g / ml .

[0057] S5: Correct the impact of altitude on heat load calculation, consider the impact of fresh air system, humidification system and oxygen supply system on heating system, and calculate indoor heating air volume.

[0058] First, the real-time heat load of a typical room on a typical winter day is corrected. The real-time heat load demand on a typical winter day should include heat transfer and infiltration from the building envelope. Simplified analysis shows that the actual heat load should be linearly related to the indoor-outdoor temperature difference. Therefore, the actual heat load is corrected as follows:

[0059] In the formula: T w Calculate the local outdoor air temperature, in °C; h altitude This represents the local altitude, in units of... m κ represents the decrease in outdoor temperature for every 100m increase in altitude, expressed in °C.

[0060]

[0061] In the formula: This indicates the indoor heating air volume, in units of... m 3 / h ; The altitude correction factor for heat load is dimensionless. Q h The typical day winter heat load for a typical room is expressed in kW. c psaThis represents the specific heat capacity of saturated water vapor at the local atmospheric pressure, expressed in kJ / (kg·°C). ΔT W The temperature rise of the humidified air in the heating and humidification system is expressed in °C. c pn This indicates the specific heat capacity of indoor air, expressed in kJ / (kg·°C). ΔT o2 The temperature rise for heating oxygen is expressed in °C. T s Calculate the supply air temperature for the air conditioning system, in °C; T n Calculate the local indoor air temperature, in °C.

[0062] Example 2 A method for coordinated control of indoor heat, oxygen, and humidity in plateau areas based on a fresh air system, comprising determining the design value of oxygen supply flow rate, the correction value of fresh air supply flow rate, the design value of humidification, and the indoor heating supply air volume using the coordinated supply method of indoor heat, oxygen, and humidity in plateau areas based on a fresh air system as described in any of Examples 1, and further comprising the following steps: S6: Set oxygen concentration requirements C 0. Humidity requirements Room temperature requirements T 0, Real-time monitoring of indoor oxygen concentration ω cs Indoor relative humidity Room temperature T cs ; S7: Control the oxygen supply system's on / off state based on the monitored indoor oxygen concentration. like ω cs > C 0, the oxygen supply system is not running; otherwise, the oxygen supply system remains running. The humidification system is turned on and off based on the indoor relative humidity: like > If the humidification system fails to start, it will not operate; otherwise, it will start. The heating system is controlled to turn on and off based on monitored room temperature. If the heating system was detected to be running at the previous moment... T cs > T When the time is 0+M, the heating system is turned off; otherwise, the heating system is turned on; if the heating system was detected to be off in the previous moment, T cs < T When the temperature is 0, the heating system starts; otherwise, the heating system shuts down. M represents the set temperature range value, in °C.

[0063] Specifically, seven control modes can be used: Mode 1 is suitable for the heating season and includes functions such as oxygen supply, humidification, and heating; Mode 2 is suitable for the heating season and includes functions such as oxygen supply and heating. Mode 3 is suitable for the heating season and includes functions such as humidification and heating; Mode 4 is suitable for the transitional season and includes functions such as oxygen supply and humidification; Mode 5 is suitable for standalone control and includes oxygen supply functionality; Mode 6 is suitable for individual control and includes humidification functions; Mode 7 is suitable for individual control and includes functions such as heating. The heating function includes a built-in fresh air function.

[0064] In Mode 2, the heat-oxygen-humidity coupling system assigns a value to the indoor relative humidity, making The humidification system will remain off at all times. In Mode 3, the heat-oxygen-humidity coupled system assigns a value to the indoor oxygen concentration. ω cs = C If the value is 0, the oxygen supply system remains closed; in Mode 4, the heat-oxygen-humidity coupling system assigns a value to the room temperature, making... T cs = T If 0+M, the heating system will remain off.

[0065] Modes 5-7 are separate supply modes for oxygen, humidification, and heating (fresh air), suitable for individuals with independent room requirements. In this mode, the system does not consider a coupled supply mechanism for heat, oxygen, and humidity.

[0066] Select Mode 5: Mode 5 only supplies oxygen to the room; there is no fresh air or oxygen recovery. ω cs ≤ C 0, the heating system remains running; if ω cs > C 0, Heating system shut down.

[0067] Select Mode 6: Within a certain time step, if ≤ The humidification system remains running; if > The humidification system is turned off.

[0068] Select mode 7: Within a certain time step, if T cs ≤T0, the heating system remains running; if T cs>T0, heating system shut down.

[0069] Example 3 A combined heat, oxygen, and humidity supply system for indoor spaces in high-altitude areas based on a fresh air system, employing any of the aforementioned combined heat, oxygen, and humidity supply methods for indoor spaces in high-altitude areas based on a fresh air system.

[0070] Example 4 A computer-readable storage medium includes a stored computer program, wherein, when the computer program is executed, it controls the device on which the computer-readable storage medium is located to perform any of the aforementioned indoor heat, oxygen, and humidity co-supply methods based on fresh air systems in high-altitude areas.

[0071] Example 5 This embodiment uses an office building in Lhasa as an example, focusing on a 20m... 2 The room is supplied with a coupled system of heat, humidity, oxygen, and fresh air. The local altitude is 3500m, and the atmospheric pressure is 65.29kPa. The office is designed for two people. According to the "Design Standard for Civil Oxygen Supply Engineering in Tibet Autonomous Region" DBJ 540004-2018, the room's thermal oxygen consumption per person is 0.34 NL / min (at a local atmospheric pressure of 0.0336m). 3 / h). Of course, this invention is not limited to offices, but can also be used in medium and large public buildings and residential buildings that require fresh air.

[0072] This embodiment uses pressure swing adsorption (PSA) for oxygen supply. However, the oxygen supply method of the oxygen system of this invention includes, but is not limited to, PSA oxygen supply, and may also be VPSA vacuum pressure swing adsorption, membrane separation oxygen supply, etc. For the humidification system, the humidification method of this embodiment includes, but is not limited to, ultrasonic humidification, cold evaporation humidification, and hot evaporation humidification.

[0073] A method for coordinated indoor heat, oxygen, and humidity supply in plateau areas based on a fresh air system includes the following steps: S1: Determine the local altitude, outdoor meteorological parameters, building parameters, and oxygen concentration requirements for the plateau region. C 0. The parameters for a typical room are shown in Table 1.

[0074]

[0075] S2: Calculate the design value of oxygen supply flow rate for the room oxygen supply system at the local altitude.

[0076] According to GB / T 35414-2017, "Requirements for Indoor Space Diffuse Oxygen Supply (Oxygen Regulation) in Plateau Areas," this embodiment uses a Class A concentration at an altitude of 3500m. C 0 represents 24.7%.

[0077] In a heat-humidity-oxygen coupling system, the room air intake volume is the fresh air design value. V xfs Combined with oxygen recovery and indoor air volume V hs The sum of the output air volume and the exhaust air volume. V p With return air volume V r The sum. The percentage of recovered oxygen in the exhaust air volume. α =10%; when the indoor oxygen concentration is stable ( ω sn0 = ω p = C 0 = 24.7%.

[0078] The airflow into the room during oxygen recovery is: =1.9115 m 3 / h Calculate the design value of the oxygen supply flow rate for the outdoor oxygen supply system based on the mass balance equation: m 3 / h In this embodiment, the oxygen-generating air volume of the outdoor oxygen supply system is set at 1.8 m³. 3 / h (30L / min). The hourly oxygen flow rate in this embodiment is as follows: Figure 4 As shown.

[0079] S3: Considering the coupling effect of oxygen supply, the fresh air flow rate is corrected and calculated based on the oxygen supply flow rate.

[0080] In this embodiment, the oxygen introduced into the room is also filtered fresh outdoor air, which also helps reduce indoor pollutants. Therefore, the fresh air volume of the coupled system is... =58.2 m 3 / h (970L / min).

[0081] S4: Considering the impact of the fresh air system and oxygen supply system, calculate the design value of humidification.

[0082] According to the requirements of the "Code for Design of Heating, Ventilation and Air Conditioning of Civil Buildings" GB50736-2012, the required humidification rate is 50%. = =50%.

[0083] The initial moisture content and relative humidity of the room were: d0 = 0.936 g / kg. =26.0%; At the indoor design temperature, the initial moisture content of the room is 5.275 g / kg, the relative humidity is 26.0%, and the moisture content of saturated humid air is d. sa = 20.3 g / kg, the initial water vapor mass m0 in the room is =244.45g. Heating temperature The corresponding moisture content is =10.15g / kg. The calculated minimum design humidification capacity is: ml / h The humidification capacity should be designed to be greater than 420 ml / h. This example uses a humidification system with a capacity of 450 ml / h, and the indoor oxygen concentration changes hourly. Figure 5 As shown.

[0084] S5: Correct the impact of altitude on heat load calculation, consider the impact of fresh air system, humidification system and oxygen supply system on heating system, and calculate indoor heating air volume.

[0085] This embodiment provides a correction calculation method for the air supply volume of an air conditioning system. First, the altitude correction factor for the heat load is calculated. =1.1282.

[0086] Then, the capacity of the heating and ventilation system is corrected and calculated: =1048.76m 3 / h In this embodiment, the air supply volume under the heating correction method is 1050m³. 3 / h. And for the uncorrected airflow rate... =924 m 3 / h, the revised version is significantly more suitable for high-altitude environments.

[0087] This embodiment also provides a method for coordinated control of indoor heat, oxygen, and humidity in plateau areas based on a fresh air system. The method uses any of the aforementioned methods to determine the design value of oxygen supply flow rate, the correction value of fresh air supply flow rate, the design value of humidification capacity, and the indoor heating air supply volume. The method further includes the following steps: S6: Set oxygen concentration requirements C 0. Humidity requirements Room temperature requirements T 0, Real-time monitoring of indoor oxygen concentration ω cs Indoor relative humidity Room temperature T cs ; S7: The operation control methods for different modes are as follows: Mode 1 First, control is based on the monitored oxygen concentration signal: if ω cs > 24.7% If the oxygen supply system is not running, the fresh air volume will be supplied according to the design value; otherwise, if the oxygen supply system is started, the fresh air volume will be supplied according to the correction value.

[0088] Next, control is implemented based on the monitored indoor relative humidity signal: If > 50% If the humidification system fails to start, it will not operate; otherwise, it will start.

[0089] Finally, real-time monitoring of room temperature is used to control the heating system, ensuring the system heats up to the desired temperature. 22℃ (When M is 4℃) stop heating, and let the room temperature drop to 18℃ Heating will begin at the following time. If the heating system was detected to be running at the previous time, T cs > 22 ℃ When the heating system is off, it shuts down; otherwise, it starts. If the heating system was detected to be off in the previous moment, T cs < 18 ℃ The heating system starts when the temperature is high; otherwise, it shuts off. This ensures the room temperature is maintained at […]. 18 , 22 The heating effect in the designated area. The fresh air system starts and stops simultaneously with the heating system.

[0090] Mode 2 The heat-oxygen-humidity coupling system assigns a value to the indoor relative humidity test signal, making = 50% In this case, the humidification system will remain off.

[0091] First, control is based on the monitored oxygen concentration signal: if ω cs > 24.7% If the oxygen supply system is not running, the fresh air volume will be supplied according to the design value; otherwise, if the oxygen supply system is started, the fresh air volume will be supplied according to the correction value.

[0092] Next, order = 50% Keep it closed.

[0093] Finally, the heating system is controlled by real-time monitoring of room temperature, ensuring that heating stops when the room temperature reaches T0+M and resumes when the room temperature drops below T0. If the heating system was detected as being running at a previous time, the system will be activated accordingly. T cs When the temperature exceeds 22℃, the heating system shuts off; otherwise, the heating system starts. If the heating system was detected to be off at the previous moment,T cs The heating system starts when the temperature is below 18℃; otherwise, it shuts down. This ensures that the room temperature is maintained within the range of [18, 22] for optimal heating. The fresh air system starts and stops simultaneously with the heating system.

[0094] Mode 3 The heat-oxygen-humidity coupling system assigns values ​​to the indoor oxygen concentration monitoring signal. ω cs = 24.7% In this case, the oxygen supply system remains closed, and its control method is as follows: First of all, let ω cs = 24.7% The oxygen supply system remains shut off.

[0095] Next, control is implemented based on the monitored indoor relative humidity signal: If > 50% If the humidification system fails to start, it will not operate; otherwise, it will start.

[0096] Finally, real-time monitoring of room temperature is used to control the heating system, ensuring the system heats up to the desired temperature. 22℃ Stop heating when the room temperature drops to [temperature value missing]. 18℃ Heating will begin at the following time. If the heating system was detected to be running at the previous time, T cs > 22℃ When the heating system is off, it shuts down; otherwise, it starts. If the heating system was detected to be off in the previous moment, T cs < 18℃ The heating system starts when the temperature is high; otherwise, it shuts off. This ensures the room temperature is maintained at […]. 18 , 22 The heating effect in the designated area. The fresh air system starts and stops simultaneously with the heating system.

[0097] Mode 4 Mode 4 is for the transitional season; the heat-oxygen-humidity coupling system is used only for oxygen supply and humidification. Assign a value to the room temperature test signal, let... T cs = 22℃ Heating should remain off.

[0098] Mode 5-Mode 7 Modes 5-7 are separate supply modes for oxygen, humidification, and heating. In these modes, the system control methods include: Select Mode 5: If ω cs ≤ 24.7% The oxygen supply system remains running; if ω cs > 24.7%The heating system is shut down.

[0099] Select Mode 6: If ≤ 50% The humidification system remains running; if > 50% The humidification system is turned off.

[0100] Select Mode 7: If T cs ≤ 18℃ The heating system remains running; if T cs > 18℃ The heating system is shut down.

[0101] The coupling system of this invention can utilize fresh air from the oxygen supply system to reduce the burden on the fresh air supply. While meeting indoor oxygen demand, the coupling system with oxygen recovery reduces the fresh air burden by 3.0%, and the coupling system without oxygen recovery reduces the fresh air burden by 6.0%. At the same oxygen production rate, oxygen recovery has a higher oxygen utilization rate than oxygen recovery; see comparison below. Figure 6 .

[0102] The oxygen supply system in the coupling system of this invention can adopt an oxygen recovery mode, saving oxygen production energy consumption. At the same time, the coupling system connects the hot air (N2, etc.) discharged from the outdoor oxygen generator to the outdoor heat exchanger, utilizing the waste heat from the oxygen production process to enhance the heat exchange efficiency of the outdoor heat exchanger in the heating system.

[0103] The example provides a comparison of energy consumption between the coupled system and a conventional standalone system (without oxygen recovery), as shown in Table 2. Both the coupled and standalone systems were calculated based on the premise of meeting the same room requirements for heat, oxygen, humidity, and fresh air. In the table, "Running Time" represents the duration required to meet these requirements.

[0104] Table 2 Comparison of Energy Saving Effects

[0105] The results show that the coupled system of this invention is more energy-efficient than the independent system. In the embodiments in Table 2, the impact of the coupled supply system on the reduced capacity of the humidification and heating modules is ignored, but from the initial state to the point where the indoor environment meets the requirements for heat, oxygen, humidity, and fresh air, energy consumption can still be reduced by 21.9%, approximately 2.4 kWh. The indoor heat, oxygen, and humidity coordinated supply system for plateau areas based on a fresh air system described in this invention can coupled and supply heat, oxygen, humidity, and fresh air to meet building needs, while achieving energy savings of over 21.9% compared to traditional decentralized independent systems.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for coordinated supply of heat, oxygen, and humidity to indoor spaces in plateau regions based on a fresh air system, characterized in that: A heat-oxygen-humidity-fresh air coupled system is adopted, including an air conditioning system, an oxygen supply system, a humidification system, and a fresh air system. The coordinated supply method includes the following steps: S1: Determine the local altitude, outdoor meteorological parameters, building parameters, and oxygen concentration requirements for the plateau region. C 0; S2: Calculate the design value of the oxygen supply flow rate for the room oxygen supply system at the local altitude. In the formula: V z This represents the design value of oxygen supply flow rate, in meters (m³). 3 / h; p r This indicates the number of people involved in the room design. V ren This indicates the oxygen consumption per person in the room, in units of... m 3 / ( h·person) ; V hs This indicates the flow rate (m) of mixed oxygen delivered by the oxygen recovery equipment. 3 / h; C 0 indicates the required oxygen concentration, expressed in %; ω hs This indicates the oxygen concentration output from the oxygen recovery and treatment equipment, expressed in % (%). V xfs This represents the indoor fresh air design value, in cubic meters (m³). 3 / h; ω sw This indicates the oxygen concentration in outdoor air, expressed in % %. ω z This indicates the oxygen concentration output from the oxygen generator, expressed in % (%). S3: Considering the coupling effect of oxygen supply, the fresh air flow rate is corrected and calculated based on the oxygen supply flow rate: In the formula: This indicates the correction value for fresh air supply flow rate, in meters (m³). 3 / h; S4: Considering the impact of the fresh air system and oxygen supply system, calculate the design value of humidification capacity: In the formula: H s This is the design value for humidification rate, in ml / h. ρ n Indoor air density at local atmospheric pressure, in kg / m³ 3 , The indoor air humidity at the previous moment is expressed in g / kg. ρ w Outdoor air density at local atmospheric pressure, in kg / m³ 3 ; d 0 represents the local outdoor air humidity, expressed in g / kg; ρ water The density of water is expressed in units of 1000g. g / ml ; S5: Corrects the impact of altitude on heat load calculation, considers the impact of fresh air system, humidification system, and oxygen supply system on heating system, and calculates indoor heating air volume: In the formula: This indicates the indoor heating air volume, in units of... m 3 / h ; The altitude correction factor for heat load is dimensionless. Q h The typical day winter heat load for a typical room is expressed in kW. c psa This represents the specific heat capacity of saturated water vapor at the local atmospheric pressure, expressed in kJ / (kg·°C). ΔT W The temperature rise of the humidified air in the heating and humidification system is expressed in °C. This indicates the specific heat capacity of indoor air, expressed in kJ / (kg·°C). ΔT o2 The temperature rise for heating oxygen is expressed in °C. T s Calculate the supply air temperature for the air conditioning system, in °C; T n Calculate the local indoor air temperature, in °C.

2. The method for coordinated indoor heat, oxygen, and humidity supply in plateau areas based on a fresh air system according to claim 1, characterized in that, In S2, the oxygen mass conservation equation is as follows: In the formula, Indicates time, in units of h ; V xf This indicates the fresh air supply flow rate, measured in meters (m³). 3 / h; V p This indicates the airflow rate of air discharged from indoors that has not been recovered for oxygen, expressed in meters (m³). 3 / h; V r This indicates the flow rate of the room return air to the oxygen recovery equipment, in meters per second (m³). 3 / h; ω p The oxygen concentration in the exhaust air is expressed as %; A represents the area of ​​a typical room, in square meters. 2 ; l r Typical room height, in meters; ω sn0 , ω sn These represent the initial indoor oxygen concentration and the indoor oxygen concentration after a period of oxygen supply, respectively, in units of .

3. The method for coordinated indoor heat, oxygen, and humidity supply in plateau areas based on a fresh air system according to claim 2, characterized in that, In S2, The percentage of recovered oxygen in the exhaust air volume is: α , , Constant room air pressure , The airflow entering the room after oxygen recovery is: , Indoor oxygen content is expressed as: 。 4. The method for coordinated indoor heat, oxygen, and humidity supply in plateau areas based on a fresh air system according to claim 1, characterized in that, In S4, The dynamic equilibrium equation for room water vapor content is: In the formula, m This indicates the mass of water vapor in the indoor air at the current moment, expressed in grams (g). m’ This represents the mass of water vapor in the indoor air at the previous moment, expressed in grams. H Humidification rate, unit is ml / h; τ Time, in hours; V xf This indicates the fresh air supply flow rate, measured in meters (m³). 3 / h; ρ w The outdoor air density under local atmospheric pressure is expressed in kg / m³. d 0 represents the local outdoor air humidity, expressed in g / kg; The humidity level of the indoor air at the previous moment is expressed in g / kg.

5. The method for coordinated indoor heat, oxygen, and humidity supply in plateau areas based on a fresh air system according to claim 1, characterized in that, In S5, The actual heat load is linearly related to the indoor-outdoor temperature difference; therefore, a correction is made for the actual heat load. In the formula: T w Calculate the local outdoor air temperature, in °C; h altitude κ represents the local altitude in meters (m); κ represents the decrease in outdoor temperature for every 100m increase in altitude in degrees Celsius (°C).

6. A method for coordinated control of indoor heat, oxygen, and humidity in plateau areas based on a fresh air system, characterized in that, The method for determining the design value of oxygen supply flow rate, the correction value of fresh air supply flow rate, the design value of humidification capacity, and the indoor heating supply air volume based on a fresh air system in plateau areas, as described in any one of claims 1-5, further includes the following steps: S6: Set oxygen concentration requirements C 0. Humidity requirements Room temperature requirements T 0, Real-time monitoring of indoor oxygen concentration ω cs Indoor relative humidity Room temperature T cs ; S7: Control the oxygen supply system's on / off state based on the monitored indoor oxygen concentration. like ω cs > C 0, the oxygen supply system is not running; otherwise, the oxygen supply system remains running. The humidification system is turned on and off based on the indoor relative humidity: like > If the humidification system fails to start, it will not operate; otherwise, it will start. The heating system is controlled to turn on and off based on monitored room temperature. If the heating system was detected to be running at the previous moment... T cs > T When 0+M, the heating system is turned off; otherwise, the heating system is turned on; if the heating system was detected to be off in the previous moment, T cs < T When the temperature is 0, the heating system starts; otherwise, the heating system shuts down. M represents the set temperature range value, in °C.

7. The method for coordinated control of indoor heat, oxygen, and humidity in plateau areas according to claim 6, characterized in that, Seven control modes are adopted respectively: Mode 1 is suitable for the heating season and includes functions such as oxygen supply, humidification, and heating; Mode 2 is suitable for the heating season and includes functions such as oxygen supply and heating. Mode 3 is suitable for the heating season and includes functions such as humidification and heating; Mode 4 is suitable for the transitional season and includes functions such as oxygen supply and humidification; Mode 5 is suitable for standalone control and includes oxygen supply functionality; Mode 6 is suitable for individual control and includes humidification functions; Mode 7 is suitable for individual control and includes functions such as heating. The heating function includes a built-in fresh air function.

8. A method for coordinated control of indoor heat, oxygen, and humidity in plateau areas according to claim 7, characterized in that, In Mode 2, the heat-oxygen-humidity coupling system assigns a value to the indoor relative humidity, making In this mode, the humidification system remains off; in mode 3, the heat-oxygen-humidity coupling system assigns a value to the indoor oxygen concentration. ω cs = C If the value is 0, the oxygen supply system remains closed; in Mode 4, the heat-oxygen-humidity coupling system assigns a value to the room temperature, making... T cs = T If 0+M, the heating system will remain off.

9. A combined indoor heat, oxygen, and humidity supply system for plateau regions based on a fresh air system, characterized in that, The method for coordinated supply of heat, oxygen, and humidity in indoor high-altitude areas based on a fresh air system, as described in any one of claims 1-5, is adopted.

10. A computer-readable storage medium, characterized in that, The system includes a stored computer program, wherein, when the computer program is executed, it controls the device containing the computer-readable storage medium to perform the indoor heat, oxygen, and humidity co-supply method for high-altitude areas based on a fresh air system as described in any one of claims 1-5.

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