CN110617609A - Energy management method of air conditioning system for subway station - Google Patents
Energy management method of air conditioning system for subway station Download PDFInfo
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- CN110617609A CN110617609A CN201910959072.1A CN201910959072A CN110617609A CN 110617609 A CN110617609 A CN 110617609A CN 201910959072 A CN201910959072 A CN 201910959072A CN 110617609 A CN110617609 A CN 110617609A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
- F24F2110/22—Humidity of the outside air
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an energy management method of an air conditioning system for a subway station, which controls the air conditioning system through a subway station environment monitoring system BAS and comprises the following steps: s1, when the outdoor air wet bulb temperature is larger than or equal to the return air wet bulb temperature, S2, when the outdoor air wet bulb temperature is smaller than the return air wet bulb temperature, S3, when the outdoor air dry bulb temperature is larger than or equal to the air supply temperature of the air conditioning unit, S4, and when the outdoor air dry bulb temperature is smaller than the air supply temperature of the air conditioning unit, the air conditioning system under four states is managed and controlled; the air conditioning system can meet the control requirement for changing the air conditioning system in different environmental states, so that when environmental conditions are guaranteed to be comfortable, electric energy can be effectively saved, unnecessary waste is avoided, and the existing problem is solved.
Description
Technical Field
The invention relates to the technical field of air conditioner management methods, in particular to an energy management method of an air conditioner system for a subway station.
Background
In the operation process of the subway station, a central air-conditioning system is a main energy consumption device, and a fan of a heating, ventilating and air-conditioning system of the central air-conditioning system is the part with the most power consumption; if the energy consumption of the heating, ventilating and air conditioning system of the central air conditioner is required to be reduced, the method must be started from how to reduce the power consumption of a fan; from a macroscopic perspective, the total energy consumption of the central air-conditioning system finally depends on the indoor temperature and humidity environment to be achieved, namely, the central air-conditioning system consumes electric energy for maintaining the temperature and humidity difference between the subway station and the outdoor temperature and humidity; when the temperature and humidity environment in the station exceeds the requirement of most passengers on the comfort of the temperature and humidity environment, the central air-conditioning system does not need to maintain the consumed electric energy of the exceeding part, and the electric energy of the exceeding part can be saved; therefore, the primary task of reducing the energy consumption of the central air-conditioning system is to research the temperature and humidity which can meet the comfort requirement of most passengers; in real life, everyone feels about the humiture different, and some people feel cold and some people feel hot in the same humiture environment, and the environment outside subway station is also constantly changing simultaneously, wants to reach better energy-conserving effect, and central air conditioning control system must be a self-adaptation system that can change along with external environment changes.
In view of the above, the present invention provides an energy management method for an air conditioning system for a subway station, which aims to solve the problems and improve the practical value by the technology.
Disclosure of Invention
The invention aims to provide an energy management method of an air conditioning system for a subway station, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides an air conditioning system energy management method for a subway station, which is achieved by the following specific technical means:
an air conditioning system energy management method for a subway station mainly controls the air conditioning system through a subway station environment monitoring system BAS, and the method comprises the following steps:
s1, when the outdoor air wet bulb temperature is larger than or equal to the return air wet bulb temperature and the outdoor air dew point temperature is larger than or equal to the air outlet dew point temperature of the surface cooler of the air conditioning box, namely tF 'is more than or equal to tc', 22.4 ℃ and tFl is more than or equal to tAl, 18.2 ℃, when the enthalpy value of the outside air is more than the return air enthalpy value of the air conditioning system of the station, namely h outdoor and more than h indoor, the summer season belongs to, at the moment, the return air enthalpy value is lower than the outdoor air enthalpy value, in order to save energy and fully utilize indoor return air, the air conditioning system adopts a minimum fresh air quantity cooling and dehumidifying mode, and uses small fresh air and once return air to operate, and when the mode is adopted, the BAS system controls the fresh air fan, the air mixing valve and the fresh air valve of the air conditioner in a linkage manner, so that one part of return air is discharged out of a station, the other part of return air is mixed with fresh air according to the minimum fresh air ratio and then is cooled by the surface air cooler for supplying air, the air treatment process of the surface air cooler is cooling and dehumidifying, and the minimum fresh air quantity is determined by meeting the requirement of indoor personnel on air quality and ensuring the positive pressure of a room.
S2, when the outdoor air wet bulb temperature is less than the return air wet bulb temperature, but the outdoor air dew point temperature is more than the air outlet dew point temperature of the surface cooler of the air-conditioning box, namely tF 'is less than tc', 22.4 ℃ but tFl is more than tAl, 18.2 ℃, when the outdoor air enthalpy is less than or equal to the station air-conditioning large system return air enthalpy but is higher than the air-conditioning supply enthalpy, the h outside is less than or equal to the h outside, the h outside is less than or equal to the h inside, the air enters the early summer or the end of the summer, because the return air enthalpy is always higher than the outdoor air enthalpy, if the return air is used, the air enthalpy after being mixed with the fresh air is higher than the enthalpy of the fresh air, the load of the air-conditioner is increased inevitably, in order to save energy, the air-conditioning system adopts a fresh air dehumidification cooling mode, when the BAS system closes the return air valve, opens the fresh air valve, all adopts the outdoor fresh air, the air is exhausted to the air-conditioning area after, the air exhaust valve is fully opened, all the return exhaust air is exhausted outdoors, and the adjusting method when the outdoor air state and the indoor heat and humidity load change is the same as the small fresh air mode in the air conditioner season.
S3, when the outdoor air dry bulb temperature is larger than or equal to the air supply temperature of the air conditioning unit, but the outdoor air dew point temperature is smaller than the air outlet dew point temperature of the surface cooler of the air conditioning box, namely tF is larger than or equal to 19 ℃, but tFl & lt tAl & gt is 18.2 ℃, the enthalpy value of outdoor air is smaller than the air supply enthalpy value of the air conditioner, namely, Hadoku (outdoor air) is used for supplying air, a humidity cooling mode such as full fresh air is adopted, the indoor set temperature can be determined according to the outdoor air state point in the air supply state of the mode, and then the air.
S4, when the temperature of the outdoor air dry bulb is less than the air supply temperature of the air conditioning unit, namely tF is less than 19 ℃, the enthalpy of the outdoor air is less than the air supply enthalpy of the air conditioning unit, outdoor air supply is less than h, the ventilation mode is adopted, the operation of the water chilling unit is stopped, the fresh air of the air conditioning unit is closed, the fresh air valve of the air conditioning unit is opened, the outside air is directly sent to a public area without being cooled, the air return valve at the positive pressure end of the air return fan is closed, the air exhaust valve is fully opened, and all the return air is exhausted outdoors.
Due to the application of the technical scheme, the invention has the following advantages:
1. the air conditioning system energy management method for the subway station controls the air conditioning system through the subway station environment monitoring system BAS, can meet the control requirement of changing the air conditioning system in different environment states, and can effectively save electric energy and avoid unnecessary waste when the comfort of the environment condition is ensured, thereby effectively solving the problems and the defects in the background technology.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flow chart illustrating automatic control and judgment of an air conditioning system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, the present invention provides a specific technical embodiment of an energy management method for an air conditioning system for a subway station:
an air conditioning system energy management method for a subway station mainly controls the air conditioning system through a subway station environment monitoring system BAS, and the method comprises the following steps:
s1, when the outdoor air wet bulb temperature is larger than or equal to the return air wet bulb temperature and the outdoor air dew point temperature is larger than or equal to the air outlet dew point temperature of the surface cooler of the air conditioning box, namely tF 'is more than or equal to tc', 22.4 ℃ and tFl is more than or equal to tAl, 18.2 ℃, when the enthalpy value of the outside air is more than the return air enthalpy value of the air conditioning system of the station, namely h outdoor and more than h indoor, the summer season belongs to, at the moment, the return air enthalpy value is lower than the outdoor air enthalpy value, in order to save energy and fully utilize indoor return air, the air conditioning system adopts a minimum fresh air quantity cooling and dehumidifying mode, and uses small fresh air and once return air to operate, and when the mode is adopted, the BAS system controls the fresh air fan, the air mixing valve and the fresh air valve of the air conditioner in a linkage manner, so that one part of return air is discharged out of a station, the other part of return air is mixed with fresh air according to the minimum fresh air ratio and then is cooled by the surface air cooler for supplying air, the air treatment process of the surface air cooler is cooling and dehumidifying, and the minimum fresh air quantity is determined by meeting the requirement of indoor personnel on air quality and ensuring the positive pressure of a room.
S2, when the outdoor air wet bulb temperature is less than the return air wet bulb temperature, but the outdoor air dew point temperature is more than the air outlet dew point temperature of the surface cooler of the air-conditioning box, namely tF 'is less than tc', 22.4 ℃ but tFl is more than tAl, 18.2 ℃, when the outdoor air enthalpy is less than or equal to the station air-conditioning large system return air enthalpy but is higher than the air-conditioning supply enthalpy, the h outside is less than or equal to the h outside, the h outside is less than or equal to the h inside, the air enters the early summer or the end of the summer, because the return air enthalpy is always higher than the outdoor air enthalpy, if the return air is used, the air enthalpy after being mixed with the fresh air is higher than the enthalpy of the fresh air, the load of the air-conditioner is increased inevitably, in order to save energy, the air-conditioning system adopts a fresh air dehumidification cooling mode, when the BAS system closes the return air valve, opens the fresh air valve, all adopts the outdoor fresh air, the air is exhausted to the air-conditioning area after, the air exhaust valve is fully opened, all the return exhaust air is exhausted outdoors, and the adjusting method when the outdoor air state and the indoor heat and humidity load change is the same as the small fresh air mode in the air conditioner season.
S3, when the outdoor air dry bulb temperature is larger than or equal to the air supply temperature of the air conditioning unit, but the outdoor air dew point temperature is smaller than the air outlet dew point temperature of the surface cooler of the air conditioning box, namely tF is larger than or equal to 19 ℃, but tFl & lt tAl & gt is 18.2 ℃, the enthalpy value of outdoor air is smaller than the air supply enthalpy value of the air conditioner, namely, Hadoku (outdoor air) is used for supplying air, a humidity cooling mode such as full fresh air is adopted, the indoor set temperature can be determined according to the outdoor air state point in the air supply state of the mode, and then the air.
S4, when the temperature of the outdoor air dry bulb is less than the air supply temperature of the air conditioning unit, namely tF is less than 19 ℃, the enthalpy of the outdoor air is less than the air supply enthalpy of the air conditioning unit, outdoor air supply is less than h, the ventilation mode is adopted, the operation of the water chilling unit is stopped, the fresh air of the air conditioning unit is closed, the fresh air valve of the air conditioning unit is opened, the outside air is directly sent to a public area without being cooled, the air return valve at the positive pressure end of the air return fan is closed, the air exhaust valve is fully opened, and all the return air is exhausted outdoors.
The method comprises the following specific implementation steps: the key of the above 4 working condition conversion of the air conditioning ventilation system is the calculation and comparison judgment of the indoor and outdoor air enthalpy values, the system detects the dry bulb temperature and relative humidity signal of the air, the enthalpy value of the air is determined by the air temperature and humidity, and the temperature and humidity change every moment, so the enthalpy value also changes, but the air state changes slowly due to the large public space of the station, which belongs to the large hysteresis link, in order to prevent the frequent conversion of the working conditions in one day, the BAS subsystem respectively calculates the average value of the indoor and outdoor air enthalpy values within 0.5-1 hour (the time can be set) by using the timing task processing mode, compares the average value and judges the critical conditions of the conversion between the normal working conditions (the small fresh air in the air conditioning season, the full fresh air in the air conditioning season and the non-air conditioning season), wherein the enthalpy value calculation method is as follows:
T＝273.15+t
ln(Pq,b)＝C8/T+C9+C10T+C11T2+C12T3+C13ln(T)
C8＝-5800.226，C9＝1.3914993，C10＝-0.04860239，C11＝0.41764768×10-4
C12＝-0.14452093×10-7，C13＝6.5459673
φ＝Pq/Pq,b
d＝622Pq/(B-Pq)
h＝1.01t+0.001d(2501+1.84t)
description of the symbols:
t: air dry bulb temperature, unit;
t: absolute temperature scale, unit K;
pq, b: saturated water vapor partial pressure at the temperature in Pa;
pq: the water vapor partial pressure of the air at the temperature is in unit Pa;
b: actual atmospheric pressure, in Pa;
phi: the relative humidity of the air;
d: the air moisture content, unit g/kg dry air;
h: air enthalpy, unit kJ/kg dry air.
In summary, the following steps: according to the air conditioning system energy management method for the subway station, the air conditioning system is controlled through the subway station environment monitoring system BAS, the control requirement for changing the air conditioning system in different environment states can be met, the comfort of environment conditions is guaranteed, electric energy can be effectively saved, unnecessary waste is avoided, and the existing problems are solved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. An air conditioning system energy management method for a subway station mainly controls the air conditioning system through a subway station environment monitoring system BAS, and the method comprises the following steps:
s1, when the outdoor air wet bulb temperature is larger than or equal to the return air wet bulb temperature and the outdoor air dew point temperature is larger than or equal to the air outlet dew point temperature of the surface cooler of the air conditioning box, namely tF ' ≥ tc ' =22.4 ℃ and tFl ' = tAl =18.2 ℃, when the outdoor air enthalpy value is larger than the station air-conditioning large system return air enthalpy value h outdoor > h indoor, the summer season belongs to, at this time, because the return air enthalpy value is lower than the outdoor air enthalpy value, in order to save energy and fully utilize indoor return air, the air conditioning system adopts a minimum fresh air quantity cooling and dehumidifying mode, and uses small fresh air and once return air to operate, and when the mode is adopted, the BAS system controls a fresh air fan, an air mixing valve and a fresh air valve of the air conditioner in a linkage manner, so that a part of return air is discharged out of a station, the other part of return air is mixed with fresh air according to the minimum fresh air ratio, and then is cooled by a surface air cooler and then is supplied with air, the air treatment process of the surface air cooler is temperature reduction and dehumidification, and the minimum fresh air volume is determined by meeting the requirement of indoor personnel on air quality and ensuring the positive pressure of a room;
s2, when the outdoor air wet bulb temperature is less than the return air wet bulb temperature, but the outdoor air dew point temperature is more than the air outlet dew point temperature of the surface cooler of the air-conditioning box, namely tF '< tc' =22.4 ℃, but tFl > tAl =18.2 ℃, when the outdoor air enthalpy is less than or equal to the station air-conditioning large system return air enthalpy but higher than the air-conditioning supply enthalpy, the h supply is less than or equal to the h outdoor and less than the h indoor, the air enters the early summer or late summer, because the return air enthalpy is always higher than the outdoor air enthalpy, if the return air is used, the enthalpy of the air mixed with the fresh air is higher than the enthalpy of the fresh air, the load of the air-conditioning is increased, in order to save energy, the air-conditioning system adopts a fresh air cooling and dehumidifying mode, when the BAS system closes the return air valve, opens the fresh air valve, the outdoor fresh air is completely adopted, the air-conditioning is treated by the surface cooler of the group and then is sent to the air-, the air exhaust valve is fully opened, all the return exhaust air is exhausted outdoors, and the adjusting method when the outdoor air state and the indoor heat and humidity load change is the same as the small fresh air mode in the air conditioner season;
s3, when the outdoor air dry bulb temperature is larger than or equal to the air supply temperature of the air conditioning unit, but the outdoor air dew point temperature is smaller than the air outlet dew point temperature of the surface cooler of the air conditioning box, namely tF is larger than or equal to 19 ℃, but tFl is smaller than tAl =18.2 ℃, the outdoor air enthalpy value is smaller than the air supply enthalpy value of the air conditioner, and the outdoor air is smaller than h for air supply, a full fresh air equal humidity cooling mode is adopted, the indoor set temperature can be determined according to the outdoor air state point in the air supply mode, and then the air supply state point is determined;
s4, when the temperature of the outdoor air dry bulb is less than the air supply temperature of the air conditioning unit, namely tF is less than 19 ℃, the enthalpy value of the outdoor air is less than the air supply enthalpy value of the air conditioner, h outdoor air is less than h air supply, the operation of the water cooling unit is stopped in a ventilation mode, the fresh air of the air conditioner is closed, a fresh air valve of the air conditioner is opened, the outside air is directly sent to a public area from the air conditioning cabinet without being cooled, the air return valve at the positive pressure end of the air return fan is closed, the air exhaust valve is fully opened, and all the return air is exhausted.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111694388A (en) * | 2020-05-06 | 2020-09-22 | 广州地铁设计研究院股份有限公司 | Intelligent subway monitoring system and control method |
| CN111947275A (en) * | 2020-07-31 | 2020-11-17 | 南京理工大学 | Subway station wind-water linkage energy-saving optimization method |
| CN112611076A (en) * | 2020-11-23 | 2021-04-06 | 国电南瑞科技股份有限公司 | Subway station ventilation air conditioner energy-saving control system and method based on ISCS |
| CN115183412A (en) * | 2022-08-09 | 2022-10-14 | 红云红河烟草(集团)有限责任公司 | Automatic control method for new air door of combined air conditioning unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111694388A (en) * | 2020-05-06 | 2020-09-22 | 广州地铁设计研究院股份有限公司 | Intelligent subway monitoring system and control method |
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| CN115183412A (en) * | 2022-08-09 | 2022-10-14 | 红云红河烟草(集团)有限责任公司 | Automatic control method for new air door of combined air conditioning unit |
| CN115183412B (en) * | 2022-08-09 | 2023-11-14 | 红云红河烟草(集团)有限责任公司 | Automatic control method for new air door of combined air conditioning unit |
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Application publication date: 20191227 |
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| RJ01 | Rejection of invention patent application after publication |