>1 outline
The Xi'an triumphant Lai big hotel is according to four
star classes guesthouses standard construction comprehensive
intelligent construction, total floor space 64,000 m2, underground
two, on main building 30, skirt building 6, contain the underground
parking garage, the market, the theater, the dining entertainment,
four star classes guesthouses and manages the public room.
According to the building nature and the use function request,
for makes the building environment efficiency to enhance, the
equipment highly effective movement, energy cost reduction, selects
Honeywell Corporation Excel5000 construction equipment automated
system EBI (EnterpfiseBuildingsIntegrator, enterprise building
integration system).
This building construction equipment automated system main
monitoring object including the air conditioning unit system, the new
atmosphere unit system, the air blower plate tube long-distance
control system, the blast system, the exhaust system, for the aqueous
system, the drainage system, the elevator system, the lighting system,
straight burns the engine room cold heat source system and so on.
The BA system applies EXCEL5000 construction equipment automated
system EBI, carries on the computer management, the self-supervisory,
the survey, the control to above electromechanical device below, and
simultaneously realizes the overall function:
(1) to construction equipment realization take optimizing
control as central process control automation;
(2) take running status surveillance and integration as central
equipment management automation;
(3) take conserves energy the movement as the central energy
management automation.
2 buildings automated system EBI introduction
2.1 EBI system performance
EBI is a set which the Honeywell company promotes
applies to the building integration management module, EBI application
widespread lies in the system the fine performance, the modular
monitoring way and based on the network system nimble design, also had
decided EBI can provide to the electromechanical device for each kind
of application carries on the automated management the comprehensive
solution.
The EBI system design completely follows the existing industry
standard. EBI server movement in based on Windows2000 platform
in, EBI client movement in Windows2000 or WindowsNT? In 98
platforms, overall system network movement on fast ethernet, agreement
for standard TCP/IP.
The EBI system provides the BMS system and the third party
system integrated connection way includes: Network, ODBC,
AdvanceDDE, OPC standard SQL and so on many kinds of connections, and
supports industry standard and so on the BACnet, LonWorks.
The EBI system by the central station (PC) and the substation
(the scene DDC controller, including subsystem region management) is
composed. According to the monitoring equipment distributed
situation, the substation directly by the serial main line connection
way and the central station connects in together, this system central
station does not have the master control with the substation between
and the network controller and so on equipment, between all
controllers carries on the PEERTOPEER communication, guaranteed the
scene controller the independent working ability and the construction
of data as well as the communication speed do not have any change,
maintains in the different application the data uniformity and control
timeliness.
The EBI system field use transmission line uses the twisted pair
line, the central station sets at the network management through the
main engine in and the field bus connects, does not have other links,
namely the central station network management and the central station
main engine is the integration.
The scene subsystem (including VAV, FCU intelligent terminal
scene miniature DDC controller constitutes two levels of
communications networks scene subsystem) to be possible to reflect by
the region management injects in the field bus communication network.
The EBI system field bus network transmission speed is highest
may achieve 1Mbps, each main line length is 1200m, on each main line
connects the DDC controller quantity (including central workstation)
is 30.
The scene subsystem transmission network transmission speed is
78Kbps (uses in VAV equipment controller joint), does not need any to
switch over the equipment, each main line length is 1500m, connects
the miniature DDC controller quantity is 60.
2.2 EBI system characteristic
(1) friendly graph man-machine interactive contact
surface;
(2) supports local and the long-distance many high performances
workstation;
(3) provides the real-time monitoring to each kind of
electromechanical device;
(4) the function complete reports to the police the management;
(5) provides the massive historical data and the tendency chart;
(6) in sets at the many kinds of standard forms report form, and
provides the user from the definition report form form function;
(7) formidable application development kit;
(8) supports based on industry standard network this locality
and the long-distance multi- clients/server system;
(9) peacefully guarantees the data and the human resources
software system seamless integration;
(10) in view of large-scale user's multi- clients/server DSA
structure;
(11) in view of essential duty heat redundant function;
(12) ActiveX technology.
The EBI modular structure has safeguarded the performance/price
compared to and the good system extension, including expands from the
single pitch point system to many systems integrated application.
The EBI system control section based on the client/server
system, the real-time database provides the high performance the
real-time data processing, provides the real-time data information for
in this locality and the network workstation or other applications,
the hot redundant server provides has the higher stable request the
user safe reliable movement safeguard. May support in view of
each kind of different demand from the fast ethernet to WAN and so on
the many kinds of networks type and the structure. EBI supports
the HoneywellExcel5000 system each kind of controller, and supports
BACNet, LonWorks and so on the third party equipment.
3 BAS monitoring subsystem control implementation
3.1 air conditioning units system
Air-conditioning system including skirt building 39,
monitoring content as follows:
(1) opens/stops the control;
(2) delivers, returns to the wind temperature survey;
(3) the air blower running status, the breakdown report to the
police;
(4) water valve adjustment;
(5) the wind valve opens an adjustment;
(6) the mesh differential pressure reports to the police;
(7) manual/automatic condition;
The DDC controller to returns to the wind temperature and the
hypothesis temperature carries on the comparison, through the PI
control, adjusts for the water valve opens, makes the wind temperature
to maintain in supposes in the definite value scope, when the air
blower stops the water valve will be able to shut down.
Transition season closure water valve, in order to energy
conservation differential pressure switch surveillance 过滤?
condition, when 过滤?stops up, the differential pressure switch
then can send out the signal, urged the attendant cleans 过滤?
The air blower switch control mainly is the time sequencing
which supposes in advance through the BA system carries on opens stops
the control. In some special situations, if the working overtime
situation, the air blower has the need to establish outside the
timetable in advance the time start, the user may choose central in
BAS stands manually opens 停风 machine. Timetable the time
sequencing which central stands through BAS revises. After the
air conditioning unit starts automatically opens newly, returns to the
wind valve, and opens to the position which goes against sets, after
the unit engine off the automatic shut-off is new, returns to the wind
valve. Moves in the sky when the unit breaks down, the procedure
may be automatic chain-like stops the air conditioning unit the
movement, simultaneously closes the water valve, closes newly, returns
to the wind valve.
3.2 new atmospheres units system
New atmosphere system including main building new
atmosphere machine 61, group building new atmosphere machine 31;
Monitoring content as follows:
(1) opens/stops the control;
(2) blows of the temperature survey;
(3) the air blower running status, the breakdown report to the
police;
(4) frostproof reports to the police;
(5) water valve adjustment;
(6) new atmosphere valve switch control;
(7) manual/automatic condition.
The new atmosphere unit not returns to the wind, the DDC
controller carries on the PI control to the blast temperature, adjusts
the water valve to open, makes the blast temperature to maintain in
supposes in the definite value scope, when the new atmosphere machine
stops, the water valve shuts down.
The new atmosphere unit's running time control and the breakdown
interconnection control is similar to the air conditioning unit.
In order to prevent the plate tube freeze, after the winter
examines the plate tube the temperature to be lower than 5 ? forces
the unit engine off immediately, simultaneously completely turns on
the water valve, the shutting down new atmosphere valve,
simultaneously sends out to the central station reports to the police.
3.3 air blowers plates tube system
The air blower plate tube system including skirt
building 66, completely uses controls.
Main building 678, main building guesthouse great hall 20, two
buildings public regions 6, skirt building movie theater lobby 8, use
the long-distance air blower plate tube temperature controller to
carry on the control, the cloth controls, may carry on the
long-distance monitoring in the BAS central station; Including
the scene temperature surveillance, the water valve automatic control,
the air blower three fast conditions demonstrations and three fast
controls, carry on the temperature hypothesis in the central station.
Considered the important visitor extends moderate and manifests
take the guest as the thought which reveres, main building 27
presidents the anteroom 10 typhoons machine plates tube uses the
intelligence long-distance air blower plate tube temperature
controller to carry on controls, and may carry on the long-distance
surveillance in the central station, demonstrated the scene
temperature, the air blower three fast demonstrations, the scene
hypothesis temperature, the water valve open a surveillance.
3.4 ventilation systems
Has the skirt building as follows including the air
blower 28, main building 38, the monitoring content:
(1) the air blower opens/stops the control;
(2) the air blower moves and reports to the police the
condition;
(3) manual/automatic condition;
(4) when the air feeder broke down, the procedure might be
automatic chain-like stops the air feeder movement each typhoon
machine all already establishing the time sequencing, might
automatically carry on in the request scope opens stops the control,
this o'clock compartment might in central carry on the revision;
(5) a main building 屋面 frequency conversion air feeder,
responsibly gives the main building new air shaft supplement new
atmosphere, DDC through changes the delivering surveillance to the air
shaft pressure, windward machine carries on the frequency conversion
control, adjusts the new amount of wind.
3.5 gives the drainage system
The monitoring content including the life water pump 7,
the circulating water pump 4, the life water tank 2, the life basin 1,
fire pump 8, 集水?22, dumps pollutants to pump 38.
Monitoring content as follows:
(1) lives the water pump to open/closes the control, the running
status, the breakdown reports to the police, the hand/automatic
condition;
(2) dumps pollutants to pump opens/closes the control, the
running status, the breakdown reports to the police, the
hand/automatic condition;
(3) lives the water tank, the basin continual water level
examination;
(4) 集水?the high/low water level and ultra limits the
water level monitor;
(5) fire pump movement and malfunction surveillance.
The scene DDC controller monitor related water tank basin water
level, and opens according to the height water level stops the
corresponding water pump, guaranteed the water level maintains in the
control scope. In order to prevent because breakdown and so on
water pump to create the water overflow, establishes ultra limits the
water level monitor, when reaches this point the water level, the
system reports to the police, in order to the correlation personnel
promptly processes.
The DDC controller monitors the water pump the breakdown to
report to the police. When has reports to the police, stops this
water pump and in the operation stands reports to the police the
demonstration, reminds the arrangement concerned personnel to do the
overhaul work.
3.6 public lightings and flood lighting system
The lighting system control, divides into in the room
58 return routes public lightings and outside 15 return routes flood
lighting control, the monitoring content as follows:
(1) lighting system switch control;
(2) lighting system switch condition;
(3) may act according to the operating time and the holiday time
making timing control procedure, if has the need to establish outside
the timetable in advance the special movement, may central stand the
hand switch in BAS.
3.7 elevators systems
The connection which according to the elevator supplier
provides, the surveillance running status and the breakdown report to
the police.
3.8 straight burns the engine room cold heat source system
The DDC controller monitors straight burns the engine
room the air conditioning unit, delivers a row of air blower (2
blasts, 2 platoons winds). Through to the main building 屋面
inflation water tank water level monitor, controls 2 spatially to
transfer to a new post the water pump to open stops, through to
supplies the monitor which the backwater pressure transmitter presses,
the control to supply the backwater differential pressure by-pass
valve.
To 3 broadness: The spontaneous combustion unit carries on
the integration (MODBUS), central directly burns the unit in BAS to
carry on the condition and the parameter surveillance, realizes
straight burns the unit the automatic control and a movement digital
control.
This project BAS system has altogether used 11 XL500 large-scale
controller, 1 XLl00 medium controller, 63 XLS0 medium controller, 1
region management, 44 long-distance temperature controllers; The
entire control system used 4 C-BUS, 1 LON-BUS, 1 MODBUS; Central
station including 1 BAS server, 1 BAS workstation.
4 BAS system in implementation process experience
4.1 BAS object equipment monitoring, integrated
connection
Is controlled regarding BA the equipment, the owner
when purchases the equipment is best can with the BA project business
advance communication, provides has the appropriate BA connection the
electrically controlled box cabinet and the equipment, causes the BA
system to carry on the active control; Large-scale
electromechanical device and system, like cold water unit and so on,
when ordering should have the BA integration connection, the standard
correspondence agreement request, in order to future according to will
have to integrate.
4.2 centralized managements, disperser monitoring
The DDC controller suitable relative centralism,
establishes in most approaches the air conditioner, the water pump and
so on is controlled the equipment in the engine room or the weak
electricity small space, reduces the cost, facilitates the service.
4.3 about overall situation variable and sharing spot
The DDC controller suitable avoids sharing the spot as
far as possible, avoids cross BUS the linkage. If has cross BUS
the need, suitably first considered on two BUS during appropriate DDC
physical way realization, enhances the control the security
reliability.
The overall situation variable or the sharing spot are one kind
of linkage control variable, this kind of variable generally defines
in source DDC, then in must use this variable in goal DDC also to
carry on the definition. When in source DDC this variable
condition or change in value, in goal DDC variable corresponding
change. Therefore, this kind of variable can take the DDC
communication main line (BUS) on resources, when this kind of variable
quantity too many, is easy to create the main line communication to
stop up, therefore, this variable not suitable too are many. But
such as in the system the operating mode (winter summer operating mode
and so on) the variable, considered the operation the convenience,
should use the overall situation variable; Moreover, for aqueous
system in, water tank water level signal and water pump control
because in physics is away from very is possibly far, the water level
signal also should use the overall situation variable. In the
triumphant Lai big hotel project, utilizes the overall situation
variable, the control effect is very good.
If the control signal must involve to two main lines on DDC,
suggested do not have to carry on the overall situation variable
through the central monitoring station the transmission (only if uses
redundant overhead construction central station), because single
server overhead construction central station because each kind of
reason once is off-line, the overall situation variable transmission
will sever, creates the scene control signal severance, therefore the
suggestion will use between the main line the DDC hardware
transmission signal way. In this project the top digit water
item (in 30 DDC) with water plant DDC on a main line, between them
does not carry on through a middle DDC hardware the water level signal
the transmission, has achieved quickly, the reliable control effect.
4.4 about PH parameter 整定
In DDC controller debugging, regarding PID coefficient,
because the air-conditioning system itself inertia is bigger, should
choose the suitable sampling period and the control function, found
the BA systems control precision and the system stability found the
best balance point, the guarantee systems control optimization.
Regarding this project in air conditioning unit, through returns
to the wind temperature control water valve, because the temperature
change response is very slow, when 整定 PI parameter, should
比例?suppose narrowly, supposes long the integration time, like
this may guarantee the wind temperature the stability; But to
the new atmosphere unit, as a result of through the blast temperature
control water valve, the response cycle is shorter, meets 比例?
supposes the width, supposes short the integration time, thus
satisfies warm controls the request; But makes up the air blower
regarding the new air shaft, through new air shaft in high, center,
low three areas pressure weighted average control air blower
frequency, because pressure object time-constant smaller, for enhances
the system stability, must use PID (proportion, integral,
differential) controls, 比例?should establish widely, integration
time longer, the differential time is shorter, like this can satisfy
the control request.
4.5 installs the request about the sensor
The BA surveillance measuring element must correctly
choose installs the position. If the pressure changes
delivering, the flow sensor should install in the current capacity
stabilizes in the level straight length of pipe; The air flue
temperature sensor not suitably approaches delivers the gusty area,
not suitably too is also far to the gusty area, the temperature sensor
should avoid the partial cold heat source disturbance, the scene
choice reasonable position.
4.6 constructions matters needing attention
In the BA system pipeline design, the construction, in
the market and so on the great standard width place, in the suspended
ceiling the pipeline trend should consider the fire protection
district the division, avoids affecting guards against discharges fume
and so on the fire facility installment.
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