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sallen@sure365.com.cn
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Building 1-10, Huading New Area, Haitai Innovation 6th Road, Huayuan Industrial Zone (Outer Ring Road), Xiqing District, Tianjin City
About Us
Tianjin Xun'er Technology Co., Ltd
Date: 2025-03-12Read: 9
The urban centralized heating system mainly consists of four parts: heat source, heating network, heat exchange station, and various forms of heat users. This system provides effective heat supply through a centralized form of heat source, using hot water or steam as a transfer medium to meet the heat demand of a region or even the entire city through a heating network. It is mainly responsible for production heat and residential heating.
By using a certain number and function of sensor combinations, heating companies can conveniently monitor the indoor temperature of heat exchange stations and residents in different areas in real time. Combined with remote control systems to regulate water supply and return, efficient heating can be achieved, thereby avoiding excessive energy waste and carbon emissions increase.
In the process of urban centralized heating, there are mainly three types of sensors commonly used:
■ Flow meter■ Temperature sensor ■ Pressure sensor
Application of sensors in heat exchange stations
flow meter：
In the heating system, flow meters can monitor the flow rate and flow rate of heating water, assist heating enterprises in grasping the overall output of heating water, and statistically analyze the difference between the outflow and return water volume, so as to replenish water reasonably and ensure the heating effect.
temperature sensor：
In the heat exchange station, temperature sensors can be used to monitor both the factory temperature of heating water and the temperature of residential rooms. Real time temperature display feedback can help us regulate the water supply temperature and detect equipment failures in a timely manner.
Pressure sensordevice：
Under normal circumstances, the heating system needs to maintain a certain pressure value to function properly (usually around 1.0-1.5 bar). And pressure sensors are instruments used to monitor the liquid pressure inside heating systems.
Xun'er on-site application case
A project in Hebei Province is building three new heat exchange stations for residential areas to ensure winter heating for old communities.Each heat exchange station requires 3 flow meters forFlow measurement on primary and secondary water supply pipelines. The instrument is required to withstand high temperatures to cope with high temperatures in the pipeline network. Moreover, negative pressure is often generated on-site during maintenance or other emergencies in the water supply network. Flow meters installed on the water supply network should have good negative pressure resistance performance.
In addition, there need to be 4 temperature sensors and 4 pressure sensors on the heat exchange station, and the product is required to have a display. There are primary supply and return water temperature, secondary supply water temperature, secondary supply water pressure, and secondary return water pressure used for control.
Based on the actual situation on site, the Xun'er team has developed targeted solutions for customers, matching corresponding flow meters, temperature sensors, and pressure sensors according to the customer's on-site caliber, temperature, flow range, etc., to ensure measurement accuracy and stability.
In terms of flowmeter selection, we chose an electromagnetic flowmeter for the customer because the design temperature of the primary network is usually 130 ℃ for water supply and 70 ℃ for return water, using F46 lining. The design temperature of the secondary network is generally 80 ℃ for water supply and 60 ℃ for return water, using PTFE lining. The circulating water has a single composition and no corrosiveness, so we chose 316L electrode.
Considering that heating is usually only carried out in winter, and the sealing measures of heat exchange stations are not very good, indoor and outdoor hot and cold air may meet, and water vapor is prone to condensation. Therefore, IP68 protection level is selected. And configure appropriate temperature and pressure sensors.
At present, the equipment of the heat exchange station units is being debugged one after another, preparing for heating this winter. The product performance is stable during testing, ensuring the accuracy of data collection for the heat exchange station. In the early stage, Xun'er staff provided installation guidance and arranged technical personnel to train the heat exchange station staff on instrument operation and maintenance. The on-site instrument personnel stated that Xun'er provides good service, has strong consistency in the product platform, is easy to maintain, and improves work efficiency. At the same time, the instrument has a self diagnostic function to ensure the safety of use.
Recommended on-site application products
Product Features:
■Suitable for measuring conductive liquids, especially suitable for media such as sewage, chemical solutions, tap water, etc;
Accuracy levels of 0.5 and 0.2;
Low flow velocity measurement, capable of measuring a flow velocity of 0.1m/s;
The instrument diameter covers DN4~DN2000;
■ It has explosion-proof function, with protection levels of IP65 and IP68;
■ It has multiple communication options such as RS485, HART, 4G, NB IoT, etc.
Product Features:
Specially designed for cold and hot metering, with strong targeting and high cost-effectiveness;;
■ No blocking components, almost no pressure loss;;
Designed for long-term use at 150 ° C;
Strong corrosion resistance;
■Strong targeted measurement range and high signal resolution.
Product Features:
■ Equipped with linearization correction function, thermocouple temperature transmitter has automatic compensation function for cold junction temperature;
■ Spring type temperature sensing element with good seismic performance;
Large measurement range and high measurement accuracy;
High mechanical strength and good pressure resistance;
Short response time.
Product Features:
Easy to install, can be directly installed or installed using a bracket;
High precision, high stability, high reliability, strong resistance to frequency conversion interference;
Gauge pressure, absolute pressure, and negative pressure can all be measured;
Zero point transferability and adjustable range;
Support networking applications.