CN108224632A - Hotel Buildings central air conditioner room chilled water system comprehensive energy efficiency lifting control method - Google Patents
Hotel Buildings central air conditioner room chilled water system comprehensive energy efficiency lifting control method Download PDFInfo
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- CN108224632A CN108224632A CN201711451150.4A CN201711451150A CN108224632A CN 108224632 A CN108224632 A CN 108224632A CN 201711451150 A CN201711451150 A CN 201711451150A CN 108224632 A CN108224632 A CN 108224632A
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- chilled water
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Classifications
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
Abstract
A kind of Hotel Buildings central air conditioner room chilled water system comprehensive energy efficiency lifting control method of the energy and field of energy-saving technology, data of this method first by reading hotel's plug-in card electricity getting system, the personnel in hotel are obtained in room rate, the highest outside air temperature T controlled to adjust according to the personnel in hotel in the dynamic adjustment execution of room rateendCorresponding host leaving water temperature desired value, according to the variation of ambient temperature and current personnel in room rate, dynamic regulation air-conditioner host chilled water leaving water temperature improves the operational efficiency kW/ton of host with this；Secondly, variable frequency adjustment is carried out to chilled water pump by using for the control of return water pressure difference, it is finally, optimal for target with host and refrigerating water pump comprehensive energy efficiency kW/ton to reduce the operation energy consumption of refrigerating water pump, optimization is adjusted to host and refrigerating water pump operating parameter.Reasonable design of the present invention, it is simple in structure, the comprehensive energy efficiency of Hotels with Central Air-Condition chilled water system can be made to keep optimum state.
Description
Technical field
It is specifically a kind of to be directed to Hotel Buildings central air conditioner room chilled water the invention belongs to the energy and field of energy-saving technology
System comprehensive energy efficiency lifting control method.
Background technology
Air-conditioning energy consumption expense occupies a big chunk ratio in hotel operating cost, utilizes intelligentized control method means
The operational energy efficiency for improving Hotels with Central Air-Condition is the effective way for reducing hotel air conditioning system operating cost.Hotels with Central Air-Condition is usually
According to the configuration of maximum cold workload demand, i.e. the air-conditioning refrigeration duty of environment temperature and hotel personnel under the most high operating mode of room rate needs
It asks.But in the practical operation in hotel, the personnel in hotel exist in the different time sections among working day and day off and one day
Room rate has very big gap, in this way, hotel personnel in room rate relatively low and in the case that outside air temperature is relatively low, center
Air-conditioning is often in the state of low load with strong power, and therefore, there are bigger energy saving and efficiency increasing spaces for the central air-conditioning of Hotel Buildings.
In the energy consumption of central air conditioner system, water system energy consumption accounts for the 60~70% of central air conditioner system total energy consumption.Mesh
It is preceding for Hotels with Central Air-Condition water system efficiency promoted method mainly according to environment temperature to host leaving water temperature reset with
And changeable flow adjustment is carried out to a refrigerating water pump, but hotel personnel are had ignored in influence of the room rate to central air conditioner energy efficiency.
Invention content
The present invention for Hotel Buildings personnel room rate change greatly, air conditioning energy consumption height and the big spy of efficiency room for promotion
Point, under the premise of hotel end refrigeration duty needs are met, according to hotel personnel room rate and environment temperature variation, it is dynamic in real time
State adjusts the operating parameter of host and chilled water pump, realizes that the comprehensive energy efficiency of Hotel Buildings freezing water system of central air conditioner is promoted.
The technical problem to be solved by the present invention is to for Hotel Buildings central air-conditioning, the prior art is mostly according to outdoor ring
Border temperature control air-conditioner host leaving water temperature, adjusts water pump frequency to reach energy-saving operation of air conditioner using primary pump variable flow technology
Purpose, have ignored hotel personnel in influence of the room rate to hotel's refrigeration duty demand, therefore central air conditioner system efficiency still has
It waits to improve.
The present invention is achieved through the following technical solutions：The present invention includes the following steps：First, by reading hotel
The data of plug-in card electricity getting system obtain the real-time personnel in hotel in room room number n, the real time personnel in hotel are further calculated
In room rate λ；Second, according to hotel's real time personnel in room rate λ, dynamic calculates current persons in room rate λ, performs control and regulation
Highest outside air temperature TendCorresponding host leaving water temperature desired value Tλ；Third, according to outside air temperature TOADynamic is adjusted
Whole host chilled water leaving water temperature desired value TSET；4th, when hotel personnel are when room rate changes, room air conditioner end
Two-way valve opening can be held big or turn down or close automatically, and air conditioning water system is caused to change for return main's pressure difference, lead to
It crosses control chilled water and fuzzy control is carried out to freezing pump frequency in desired value Δ P for return water pressure difference stabilization, improve the energy of refrigerating water pump
Valid value (kW/ton)Refrigerating water pump, Air Conditioning Facilities chilled water system comprehensive energy efficiency (kW/ton) is further calculatedChilled water system；5th, lead to
It crosses database model and calculates analysis, judge whether the chilled water system comprehensive energy efficiency under current operating data is optimal, meanwhile, it compares
Operation data under each operating mode of central air conditioner system history obtains the optimal chilled water water outlet temperature setting value of air-conditioner host so that
The whole efficiency of central air conditioner room chilled water system keeps optimum state.
The core technology of this patent is, air-conditioner host is controlled, by obtaining personnel from hotel's plug-in card electricity getting system
In room room number, and hotel personnel are calculated in room rate λ, and then obtain current persons and perform what is controlled to adjust under the rate λ of room
Highest outside air temperature TendCorresponding host leaving water temperature desired value Tλ, according to current outdoor air themperature TOADynamic is adjusted
Whole chilled water water outlet target temperature TSET, so as to optimize control to host, and obtain the efficiency kW/ton of host；
Chilled water pump is controlled, using chilled water for back pressure difference as main frequency conversion foundation, while with supply backwater temperature difference and
End least favorable pressure is frequency conversion boundary Control foundation, and fuzzy control is carried out, and obtain the efficiency kW/ton of water pump to refrigerating water pump；
For central air conditioner room chilled water system comprehensive energy efficiency kW/ton optimal controls, the freezing after dynamic control is calculated
Water system comprehensive energy efficiency kW/ton, and compared in real time with the data in database, find optimal chilled water system synthesis energy
KW/ton is imitated, and further adjusting and optimizing is done to host chilled water leaving water temperature on this basis, Air Conditioning Facilities is made to freeze water system
The comprehensive energy efficiency kW/ton of system keeps optimal.
The fuzzy control of host equipment is：According to personnel in the variation of room rate and outside air temperature variation and hotel pair
Host chilled water water outlet temperature setting desired value, the corrected Calculation of host leaving water temperature value is calculated in the requirement of indoor environment
Method is：
Wherein, TOA- current outdoor air themperature；
TstThe minimum outside air temperature that-execution controls to adjust；
TendThe highest outside air temperature that-execution controls to adjust；
Tmax- host leaving water temperature highest set value, is formulated according to Host Type；
TλThe minimum setting value of-host leaving water temperature dynamically adjusts in real time according to personnel in room rate；
TSET- host leaving water temperature target set point；
Further, the highest outside air temperature T of control and regulation is performedendCorresponding host leaving water temperature desired value Tλ
Computational methods are as follows：
Wherein, λ-current persons are in room rate；
λst- the minimum personnel controlled to adjust are performed in room rate；
λend- the highest personnel controlled to adjust are performed in room rate；
T1The minimum water outlet temperature setting value of-dynamic regulation host, ranging from 7~12 DEG C；
T2- dynamic regulation host maximum water temperature setting value, ranging from 7~12 DEG C；
TλThe highest outside air temperature T that-execution controls to adjustendCorresponding host leaving water temperature desired value；
Further：Hotel personnel are in the computational methods of room rate λ：
λ=n/N；
Wherein：N-plug-in card takes electric room quantity；
N-hotel room sum；
λ-hotel personnel are in room rate；
Host efficiency (kW/ton)HostComputational methods：
(kW/ton)Host=PHost/(Qc/3.517)
PHost=f (Ts, Tr)
Q=cGc(Tr-Ts)
Water pump efficiency (kW/ton)Refrigerating water pumpComputational methods：
(kW/ton)Refrigerating water pump=PRefrigerating water pump/(Qp/3.517)
PRefrigerating water pump=f (Gp,Hp,ηp,βp)
Chilled water comprehensive energy efficiency (kW/ton)Chilled water systemComputational methods：
In formula：Q overall refrigerating effects, Ts chilled water supply water temperatures, Tr chilled water return water temperatures, P power, c chilled water specific heat capacities,
G chilled water total flows, GcHost flow, GpFreeze pump discharge, HpFreeze pump lift, ηpRefrigerating water pump current efficiency, βpRefrigerating water pump is raised
Journey coefficient.
Description of the drawings
Fig. 1 is the relation curve of host chilled water water outlet temperature setting value and outside air temperature；
Fig. 2 is to perform the corresponding host water outlet temperature setting Zhi Yu hotel personnel of highest outside air temperature controlled to adjust
The relation curve of rate in room；
Fig. 3 is Hotels with Central Air-Condition chilled water system Fuzzy Control Chart；
Fig. 4 is Hotels with Central Air-Condition chilled water comprehensive energy efficiency lifting control method flow chart.
Specific embodiment
The present invention is first by hotel personnel in room rate λ and outside air temperature TOADynamic adjustment air-conditioner host chilled water goes out
Coolant-temperature gage desired value TSETIt realizes the fuzzy control to air-conditioner host, improves host efficiency (kW/ton)Host, particular by reading
The data of hotel's plug-in card electricity getting system obtain the real-time personnel in hotel in room room number n, the real-time of hotel are further calculated
Personnel are in room rate λ, and according to hotel's real time personnel in room rate λ, dynamic calculates current persons in room rate λ, performs control and regulation
Highest outside air temperature TendCorresponding host leaving water temperature desired value Tλ, further according to outside air temperature TOADynamic adjusts
Host chilled water leaving water temperature desired value TSET, when hotel personnel are when room rate changes, the two-port valve meeting of room air conditioner end
It is automatic to open big or turn down or close, air conditioning water system is caused to change for return main's pressure difference, by controlling chilled water
For return water pressure difference stabilization in desired value Δ P, fuzzy control is carried out to freezing pump frequency, improves the energy valid value (kW/ of refrigerating water pump
ton)Refrigerating water pump, Air Conditioning Facilities chilled water system comprehensive energy efficiency (kW/ton) is further calculatedChilled water system, pass through database model
Analysis is calculated, judges whether the chilled water system comprehensive energy efficiency under current operating data is optimal, meanwhile, compare central air conditioner system
Operation data under each operating mode of history obtains the optimal chilled water water outlet temperature setting value of air-conditioner host so that central air conditioner room
The whole efficiency of chilled water system keeps optimum state.
The most crucial technology of the present invention is mainly according to hotel personnel in room rate and outside air temperature dynamic adjustment air-conditioning
Host chilled water leaving water temperature desired value, the advantage of this chilled water leaving water temperature desired value control method is, as hotel people
Member is relatively low in room rate, and such as 30%, outside air temperature is higher, at such as 35 DEG C, according to traditional control mode, air-conditioner host water outlet
Temperature target is 7 DEG C, it is proposed, according to the invention, air-conditioner host leaving water temperature can be set to 8 DEG C or higher.Thus it further improves
The operational energy efficiency of air-conditioner host.
Technical solution is as described below used by the present invention is promoted for Hotels with Central Air-Condition computer room chilled water system efficiency.
1st, timing acquiring hotel plug-in card electricity getting system data calculate current time hotel personnel in room rate λ；
Hotel personnel are in the computational methods of room rate λ：
λ=n/N；
Wherein：N-current plug-in card takes electric room quantity；
N-hotel room sum；
λ-hotel personnel are in room rate；
2nd, judge whether Air Conditioning Facilities freezing water control system performs, judgment method is, current time personnel room rate with
Last moment personnel make difference in room rate or compare as quotient, compared with setting deviation Δ λ, judge that hotel personnel are in the variation of room rate
It is no in allowed band, if not, be so carried out, if it is, further judging outside air temperature variation whether fair
Perhaps in the range of, method is consistent with the above method, if hotel personnel are allowing model in the variation of room rate and outside air temperature
In enclosing, then not executive control system, it is more than allowed band that the two, which has any, then executive control system；
3rd, current persons are calculated in room rate λ, perform the highest outside air temperature T of control and regulationendCorresponding host
Leaving water temperature desired value Tλ
Wherein, λ-current persons are in room rate；
λst- the minimum personnel controlled to adjust are performed in room rate, it is set according to hotel's actual conditions；
λend- the highest personnel controlled to adjust are performed in room rate, it is set according to hotel's actual conditions；
T1The minimum water outlet temperature setting value of-dynamic regulation host, ranging from 7~12 DEG C；
T2- dynamic regulation host maximum water temperature setting value, ranging from 7~12 DEG C；
4th, host leaving water temperature desired value T of the current persons in room rate and outside air temperature is calculatedSET：
Wherein, TOA- current outdoor air themperature；
TstThe minimum outside air temperature that-execution controls to adjust；
TendThe highest outside air temperature that-execution controls to adjust；
Tmax- host leaving water temperature highest set value, is formulated according to Host Type；
TλThe highest outside air temperature T that-execution controls to adjustendCorresponding host leaving water temperature desired value, according to
Personnel dynamically adjust in real time in room rate；
It should be noted that host chilled water leaving water temperature has direct influence to the efficiency of host, know according to existing research
Road, at the same conditions, host chilled water leaving water temperature often increase 1 DEG C, and the operational efficiency of host can improve 3%.
5th, chilled water pump frequency control
When hotel personnel are when room rate changes, the two-port valve of room air conditioner end can be held big or turn down or close automatically
It closes, air conditioning water system is caused to change for return main's pressure difference, chilled water is adjusted by the frequency for controlling chilled water pump
For return water pressure difference stabilization to desired value Δ P, promoted so as to fulfill the efficiency of chilled water pump.It is cold when chilled water pump frequency reduces
Freezing water supply backwater temperature difference can accordingly increase, and end least favorable pressure point pressure can also reduce, therefore therewith in chilled water pump frequency conversion
It needs to carry out fuzzy control to water pump according to these three parameters during control.
It should be pointed out that theoretically, power and the rotating speed of chilled water pump are in 3 power relationships, i.e., by low to refrigerating water pump
Frequency is run, and can largely reduce the power of refrigerating water pump, the relationship of rotating speed and frequency particularly with regard to chilled water pump, Yi Jishui
The technology that the rotating speed of pump is well known in the art with the relationship of flow, lift and power, is not detailed here.
6th, Air Conditioning Facilities chilled water system comprehensive energy efficiency (kW/ton) is calculatedChilled water system；
Chilled water system comprehensive energy efficiency (kW/ton)Chilled water systemComputational methods：
Wherein：PHost=f (Ts, Tr)
PRefrigerating water pump=f (Gp,Hp,ηp,βp)
Q=cGc(Tr-Ts)
In formula：Q overall refrigerating effects, Ts chilled water supply water temperatures, Tr chilled water return water temperatures, P power, c chilled water specific heat capacities,
G chilled water total flows, GpFreeze pump discharge, HpFreeze pump lift, ηpRefrigerating water pump current efficiency, βpRefrigerating water pump head coefficient.
PHostAnd PRefrigerating water pumpFunctional relation be techniques well known, be no longer described in detail.
7th, to computer room chilled water system comprehensive energy efficiency tuning
It can be seen that, the raising of host chilled water water outlet temperature setting value is conducive to improve host operation effect by the above process
Rate reduces host energy consumption, and the operation energy consumption of refrigerating water pump can be reduced by reducing water pump operation frequency by variable frequency adjustment.However, work as
After host chilled water leaving water temperature improves, the heat exchange efficiency of room air conditioner end airhandling equipment such as fan coil is by under
Drop, to meet current refrigeration duty demand, is then necessarily required to out big two-port valve valve opening, to increase chilled-water flow.This
Sample results in freezing pump frequency to need to improve to meet the increased demand of chilled-water flow.So host chilled water leaving water temperature carries
Height is unfavorable for reducing pump energy consumption, and finding one makes host and the optimal corresponding host freezing of refrigerating water pump comprehensive energy efficiency
Water leaving water temperature then very it is necessary to.It is calculated and analyzed by database model, judge the chilled water system under current operating data
Whether comprehensive energy efficiency is optimal, meanwhile, the operation data under each operating mode of central air conditioner system history is compared, it is optimal to obtain air-conditioner host
Chilled water water outlet temperature setting value so that the whole efficiency of central air conditioner room chilled water system keeps optimum state.
Claims (6)
1. a kind of Hotel Buildings central air conditioner room chilled water system comprehensive energy efficiency lifting control method, which is characterized in that including
Following steps：First, by reading the data of hotel's plug-in card electricity getting system, the real-time personnel in hotel are obtained in room room number n, into
The real time personnel in hotel is calculated in room rate λ in one step；Second, according to hotel's real time personnel in room rate λ, dynamic, which calculates, works as forefathers
Member performs the highest outside air temperature T of control and regulation in room rate λendCorresponding host leaving water temperature desired value Tλ；The
Three, according to outside air temperature TOADynamic adjustment host chilled water leaving water temperature desired value TSET；4th, when hotel personnel are in room
When rate changes, the two-way valve opening of room air conditioner end can be held big or turn down or close automatically, lead to air conditioning water system
System changes for return main's pressure difference, by controlling chilled water for return water pressure difference value stabilization in desired value Δ P, to freezing pumping frequency
Rate carries out fuzzy control, improves the energy valid value (kW/ton) of refrigerating water pumpRefrigerating water pump, Air Conditioning Facilities chilled water system is further calculated
Comprehensive energy efficiency (kW/ton)Chilled water system；5th, it is calculated and analyzed by database model, judge the chilled water under current operating data
Whether system comprehensive energy efficiency is optimal, meanwhile, the operation data under each operating mode of central air conditioner system history is compared, obtains air-conditioner host
Optimal chilled water water outlet temperature setting value so that the whole efficiency of central air conditioner room chilled water system keeps optimum state.
2. Hotel Buildings central air conditioner room chilled water system comprehensive energy efficiency lifting control method according to claim 1,
It is characterized in that hotel personnel are calculated as in room rate λ：
λ=n/N；
Wherein：N-plug-in card takes electric room quantity；
N-hotel room sum；
λ-hotel personnel are in room rate.
3. Hotel Buildings central air conditioner room chilled water system comprehensive energy efficiency lifting control method according to claim 1,
It is characterized in that the highest outside air temperature T controlled to adjust is performed in the dynamic adjustment of room rate by hotel personnelendCorresponding
Host leaving water temperature desired value Tλ, TλComputational methods are：
Wherein, λ-current persons are in room rate；
λst- the minimum personnel controlled to adjust are performed in room rate；
λend- the highest personnel controlled to adjust are performed in room rate；
T1The minimum water outlet temperature setting value of-dynamic regulation host, ranging from 7~12 DEG C；
T2- dynamic regulation host maximum water temperature setting value, ranging from 7~12 DEG C.
4. Hotel Buildings central air conditioner room chilled water system comprehensive energy efficiency lifting control method according to claim 1,
It is characterized in that according to outside air temperature and hotel personnel in room rate dynamic regulation host leaving water temperature desired value, raising master
Machine operational efficiency, the Dynamic calculation method of air-conditioner host leaving water temperature target set point are：
Wherein, TOA- current outdoor air themperature；
TstThe minimum outside air temperature that-execution controls to adjust；
TendThe highest outside air temperature that-execution controls to adjust；
Tmax- host leaving water temperature highest set value, is formulated according to Host Type；
TλThe highest outside air temperature T that-execution controls to adjustendCorresponding host leaving water temperature desired value.
5. Hotel Buildings central air conditioner room chilled water system comprehensive energy efficiency lifting control method according to claim 1,
It is characterized in that adjusting chilled water pump running frequency for return water pressure difference by chilled water, the operational energy efficiency of chilled water pump is promoted, together
When, to chilled water pump constant-pressure drop adjust during, take into account meet in conversion process chilled water supply backwater temperature difference limit value and
The requirement of end least favorable pressure guarantee value.
6. Hotel Buildings central air conditioner room chilled water system comprehensive energy efficiency lifting control method according to claim 1,
It is characterized in that central air-conditioning operational parameter data library is formed, the analysis in real time during host and chilled water pump control to adjust
Whether computer room chilled water system comprehensive energy efficiency is optimal, and automatic seeking finds out optimal host chilled water leaving water temperature desired value to host
It adjusts again, realizes that the comprehensive energy efficiency of Hotels with Central Air-Condition chilled water system keeps optimal.
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| CN201711451150.4A CN108224632A (en) | 2017-12-27 | 2017-12-27 | Hotel Buildings central air conditioner room chilled water system comprehensive energy efficiency lifting control method |
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| CN112628888A (en) * | 2020-04-03 | 2021-04-09 | 中山职业技术学院 | Hotel central air-conditioning energy-saving system based on wireless |
| EP3839364A4 (en) * | 2018-12-14 | 2021-10-13 | GD Midea Heating & Ventilating Equipment Co., Ltd. | Method and device for controlling air conditioner and air conditioner |
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