The scheme is an integrated transportation and maintenance solution for central
heating engineering. The whole solution takes the Internet of Things, heat
supply network calculation analysis and whole-network balancing technique as
the core, aims to achieve energy-saving and consumption-reduction through
optimal control; the seamless integration of automation and information enables
production dispatching in the whole central heating system, truly realizes the
thermo-dynamical balance in the heat power supply system among the heat source,
heat supply network and the heat exchange station, and attains the goal of
integrating production control, production management and operation management.
Terminal control; Heat metering; Balanced across the network; Dispatching optimization; Unattended operation; Delicacy control.
operation & maintenance system
on the automatic modification of each link of heat supply and energy
conservation, the system allows for centralized monitoring of each link data
which is originally controlled in a distributed way, simultaneously supports
data analysis and optimization management; and the business scope covers heat source
regulation, heat exchange station monitoring and thermal network monitoring,
terminal metering temperature control and the heat supply by renewable energy,
architecture information platform;
efficiency diagnostic analysis schedule;
optimization through whole network dispatching;
management real-time control.
operation & maintenance platform software
on ToFine’s pioneering and widely accepted energy information five-layer
architecture in the industry, ToFine aims to provide an excellent heat supply
information platform software characterized by technology maturity,
architecture-leading, cloud-based computation and Internet-of-Things
· Full compliance with national standards;
· Full compliance with industry specifications;
· Response to actual energy pipeline requirements;
· Quantifiable energy-saving benefits.
support the mobile terminal
system fully supports mobile terminal access, users can log in the platform
anytime and anywhere through the pad and mobile phone; the App and WeChat
application enables real-time data interaction and good user experience.
system based real-time monitoring
Real-time monitoring—pipeline network monitoring
the deployment of whole heat supply network from the heat source to;the
heat transfer station;
icons are used to represent different objects (heat source, heat transfer
· Sites with
abnormal condition are represented by different colors;
· You can
view site data directly on a map.
Real-time monitoring—room temperature monitoring
wireless room temperature monitoring equipment is deployed to remotely control
the indoor temperature of the user, so as to guide the operation of the thermal
network, timely adjust the heat output, thereby ensuring the heating effect,
improving the service quality, reducing the energy consumption and labor
intensity, and reducing the operation management cost.
Whole-network dispatching control strategy
system covers the whole network dispatching control strategy of heat source
load forecast dispatching, primary network balance control, secondary network
balance control, regulation of secondary network quality to the heat exchange
station and volume regulation, so as to achieve the optimal operating
Heat load real-time correction model
using the energy-saving analysis and evaluation model system, create the
thermal load real-time correction model of the heat transfer station based on
the design heat load and annual heat load data of heat exchange station.
Prediction of heat load on the whole network
to the real-time weather forecast, based on the heat load model of heat
exchange station, it is able to conduct heat load forecast in the whole
network, establish heat supply scheme and set the optimal operating
· Whole network;balance control
on the current operating conditions of all stations, the platform can calculate
the appropriate average temperature of supply and return water in the secondary
network, and when the control parameters (control cycle, step, dead zone) of
each heat exchange station are considered, we can automatically adjust the
opening degree of the primary side water supply valve one by one, so as to
regulate the heat supply and heat distribution in the whole thermal network.
· Secondary network quality regulation;
to the climate compensation and behavior mode, the system establishes a
plurality of curves of the set secondary water supply temperature value, and
adjusts the heat exchange efficiency of the secondary network heat exchanger
according to the actual working condition, so as to achieve the effect of
dynamic energy saving.;
Secondary network quantity regulation
When the outdoor temperature is low, the secondary network quantity regulation
can be started, and by controlling the working frequency of circulating pump
and increasing the heat exchange quantity, the heating demand at the most
unfavorable point of the end can be satisfied.
to the principle of “centralized monitoring and remote control”, a controller
system with network communication function is arranged in on-site control
cabinet of the heat exchange station, and an upper computer system with network
communication, data storage, display, analysis and processing functions is
arranged in the dispatching center;
The whole system consists of the dispatching monitoring center, data
communication network and on-site controller. The on-site controller mainly
collects real-time process parameters such as the temperature, pressure, flow
rate, liquid level and the like of primary and secondary network in each heat
exchange station, and reflect and control the state of various operation
devices in real time;;under the support of the communication network, the
data reflecting the operation state of heat exchange station is transmitted to
the dispatching monitoring center through a certain network interface, while
the dispatching control instruction from dispatching monitoring center is
received; the dispatching monitoring center is responsible for receiving the
data sent from each site monitoring equipment, for data storage, historical
trend analysis, alarming, report printing and on the basis of this, can send
dispatching control instructions to each field device.
The following figure is a schematic diagram of the network architecture for
consumption analysis indicators cover the complete process of heat supply,
including the energy production, processing, conversion, distribution and user
Evaluation and optimization
platform integrates the energy-saving analysis and evaluation model system,
gives the evaluation conclusion of the current energy consumption level of each
station, and puts forward the optimization suggestion.
The energy consumption analysis function is used to analyze the data such as
heat consumption, water supply amount, power consumption, boiler efficiency and
the like; enable efficiency analysis of boiler, intuitively reflect the
capacity efficiency of the boiler subordinate to the heat supply company, and
provide data basis for the management unit to rectify and eliminate the
backward production capacity of the boiler.
terms of energy transportation and distribution, enable energy transportation
and distribution efficiency analysis of pipeline network, and provide data
basis for management unit to evaluate the capability of each heat supply
network; from the perspective of heat transfer station, the heat load
forecasting function is firstly used to generate the planned heat load index,
and then based on the heat load analysis, effectively evaluate the compliance
of each heat transfer station with heat production requirements.
In addition, the heat loss analysis is provided in the process and conversion
process, and more data support is provided for the management unit to evaluate
the energy-saving operation of the heat exchange station.
Equipment operation state management
of the real-time running status and fault information of equipment.
of working state parameters such as overall operation duration, on-off frequency
after putting equipment in service.
status maintenance: After querying the equipment according to the query
conditions, click the icon of each record selected, enter the device status
change interface, and change the device status information.
of power consumption rate of equipment: used to calculate power consumption of
equipment for a period of time.
Equipment account information
basic equipment information: pinpoint device information and location through
accurate query and fuzzy query.
information: enter and query equipment failure and maintenance information.
information: enter and query equipment maintenance information.
Patrol inspection query
inspection personnel can perform location query, information query, route
query, maintenance record and material query.
issue, track, execute and assess dispatch instructions to realize closed-loop
management of dispatching tasks.
Patrol inspection report
· The number
and implementation of patrol tasks, the details clock-in/out time and place of
patrol inspection personnel are displayed in the form of reports.
station control system
The system can fully support the automatic
control functions such as unattended operation, valve, circulation, water
supply and other equipment in the heat exchange station.
Automatic control function
starting and stopping and the frequency conversion output of circulating pump
are controlled through the differential pressure of the second network;
· The water
supply is controlled by constant pressure;
· Control the
valve/ booster pump through the average temperature difference of secondary
water supply network /secondary return water;
· The water
inlet of water tank is controlled through the liquid level.
and over-pressure protection: all control loops are provided with PV limit
protection: When the water supply temperature of the secondary network exceeds
the high limit value, electric regulating valve/ booster pump in the primary
network is closed.
When return water temperature of the primary network exceeds high limit value,
high limit protection will be started, and the opening of electric regulating
valve/ the frequency of booster pump will be controlled with the return water
temperature in the primary network as the target.
Immediately close the electric control valve/
booster pump in the primary network and generate alarm when the return water
temperature in the primary network exceeds high limit value;
loss protection: when the return water pressure in the secondary network is
lower than the ultra-low limit value, the circulating pump is automatically
stopped, the electric control valve/ booster pump is closed, automatic water
supply system is put into operation and the water supply is started.
protection: when the water supply pressure of the secondary network exceeds the
setting ultrahigh limit value, circulating pump will stop running and the
electric regulating valve/ booster pump in the primary network will be
supply low-frequency operation protection: water supply pump is operated at low
frequency for a certain time, and when the pressure at constant pressure point
is stable, the water supply pump is stopped, and when the pressure falls below
the set value, the water supply pump is restarted. The low frequency logic is
enabled only when one pump is operated;;
stop protection: When the circulating pumps are fully stopped, the valve is
closed to the lower limit value/ booster pump stops operation.
Automatic switchover function
control: calculation values of two heat supply temperature setting curves in
control: periodic switching of pumps;
control: under maintenance state, the system will automatically stop relevant
dispatching of the pump;
start-up of dual-plate double-pump unit: in a dual-plate double-pump heat
exchange station, if a unit stops working due to failure, the circulating pump
in the second unit will start automatically and continuously supply heat.